trennfolien from steel alloy and copper / steel composite films for use in the manufacture of printed circuit boards

摘要

A corrosion resistant steel alloy separator sheet (12) for use in a press lay-up between printed circuit board panels, a sheet laminate (10) for use in a press lay-up between printed circuit board panels having a steel alloy layer (12) and a copper foil layer (14) releasably bonded to at least one surface of the substrate layer, and a sheet laminate (10) for use in a press lay-up between printed circuit board panels having a metal substrate (12) layer releasably bonded to the copper foil layer (14) by a plurality of metal-to-metal bonds (16) disposed along the boundary (18) of the copper foil layer (14) such that gaps (20) are defined between the bonds (16).