Solution for removing titanium-containing coatings and method for same
AssigneesFIH (Hong Kong) Limited, Shenzhen Futaihong Precision Industry Co., Ltd.
InventorsWEI HUANG, HONG-LI GONG
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Abstract
A solution and method for removing titanium-containing coatings from the surface of substrates using the solution are provided. The solution includes 90-1000 g/L organic or inorganic acid; 70-500 g/L accelerant, the accelerant being acid or salt which contains fluorinion; 15-200 g/L secondary accelerator, the secondary accelerator being generic amino alcohols which can combine with titanium ion; 2-8 g/L inhibiter, the inhibiter being selected from one or more of the group consisting of thiourea, thiourea derivatives, and carbamide. The method for removing titanium-containing coating on the substrate mainly includes contacting the substrate with the titanium-containing coating with the solution.
Claims20
An aqueous solution for removing titanium-containing coatings on substrate surface, comprising:
- 90-1000 g/L organic or inorganic acid;
- 70-500 g/L accelerant, the accelerant being an acid or salt containing fluorinion;
- 15-200 g/L secondary accelerator, the secondary accelerator being generic amino alcohols and can combine with titanium ion;
- and
- 2-8 g/L inhibiter, the inhibiter selected from one or more of the group consisting of thiourea, thiourea derivatives, and carbamide.
A method for removing titanium-containing coating on substrate, comprising:
- providing an aqueous solution, the aqueous solution containing 90-1000 g/L organic or inorganic acid, 70-500 g/L accelerant, the accelerant being an acid or salt containing fluorinion, 15-200 g/L secondary accelerator, the secondary accelerator being generic amino alcohols and can combine with titanium ion, and 2-8 g/L inhibiter, the inhibiter being selected from one or more of the group consisting of thiourea, thiourea derivatives, and carbamide;
- and
- contacting the substrate with the titanium-containing coating with the aqueous solution.
Dependencies are inferred from the claim text.