Anodic coatings on aluminum for circuit packaging

Details Anodic coatings on aluminum for circuit packaging Anodic coatings on aluminum for circuit packaging

1988-01-15

1990-01-16

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 33, C25D 1108

Patent

active

048941263

ABSTRACT:
An anodizing bath for aluminum alloys is disclosed; the aqueous bath solution contains sulfuric acid, citric acid, urea, and ammoniated colloidal silica; the latter three components being a complexing agent, a leveling agent and a stabilizing agent, respectively, so as to result in an oxide layer having and amorphous structure which eliminates the necessity of sealing thick anodic coating.

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IBM Technical Disclosure Bulletin, vol. 23, No. 8, Jan. 1981, pp. 3854-3856, A. Homola et al.

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