阅读说明：本技术 集成无源器件封装结构及其制作方法和基板 (Integrated passive device packaging structure and manufacturing method thereof and substrate ) 是由 陈先明 冯磊 黄本霞 谢炳森 洪业杰 于 2020-06-29 设计创作，主要内容包括：本申请公开了一种集成无源器件封装结构及其制作方法和基板,该方法包括步骤：提供带有埋芯空腔和金属柱的有机框架,在有机框架上表面层压至少一层第一介质,并对至少一层第一介质进行光刻形成开口,开口对应设置在埋芯空腔上方；通过开口贴装电子元件至埋芯空腔,电子元件包括上电极和下电极,分别位于埋芯空腔的上部和下部；层压第二介质至埋芯空腔内部以及第一介质上表面并固化；减薄第一介质和第二介质,露出上电极、下电极以及金属柱的上下表面；电镀金属,形成线路层,线路层与上电极、下电极和金属柱连通。本申请可以提升单位面积内无源器件的排布密度,缩短布线距离,实现无源器件的集成封装。(The application discloses an integrated passive device packaging structure, a manufacturing method thereof and a substrate, wherein the method comprises the following steps: providing an organic frame with a core-embedded cavity and a metal column, laminating at least one layer of first medium on the upper surface of the organic frame, and photoetching at least one layer of first medium to form an opening, wherein the opening is correspondingly arranged above the core-embedded cavity; mounting an electronic element to the core embedding cavity through the opening, wherein the electronic element comprises an upper electrode and a lower electrode which are respectively positioned at the upper part and the lower part of the core embedding cavity; laminating a second medium to the inner part of the embedded core cavity and the upper surface of the first medium and curing; thinning the first dielectric and the second dielectric to expose the upper electrode, the lower electrode and the upper and lower surfaces of the metal column; and electroplating metal to form a circuit layer, wherein the circuit layer is communicated with the upper electrode, the lower electrode and the metal column. The application can improve the arrangement density of the passive devices in unit area, shorten the wiring distance and realize the integrated packaging of the passive devices.)

1. A manufacturing method of an integrated passive device packaging structure is characterized by comprising the following steps:

providing an organic frame with a core-embedded cavity and a metal column, laminating at least one layer of first medium on the upper surface of the organic frame, and photoetching the at least one layer of first medium to form an opening, wherein the opening is correspondingly arranged above the core-embedded cavity;

mounting an electronic element to the embedded core cavity through the opening, wherein the electronic element comprises an upper electrode and a lower electrode which are respectively positioned at the upper part and the lower part of the embedded core cavity;

laminating a second medium to the inside of the embedded core cavity and the upper surface of the first medium, solidifying, thinning the first medium and the second medium, and exposing the upper electrode, the lower electrode and the upper and lower surfaces of the metal column;

And electroplating metal to form a circuit layer, wherein the circuit layer is communicated with the upper electrode, the lower electrode and the metal column.

2. The method of fabricating an integrated passive device package structure of claim 1, further comprising: and respectively forming a metal seed layer on the upper surface and the lower surface of the organic frame, wherein the metal seed layer covers the upper electrode, the lower electrode and the surface of the metal column.

3. The method of fabricating an integrated passive device package structure of claim 2, further comprising: and etching the metal seed layer, depositing a solder mask on the upper surface and the lower surface, and photoetching the solder mask to form an electrode window of the circuit layer.

4. The method of claim 1, wherein the number of the embedded cavity, the metal pillar and the electronic component is at least one.

5. The method for manufacturing the integrated passive device package structure of claim 4, wherein the electronic component is one or more in type.

6. The integrated passive device package structure fabrication method of claim 1, wherein thinning the first dielectric and the second dielectric comprises at least one of:

Thinning the first medium and the second medium in a plasma etching mode;

thinning the first medium and the second medium in a plate grinding and polishing mode;

thinning the first medium and the second medium in a laser drilling mode;

and thinning the first medium and the second medium in any combination of plasma etching, plate grinding and polishing and laser drilling.

