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由于目前塑料封装晶体三极管大批量生产,提高中测合格率后,能节约大批人力、物力,从而对降低产品成本,加强产品对市场的竟争力有着重大意义和贡献,必须引起足够的重视。 我们认为一般小功率塑封管中测合格率(η=合格品数/成品管芯总数×100％;合格品指成品管经过晶体管图示仪检测有V-I特性曲线的)高低,除了与管芯有一定联系外,主要与中后道工序中的烧结、热键压、内涂等几道工序有着较密切的关系。采用合理的工艺改进方法;与提高中测合格率是休戚相关的。 1.管芯装架
Due to the mass production of plastic encapsulated transistor, improving the passing rate of the mid-test can save a great deal of manpower and material resources, which is of great significance and contribution to reducing the product cost and enhancing the market competitiveness of products. We believe that the general low-power plastic pipe in the pass rate (η = number of qualified products / the total number of finished products × 100%; qualified product refers to the finished product through the transistor indicator VI curve), except with a certain die Contact, mainly in the middle and back of the process of sintering, hot key pressure, Tu Tu and other processes have a closer relationship. The use of reasonable process improvement methods; and improve the pass rate is bound to be related. Die mount