Homebrew PCBs

Sounds interesting.  Does anyone know of a website discussing how to do silk
screening for pcbs and cost?  Also, for a doubled sided board, how are the
vias handled?  What do you fill the holes with such that both sides of the
board have a continuous connection?

Steve

----- Original Message -----
From: "Bob Stone" <spoothammer@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Friday, June 07, 2002 10:09 AM
Subject: Re: [Homebrew_PCBs] Re: Boardmaker Output to HP DeskJet 920 or 960
Inkjetprinters


>
> I have had great success with this process and making printed circuit
> "silkscreens" (also very easy) but instead of transparency paper (too
> expensive) I used a very light weight "onion skin" type writing paper
(about
> $2.00 for 50 sheets) that took the ink very well but still let the UV from
a
> sunlamp through. I placed this over very fine printing silk set in a frame
> that I had coated with silk screen emulsion (artshop) for about 9 minutes.
> After the screen was made I printed the image to circuit boards using a
> squeegee and black acrylic ink. Let it dry and etched it. washed the
acrylic
> ink over with a scrubbee. I made a ton of boards and those that printed
> badly, I just washed the acrylic ink off and printed again. Good for all
but
> very fine traces (like 5 mil). This method is cheaper than transfer paper
or
> anything else (IMHO)
>
> Bob
>
>
> >From: "elsokwak" <elsokwak@...>
> >Reply-To: Homebrew_PCBs@yahoogroups.com
> >To: Homebrew_PCBs@yahoogroups.com
> >Subject: [Homebrew_PCBs] Re: Boardmaker  Output to HP DeskJet 920 or 960
> >Inkjetprinters
> >Date: Fri, 07 Jun 2002 13:46:24 -0000
> >
> >Derek,
> >It works!.
> >I just made a very neat looking PCB with the HP DeskJet 960c!
> >First I had to overcome HP's Commercial trick; I had to install the
> >colorcartridge before the machine was willing to print in black and
> >white.
> >I am using transparencies made by Canon for Color BJ printer(CF-101)
> >after almost getting
> >a heardattack reading the price for the HP trannies ($ 45 for 50)
> >There are thousends of microscopic little pinholes on the
> >transparency but that proved not to be a problem. I am using Bunguard
> >FR4 PCB material. The PCB's are exposed with UV light using contact
> >printing method.
> >Even with the slow output from the 286 computer I did not get white
> >stripes as was always the problem with the old Olivetti.
> >Thanks again!
> >ELSO
> >
> >
> >
> >--- In Homebrew_PCBs@y..., "High Tech" <hightechsystems@a...> wrote:
> > >
> > > Elso,
> > > I am running my dos program on windows 98se right now but it did
> >work
> > > on a dos only computer too.
> > > Derek
> > >
> > >
> > > Hi Derek,
> > > Thanks for the reply.
> > > I don't understand the last sentence of your post stating that all
> > > DOS programs are sending the printjob through Windows.
> > > Boardmaker does not work under Windows; Windows should not even be
> > > detected. Boardmaker is a pure DOS program and works on a PC
> >without
> > > Windows on it. The printerdriver is contained in the program and
> >has
> > > HP PCL3 language.
> > > But if your old program can print to a HP970 I am confident it will
> > > work with the HP960 DeskJet too.
> > > ELSO
> > >
> > > --
> > > >   All dos programs still send the print job through windows so
> >the
> > > HP
> > > > program must be converting the file before it goes to the
> > > >   printer.
> > > >
> > > >   Derek
> > > >
> > > >     I used the laserjetprinter output of the program. I
> >understand
> > > this
> > > >     in in HP PCL3 language to the printer. The Boardmaker program
> > > >     supports printers like HP LaserjetII.
> > > >     The new HP Inkjet printers use HP PCL 3 IMPROVED language. So
> >my
> > > >     question is: is this new  language backwards compatible? Can
> >I
> > > use a
> > > >     HP Deskjet 920 or 960 with my old Boardmaker PCB design
> > > software?
> > > >     The program runs under DOS; Windows should NOT be detected.
> > > >     Any help greatly appreciated.
> > > >     ELSO.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> >
>
>
>
>
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