Alkaline etching solution and preparation method thereof

Abstract

The invention discloses an alkaline etching solution. The alkaline etching solution is characterized by comprising, ammonium chloride, ammonium bicarbonate, aqua ammonia and an additive, wherein the additive is of the urea type. In the use process of the alkaline etching solution, the etching solution is alkaline, and the requirement for equipment is low; the use cost is low, operation is safe andenvironmentally friendly, and a detection control system is simple; side etching is low, the alkaline etching solution is suitable for production of dense and thin circuit boards, and the etching speed can be automatically controlled, the etching speed is high, and the stability is rapid.

Description

technical field [0001] The invention belongs to the technical field of metal etching, in particular to an alkaline etching solution and a preparation method thereof, in particular to an alkaline etching solution used for metal copper on a printed circuit board. Background technique [0002] The printed circuit board is an important electronic component and a carrier for the electrical connection of electronic components. With the development of modern science, the development level of printed circuit boards is an important symbol to measure the electronic information level of a country. [0003] The quality of printed circuit boards is directly related to the quality and service life of electronic equipment. If electronic equipment is used for civilian products, it is related to thousands of households. [0004] The function of the etching solution is to etch the copper surface on the substrate into a line shape. There are acidic and alkaline types. At present, the main c...

AI Technical Summary

Problems solved by technology

[0008] In the existing alkaline etching solution technology, inorganic compounds are generally used for compounding, resulting in unstable etching rate and poor etching uniformity