THERMALLY FUSIBLE POLYIMIDE FILMS, LAMINATED SHEET USING POLYIMIDE FILM AND METHOD FOR MANUFACTURING POLYIMIDE FILM/LAMINATED SHEET

摘要

PROBLEM TO BE SOLVED: To provide a thermally fusible polyimide film with high heat resistance which is used for manufacturing a one side metallic foil laminated sheet, especially a one side copper-plated laminated sheet, both not using a release paper during laminating a metallic foil, and a one side metallic foil laminated sheet, especially a one side copper-plated laminated sheet, both using the polyimide film.;SOLUTION: This polyimide film has a thermally fusible polyimide layer with a thickness of 4 to 45 μm formed on both surfaces of a heat-resistant polyimide layer (an S1 layer) with almost the same thickness as the former and a total thickness of 3 to 10 μm of the thickness of the thermally fusible polyimide layer formed on one surface of the heat-resistant polyimide layer (the S1 layer) and the thickness of the thermally fusible polyimide layer formed on the other surface. In addition, the 0.1 to 2 μm thick heat-resistant polyimide layer (an S2 layer) without heat fusibility is laminated on the thermally-fusible polyimide layer one surface of the heat-resistant polyimide layer (the S1 layer), so that the polyimide film has heat fusibility only on one surface. Thus the polyimide film having the heat fusibility on one surface and a copper foil are laminated over each other by thermal contact bonding through the polyimide layer with the heat fusibility.;COPYRIGHT: (C)2004,JPO&NCIPI