Patent ID: 7587815

Claim:
A resin-coated metal plate used as a protective plate in drilling a printed wiring board, comprising: a metal plate, and a resin film including a thermoplastic resin coated on at least one surface of the metal plate; wherein a melting peak temperature of the thermoplastic resin measured according to JIS K 7121 is in a range of 60° C. to 120° C., and the thermoplastic resin is analyzed using a thermomechanical analyzer (TMA) according to JIS K 7196, when a thickness of the resin is 100 μm, in a TMA curve measured with an end diameter of an indenter of a probe being 1.0 mm, a force applied to the indenter being 0.5 N, and a heating rate being 5° C./min, a temperature difference exhibited by the thermoplastic resin is within a range of 5° C. to 30° C. in a period while penetration of the probe is changed from 10% to 100% of the resin thickness in a temperature range of 20° C. to 200° C.