IMMERSION SOLDER LEVELING BY ULTRASONIC CAVITATION

    公开(公告)号:CA1002815A

    公开(公告)日:1977-01-04

    申请号:CA185430

    申请日:1973-11-09

    Applicant: IBM

    Abstract: A method and apparatus utilizing ultrasonic cavitation to level molten solder on wetted surfaces to a controlled and a predetermined thickness. By immersing a surface soldered substrate, printed circuit card, printed circuit board or the like into a heated tank containing a liquid glycerol at approximately 10 DEG C. to 40 DEG C. above the melting point of the solder, it is possible to selectively and ultrasonically cavitate solder from the soldered surfaces to achieve uniform solder thickness.

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