Chemical etching is a technique in which materials are removed by chemical reaction or physical impact.
Etching techniques can be divided into "wet etching" and "dry etching" two categories.
Usually referred to as etching is also known as photochemical etching, refers to the exposure of plate making, development, will be etching area of the protective film removed, in etching contact with chemical solution, to achieve the effect of dissolution corrosion, the formation of concave and convex or hollow molding effect.
The earliest used to manufacture copper plate, zinc plate and other printing concave and convex plate, but also widely used in reducing the weight of instrument panels, brand-name and traditional processing method difficult to process thin workpiece processing; After continuous improvement and process equipment development, it can also be used in the aviation, mechanical, chemical industry in electronic chip parts precision etching products processing, especially in the semiconductor process, etching is an indispensable technology.
For example, Moto V3 keyboard, text and symbols are shaped by the hollowed-out etching process.
Process: cleaning sheet (stainless steel and other metal materials)- drying - coating - exposure - development - etching - stripping
Glass surface chemical processing
Hydrofluoric acid is used to corrode the local surface of glass products, and various patterns, patterns, scales and grids are depicted on the surface. The chemical etching process is to first coat the glass surface to be etched with protective paint or paraffin wax, and then add the etching solution composed of hydrofluoric acid and a small amount of NH4F. The glass surface layer acts with hydrofluoric acid, and the generated fluoride is dissolved in the etching solution or deposited on the glass surface.
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