Re: [Homebrew_PCBs] Re: sensitized boards
2007-03-02 by Stefan Trethan
On Fri, 02 Mar 2007 15:45:37 +0100, docstein99 ... because once the copper is gone, it s hard to stop and the fr4 will go too. It s like
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Re: sensitized boards
2007-03-02 by docstein99
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,
Re: [Homebrew_PCBs] Re: cheap UV light sources?
2007-03-02 by otc_friend
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
Re: cheap UV light sources?
2007-03-02 by Len Warner
... 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
Re: [Homebrew_PCBs] sensitized boards
2007-03-02 by Sebastien Bailard
... 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
Re: sensitized boards
2007-03-01 by urbom
... 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
Re: sensitized boards
2007-03-01 by docstein99
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
Re: sensitized boards
2007-03-01 by urbom
... 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
sensitized boards
2007-03-01 by docstein99
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
Re: Trying to learn about substrates
2007-03-01 by dl5012
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
Re: [Homebrew_PCBs] Re: cheap UV light sources?
2007-03-01 by otc_friend
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
Re: Trying to learn about substrates
2007-03-01 by lnrrfan
... from ... Thanks for the feedback Dennis. I was going to ask if you checked my photos but it looks like the moderator has not approved them for posting
Re: Trying to learn about substrates
2007-02-28 by dl5012
Hi Sam, It sounds like you re describing CEM-1. This is a paper epoxy material that s not suitable for THP (Through Hole Plating), so you ll only find it in
Re: Trying to learn about substrates
2007-02-28 by Sam & Paige Fell
Thanks Leon. I m new to PC board talk .is CEM -1 a resin/paper composite .or something similar. I don t believe I want stranded fiberglass filler. I m
Re: [Homebrew_PCBs] Trying to learn about substrates
2007-02-28 by Leon
... From: lnrrfan To: Sent: Tuesday, February 27, 2007 3:28 AM Subject: [Homebrew_PCBs] Trying to
re: laminators
2007-02-27 by mark.mickelsen
Right now there are lots of Royal laminators, models PL2100 and PL2112, available on Ebay for pretty good pricing. Does anyone have any experience with these
Re: [Homebrew_PCBs] Re: resist
2007-02-27 by Stefan Trethan
On Tue, 27 Feb 2007 20:30:41 +0100, William Nelson ... They coat wafers, not boards. But wide inkjets are not uncommon, even a cheap C84 has a head maybe an
Re: [Homebrew_PCBs] Re: resist
2007-02-27 by William Nelson
OK I see the total board is coated with a very thin layer, then they process as usual. Seems like that would have to be one humongus inkjet to do boards fast.
Re: [Homebrew_PCBs] Re: resist
2007-02-27 by Stefan Trethan
On Tue, 27 Feb 2007 18:35:25 +0100, wnnelson0 ... No, they seem to apply an even film, and then photoprocess it like normal. Looks to
Re: resist
2007-02-27 by wnnelson0
... than ... So the photo resist is easier to deposit in finer resolution? Why? How about if we try this too?
Re: [Homebrew_PCBs] resist
2007-02-27 by Stefan Trethan
On Tue, 27 Feb 2007 17:25:15 +0100, wnnelson0 ... Most likely because the resolutions needed for making ICs are higher than what they
resist
2007-02-27 by wnnelson0
Here is a article on printing photo resist. Why would they deposit photo resist instead of a direct resist. R¨¦sum¨¦ / Abstract This article presents a
Re: cheap UV light sources?
2007-02-27 by garydeal
I use a 500 watt halogen work light from the hardware store, $10 including an extra bulb stashed in the handle. I also use this chinese dry-film resist
Trying to learn about substrates
2007-02-27 by lnrrfan
Hi All! I am new to the list trying to learn about different PC board substrates. I think CEM-1 may be what I want but am trying to confirm. I ve scoured the
Re: DIY spray etching tank
2007-02-26 by urbom
I m a newbie here, found the forum while searching for info on pcb s. I m doing a short run of 12x18 boards, and am setting up a screenprint for the resist.
Re: [Homebrew_PCBs] Re: Viscosity (wascheckitout)
2007-02-25 by William Nelson
Down at the bottom on page 8 is a lot of good reading if you can find them. It would appear that the Big Boys are hard at work finding just the right resist
Re: [Homebrew_PCBs] Re: Viscosity (wascheckitout)
2007-02-25 by William Nelson
Notice on page 4 the vicosities of the inkjet inks, very low compared to the materials at Expess3D, almost the same as water. But this is all encouraging for
Re: [Homebrew_PCBs] inkjet development kit
2007-02-25 by Stefan Trethan
On Sun, 25 Feb 2007 16:33:37 +0100, docstein99 ... 96dpi. ST
inkjet development kit
2007-02-25 by docstein99
If someone was looking to build a standalone x,y printer with an inkjet head, without dealing with gutting and hacking an inkjet printer - here is the link for
Re: Check this out !!
