Patent ID: 7179398

Claim:
An etchant for wire, comprising HNO 3 of 0.1 to 10% by weight, H 3 PO 4 of 65 to 55% by weight, CH 3 COOH of 5 to 20% by weight, stabilizer of 0.1 to 5% by weight and the other ultra pure water, wherein the stabilizer is represented as a formula M(OH) x . L y , wherein in the formula, the M is Si, or B, the L is H 2 O, NH 3 , CN, COR (herein, R is an alkyl having the number of carbon of 1 to 5), or NNR (herein, R is an alkyl having the number of carbon of 1 to 5), wherein x is 2 or 3, and y is 0, 1, 2, or 3.