Patent ID: 8999194
Filing Date: 2015-04-07
Classification: C09K,C23F,H05K

Abstract:
1. An etching solution capable of effectively reducing Galvanic effect, being used for treating a wet etching process to a first metal and a second metal disposed on a substrate, comprising: an etchant, being dissolved in a solvent so as to form an etching solution; and a nitrogen containing five-member heterocyclic compound, being dissolved in the etching solution for forming an organic protecting film on the surface of the first metal during the wet etching process; wherein the content of the etching solvent dissolved in the solution is ranged from 5 g/L to 250 g/L, and the content of the nitrogen containing five-member heterocyclic compound dissolved in the etching solution is ranged from 0.01 g/L to 50 g/L; wherein the nitrogen containing five-member heterocyclic compound is a 1,4,5-R1-1,2,3-triazole and represented by following chemical formula (7), and the said 1,4,5-R1-1,2,3-triazole can be further contained with one or two second organic groups or hydrogen so as to make the nitrogen containing five-member heterocyclic compound carry with a positive ion, and then by letting the nitrogen containing five-member heterocyclic compound contain at least one negative ion for making the chemical formula achieve charge balance; wherein the nitrogen containing five-member heterocyclic compound containing a second organic group or hydrogen represented by following chemical formula (8) or chemical formula (9); moreover, the nitrogen containing five-member heterocyclic compound containing two second organic group or hydrogen represented by following chemical formula (10), wherein R1 in the chemical formula (7) represents a first organic group or hydrogen, and the aforesaid first organic group is selected from the group consisting of: ether, alcohol, acid, alkyl, alkene, alkyne, benzene, phenol, and benzoic acid; wherein R2 in the chemical formula (8), chemical formula (9), or chemical formula (10) represents a second organic group or hydrogen, and the aforesaid second organic group is selected from the group consisting of: ether, alcohol, acid, alkyl, alkene, alkyne, benzene, phenol, and benzoic acid; moreover, the negative ion is selected from the group consisting of: F