| 摘要 |
PROBLEM TO BE SOLVED: To provide a multilayered polyimide film having high tensile breaking strength, high tensile elasticity and the coefficient of linear expansion in a low surface direction all together, and excellent in surface adhesiveness, and its manufacturing method. SOLUTION: The multilayered polyimide film is constituted by laminating at least a layer (a) which comprises polyimide represented by a compound 1 having, for example, a 4,4'-oxydiphthalic acid residue as a residue of an aromatic tetracarboxylic acid and 1,3-bis(4-aminophenoxy)benzene as a residue of aromatic diamine, and a layer (b) which comprises polyimide having at least a pyromellitic acid or biphenyltetracarboxylic acid residue as a residue of an aromatic tetracarboxylic acid and diamine or phenyldiamine having a benzoxazole skeleton as a residue of aromatic diamine. The multilayered polyimide film is formed by laminating the layer (a) and the layer (b) at 200°C or lower in a state that residual volatile component ratios of both the layers are 10% or higher. COPYRIGHT: (C)2008,JPO&INPIT
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