Etching a substrate: processes – Nongaseous phase etching of substrate – Etching inorganic substrate
Reexamination Certificate
2010-11-10
2011-11-01
Culbert, Roberts (Department: 1716)
Etching a substrate: processes
Nongaseous phase etching of substrate
Etching inorganic substrate
C216S096000, C216S108000
Reexamination Certificate
active
08048331
ABSTRACT:
An etching composition which comprises at least one organic carboxylic acid compound selected from acetic acid, propionic acid, butyric acid, succinic acid, citric acid, lactic acid, malic acid, tartaric acid, malonic acid, maleic acid, glutaric acid, aconitic acid, 1,2,3-propanetricarboxylic acid and ammonium salts of these acids, a polysulfonic acid compound and water, and an etching process which comprises etching a conductive film comprising zinc oxide as the main component using the etching composition described above.
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Extended European Search Report dated Dec. 1, 2008, for EP Application No. 07 10 8809.
Maruyama Taketo
Matsubara Masahide
Antonelli, Terry Stout & Kraus, LLP.
Culbert Roberts
Mitsubishi Gas Chemical Company Inc.
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