Film fading liquid composition with disubstituted benzothiazole as corrosion inhibitor

Abstract

The invention relates to a film fading liquid composition with disubstituted benzothiazole as a corrosion inhibitor, relating to a film fading liquid for removing a dry film on the surface of an ultrathin copper circuit in the production process of the ultrafine circuit of a printed circuit board (PCB). The film fading liquid composition disclosed is prepared from the following ingredients of a) 6.0-10.0wt% of aliphatic amine, b) 0.5-2.0wt% of glycol ether organic solvent, c) 0.05-0.20wt% of corrosion inhibitor, and d) the balance being water, wherein disubstituted benzothiazole is used as the corrosion inhibitor. The film fading liquid composition is capable of quickly removing the film on the surface of the copper circuit without corroding the copper surface, and is good in a corrosion inhibition effect; and therefore the integrity of the circuit on the circuit board is thoroughly guaranteed and the quality of the circuit board is improved.

Description

technical field [0001] The invention relates to a film stripping liquid used for quickly and efficiently removing film on the surface of copper lines during the production process of printed circuit board (PCB) ultra-fine lines. The film stripping liquid has a good corrosion inhibition effect on the copper surface and ensures The integrity of the circuit after peeling. Background technique [0002] With the diversification of electronic product functions, miniaturization, portability, and low-cost development requirements, higher requirements have been put forward for the manufacture of circuit boards, the core of electronic products. In terms of circuit production, circuit design The line width / spacing (L / S) of copper wires is getting denser and more refined, and the line width / spacing (L / S) of copper wires is gradually reduced from 100μm / 100μm → 80μm / 80μm ​​→ 50μm / 60μm → 40μm / 50μm, and even thinner ultra- Fine lines. The production of fine lines is achieved by photochemi...

AI Technical Summary

Problems solved by technology

The combination of these organic bases and organic solvents can greatly improve the film stripping performance, but the ability to protect thin lines is not strong, copper wires will still be corroded, and the quality of subsequent processes is still not guaranteed.

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