Patent ID: 7951463
Filing Date: 2011-05-31
Classification: B22F,C23C,Y10S,Y10T

Abstract:
1. A water-collapsible Al film formed on a component member for a film-forming chamber and that consists essentially of particles constructed from a single or a plurality of crystalline grains of Al or an Al alloy, comprising: a film of a low melting point metal or alloy selected from the group consisting of In, combinations of In and Sn, and alloys thereof, covering an external surface of the water-collapsible Al film, whereby when film-forming materials have been deposited on the surface of the water-collapsible Al film on the component member after film-forming processes, and the component member with the water-collapsible Al film formed thereon is exposed to a humid environment, the water-collapsible Al film dissolves, thereby removing the deposited film-forming materials without damage to the component member.