Furukawa Aluminum Co., Ltd.

Mitsuya Miyamoto

Hiroshi Kawase

Motohiro Nabae

Motoyoshi Yamaguchi

Yasuyuki Ooseki

An anodized memory disk substrate is disclosed, which is characterized in having an anodic film having excellent heat resistance and hardness and having a thickness of not less than 3 .mu.m on the surface of aluminum or an aluminum alloy substrate imparted thereto by means of chromic acid-sulfuric acid mixture. The method described therefor is that, after the formation of anodic film having a film thickness of not less than 4 .mu.m on the surface of substrate, polishing is carried out so as to leave behind the anodic film having a film thickness of at least 3 .mu.m. Heat treatment may be made before or after the polishing.

Anodized memory disk substrate and method of manufacturing the same

This invention relates to a composite material for vacuum brazing comprising a cladding material for vacuum brazing composed of 0.1-2.0 wt. % of zinc, 0.01-2.0 wt. % of lithium and the balance of aluminum, and a core material consisting of aluminum or an aluminum alloy having said cladding material clad onto one surface of both surfaces thereof.

Growing community of inventors

Nikko, Japan

Mitsuya Miyamoto