阅读说明：本技术 一种ssd堆叠封装结构及其制备方法 (SSD (solid State disk) stacked packaging structure and preparation method thereof ) 是由 王蕊 熊涛 马晓建 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种SSD堆叠封装结构及其制备方法,其特征在于,包括：基板；控制芯片,所述控制芯片贴装在所述基板上,且控制芯片与基板电性连接；间隔件,所述间隔件下表面具有容置空间,间隔件贴装在所述基板上,且控制芯片置于所述容置空间内；存储芯片,所述存储芯片贴装在间隔件上表面；存储芯片通过键合线与基板电性连接；及塑封体,所述塑封体包覆基板、间隔件、存储芯片和键合线。该封装结构通过U型的Spacer保护控制芯片,防止裂片,小体积便于实现并提高了封装质量。(The invention discloses an SSD stacking and packaging structure and a preparation method thereof, which are characterized by comprising the following steps: a substrate; the control chip is attached to the substrate and electrically connected with the substrate; the lower surface of the spacer is provided with an accommodating space, the spacer is attached to the substrate, and the control chip is arranged in the accommodating space; a memory chip mounted on an upper surface of the spacer; the memory chip is electrically connected with the substrate through the bonding wire; and the plastic package body wraps the substrate, the spacing piece, the memory chip and the bonding wire. The packaging structure protects the control chip through the U-shaped Spacer, so that the split is prevented, and the small volume is convenient to realize and improves the packaging quality.)

1. An SSD stacked package structure, comprising:

a substrate (1);

the control chip (5) is attached to the substrate (1), and the control chip (5) is electrically connected with the substrate (1);

the spacer (6) is provided with an accommodating space, the spacer (6) is attached to the substrate (1), and the control chip (5) is arranged in the accommodating space;

a memory chip (9), the memory chip (9) being attached to the spacer (6); the memory chip (9) is electrically connected with the substrate (1) through the bonding wire (7);

and the plastic package body (8), wherein the plastic package body (8) covers the substrate (1), the spacer (6), the memory chip (9) and the bonding wire (7).

2. The SSD stacked package structure of claim 1, wherein the substrate (1) has substrate traces (4) and solder balls (2) on a surface thereof, and the control chip (5) and the memory chip (9) are electrically connected to the substrate traces (4).

3. The SSD stacked package structure of claim 2, wherein the substrate (1) has substrate holes (3) formed therein, the substrate holes (3) are filled with a conductive material, the solder balls (2) are disposed on the bottom of the substrate (1), and the solder balls (2) are electrically connected to the conductive material and/or the substrate lines (4).

4. The SSD stacked package structure of claim 1, wherein the accommodating space of the spacer (6) is a U-shaped groove, and the width of the U-shaped groove is greater than the length of the control chip (5).

5. An SSD stack package structure according to claim 1, characterized in that multiple layers of memory chips (9) are stacked on the spacer (6).

6. The SSD stacked package structure of claim 1, wherein the spacer (6) is made of metal.

7. A preparation method of an SSD stacked package structure is characterized by comprising the following steps:

forming an accommodating space on the lower surface of the spacer (6);

a control chip (5) is pasted on the substrate (1), so that the control chip (5) is electrically connected with the substrate (1);

attaching a spacer (6) with an accommodating space on the substrate (1) and placing the control chip (5) in the accommodating space;

mounting a memory chip (9) on the upper surface of the spacer (6);

the spacer (6) is attached to the substrate (1), and the control chip (5) is arranged in the accommodating space; the circuit connection is realized through a routing mode;

and finally, the substrate (1), the spacer (6), the memory chip (9) and the bonding wire (7) are coated by a plastic package body (8) for plastic package.

8. The method for preparing the SSD stacked package structure of claim 1, wherein the spacer (6) is formed into a receiving space of a U-shaped groove structure by etching and grooving.

Technical Field

The invention belongs to the technical field of storage chip packaging, and relates to an SSD (solid State disk) stacked packaging structure and a preparation method thereof.

Background

Ssd (solid State drives) stack package trends are thin package thickness, small volume, high integration level, and large capacity, and for ultra-thin chip packages, reliability and high integration level of multi-chip stack become a major trend of packages, which is a challenge for technicians in this industry.

For SSD packaging, the control chip and the memory chip are typically packaged together. Currently, there are 3 types of SSD packages: firstly, a control chip is independently placed on one side, and a storage chip is arranged on the other side; secondly, placing the control chip on a bottom layer, and stacking and sealing the storage chip on the bottom layer; and thirdly, the control chip is embedded in the substrate.

These three separate problems currently exist: the realization is convenient, and the volume is large; secondly, splitting is a big problem; thirdly, the control chip size is limited, and the process difficulty is high.

Disclosure of Invention

The invention aims to overcome the defect of large volume of SSD stacked package in the prior art and provides an SSD storage chip package structure and a preparation method thereof. The packaging structure protects the control chip through the U-shaped spacer, prevents the split, is convenient to realize in small volume and improves the packaging quality.

In order to achieve the purpose, the invention adopts the following technical means:

an SSD stacked package structure, comprising:

a substrate;

the control chip is attached to the substrate and electrically connected with the substrate;

the spacer is provided with an accommodating space, the spacer is attached to the substrate, and the control chip is arranged in the accommodating space;

a memory chip mounted on the spacer; the memory chip is electrically connected with the substrate through the bonding wire;

and the plastic package body wraps the substrate, the spacing piece, the memory chip and the bonding wire.

