Patent ID: 11920073
Assignee: PHICHEM CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. An etching composition, comprising: a component A 1-20 wt %, a component B 0.5-15 wt %, a component C 0.1-5 wt %, a component D 0.1-10 wt %, a component E 0.1 ppm-60 ppm and surplus deionized water, the component A is oxidizing agent, the component B is an inorganic acid, the component C is an organic acid, a component D is a chelating agent, a component E is an ionic compound and/or other inorganic acids except the inorganic acid in the component B;
the weight ratio of the component A to the component B is 1:2-2:1;
the ionic compound is an oxide and/or an inorganic salt,
the oxide is alkaline oxide and/or amphoteric oxide; the alkaline oxide is selected from one or a mixture of more of a group consist of sodium oxide, calcium oxide and magnesium oxide, and the amphoteric oxide is zinc oxide and/or manganese oxide;
the inorganic salt is a halide salt, the halide salt is selected from one or a mixture of more of a group consist of copper chloride, ferric chloride, sodium chloride, potassium chloride, calcium chloride, copper bromide, iron bromide, sodium bromide, ammonium bromide, copper iodide, iron iodide, sodium iodide, copper fluoride, iron fluoride, sodium fluoride and ammonium fluoride;
the component B is selected from one or a mixture of more of a group consist of nitric acid and phosphoric acid;
the component C is selected from one or a mixture of more of a group consist of citric acid, acetic acid, tartaric acid, malic acid, formic acid, propionic acid, oxalic acid, butyric acid, isobutyric acid, valeric acid, isovaleric acid, malonic acid, succinic acid, glutaric acid, adipic acid, glycolic acid, acrylic acid, methacrylic acid, lactic acid, gluconic acid, maleic acid, benzoic acid and salicylic acid.