7. The method of claim 1, wherein the opening is a stepped opening.

8. The method for manufacturing an integrated passive device package structure according to any one of claims 1 to 7, further comprising connecting a plurality of the organic frames by laminating a plurality of layers of the second dielectric and etching and electroplating metal posts and wiring layer forming connectors on each layer of the second dielectric to realize a multi-layer electronic component package.

9. An integrated passive device package structure, comprising:

at least one layer of organic frame, the organic frame comprises at least one core-embedded cavity and at least one metal column;

the electronic element is vertically attached in the core embedding cavity and comprises an upper electrode and a lower electrode which are respectively positioned at the upper part and the lower part of the core embedding cavity;

And the circuit layer covers the upper surface and the lower surface of the organic frame and is communicated with the upper electrode, the lower electrode and the metal column.

10. A substrate comprising the integrated passive device package structure of claim 9.

Technical Field

The application relates to the technical field of semiconductor packaging, in particular to an integrated passive device packaging structure, a manufacturing method thereof and a substrate.

Technical Field

With the continuous development of microelectronic technology, the demand for high-density packaging technology is increasing, and the demand for high-density packaging technology requires that a large number of elements are arranged and mounted on the surface of a printed circuit board and high-precision patterns and thin multi-layer manufacturing are performed.

At present, all embedded components on the market are horizontally arranged in a board, and the length size of the components is large, so that the density of the components in a unit surface area is relatively limited, and the requirements of miniaturization and integration of a packaging substrate cannot be met.

Content of application

The present application is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, the present application provides an integrated passive device package structure, a method of fabricating the same, and a substrate, and the following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. The technical scheme is as follows:

In a first aspect, an embodiment of the present application provides a method for manufacturing an integrated passive device package structure, including the following steps:

providing an organic frame with a core-embedded cavity and a metal column, laminating at least one layer of first medium on the upper surface of the organic frame, and photoetching the at least one layer of first medium to form a stepped opening, wherein the stepped opening is correspondingly arranged above the core-embedded cavity;

mounting an electronic element to the core-embedding cavity through the stepped opening, wherein the electronic element comprises an upper electrode and a lower electrode which are respectively positioned at the upper part and the lower part of the core-embedding cavity;

laminating a second medium to the inside of the embedded core cavity and the upper surface of the first medium, solidifying, thinning the first medium and the second medium, and exposing the upper electrode, the lower electrode and the upper and lower surfaces of the metal column;

and electroplating metal to form a circuit layer, wherein the circuit layer is communicated with the upper electrode, the lower electrode and the metal column.

According to the manufacturing method of the integrated passive device packaging structure of the embodiment of the first aspect of the application, at least the following beneficial effects are achieved: on the first hand, the passive electronic element is vertically implanted into the substrate, so that the arrangement distance of the electronic element in the horizontal direction is greatly reduced, the arrangement density of the substrate in unit area is improved, the wiring distance is shortened, the capacity of the electronic element in unit area is increased, and the miniaturization of the packaging substrate is realized; in the second aspect, the passive electronic elements of different models and sizes can be simultaneously integrated and packaged, and diversification and integration of substrate functions are improved.

Optionally, in an embodiment of the present application, the method further includes: and respectively forming a metal seed layer on the upper surface and the lower surface of the organic frame, wherein the metal seed layer covers the upper electrode, the lower electrode and the metal surface.

Optionally, in an embodiment of the present application, the method further includes: and removing the photosensitive barrier layer, etching the metal seed layer, depositing a solder mask layer on the upper surface and the lower surface, and photoetching the solder mask layer to form an electrode window of the circuit layer.

Optionally, in an embodiment of the present application, the number of the core embedded cavity, the number of the metal pillar, and the number of the electronic element are at least one.

Optionally, in an embodiment of the present application, the electronic component is one or more kinds.

