| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a masking film supporting base having excellent characteristics required for a masking film used in partially plating a wiring board, namely excellent punchability in punching a plated part, excellent followability to the surface of a wiring board, low shrinkability in heating and wettability to an adhesive. <P>SOLUTION: The masking film supporting base is obtained by lamination of layers composed of a polybutylene terephthalate and a layer composed of a polyester having a glass transition temperature of 40-90°C by a coextrusion method and has total thickness of 10-50 μm. <P>COPYRIGHT: (C)2012,JPO&INPIT |
