PCB Photosensitive Dry Film 30cmX1meter sheet
PCB Photosensitive Dry Film sheet
1.5 mil thickness of dry film can be completely cover a hole of 0.25 inches
The dry film can be used in the most ordinary plating solution, no wrinkle, no discoloration
It can cut into 10pcs 15cm x 20cm film,and 5pcs 20cm x 30cm film. You can cut it as you like
The following are the steps, and the detailed tutorial will be released later, which is quite easy to succeed.
1. Polish the copper clad plate. This is simple, and it can be polished with the finest water sandpaper.
2, uncover the film, the photosensitive film is sandwiched between the two layers of film, first tear off one side can be torn by means of transparent adhesive tape, try a few more.
3, then film, a little copper plate can be cleaned, flat, try not to have bubbles.
4, after the film is used, the plastic machine is used, not too hot, fixed at about 100 degrees.
5, with inkjet film and laser film, you can achieve the highest fineness, if you do not require the use of sulfuric acid paper for printing accuracy. (The high precision is shown below )
6, the printed circuit diagram is placed on the photosensitive plate, (dry film is negative, so to reverse printing, we provide 99SE and AD printing tutorial) energy-saving lamp exposure for about 8 minutes, exposure machine for 1 minute, the sun 30 seconds -Approximately 60 seconds, the exposure process is obvious, because the photosensitive film will change color when exposed, from light to dark blue. You will easily see your circuit diagram appear on the board.
7. Development, tear off the protective film on the panel and put it into the developer (developer is 1:100, 10 g to 1 L of water). When developing, use a brush to wipe the board with a little force.
8, etching, environmental etchant water 1:4 fast, clean, no smell.
9. After the etched circuit board is stripped, remove the unnecessary film to expose the copper. The release agent is 1:50 water, soak it for a few minutes.
10, after the completion of the board, very good and very beautiful, the most dense line spacing is 0.1MM, line width 0.1MM, although it is easy to do 0.1MM line, but do 0.1 line and 0.1 line distance dry film It can also be easily made.