Optionally, in an embodiment of the present application, the manner of thinning the first medium and the second medium includes at least one of:

thinning the first medium and the second medium in a plasma etching mode;

thinning the first medium and the second medium in a plate grinding and polishing mode;

thinning the first medium and the second medium in a laser drilling mode;

And thinning the first medium and the second medium in any combination of plasma etching, plate grinding and polishing and laser drilling.

Optionally, in an embodiment of the present application, the opening is a stepped opening.

Optionally, in an embodiment of the present application, the method further includes connecting a plurality of the organic frames by laminating a plurality of layers of second dielectrics and etching and electroplating metal pillars and line layers to form connectors on each layer of the second dielectrics to realize a multi-layer electronic component package.

In a second aspect, an embodiment of the present application provides an integrated passive device package structure, including:

the organic framework comprises at least one embedded core cavity, at least one metal column and an organic medium filled in the organic framework;

the electronic element is vertically attached in the core embedding cavity and comprises an upper electrode and a lower electrode which are respectively positioned at the upper part and the lower part of the core embedding cavity;

and the circuit layer covers the upper surface and the lower surface of the organic frame and is communicated with the upper electrode, the lower electrode and the metal column.

According to the integrated passive device packaging structure of the embodiment of the second aspect of the application, at least the following beneficial effects are achieved: according to the packaging substrate, the passive electronic elements are vertically implanted into the substrate, so that the arrangement distance of the electronic elements in the horizontal direction is greatly reduced, the arrangement density of the substrate in unit area is improved, the wiring distance is shortened, the capacity of the electronic elements in unit area is increased, and the miniaturization of the packaging substrate is realized; in the second aspect, the passive electronic elements of different models and sizes can be simultaneously integrated and packaged, and diversification and integration of substrate functions are improved.

In a third aspect, embodiments of the present application provide a substrate including the integrated passive device package structure as described in the second aspect above.

The substrate according to the embodiment of the third aspect of the present application has at least the following beneficial effects: according to the packaging substrate, the passive electronic elements are vertically implanted into the substrate, so that the arrangement distance of the electronic elements in the horizontal direction is greatly reduced, the arrangement density of the substrate in unit area is improved, the wiring distance is shortened, the capacity of the electronic elements in unit area is increased, and the miniaturization of the packaging substrate is realized; in the second aspect, the passive electronic elements of different models and sizes can be simultaneously integrated and packaged, and diversification and integration of substrate functions are improved.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

Fig. 1 is a flowchart illustrating steps of a method for fabricating an integrated passive device package structure according to an embodiment of the present application;

fig. 2 to 8 are cross-sectional views of an intermediate state of a method for fabricating an integrated passive device package structure according to another embodiment of the present application;

fig. 9 is a cross-sectional view of an integrated passive device package structure provided by another embodiment of the present application.

Fig. 10-19 are cross-sectional views of an integrated passive device package structure fabrication method in an intermediate state, according to another embodiment of the present application;

fig. 20 is a cross-sectional view of an integrated passive device package structure provided by another embodiment of the present application.

The organic frame 100, the embedded cavity 120, the metal pillar 130, the second metal pillar 130a, the third metal pillar 130b, the first dielectric 200, the step-shaped opening 210, the electronic component 300, the upper electrode 310, the lower electrode 320, the second dielectric 400, the circuit layer 500, the second circuit layer 500a, the third circuit layer 500b, the metal seed layer 600, the solder resist layer 700, the electrode window 710, the photosensitive barrier layer 800

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not restrictive, and therefore do not represent any changes in the technical spirit, structure, proportion, or size which may occur or which may not affect the performance or objectives achieved thereby, and are intended to be covered by the teachings herein.

