The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
NNTP-Posting-Date: Wed, 25 Dec 2002 23:03:39 -0600
Subject: Re: What light effects photo resist?
Date: Wed, 25 Dec 2002 23:42:57 -0500
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
I could make the laser fairly easily for less than a hundred dollars or 200
for a little more wiggle room but there really is a lot of resources on
making lasers out there. how else would I make a line about 1/10th of a mm
wide? semiconductor manufacturing methods use lasers and reduction lenses
to do this.
wrote in message
> Dave wrote:
> > I want to use a laser to develop a board. I want to do this so that I
> > make small yet accurate lines on pcb. I'm not sure what wave lengths
> > resist is sensitive to though. I've read that it is sensitive to uv and
> > another website said that certain uv doesn't penetrate all the way
> > thick photoresist. It also said that a wavelength of 365nm is just
> > something.
> > I was planning on using wavelengths between 320mn and 400 which is
> > if I use other types of uv I may have to be more careful about exposure.
> > the reason I need to know this is because each laser has a specific
> > output wavelength or wavelengths.
> > so what wavelength should I use?
> For the cost of most lasers in the 320-400nm wavelength range, you could
> buy a commercially built PCB maker, or get several dozen boards of
> size made.
> Look at the specs on the photoresist you intend to buy.
> http://inquisitor.i.am/ | mailto:email@example.com | Ian
> 'Where subtlety fails, we must simply make do with cream pies' -- David
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup