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随着对晶体管可靠性的要求逐渐严格,管芯底面和底盘之间对焊接的牢固性及形成良好的欧姆接触已经成为一个不容忽视的问题.为了解决这个问题,国内早已有厂家采用了超声烧焊技术,在中小功率管上取得了满意的成果.虽然该技术在国内外有关资料上都曾有过提及,但对其作较完整的论述我们尚未见到.为此,我厂在这方面作了一些工作,并使之在大功率管上获得了应用,同时对该技术未来的发展方向和应值得引起注意的问题进行了较为详细的探讨.
With the increasingly stringent requirements on the reliability of transistors, the firmness of the soldering between the bottom surface of the die and the chassis and the formation of a good ohmic contact have become a problem that can not be ignored.In order to solve this problem, some domestic manufacturers have already adopted ultrasonic burning Welding technology, has achieved satisfactory results in small and medium-power tube.Although the technology has been mentioned in the relevant information at home and abroad, but a more complete discussion of it we have not yet seen.To this end, I plant here And made some application in high-power tube. At the same time, the future development of the technology and the issues worth attention should be discussed in detail.