Reference will now be made in detail to the present embodiments of the present application, preferred embodiments of which are illustrated in the accompanying drawings, which are for the purpose of visually supplementing the description with figures and detailed description, so as to enable a person skilled in the art to visually and visually understand each and every feature and technical solution of the present application, but not to limit the scope of the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present number, and larger, smaller, inner, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

Referring to fig. 1 and 3, a method for manufacturing a capacitor-inductor embedded structure according to an embodiment of the present application includes the following steps:

step S100, providing an organic frame 100 with a core-embedded cavity 120 and metal pillars 130, laminating at least one layer of first medium 200 on the upper surface of the organic frame 100, and performing photolithography on the at least one layer of first medium 200 to form a step-shaped opening 210, where the step-shaped opening 210 is correspondingly disposed above the core-embedded cavity 120, specifically, as shown in fig. 2, the organic frame 100 has an upper surface and a lower surface, at least one metal pillar 130 is connected, and the core-embedded cavities 120 arranged in an array manner are generated according to the size of the embedded electronic component. Each of the embedded core cavities 120 may be designed to be at least one or more according to actual requirements, as shown in fig. 3, the first medium 200 is twice laminated on the upper surface of the organic frame 100, the first medium 200 is exposed and developed to be patterned to form discrete step layers, a step-shaped opening 210 is formed between every two step layers, the step-shaped opening 210 is disposed above the embedded core cavity 120, it should be noted that the step-shaped opening 210 is disposed to facilitate the electronic component 300 to be obliquely offset mounted into the embedded core cavity 120, the step number of the step-shaped opening 210 may be made according to actual conditions such as the size of the electronic component 300 to be mounted, and may be greater than or equal to 1, preferably, in this application, the step number of the step-shaped opening 210 is 2, that is, that the first medium 200 is laminated twice.

Step S200, the electronic component 300 is attached to the embedded core cavity 120 through the stepped opening 210, where the electronic component 300 includes an upper electrode 310 and a lower electrode 320, which are respectively located at the upper portion and the lower portion of the embedded core cavity 120, specifically, as shown in fig. 4, first, an adhesive tape is attached to the lower surface of the organic frame 100 for temporarily sealing the lower surface of the organic frame 100, and then, the electronic component 300 is partially attached to the step by offset attachment, the electronic component 300 slides down to the bottom of the hole of the embedded core cavity 120 along the step under the action of gravity, and when the electronic component 300 is attached to the bottom of the hole of the embedded core cavity 120, the lower electrode 320 is in contact with the adhesive tape, it should be noted that the electronic component 300 may be a discrete passive device, such as a resistor, a capacitor, and an inductor, or any combination device.

Step S300, laminating and curing a second medium 400 inside the embedded cavity 120 and on the upper surface of the first medium, thinning the first medium 200 and the second medium 400, and exposing the upper and lower surfaces of the upper electrode 310, the lower electrode 320, and the metal pillar 130, specifically, as shown in fig. 5, laminating and filling the second medium 400 on the upper surface of the organic frame 100, so that the second medium 400 fills the space outside the electronic component 300 in the embedded cavity 120, and the second medium 400 completely covers the step layer formed by the electronic component 300 and the first medium 200, and performing thermal curing, where the purpose of the thermal curing is to harden the materials of the first medium 200 and the second medium 400, thereby facilitating the subsequent processes; as shown in fig. 6, the first medium 200 and the second medium 400 which are hardened are thinned to expose the upper surfaces of the upper electrode 310 of the electronic component 300 and the metal pillar 130 of the organic frame 100, and further the adhesive tape attached to the lower surface of the organic frame 100 is removed to expose the lower electrode 320 of the electronic component 300 and the lower surface of the metal pillar 130 of the organic frame 100, where the manner of thinning the first medium 200 and the second medium 400 includes various manners, such as thinning the first medium 200 and the second medium 400 by plasma etching (plasma), thinning the first medium 200 and the second medium 400 by physical plate polishing (physical plate polishing), thinning the first medium 200 and the second medium 400 by laser drilling (laser drilling), or thinning the first medium 200 and the second medium 400 by any combination of plasma etching, plate polishing and laser drilling, preferably, in one embodiment of the present application, the thinning is performed by a combination of plasma etching and laser drilling, as shown in figure 7, a metal seed layer 600 is formed on the upper and lower surfaces of the organic frame 100, respectively, and the metal seed layer 600 covers the surfaces of the upper electrode 310, the lower electrode 320 and the metal pillar 130, and it should be noted that, depositing a metal seed layer 600 on the upper and lower surfaces of the thinned organic frame 100, so that the metal seed layer 600 covers the upper and lower surfaces, and all the through-via hole walls to achieve the communication of the electrical characteristics, and the manner of depositing the metal seed layer 600 includes physical sputtering and chemical plating, preferably, in one embodiment of the present application, the physical sputtering is used to deposit the metal seed layer 600, the thickness of the metal seed layer 600 is defined according to the actual requirements, in one embodiment of the present application, the metal seed layer 600 has a thickness in a range of 800nm to 2000 nm.

