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    • 9. 发明授权
    • Method for soldering DPAK-type electronic components to circuit boards
    • 将DPAK型电子部件焊接到电路板的方法
    • US06168070A
    • 2001-01-02
    • US09172047
    • 1998-10-14
    • Peter Joseph Sinkunas
    • Peter Joseph Sinkunas
    • B23K3100
    • H05K3/341H01L2224/05553H01L2224/48091H01L2224/48247H01L2224/48472H05K3/3494H05K2201/10166H05K2201/10969H05K2203/0405H05K2203/107Y02P70/613H01L2924/00014H01L2924/00
    • There is disclosed herein a method for soldering an electronic component 10 having a heatspreader 14 on a bottom surface thereof and at least one lead 18 (e.g., a DPAK-type component) to a circuit board 30 having a heatspreader mounting pad 32 and at least one lead mounting pad 34, comprising the steps of: (a) depositing solder paste 36 on the heatspreader mounting pad 32 and on each of the at least one lead mounting pad 34; (b) placing the electronic component 10 on the circuit board 30 such that the heatspreader 14 rests atop the heatspreader mounting pad 32 and each lead 18 rests atop a respective one of the at least one lead mounting pad 34; (c) directing a laser energy beam 42 from a diode laser 40 at the heatspreader 14 and/or at the heatspreader mounting pad 32 for a first predetermined length of time, thereby heating the solder paste 36 on the pad 32; and (d) continuing to direct the laser energy beam 42 at the heatspreader/pad 14/32 for a second predetermined length of time while simultaneously feeding a predetermined amount of flux-core wire solder 50 into the laser energy beam 42 proximate the heatspreader 14, such that the wire solder 50 melts and flows onto at least one of the heatspreader 14 and the heatspreader mounting pad 32.
    • 这里公开了一种将其底面上具有散热器14的电子部件10和至少一个引线18(例如,DPAK型部件)焊接到具有散热器安装焊盘32并且至少具有散热器安装焊盘32的电路板30的方法 一个引线安装焊盘34,包括以下步骤:(a)将焊膏36沉积在散热器安装焊盘32上和每个至少一个引线安装焊盘34上; (b)将电子部件10放置在电路板30上,使得散热器14搁置在散热器安装焊盘32的顶部,并且每个引线18位于至少一个引线安装焊盘34中的相应一个之上; (c)将来自二极管激光器40的激光能量束42引导到散热器14和/或在散热器安装垫32上第一预定长度的时间,从而加热焊盘32上的焊膏36; 和(d)继续将激光能量束42引导到散热器/焊盘14/32处第二预定长度的时间,同时将预定量的磁芯焊丝50馈送到靠近散热器14的激光能量束42中 使得焊丝50熔化并流到散热器14和散热器安装焊盘32中的至少一个。