2007-02-25 by mycroft2152
Ok, let s try it again :) Poise is the unit of measure for viscosity. Centipoise = 1/100 of a poise. Water is 1, Olive oil is 100. Here is a link:
Re: Check this out !!
2007-02-25 by mycroft2152
Poise is a unit of measure for viscosity -- centipoise is 1/100 of a POISE. Water is 1 and olive oil is approxiamately 100. Here s a link:
Re: Check this out !!
2007-02-25 by mycroft2152
... data sheets ... somehow ... indicates 260 &
Re: Check this out !!
2007-02-25 by mycroft2152
... data sheets ... somehow ... indicates 260 &
[Homebrew_PCBs] Re: Check this out !!
2007-02-25 by Thomas
... Ooops found it ... crazy day !!! I was looking at the Somos 11120 & 14120 data sheet and it indicates 260 & 240 cps, how does this compare with the
[Homebrew_PCBs] Re: Check this out !!
2007-02-25 by Thomas
... http://www.hackaday.com/2006/10/08/inker-the-hand-inkjet/ http://www.fabathome.org/wiki/index.php?title=Main_Page ... sniffing around here
thermal shipping printer / wax ribbon
2007-02-25 by docstein99
Has anyone experiemented with wax ribbon printers? I didnt see anything so far, in my searches. I ve been trying with progress for a few months now. I bought
Re: [Homebrew_PCBs] Re: Check this out !!
2007-02-25 by Brian Pitt
... hobout squishing these two together http://www.hackaday.com/2006/10/08/inker-the-hand-inkjet/ http://www.fabathome.org/wiki/index.php?title=Main_Page Brian
Re: [Homebrew_PCBs] Re: Check this out !!
2007-02-24 by Stefan Trethan
On Sat, 24 Feb 2007 22:35:14 +0100, sam_jfs ... Most of them seem to use UV cure ink. There was even a webpage about an italian
Re: Check this out !!
2007-02-24 by sam_jfs
... us? We ... Just curiosity... About flatbed printers, or XY printers, i saw some years ago one of my customers printing in PVC, it was some electrical
hand-brake project
2007-02-24 by docstein99
There are some design pictures of a homemade hand-brake in the files section. did anyone make this, is there a project page with more pictures?
Re: cheap UV light sources?
2007-02-24 by derekhawkins
... This homebrew light box takes 3.5 minutes per side to expose double sided 6 X4 Ever-Muse boards and that s with normal daylight fluorescent bulbs. The
Re: [Homebrew_PCBs] cheap UV light sources?
2007-02-24 by David McNab
... Thanks ... Now that s what we want - an exposure phase in less than the time it takes to run board+artwork n times through a laminator :) The idea of a
Re: Check this out !!
2007-02-24 by Steve
... business. ... micrometer thick aluminiumoxide layer. ... More likely, the box is painted white with some conventional method, then inkjet printed. But you
Re: [Homebrew_PCBs] Re: Check this out !!
2007-02-24 by Stefan Trethan
On Sat, 24 Feb 2007 18:20:26 +0100, sam_jfs ... I did not doubt they exist, but the question is what use is it for us? We already
Re: Check this out !!
2007-02-24 by sam_jfs
... until now. How is the fine line ... Good resolution but no enough to make pcb´s. The important here it´s the ink or paint used in that process and the
Re: [Homebrew_PCBs] Check this out !!
2007-02-24 by William Nelson
Is this ink or paint? 4 axis painting? I never gave it any thought until now. How is the fine line resolution on that box? You need pretty good resolution to
Re: [Homebrew_PCBs] Check this out !!
2007-02-24 by otc_friend
There is a difference between homebrew and multi-million dollar business. Epson is able to *print*a 20-layer pcb with their inkjet technology. If you spent
Re: [Homebrew_PCBs] cheap UV light sources?
2007-02-24 by Robert Blumer
Very Good light source here: http://thinktink.com/stack/volumes/voliii/equipment/uvlamp/uvlamp.htm I use presensitized pcb, brand name Ever-Muse takes 90 - 120
Re: [Homebrew_PCBs] cheap UV light sources?
2007-02-24 by Zoran A. Scepanovic
Hello Dale, ... Nonconstant UV-A radiation on hourly basis. ... Short UV has nothing to do with photoresist on copperclad. Peak sensitivity of photoresist
Re: [Homebrew_PCBs] cheap UV light sources?
2007-02-24 by Dale J. Chatham
Sunlight. Short wavelength UV doesn t pass through glass very well. The good UV bulbs are made of quartz, hence they re kinda pricey. I ve done boards in