Method and apparatus using colored foils for placing conductive preforms

  • US 6,230,963 B1
  • Filed: 04/03/1997
  • Issued: 05/15/2001
  • Est. Priority Date: 01/28/1997
  • Status: Expired due to Term
First Claim
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1. A method for placing a plurality of conductive preforms on a plurality of electronic pads, the method comprising the steps of:

  • placing a plurality of conductive preforms with relation to a plurality of openings in at least one foil whereby the surface of the foil is treated to differ in color from the conductive preforms, holding a plurality of conductive preforms to a plurality of openings in the at least one foil by providing at least one holding force to the plurality of conductive preforms against a secondary material which covers at least a portion of the openings of the foil;

    applying a tacky media to at least one of the plurality of conductive preforms and the plurality of electronic pads;

    inspecting the plurality of conductive preforms whereby the inspection step is assisted by the color of the foil;

    locating the plurality of conductive preforms at a plurality of electronic pads; and

    placing the plurality of conductive preforms on the plurality of electronic pads.

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