SHEET FOR PUNCHING WORK IN PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a sheet for punching work in a printed wiring board, causing little axial vibration of a drill and reducing drill smears and coarse inner walls, to provide a high-quality printed wiring board. SOLUTION: The sheet for punching work in a printed wiring board is so constituted that a thermoplastic resin film and a metal foil are laminated together with an adhesive added with a lubricant.