C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
49/92.5
C03C 4/14 (2006.01) C03C 10/00 (2006.01) C03C 10/04 (2006.01) C03C 10/16 (2006.01) C03C 23/00 (2006.01) H05K 3/10 (2006.01)
Patent
CA 1202488
Abstract of the Disclosure This invention is directed to the production of composite articles composed of a substrate consisting of a machinable glass-ceramic and an integral, electrically-conductive surface layer consisting of metallic copper and/or silver. The inventive articles are prepared by heat treating precursor glass bodies containing copper and/or silver ions to grow fluormica crystals therein, thereby producing glass-ceramics, and to cause migration of the copper and/or silver ions to the surface thereof which are reduced to metallic copper and/or silver via heat treating in a reducing atmosphere. Where desired, holes can he bored, drilled, or punched into the glass ceramic prior to exposure to the reducing heat treatment such that, upon heat treatment in a reducing environment, the sides of the holes will become metal plated.
420754
Corning Glass Works
Gowling Lafleur Henderson Llp
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