| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal-based radiating substrate for electric circuit, which is low in cost and high in reliability, by forming an insulating film, excellent in chemical resistance and insulating characteristic. SOLUTION: In the manufacturing method of the radiating substrate for electric circuit wherein a metal sheet layer is formed by the vapor growth method on the surface of the aluminum substrate, on which the insulating film is formed by anodization, and, thereafter, a metal film is formed by electroplating, the aluminum substrate processed by anodization is immersed in a polyimide varnish solution, adjusted so that the amount of resin is 1-10 wt.%, for not less than 5 minutes whereby the polyimide resin is filled into the pores of the insulating film. COPYRIGHT: (C)2009,JPO&INPIT |
