微电子器件是由芯片和封装通过封装工艺组合而成,因此,封装是微电子器件的两个基本组成部分之一。封装为芯片提供信号和电源的互连,提供散热通路和机械、环境保护。随着微电子技术的发展,微电子器件的高频性能、热性能、可靠性和成本等越来越受封装性能的制约。因此,封装对于器件相当于人的皮肤、手脚对于人体,是人体的基本组成部分,而不是过去人们所说的衣服对于人的作用,因为衣服对于人来说主要是环境保护(冷热风雨)和装饰。这点更可从 MPU(微处理器)和 ASIC(专用集成电路)的发展中看出,对于 MPU 几乎是一代新产品需要一种新封装。早期的 MPU如8086,引出端数为40,可以用 DIP(双列直插式封装)。到386时,引线数为80,就需要用 Microelectronic devices are a combination of chip and package through the packaging process, so the package is one of the two basic components of microelectronic devices. The package provides the signal and power interconnect for the chip, providing thermal access and mechanical and environmental protection. With the development of microelectronic technology, the high-frequency performance, thermal performance, reliability and cost of microelectronic devices are more and more restricted by the packaging performance. Therefore, the package is equivalent to human skin device, hands and feet for the human body, is an essential part of the human body, rather than people in the past that the role of clothes for people, because clothes for people mainly environmental protection (hot and cold weather) And decoration. This is further evidenced by developments in MPUs (Microprocessors) and ASICs (Application Specific Integrated Circuits) that require a new package for almost a generation of MPUs. Early MPU, such as the 8086, the number of leads 40, you can use DIP (dual in-line package). To 386, the number of leads is 80, you need to use