Patent ID: 7931249
Filing Date: 2011-04-26
Classification: H05K

Abstract:
1. A method of modifying glass material mold plates having upper surfaces, wherein mold pits are etched in the upper surfaces of said mold plates, said mold pits having initially sharp peripheral edges; said mold plates being utilized in implementing injection molded solder processing, said method comprising: wherein said mold plates are subjected in at least the upper surface regions thereof to a heat treatment so as to cause the initially sharp peripheral edge of each of said mold pits to deform into said rounded-off or smoothly radiused configuration extending into said upper surfaces of the mold plates; wherein said mold plates have backside surfaces thereof supported on a substrate having a planar surface in contact therewith during at least the heat treatment of said glass material mold plates; and wherein the planar surface area of said substrate and the backside surfaces of said mold plates have a coating layer of a material interposed so as to inhibit sticking between said mold plates and said substrate; said coating layer being selected from the group of materials consisting of graphite, and a refectory kiln wash.