The surface of the substrate is provided with a substrate circuit and solder balls, and the control chip and the storage chip are electrically connected with the substrate circuit.

The substrate is provided with a substrate hole, conductive materials are filled in the substrate hole, the solder ball is arranged at the bottom of the substrate, and the solder ball is electrically connected with the conductive materials and/or the substrate circuit.

The accommodation space of the spacer is a U-shaped groove, and the width of the U-shaped groove is larger than the length of the control chip.

A plurality of layers of memory chips are stacked on the spacer.

The spacer is made of metal.

A preparation method of an SSD stacked packaging structure comprises the following steps:

forming an accommodating space on the lower surface of the spacer;

a control chip is pasted on the substrate 1, so that the control chip is electrically connected with the substrate;

attaching a spacer with an accommodating space on the substrate, and placing the control chip in the accommodating space;

mounting a memory chip on the upper surface of the spacer;

the distance piece is attached to the substrate, and the control chip is arranged in the accommodating space; the circuit connection is realized through a routing mode;

and finally, the plastic package body wraps the substrate, the spacer, the memory chip and the bonding wire for plastic package.

The spacing piece adopts the mode of etching fluting to form the accommodation space of U type groove structure.

Compared with the prior art, the invention has the following advantages:

the SSD storage chip packaging structure comprises the spacer with the accommodating space, the control chip and the storage chip are separated through the U-shaped spacer, the pressure of an upper chip on the control chip is reduced, the control chip is prevented from cracking, the size of the packaging structure with the control chip placed on one side independently is reduced, the size of the control chip embedded and sealed in the substrate structure is changed, the process difficulty is reduced, the SSD storage chip packaging structure is easy to realize, the yield is high, and the cost is low.

Preferably, the material of the spacer can be selected according to actual needs, and when the spacer is made of a metal material, the electromagnetic interference of the control chip can be reduced, and meanwhile, the heat dissipation of the upper-layer stacked memory chip is enhanced, so that the heat dissipation and conduction effects are achieved.

Drawings

FIG. 1 is a schematic view of the bottom plate structure of the present invention;

FIG. 2 is a schematic diagram of a spacer formed by etching a slot to form a U-shaped slot;

FIG. 3 includes a schematic view of a provided substrate and a primary upper core;

FIG. 4 is a schematic diagram of secondary coring based on FIG. 3;

fig. 5 is a schematic diagram of adding the rest of the crystal grains on the basis of fig. 4.

In the figure, 1: substrate, 2: solder ball, 3: substrate hole, 4: substrate circuit, 5: control chip, 6: spacer, 7: bonding wire, 8: plastic package, 9: a memory chip.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the SSD memory chip package structure of the present invention includes a substrate 1, a control chip 5 is directly mounted on the substrate 1, the control chip 5 is connected to the substrate 1 by bonding, U-shaped spacers 6 (spacers) with different sizes and materials are disposed according to the sizes of the control chip 5 and the memory chip 9, and a plurality of memory chips are stacked on the spacers 6. The concrete structure includes:

a substrate 1;

the control chip 5 is attached to the substrate 1, and the control chip 5 is electrically connected with the substrate 1;

the spacer 6, the lower surface of the said spacer 6 has accommodating spaces, the spacer 6 is mounted on said base plate 1, and the control chip 5 is placed in the said accommodating space;

a memory chip 9, wherein the memory chip 9 is attached to the upper surface of the spacer 6; the memory chip 9 is electrically connected with the substrate 1 through the bonding wire 7;

and the plastic package body 8 covers the substrate 1, the spacer 6, the memory chip 9 and the bonding wire 7.

Preferably, the surface of the substrate 1 has a substrate circuit 4 and a solder ball 2, and the control chip 5 and the memory chip 9 are electrically connected to the substrate circuit 4. The substrate 1 is provided with a substrate hole 3, the substrate hole 3 is filled with a conductive material, the solder ball 2 is arranged at the bottom of the substrate 1, and the solder ball 2 is electrically connected with the conductive material and/or the substrate circuit 4.

As a preferred embodiment, the accommodating space of the spacer 6 is a U-shaped groove, and the width of the U-shaped groove is greater than the length of the control chip 5. A plurality of layers of memory chips 9 are stacked on the spacer 6.

As a preferred embodiment, the material of the spacer 6 can be selected according to actual requirements, and when the spacer 6 is made of a metal material, the electromagnetic interference of the control chip 5 can be reduced, and the heat dissipation of the upper stacked memory chip 9 can be enhanced.

The preparation method of the SSD stacked packaging structure comprises the following steps:

forming a containing space on the lower surface of the spacer 6;

a control chip 5 is pasted on the substrate 1, so that the control chip 5 is electrically connected with the substrate 1;

attaching a spacer 6 having an accommodating space on the substrate 1 such that the control chip 5 is placed in the accommodating space;

attaching the memory chip 9 to the upper surface of the spacer 6;

the spacer 6 is attached to the substrate 1, and the control chip 5 is arranged in the accommodating space; the circuit connection is realized through a routing mode;

and finally, the plastic package body 8 covers the substrate 1, the spacer 6, the memory chip 9 and the bonding wire 7 for plastic package.

The spacer 6 forms an accommodating space of a U-shaped groove structure by adopting an etching grooving mode.