Metal fusion bonding – Process – Preplacing solid filler
Patent
1996-08-01
1999-08-17
Heinrich, Samuel M.
Metal fusion bonding
Process
Preplacing solid filler
228254, 228256, 2282481, 427 96, B23K 300
Patent
active
059381060
ABSTRACT:
A method and apparatus is disclosed for applying solder to a substrate which has a predetermined pattern of receiving pads thereon and forming solder balls from the applied solder. A conveyor is provided having a support member and a continuous metering member. The metering member has openings thereon arranged in the same preselected pattern as the solder receiving pads on the substrate. The substrate is moved into contact with the support member and the metering member, the openings in the metering member being in alignment with the solder receiving pads of the substrate. A container of solder is provided which supplies solder to the openings. The solder may be in liquid form, or in paste form, or in the form of solid solder balls. The applied solder, if in the form of paste or solid balls is melted. Thereafter, the solder is solidified on the pads to form solder balls, and the substrate is discharged from the conveyor with the solidified solder balls thereon.
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Heinrich Samuel M.
Hogg William N.
International Business Machines - Corporation
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