| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated mat-like polyester film which keeps excellent mold releasability with respect to a press plate and a CL material even if the temperature of a press mold is raised and shows excellent processability not obtained in a conventional polyester film, without damaging its film forming continuity in a CL laminating process (heating press) at the time of production of a printed wiring board. SOLUTION: The laminated mat-like polyester film is a laminated film composed of at least two layers. At least the layer, which constitutes one uppermost surface of the laminated film, contains 3-30 wt.% of inorganic or organic particles with a mean particle size of 3-10μm and its surface roughness Ra (arithmetic average roughness) is 0.30-1.00μm. COPYRIGHT: (C)2007,JPO&INPIT
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