Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making electrical device
Patent
1986-11-21
1989-01-03
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making electrical device
430313, 430324, 430328, 430330, G03C 500
Patent
active
047956933
ABSTRACT:
Printed circuit boards having a plurality of circuit layers are produced on a copper-clad substrate by first forming a pattern in a desired configuration to produce the first layer of the printed circuit board, then covering it with an energy-sensitive material comprising a rubber modified epoxy resin, an acrylated epoxy resin and a viscosity modifier; the energy-sensitive material is delineated in a desired pattern and developed to uncover portions of the underlying metallization pattern and the entire substrate is then blanket cured to produce a rigid layer having openings in appropriate places; the openings are metallized and a second copper pattern is produced on the cured polymer by conventional metallization and lithographic techniques. If desired, the process is repeated until a suitable number of copper patterned levels are obtained.
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Ors Jose A.
Small, Jr. Richard D.
American Telephone and Telegraph Company, AT&T Technologies, Inc
Birnbaum Lester H.
Hamilton Cynthia
Michl Paul R.
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