Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1989-12-08
1991-07-09
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
428209, 428901, 361397, B32B 900
Patent
active
050304992
ABSTRACT:
The present invention eliminates the release of vapors from an adhesive which bonds an organic multilayer substrate to a ceramic layer. Posts from the organic layer are plated up sufficiently high as to enter holes in the ceramic layer, but not completely penetrate through them. The holes may then be filled with solder, which both seals the holes against the escape of adhesive vapors and makes a good electrical contact with the post. A conductive pad may then be stenciled on top of the solder plug, and the chip or other electric component mounted to the pad. The hole is preferably plated with a conductive material prior to being filled with solder, so that the solder may join the plating with the post. The solder plug is formed by forming a slurry of solder with alcohol, which is squeegeed into the holes and fused under pressure. A solder paste is then stenciled over the fused soldered power and is, itself, fused using the vapor phase. A plurality of interconnection substrates may be formed from a single organic/inorganic panel, broken or sawed apart along score lines.
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Shaheen Joseph M.
Yamaguchi James S.
Evans Elizabeth
Hamann H. Fredrick
Montanye George A.
Rockwell International Corporation
Ryan Patrick J.
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