Surface-treated aluminum alloy substrates for magnetic disks

Details Surface-treated aluminum alloy substrates for magnetic disks Surface-treated aluminum alloy substrates for magnetic disks

1985-04-18

1986-12-23

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156655, 156667, 204 351, 204 42, 252 792, B44C 122, C03C 1500, C03C 2506

Patent

active

046311122

ABSTRACT:
A method for treating surfaces of magnetic disk substrates of aluminum alloy with an anodic oxide film on the surfaces thereof, the method comprising: dissolving part of the anodic oxide film by an etching treatment to broaden micro pores of the anodic oxide film to a diameter greater than 170 .ANG..

REFERENCES:
patent: 3626233 (1971-12-01), Wainer et al.
patent: 4251330 (1981-02-01), Sheasby et al.
UK Patent Application No. GB 2142 043 A (Unexamined Publication).

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