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Browse Prior Art Database

BLISTER Elimination in RISTON T168

IP.com Disclosure Number: IPCOM000040516D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Kuczynski, JP Russell, DJ Simpson, LL [+details]

Abstract

Printed circuit panels that are manufactured using a method involving the additive plating of circuit lines on a prepreg surface occasionally experience blisters which become visible only after the electroless deposition of the copper-plated circuits. The blisters are seen as small round areas of resist poor adhesion along the plated copper lines and are related to functional defects, including copper spots and insulation/resistance failure. Following hot roll lamination of RISTON * T168 onto the seeded prepreg surface, micro-voids/micro-capillaries are formed between the resist and the prepreg. The minute channels function as a semi-permeable membrane between the bulk additive bath solution and the sandwiched Reten/seed mixture.