Can you describe what makes brass pcb different from copper pcb? I'm wondering if I should switch to brass material. How good is soldering? regards - Henry ...
Hi Sam, I'll post a picture of some CEM-1 this weekend. I find the shear more convenient than any other method I've tried (power mitre saw, snips, utility...
I was wondering if anyone can give me some advice, looking at the threads recently it looks like lots of people here have tried sensitized boards. This...
... I don't know about any of the board materials being sensitive to IR. As far as I know, the silkscreen materials are sensitive to UV, depending on the...
Ok, well I can buy a UV laser diode too just as easily as I bought a IR diode. Can I handle the emulsion or film in regular room light with the high- intensity...
... No, yellow bug light is required. Most of the diazo or dual cure emulsions require long exposure. There is one, indirect capillary film, Chromaline's...
... Phillipe Terrone, the editor of makezine.com, had some luck using a CO2 laser to do this: http://www.makezine.com/blog/archive/2007/01/how_to_use_a_la.html...
Sebastien Bailard
penguin@...
Mar 2, 2007 5:05 am
18077
... Yes: AFAIK there isn't any! (You have misinterpreted 'brass' as an adjective instead of a noun in order to extend its scope to 'pcb'.) Brass pcb wouldn't...
Personally I found soldering brass metal not very difficult. I mean here low-temperature soldering, not plunging. So it may make sense to ask for use it as a...
I thought co2 lasers were powerful enough to obliterate the copper itself??? Why bother spraying and etching, when it could simply be set to burn drill-holes,...
On Fri, 02 Mar 2007 15:45:37 +0100, docstein99 <docstein99@...> ... because once the copper is gone, it's hard to stop and the fr4 will go too. It's like...
... I have used a cheap infra-red, I can use to melt most any thin black material, lines so thin you need a 10x lens to see them. With a cnc, I can rasotize...
Can you provide a price info for the ir laser diode? I'm thinking of converting my Epson printer to just a plotter. regards - Henry www.ehydra.dyndns.info ... ...
... I'm sorry, I meant that I etch brass sheet, not pcb's (mostly, anyway). The brass sheet is for parts for miniaturists and the whole etching thing was more...
Another problem is that when the copper melts it becomes highly reflective making it harder for the laser. Plus it reflects all over the place potentially...
I received this answer from the Chemistry Cluster group on Yahoo about solutions other than ink to use for resist in out inkjet. Don't know if it will help...
... If I'm not mistaken an HP printer uses thermal heads to HEAT the ink causing bubble popping, and epson - I believe uses sound (or piezo) heads. Hopefully...
... Also, copper in particular is a very good reflector of the infrared light CO2 lasers use. CO2 laser cutting/engraving is easier with other metals. This is...
Sebastien Bailard
penguin@...
Mar 3, 2007 12:30 am
18089
... I bought this one from ebay (auction # 290087913046): http://cgi.ebay.com/HIGH-POWER-BURNING-LASER-DIODE-IR-OPTICS-MODULE- ...
... I had to use a video camera to check to see if the diode was on or off. Otherwise there is no way to tell whats going on because its invisible. And when...
... This might be a good starting point. I would suggest reading the entire thing, rather than skimming, but they're your eyeballs. X) ...
Sebastien Bailard
penguin@...
Mar 4, 2007 9:26 am
18094
Hello to HB_PCB group I am a new member and this is my first post ... the common thread in the TT process is difficultly in cleaning the paper residue from the...
I use Infared Light to expose my positive sensitized boards because I can expose them in about 90 seconds using a IR heat lamp. Richard ... From: docstein99 ...
Richard, Can you give a little more detail about the heat lamp that you use, such as brand, wattage, and identifier number on it? Thanks. John ... From:...
Great idea i will give it a try gary ... From: Jim Hutchinson <jhutch17@...> To: PCB_Homebrew <homebrew_pcbs@yahoogroups.com> Sent: Sunday, March 4,...
