| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible copper-clad laminated sheet excellent in flexibility by a simple means using a pair of heat press rolls.SOLUTION: Provided is a method for producing a flexible copper-clad laminated sheet having: a heat bonding step of heat-bonding copper foil (A) and a laminated body (B) such as a polyimide film using a heat press roll; and a reheating step, in which the polyimide layer in the laminated body (B) is made of a plurality of polyimide layers each having a thermoplastic polyimide layer (ii) as an adhesive layer, the laminate temperature T1 of the heat bonding step is higher than the glass transition temperature of the thermoplastic polyimide layer (ii) or more, and, by controlling the heating treatment temperature T2 in the reheating step to T1 or more, the relation between the diffraction intensity (I) of the (200) face obtained by the X-ray diffraction in the thickness direction of the copper foil (A) after the heat bonding step and the diffraction intensity (Io) of the (200) face obtained by the X-ray diffraction of fine powder copper is controlled to I/Io>100.SELECTED DRAWING: None |
