Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making electrical device
Patent
1992-03-20
1995-01-17
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making electrical device
430315, 430318, 430323, 430324, 1566591, 156664, 156666, G03C 500
Patent
active
053825055
ABSTRACT:
The surface of a metal foil to be used as an intermediate layer in printed circuit boards is chemically roughened. In one embodiment, fine depressions are etched out of the metal coating. In another embodiment, protuberances are plated thereon. The use of the method permits the use of the foil in the production of multilayer printed circuit boards with coatings having different thermal expansion characteristics and improves the adhesion with the next conductor layer applied thereto to a significant extent and prevents delamination.
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Martinelli Marco
Schmidt Walter
Bowers Jr. Charles L.
Dyconex AG
Farley Walter C.
Pasterczyk J.
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