所谓塑封晶体管是相对于金属或陶瓷等外壳封装半导体器件而言的。它采用某种稳定的可塑性材料,如硅酮、环氧、改性环氧、聚酯、酚醛等多种树脂或聚丁烯材料做器件的外包封。而功率晶体管因为其工作电流大,耗散功率大,以往多采用金属壳封 The so-called plastic transistor is relative to the metal or ceramic shell package semiconductor devices. It uses a stable plastic material, such as silicone, epoxy, modified epoxy, polyester, phenolic and other resin or polybutylene material to do the device encapsulation. The power transistor because of its large operating current, dissipating power, in the past to use metal shell seal