阅读说明：本技术 柔性封装结构的制作方法及可穿戴设备 (Manufacturing method of flexible packaging structure and wearable device ) 是由 龚云平 于 2018-07-20 设计创作，主要内容包括：本发明还提供了一种柔性封装结构的制作方法,该方法包括如下步骤：在功能元器件外包覆包覆层,形成功能模块；通过柔性排线实现各所述功能模块之间的电性连接,形成功能结构；提供封装膜,在所述封装膜上形成有多个形状与所述功能模块相适应的容置槽；将所述功能结构固定于所述封装膜上,使所述功能模块设置于所述容置槽内。由该柔性封装结构的制作方法制作的柔性封装结构能够应用于规模化生产之中,柔性较好、成本较低、可靠性较强、制造难度低。(The invention also provides a manufacturing method of the flexible packaging structures, which comprises the following steps of coating a coating layer outside a functional component to form functional modules, realizing electrical connection among the functional modules through flexible flat cables to form the functional structures, providing a packaging film, forming a plurality of accommodating grooves with the shapes matched with the functional modules on the packaging film, fixing the functional structures on the packaging film, and enabling the functional modules to be arranged in the accommodating grooves.)

1, manufacturing method of flexible packaging structure, characterized in that the method includes the following steps:

coating a coating layer outside the functional component to form a functional module;

the electrical connection among the functional modules is realized through flexible flat cables to form a functional structure;

providing a packaging film, wherein a plurality of accommodating grooves with the shapes matched with the functional modules are formed on the packaging film;

and fixing the functional structure on the packaging film to enable the functional module to be arranged in the accommodating groove.

2. The method of claim 1, further comprising attaching an additional encapsulant layer to the flex cable on a side away from the functional module.

3. The method of claim 1, wherein the encapsulation layer is attached to the side of the flex cable away from the functional module or is formed directly on the side of the flex cable away from the functional module.

4. The method of manufacturing a flexible package structure of claim 1, wherein: and an adhesive layer is further arranged on the inner side wall of the accommodating groove and/or the surface of the functional module, and the functional module is fixed on the packaging film through the adhesive layer.

5. The method of claim 1, wherein the flex cable comprises a cable carrier and a conductive interconnection layer disposed on the cable carrier, and the conductive interconnection layer is disposed on the cable carrier near sides of the functional modules when the flex cable is connected between the functional modules.

6. The method of manufacturing a flexible package structure of claim 5, wherein: the stretchable range of the conductive interconnection layer is 20% -350%.

7. The method for manufacturing a flexible package structure according to claim 1, wherein or more functional components are provided in the same functional modules.

8. The method of claim 1, wherein each of the functional modules is disposed on a same side of the flex cable, and the side of the flex cable away from the functional module is covered by another encapsulation layer formed by encapsulation films.

9. The method of manufacturing a flexible package structure of claim 1, wherein: the surface of the packaging film is recessed downwards to form a recessed part, and the accommodating groove is formed at the bottom of the recessed part.

A wearable device of , wherein the wearable device comprises a flexible packaging structure, and the flexible packaging structure is manufactured by the manufacturing method of the flexible packaging structure of any of claims 1 to 9.

Technical Field

The invention relates to the field of semiconductor system-in-package, in particular to a manufacturing method of flexible packaging structures and wearable equipment with the flexible packaging structures.

Background

In recent years, wearable equipment is more and more popular, and the wearable equipment is more and more applied to soldier field battle or training, athlete training, physical monitoring of exercisers, health monitoring and the like. In order to collect information more accurately, how to make the wearable device flexible so as to be closer to the curve of the human body when in use becomes a content of major concern for various large manufacturers and laboratories. The flexibility of the wearable device is mainly limited by the flexibility of the component packaging architecture on the wearable device.

At present, in the technical field of flexible electronics, the manufacturing process technology of flexible electronic devices (such as IC devices, resistance-capacitance elements, batteries and sensors) is not mature, and the flexible electronic devices cannot be applied to commercial industrialization and can be manufactured into flexible electronic products in an integrated mode. The existing system integration packaging manufacturing technology based on SMD components on the flexible FPC has relatively complex manufacturing process and is not easy to control quality and yield. The method comprises the following specific steps: for products with ultra-small elements and ultra-small pin pitches, the process requirement for printing solder paste is high in the process of manufacturing the product patches; warping, deformation and the like of the flexible substrate have caused poor problems such as insufficient soldering of a pin pad of a device. In addition, the manufacturing cost of the flexible FPC is high, and the difficulty of the injection molding and packaging process of the flexible substrate after the surface component patch is assembled is high due to the problems of warping, uneven surface, assembly precision and the like.

Disclosure of Invention

The flexible packaging structure manufactured by the manufacturing method of the flexible packaging structure can be applied to large-scale production, and is good in flexibility, low in cost, high in reliability and low in manufacturing difficulty.

