Case Case

Etching process

Date: 2017-04-27
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Details of the details

Corrosion fluid distribution
After each etching of the board, a certain amount of nitric acid is added, and the amount of magnesium is added according to the amount of etching before and after etching.

Etching process

Select film
The selected film is different and the etching pattern will be different.

 

Etching process

Selective etching
Erosion thickness of 0.6 -7.0, respectively, according to how much thickness of the board to choose.

Etching process

 

 

 

 

 

 

Print
The principle of the exposure machine is to transfer the image information of the film to the photoresist which is coated with photosensitive film by emitting ultraviolet rays.

Etching process

Development

The exposure of the exposure machine should be put into the sodium hydroxide (base) containing about 3%-5% to develop, and in general, take out after 5-10 seconds.

 

 


Etching process

Wash version

The nitric acid etched into the concentration of 3%-5% in cleaning 2-3 seconds, and then washed with water, then etched with a hair dryer to dry on both sides, after that before etching weight in the electronic scale, a photosensitive adhesive coated on one side with a layer of adhesive coating in Arabia, immediately into the etching etching machine.

Etching process

Etching of etching machine

When etching into the etching machine, the temperature, speed, time and depth of the etching machine should be recorded, and the experiment should be recorded at this time.

Etching process



 

 

 

 

 

 

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