Inventors:
John T. Sprietsma - Hillsboro OR
James V. Noval - Beaverton OR
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
B32B 300
H05K 111
Abstract:
Disclosed is a multilayer (e. g. , 4-layer) printed circuit board and method of manufacture thereof. The multilayer printed circuit board has at least one inner substrate (inner core) that includes a phenolic resin (e. g. , a phenolic resin-laminated paper). Outer insulating layers of the multilayer printed circuit board can have a low dielectric constant (e. g. , 3. 8-4. 4) and a high T. sub. g (e. g. , 180. degree. -200. degree. C. ). The multilayer printed circuit board can be provided by steps including forming electrical circuit patterns from a copper foil on the inner substrate, to form a printed circuit board, forming a stack of at least one printed circuit board and outer copper foil layers, with insulating layers of, e. g. , a semi-cured resin (e. g. , prepreg layers) interposed between adjacent conductive metal layers, and then laminating the stack.