Ball grid array (BGA) package structure

Abstract

The invention discloses a ball grid array (BGA) package structure, which is characterized in that wire carriages are utilized to support corresponding wires so as to prevent the wires from collapsing in a vertical direction, and effectively separate the wires in an upper layer from the wires in a lower layer. Meanwhile, the wire carriages are provided with rough insulating surfaces, and can further prevent the wires from deviating and being rushed in a horizontal direction. Therefore, the structure can effectively avoid the wires in any two adjacent layers or the left and right wires from generating contact short circuit.

Description

technical field [0001] The present invention relates to a ball grid array packaging structure, in particular to a ball grid array packaging structure that utilizes a wire support frame to effectively avoid contact short-circuiting of adjacent wires. Background technique [0002] Nowadays, in order to meet the needs of various high-density packaging, the semiconductor packaging industry has gradually developed various types of packaging designs, among which various system in package (SIP) design concepts are often used to construct high-density packaging products. Generally speaking, system-in-package can be classified into a multi-chip module (MCM), a package on package (POP), a package in package (PIP), and the like. The multi-chip module (MCM) refers to the arrangement of several chips on the same substrate. After the chips are arranged, the same packaging colloid is used to embed all the chips, and they can be subdivided into stacked chips according to the arrangement of ...

AI Technical Summary

Problems solved by technology

[0005] However, the BGA packaging structure still has the following problems in the actual wire bonding and molding process, for example: when the wire bonding, when the length of the first wire 13 and / or the second wire 14 is too long Or when the arrangement is too dense, the adjacent upper and lower layer wires are likely to accidentally contact each other due to defects such as line collapse, which will cause short circuit problems

Even if no contact short circuit is caused during wiring, it is still easy to cause punching defects of adjacent left and right wires (or upper and lower layer wires) due to the flow impact force of the encapsulant 16 during the subsequent molding process and contact short circuit

As a result, it will be necessary to rework (rework). If there are too many short-circuited positions, the product will be scrapped, which will greatly affect the packaging yield (yield), and relatively increase the production cost and reduce production efficiency.

In order to overcome the above problems, some packaging factories also increase the distance between the upper and lower layer wires or the distance between the left and right wires to prevent wire collapse or punching defects. However, this is not conducive to saving the cost of wire materials, and is also not conducive to reducing the overall package length and width. High size, increase wire density or increase the number of stacked layers of chips

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