What is photo-etching?

Hello friends!

As I said earlier, there will be a blog on my site!

And in the first article I would like to talk about what photo-etching (photolithography) is and what it is for!

I want to say right away that all the information is intended for the most part for beginners. For those who have never worked with photo-etching, but would like to try it once or at least understand what it is.

Photolithography (from English: photo-etching, photolithography) is a method of obtaining a certain pattern on the surface of a material, widely used in microelectronics and other types of microtechnology, as well as in the production of printed circuit boards.

To put it simply, photolithography is a chemical engraving process that is very popular among many directions.

In order not to delve into the chemical formulas and nuances of etching, I will explain the principle in my own words.

Photoetched details are obtained by applying a special photoresist film or solution to a prepared sheet of metal, after which a drawing is placed on this sheet. Further, this sheet of metal with a drawing is placed under an installation with ultraviolet lamps and the curing process takes place. Those areas that have been protected from UV rays are fixed on the metal surface, and all other areas are washed off in an alkaline solution. After that, this sheet of metal is placed in an acidic solution. Those areas of the metal that were exposed to UV rays are firmly fixed on the metal, and the rest of the areas are eaten away by the solution.

Thus, with the help of this technology, it is possible to obtain parts with great detail from various metals and thicknesses.

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