The invention also provides a manufacturing method of the flexible packaging structures, which comprises the following steps:

coating a coating layer outside the functional component to form a functional module;

the electrical connection among the functional modules is realized through flexible flat cables to form a functional structure;

providing a packaging film, wherein a plurality of accommodating grooves with the shapes matched with the functional modules are formed on the packaging film;

and fixing the functional structure on the packaging film to enable the functional module to be arranged in the accommodating groove.

, fixing the functional structure on the packaging film, the method further includes covering a packaging layer formed by another packaging film on the side of the flex cable away from the functional module.

, the packaging layer is adhered and fixed on the side of the flexible flat cable far away from the functional module, or the packaging layer is directly formed on the side of the flexible flat cable far away from the functional module.

, an adhesive layer is further provided on the inner side wall of the receiving groove and/or the surface of the functional module, and the functional module is fixed on the packaging film through the adhesive layer.

, the flex cable includes a cable carrier and a conductive interconnection layer disposed on the cable carrier, and when the flex cable is connected between the functional modules, the conductive interconnection layer is disposed on the cable carrier near the side of the functional modules.

, the conductive interconnect layer is stretchable in the range of 20% -to 350%.

, or more functional components are arranged in the same functional modules.

, each functional module is disposed on the same side of the flex cable, and the side of the flex cable away from of the functional module is covered by another encapsulation layer formed by an encapsulation film.

, a recess is formed on the surface of the packaging film and is recessed downwards, and the receiving groove is formed at the bottom of the recess.

The invention also provides wearable devices, which comprise a flexible packaging structure, wherein the flexible packaging structure is manufactured by the manufacturing method of the flexible packaging structure provided by the invention.

In summary, in the present invention, the functional components are hard packaged by coating the coating layer on the functional components to form the functional modules, and then the functional modules are connected between the functional modules through the flexible flat cable, which eliminates the need for a substrate for fixing the functional modules in terms of functional structure, and meanwhile, the functional components, such as IC Devices, resistance-capacitance elements, batteries, sensors, etc., are not required to be Mounted on the flexible substrate together according to the existing SMD (Surface Mounted Devices) technique, which greatly improves the warpage, deformation, etc. of the flexible substrate, and reduces the cost.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic cross-sectional view of a flexible packaging structure according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the functional structure of fig. 1.

Fig. 3 is a schematic top view of the functional structure of fig. 1.

Fig. 4 is a schematic cross-sectional structure diagram of the encapsulation film in fig. 1.

Fig. 5a to fig. 5e are schematic cross-sectional structures of steps in the manufacturing method of the flexible packaging structure provided by the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention for achieving the intended objects, the following detailed description is given in conjunction with the accompanying drawings and preferred embodiments.

The invention provides flexible packaging structures, a manufacturing method of the flexible packaging structures and wearable equipment with the flexible packaging structures.

Fig. 1 is a schematic cross-sectional structure of a flexible package structure according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional structure of the functional structure in fig. 1, fig. 3 is a schematic top-view structure of the functional structure in fig. 1, and fig. 4 is a schematic cross-sectional structure of the package film in fig. 1. The flexible packaging structure provided by the invention comprises a functional structure 10 and a packaging film 21, wherein the functional structure 10 is fixed on the packaging film 21, the functional structure 10 comprises a functional module 11 and a flexible flat cable 12 connected between the functional modules 11, the functional module 11 comprises a functional component 111 and a coating layer 112, the coating layer 112 is coated outside the functional component 111, a containing groove 211 is formed on the packaging film 21, and when the functional structure 10 is fixed on the packaging film 21, the functional module 11 is arranged in the containing groove 211.

In the present embodiment, the functional component 111 is hard-packaged by coating the coating layer 112 on the functional component 111 to form the functional module 11, and then the functional component 111 is connected between the functional modules 11 through the flexible flat cable 12, which eliminates a substrate for fixing the functional module 11 on the functional structure 10, and the functional component 111, such as an IC device, a resistance-capacitance element, a battery, a sensor, etc., is not required to be Mounted on the flexible substrate together according to the existing SMD (Surface Mounted device) technique, which greatly reduces the probability of occurrence of problems such as warpage and deformation of the flexible substrate, and reduces the cost, meanwhile, since the coating layer 112 is provided outside the functional component 111, the functional modules 11 are connected through the flexible flat cable 12, which is advantageous for improving the reliability of connection between the functional modules 11, and reducing the connection difficulty, is advanced, since the functional structure 10 and the encapsulation film 21 are separately manufactured, and then assembled at , which reduces the control of the precision during packaging, and also facilitates solving the problems generated during injection molding and packaging, and further, since the functional component 111 is more easily manufactured by the coating layer 112, and the flexible flat cable 12, and the flexible flat cable packaging structure can be better, and the flexible flat cable packaging structure can be applied to the flexible packaging structure.

, in this embodiment, functional components 111 may be disposed in the same functional modules 11, and it is understood that in other embodiments, a plurality of functional components 111 may be disposed in the same functional modules 11. to facilitate the connection of the flexible flat cable 12 to the functional modules 11, an I/O port 113 for connecting the flexible flat cable 12 to the functional components 111 in the cover layer 112 is further formed on the cover layer 112.

