Patent ID: 6379487
Filing Date: 2002-04-30
Classification: B32B,H05K,Y10S,Y10T

Abstract:
A method of forming a laminate used in the manufacture of printed circuit boards, comprising the steps of:conveying a generally continuous web of a chromium coated steel substrate along a predetermined path, said chromium having a thickness from about 30 grams per square meter to about 160 grams per square meter and said steel substrate having a thickness from about 0.10 mm to about 0.20 mm; simultaneously applying a layer of copper having a thickness from about 2 &mgr;m to about 70 &mgr;m to each of said chromium layers in an electrodeposition cell disposed along said path; severing said generally continuous web into individual sheets; positioning one of said sheets between two dielectric layers with adhesive disposed between said copper layers and said dielectric layers; applying heat and pressure to said layers to bond said copper layers to said dielectric layers; separating said steel substrate from said copper layers; and discarding said steel substrate.