AAQFN package part using electroplating process and manufacture process thereof

Abstract

The invention discloses an AAQFN package part using an electroplating process and a manufacture process thereof. The package part is mainly composed of a copper lead framework, adhesive tape glue, a chip, a bonding wire, a plastic package material, a solder mask layer and a solder ball. The copper lead is etched to be adhered with the chip through the adhesive tape glue, the chip is connected with a pin of the copper lead framework through the bonding line and plastically packed by the plastic package materials, the solder mask layer is filled in a pin gap etched at the bottom of the copper lead framework, and the solder ball is electroplated on the pin. The manufacture process mainly comprises the following steps of semi etching a copper framework, thinning a wafer, scratching a wafer, bonding the chip, press soldering, plastically packing, framing, etching at the back, brushing the solder mask layer at the back, electroplating the solder ball and cutting. The manufacture process saves package cost and improves electric performance and product reliability.

Description

Technical field [0001] The invention involves the field of semiconductor packaging technology, which is specifically a AAQFN packaging part and its production process that uses electroplating processes. Background technique [0002] With the continuous development of technology, electronic packaging must not only provide chip protection, but also meet the requirements of increasing performance, reliability, heat dissipation, and power distribution at a certain cost.The number of pins, faster clock frequency and better power distribution. [0003] The traditional QFN packaging method is limited by the framework. The interconnection line of I / 0 PAD is fixed. The number of pins is small and the spacing is large. [0004] On the basis of mature etching technology, AAQFN packaging starts from the aspects of frame design, material selection, pad structure optimization, etc., establish a sound packaging process technology, constantly adjust and optimize, break through the narrow spacing...

AI Technical Summary

Problems solved by technology

[0005] However, the traditional AAQFN packaging process mainly uses stencil brushing solder paste, and then reflows the solder paste, which not only increases the packaging cost to a certain extent, but also cumbersome packaging process

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