Anyone here have any experience with coating copper clad boards with etch resist photo sensitizer? I brought some spray stuff from MG a while back but it doesn't seem the same. It is clear and the presensitized boards I use have a dark green coating. (not that it probably matters)
I have several unsensitized boards that I'd like to coat but I'm not sure how difficult it is. Anyone have any experience with such things? or know of a good photo resist to get that isn't hard to use?
Thanks, Jon
On a sunny day (Tue, 7 Oct 2008 15:31:51 -0500) it happened "Jon Slaughter" wrote in :
Long time ago I knew somebody who just poored it on, and had the board rotate on an a platter to spread it evenly. Worked 100%.
Thats what the do to make cd's I sorta thought about that but seems like a lot of trouble to go through ;/ (needs to be heated too which means a motor that can withstand the heat(not sure how hot though))
On a sunny day (Tue, 7 Oct 2008 16:44:28 -0500) it happened "Jon Slaughter" wrote in :
I am almost 100% sure he did not heat it. He bought it in huge 1 liter cans IIRC.
I tried the photo resist method but was not successful. I found the Press-and-peel blue stuff far easier to use. But you need a laser printer for the transfer.
Cheers
I use the photo-etch process with pre-coated boards and get excellent results. I print the artwork with a cheap HP DeskJet printer on Premium Jetstar film from Mega Electronics.
Leon
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Yep. No heat and yep it's needing a consistent spray thickness that's the prob'. Used to do it on an old record deck. A ballache of a job so packed it in.
I use the photo-etch process with pre-coated boards and get excellent results. I print the artwork with a cheap HP DeskJet printer on Premium Jetstar film from Mega Electronics.
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I do a similar thing... my results are not excellent but thats just quality controll issues.
But I have several un-sensitized boards I want to sensitize and I have the "spray" resist... it's also a lot cheaper than buying the sensitized boards
Years and years ago I did the spray-on-resist bit, took them outside for exposure ;-) Worked pretty good.
...Jim Thompson
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