Patent ID: 6713188
Filing Date: 2004-03-30
Classification: C23C,C25D,H01J,Y10T

Abstract:
A clean aluminum alloy for use in the fabrication of semiconductor apparatus where at least a portion of the clean aluminum alloy surface is protected by an anodized coating, said clean aluminum alloy comprising impurity particulates such that at least 85% said impurity particulates are less than 5 &mgr;m in size, less than 15% of said impurity particulates range in size from 5 &mgr;m to 20 &mgr;m in size, and less than about 1% of said impurity particulates are larger than 20 &mgr;m in size, with no impurity particulates being larger than 40 &mgr;m, wherein iron is present at a concentration ranging from about 0.001% to about 0.2% by weight, silicon is present at a concentration ranging from about 0.4% to about 0.8% by weight, and copper is present at a concentration ranging from about 0.15% to about 0.30% by weight.