| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible laminate with a small tensile modulus of elasticity, which shortens a treatment time required for a heating step after a polyimide precursor resin solution is applied onto conductive metallic foil, in a manufacturing process for the flexible laminate, and which is excellent in bendability and dimensional stability. SOLUTION: In this manufacturing method for the flexible laminate, the polyimide precursor resin solution is applied onto the conductive metallic foil, and subjected to heating treatment, so as to be dried and cured. Characteristically, the total of heating time at 90°C or higher in the heating treatment is in the range of 5-25 minutes; the ratio between heating time at 90-200°C and heating time at a temperature exceeding 200°C is set to be in the range of 9:1-7:3; and control is performed so that the tensile modulus of elasticity of a polyimide resin layer formed on the conductive metallic foil can be in the range of 3-6 GPa and so that a coefficient of thermal expansion thereof can be in the range of 16-28 ppm/°C. COPYRIGHT: (C)2008,JPO&INPIT |
