Printed circuit board

[Gia]

Maybe c'? a fan like me who is having fun with these things and can? give me an advice.

Do I have to print a circuit with the method of photo-engraving and can't get it to come out. Use the bromografo to impress the board. The circuit I printed it onto a sheet of glossy paper. After the bromografo to uv rays, wash the plate with the caustic soda and exits out of the circuit. After I put the plate in the ferric chloride and ? them that I can.

Or does not corrode, such as when I exposed too much, block uv rays, or corrode the slopes, as when exposed for a short time. The tests I have done all. Even with differences of + or - 30 sec exposure



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[ecuboost]

I know that you were wrong section....or even forum

[Gia]

I thought there was quanlcuno who loves to ste cosette... always electronics we speak

[ecucilacunta]

Could you better describe the process and what materials you use. I've done a few circuit, maybe I can help you.

[Gia]

1: block-type photosensitive
2: bromografo to uv rays
3: caustic soda ( dose used 10g per litre)
4: ferric chloride

Print the circuit on a sheet of glossy paper. Support the plate on the paper (being careful to) and expose to uv for 2 min. I also tried with 1min and 30 sec and 3 min but I have the worst results.
For the development I put the block in caustic soda, until you don't see the circuit (such as the development of the photo). Here well-known that the part is not impressed, and it should stay shiny and is slightly opaque. If you increase the time that remains in the caustic soda does not change too much,whereas if you increase the % assay of the soda in the water from 10mg / L to 15mg / L port via well as the part impressed, and the cio? the circuit.
Finally, I put the block in the ferric chloride. Using the exposure to the rays for 1min and 30 sec chloride. while if I expose the plate for 2 min I get the one in the photo. with the exposure time of 3 min chloride fails to corrode almost nothing.

What are you saying?

[ecucilacunta]

The proceedings ? right, that printer uses. Inkjet or laser?

[ecucilacunta]

The soda you have to prepare it at the time, and possibly with distilled water and a concentration of 8g per litre.

[Gia]

Inkjet printer. Unfortunately I do not have the laser.

In any case, I used distilled water, but I have prepared a litre and I have used it for all times.

I thought that the problem might be the distance from the neon being a bromografo craft (I used the carcass of an old scanner)

[ecucilacunta]

I at the time I scatterbrain much to get decent results. the bromografo that I used, it was well crafted, and like you I used a scanner.
For the printer I has provided an ink(pi? dense) my friend who is a printer and you say? the results are improved. However, a laser printer ? getting better and better.
Pu? be shiny in the printed part to let go a little light.

[Gia]

I understand what you say! I solved that problem sovrapponento perfectly 2 circuits printed on glossy.

What is the distance you had between the neon and glass. I remember that the school did exposure that ranged from 5 to 10 min, for? I don't remember well