The flexible flat cable 12 includes a flat cable carrier 121 and a conductive interconnection layer 122 disposed on the flat cable carrier 121, wherein when the flexible flat cable 12 is connected between the functional modules 11, the conductive interconnection layer 122 is closer to the functional modules 11 than the flat cable carrier 121, so as to facilitate connection and protection of the conductive interconnection layer 122.

In this embodiment, the flat cable carrier 121 may be a conventional flat cable carrier 121 made of flexible material such as PI or PET, or may be a flat cable carrier 121 made of flexible material such as PDMS and silicone with fixed extensibility of . the conductive interconnection layer 122 needs to have fixed flexibility and stretchable extensibility of in order to make the flexible package structure more flexible, and preferably, the stretchable range of the conductive interconnection layer 122 is 20% to 350%.

The conductive interconnection layer 122 can be connected to the I/O ports 113 of the functional modules 11 by hot-pressing soldering, conductive adhesive bonding, ACF adhesive die pressing bonding, or the like by a Hotbat soldering machine, so as to interconnect the functional modules 11.

In order to facilitate the fixing of each functional module 11 in the receiving groove 211 of the encapsulation film 21, in this embodiment, an adhesive layer 212 is further disposed between the receiving groove 211 and the surface of the functional module 11, and the functional module 11 is fixed in the corresponding receiving groove 211 through the adhesive layer 212, the adhesive layer 212 may be disposed on the surface of the functional module 11 and/or on the inner wall of the receiving groove 211 in advance through processes such as coating, dispensing, and the like, for example, on the bottom surface.

, in this embodiment, each functional module 11 is disposed on the same side of the flexible flat cable 12, when the functional structure 10 is fixed on the encapsulation film 21, the encapsulation layer 22 formed by another encapsulation film is further covered on the side of the flexible flat cable 12 away from the functional module 11, and the encapsulation layer 22 and the encapsulation film 21 seal the functional structure 10.

In order to facilitate the installation of the encapsulation layer 22, a recess 213 is formed on the surface of the encapsulation film 21 and is recessed downward, the receiving groove 211 is formed at the bottom of the recess 213, and when the encapsulation layer 22 is covered on the functional structure 10, the encapsulation layer 22 is installed in the recess 213.

In the embodiment, the encapsulation layer 22 may be attached to the side of the flex cable 12 away from the functional module 11 by a mounting process to complete the encapsulation of the functional structure 10, in other embodiments of the invention, the encapsulation layer 22 may also be directly formed on the side of the flex cable 12 away from the functional module 11 by a molding process, a coating process, or the like.

In summary, in the present embodiment, through the structure of the functional modules 11, the connection manner between the functional modules 11, and the improvement of the packaging form, the flexible packaging structure can be applied to mass production, and has better flexibility, lower cost, stronger reliability, and low manufacturing difficulty.

Fig. 5a to 5e are schematic cross-sectional structure diagrams of steps in a manufacturing method of a flexible package structure provided by the present invention, as shown in fig. 5a to 5e, the present invention further provides a manufacturing method of flexible package structures, the manufacturing method includes the following steps:

coating a coating layer 112 outside the functional component 111 to form a functional module 11; (see FIG. 5a)

The electrical connection among the functional modules 11 is realized through the flexible flat cable 12 to form a functional structure 10; (see FIG. 5b)

Providing an encapsulation film 21, wherein a plurality of accommodating grooves 211 which are matched with the functional modules 11 in shape are formed on the encapsulation film 21; (see FIG. 5c)

The functional structure 10 is fixed on the packaging film 21, so that the functional module 11 is disposed in the receiving cavity 211. (see FIG. 5d)

In addition, in the embodiment, after the coating layer 112 is added to the functional component 111, modularization of the functional module 11 is facilitated, improvement of a connection mode of the flexible flat cable 12 is further performed, and improvement of an assembly mode of the flexible flat cable 12 and the flexible substrate are further performed, so that the volume of the flexible packaging structure can be greatly reduced, and the flexible packaging structure has better flexible packaging structure.

, in the embodiment, each functional module 11 is disposed on the same side of the flexible flat cable 12, and after the functional structure 10 is fixed on the encapsulation film 21, the method further includes covering the encapsulation layer 22 formed by another encapsulation film on the side of the flexible flat cable 12 away from the functional module 11 (see fig. 5e)

In another embodiment, the encapsulation layer 22 may be directly formed on the side of the flex cable 12 away from the functional module 11 by injection molding, coating, dispensing, etc. to improve the sealing effect and the adhesion performance.

The method further includes providing an adhesive layer 212 on an inner sidewall of the receiving groove 211 and/or a surface of the functional module 11, and fixing the functional module 11 to the encapsulation film 21 through the adhesive layer 212.

The present invention further provides wearable devices, which include the flexible packaging structure provided by the present invention, and please refer to the prior art for other technical features of the wearable device, which are not described herein again.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.