Methods of cleaning discolored metallic arrays using chemical compositions
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United States of America Patent
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Jun 15, 2004
Grant Date -
Aug 15, 2002
app pub date -
Feb 14, 2002
filing date -
Feb 14, 2001
priority date (Note) -
Expired
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Abstract
Methods of removing discoloration from a metal surface of an electronic device are presented the methods comprising the steps of exposing a metallic surface of an electronic device to a first composition comprising an organic reagent, the metallic surface having discoloration thereon, under conditions sufficient to form a first intermediate metallic surface substantially devoid of non-ionic residues; a second step of contacting the first intermediate metallic surface with a second composition comprising an acid under conditions sufficient to form a second intermediate metallic surface substantially devoid of non-ionic residues, oxides, hydroxides and the like; and rinsing the second intermediate metallic surface with deionized water.
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