| 摘要 |
PROBLEM TO BE SOLVED: To stably manufacture a flexible copper clad laminate comprising a copper foil of superior flexibility and a polyimide resin layer. SOLUTION: In a method for manufacturing a copper clad laminate comprising the copper foil and the polyimide resin layer by applying a polyimide precursor resin solution to the surface of the copper foil and then drying and hardening in a following heat treatment process, by maintaining 5-40 minutes in the temperature range of 300-450°C in the heat treatment process by using an electrolytic copper foil as the copper foil, the average crystal grain diameter of the copper foil is grown up 2-8 times of the average before the heat treatment process. COPYRIGHT: (C)2007,JPO&INPIT |
