Patent ID: 6506448
Filing Date: 2003-01-14
Classification: B22F,B23K,H01L,H05K

Abstract:
A method of chemically coating a solder sphere by a vaporization process comprising steps of:(a) providing a first vapor-tight chamber with a coating solution contained therein which comprises a volatile organic solvent and at least one solute; (b) providing a plurality of solder spheres contained in a second chamber; (c) immersing said second chamber into said first vapor-tight chamber, wherein said second chamber includes a plurality of apertures to place said second chamber in fluid communication with said first vapor-tight chamber, under conditions sufficient to allow for adherence of said solutes to said solder spheres contained therein; (d) removing said second chamber from said first vapor-tight, chamber; and (e) immersing said second chamber into a third vapor-tight chamber to remove by vaporization said volatile organic solvent, thereby coating said solder spheres.