The first medium 200 and the second medium 400 are made of organic materials, and include a prepreg (PP), a film type resin (ABF), or a photosensitive resin, where the prepreg and the film type resin may be thinned by plasma etching, plate polishing, or laser drilling, and the photosensitive resin may be thinned by exposure and development.

Step S400, electroplating metal to form a circuit layer 500, wherein the circuit layer 500 is communicated with the upper electrode 310, the lower electrode 320 and the metal pillar 130, specifically, as shown in fig. 8, attaching photosensitive barrier layers 800 on the upper and lower surfaces of the organic frame 100, performing photolithography on the photosensitive barrier layers 800 to perform patterning, exposing the electroplating region of the circuit layer 500, performing metal electroplating on the upper and lower surfaces to form the circuit layer 500, wherein the circuit layer 500 covers the upper and lower surfaces of the upper and lower electrodes 310 and 320 and the metal pillar 130 of the electronic component 300, the thickness of the circuit layer 500 can be set according to actual design requirements, as shown in fig. 9, removing the photosensitive barrier layers 800 on the upper and lower surfaces, etching the metal seed layer 600 to keep the metal seed layer 600 consistent with the circuit layer 500, and completing vertical packaging of the single-layer passive electronic component 300, and it should be noted that the metal seed layer 600 is deposited to make the metal circuit layer 500 consistent with the upper and lower electrodes 320 of the electronic component 300 and the upper and lower surfaces and the metal pillar Better connection and improved electrical characteristics.

It should be noted that, compared to the conventional horizontal embedded structure of the electronic component 300, when the vertical embedded package is performed, because the length of the vertical electronic component 300 is large, the stepped opening 210 needs to be arranged for offset mounting of the vertical electronic component 300, the height of the organic frame 100 can be adjusted according to the length of the vertical electronic component 300, the number of the vertical electronic components 300 packaged in the same layer can be one or multiple, so as to implement integrated package of electronic components 300 of the same layer and the same model, the type of the vertical electronic component 300 can be one or multiple, so as to implement integrated package of electronic components 300 of the same layer and the multiple models, and only the size of the embedded core cavity 120 needs to satisfy the largest length of the type of the vertical electronic component 300.

Referring to fig. 2 to 20, another embodiment of the present application further provides a method for manufacturing an integrated passive device package structure, as shown in fig. 10, continuing to attach photosensitive barrier layers 800 to the upper and lower surfaces of the structure shown in fig. 8, performing photolithography on the photosensitive barrier layers 800 to perform patterning, exposing second metal vias, electroplating the second metal vias to form second metal pillars 130a, performing build-up design, where the second metal pillars 130a are connected to the surface of the circuit layer 500, and it should be noted that a double-sided build-up structure may be formed by performing double-sided photolithography and electroplating according to design requirements, or a single-sided build-up structure may be formed by performing build-up on a single side, and in one embodiment of the present application, performing single-sided build-up design, as shown in fig. 11, removing the photosensitive barrier layers 800 on the upper and lower surfaces, etching the metal seed layer 600 to make the metal seed layer 600 and the circuit layer 500 consistent, as shown in fig. 12, the second medium 400 is respectively laminated on the upper surface and the lower surface of the structure shown in fig. 11, and a thinning process is performed on the second medium 400, so that the upper surface of the second metal pillar 130a is flush with the surface of the second medium 400, as shown in fig. 13, a metal seed layer 600 and a photosensitive barrier layer 800 are sequentially formed on the upper surface of the structure shown in fig. 12, a second circuit layer window is formed by photoetching the photosensitive barrier layer 800, metal is electroplated, and a second circuit layer 500a is formed on the surface of the second medium 400, it should be noted that a single-sided design or a double-sided design can be performed, which both belong to the protection scope of the present application, and in an embodiment of the present application, a single-sided design is performed; as shown in fig. 14, a photosensitive barrier layer 800 is attached to the upper surface of the structure shown in fig. 13, a third metal pillar 130b is formed by photolithography and metal plating on the photosensitive barrier layer 800, as shown in fig. 15, the photosensitive barrier layer 800 is removed, the metal seed layer 600 is etched to make the metal seed layer 600 and the second circuit layer 500a consistent, as shown in fig. 16, an upper organic frame 100 is fabricated on the upper surface of the structure shown in fig. 15, as shown in fig. 17 to 19, an electronic component 300 is attached to the upper organic frame 100 to form a third circuit layer 500b, so as to realize a vertical packaging structure of a two-layer electronic component 300, wherein the upper and lower electronic components 300 are electrically connected with each other through the circuit layer 500, the second circuit layer 500a, the third circuit layer 500b, the metal pillar 130, the second metal pillar 130a and the third metal pillar 130b, and the vertical packaging of the electronic component 300 can be performed through adding two layers and more than two layers on one side or two sides as required by design, in one embodiment of the present disclosure, a single-sided build-up two-layer design is performed, as shown in fig. 20, solder masks 700 are deposited on the upper and lower surfaces of the structure shown in fig. 19, the solder mask 700 is lithographically formed into electrode windows 710 of the circuit layer 500, electrical characteristics are extracted to facilitate the connection of the electronic component 300 with an external circuit, and finally, rare metal plating is performed on the surfaces of the electrode windows 710 to perform oxidation resistance treatment, so that the rare metal has the characteristics of stable chemical properties, corrosion resistance and the like, and the oxidation of the electrode windows 710 can be prevented.

Based on the manufacturing method of the integrated passive device packaging structure, various embodiments of the integrated passive device packaging structure are provided.

Referring to fig. 9, another embodiment of the present application further provides an integrated passive device package structure including an organic frame 100, the organic frame 100 including at least one layer of the organic frame 100, the organic frame 100 including at least one core-embedded cavity 120, at least one metal pillar 130; an electronic component 300 vertically attached in the core-embedded cavity 120, the electronic component 300 including an upper electrode 310 and a lower electrode 320 respectively located at an upper portion and a lower portion of the core-embedded cavity 120; a wiring layer 500 covering the upper and lower surfaces of the organic frame 100 and communicating with the upper electrode 310, the lower electrode 320 and the metal pillar 130; and a dielectric layer for connecting the line layer 500 and the organic frame 100.

In an embodiment, the electronic component 300 is vertically attached inside the embedded core cavity 120, the upper electrode 310 and the lower electrode 320 of the electronic component 300 are respectively located at the top and the bottom of the embedded core cavity 120, the circuit layer 500 is respectively disposed on the upper surface and the lower surface of the organic frame 100, and the circuit layer 500 is respectively communicated with the upper electrode 310 and the lower electrode 320 of the electronic component 300, the size and the number of the embedded core cavities 120 can be adjusted according to the size, the model and the number of the electronic component 300, the integrated package of the electronic component 300 with the same model on the same layer can be realized by vertically attaching a plurality of electronic components 300 in a plurality of embedded core cavities 120, the integrated package of the electronic component 300 with multiple models on the same layer can also be realized, in addition, in an embodiment of the present application, the vertical package of the electronic component 300 with two layers or more than two layers can be performed through a single-sided or double-sided layer, all falling within the scope of the present application.

Another embodiment of the present application also provides a substrate including the integrated passive device package structure as in any of the above embodiments.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the claims.