With the exception of multilayer bit, I don't see anything special on
your pictures.
Those tracks are somewhere around 8-10 mils, which is easily achievable
at home, with a bit of practice and equipment tuning, ofcourse.
Na 20. 07. 2010 02:05, Richard je pisal:
>
> .... another approach:
>
> As I had mentioned,the SMDs and ICs component sizes that I am using are so
> small,I have abandoned trying to make very small, multi-layer, fine
> trace boards
> at home.
>
> I now build all my very small and extremely dense prototypes with-out
> a "PCB" in
> one or two days completed!:
> http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/26052
> http://groups.yahoo.com/group/Homebrew_PCBs/photos/album/2086759579/pic/list
>
> --- In Homebrew_PCBs@yahoogroups.com
> <mailto:Homebrew_PCBs%40yahoogroups.com>, Hugh Weinrich <hughaw@...>
> wrote:
> >
> > As a designer and user PCB's in the 16-20 layer area,
> > I would advise that once you leave the 2-layer design, and move
> to a 4-layer design;
> > the complications of layer alignment & plated through holes
> justifies paying the 'professionals' their due.
> > Â
> > Four layer PCB's can be aquired for as little as 100$ for four
> 3.8in x 2.5in boards.
> > see  http://www.expresspcb.com/ExpressPCBHtm/Specs.htm
> >
> >  As for How is a PCB Made ? see:
> Â www.instct.org/secure/downloads/HowIsAPCBMadeICT_V5.pdf
> > slides 1-31 give a detailed explaniton of how this is done
> professionally
> > Â
> > Â
> > Â HughAW
> >
> > --- On Mon, 7/19/10, ae5ew <ae5ew.us@...> wrote:
> >
> >
> > From: ae5ew <ae5ew.us@...>
> > Subject: [Homebrew_PCBs] Re: Multi-Layer PCBs
> > To: Homebrew_PCBs@yahoogroups.com
> <mailto:Homebrew_PCBs%40yahoogroups.com>
> > Date: Monday, July 19, 2010, 5:17 AM
> >
> >
> > Â
> >
> >
> >
> > I'm not considering doing such a thing. Curious to understand how a
> reliable connection is assured in such a PCB. My experience as a
> technician has exposed me to some through-hole contacts on 2-layer
> PCBs can sometimes be a problem. Some soldering can usually correct
> that. Vias must be reliable for the PCB to be of use. Charles AE5EW
> >
> > --- In Homebrew_PCBs@yahoogroups.com
> <mailto:Homebrew_PCBs%40yahoogroups.com>, Dylan Smith <dyls@> wrote:
> > >
> > > On Mon, Jul 19, 2010 at 11:56:48AM -0000, ae5ew wrote:
> > > > Ok. I admit I'm ignorant when it comes to this subject. How is
> an IC
> > > > lead connected to say layer 8 on a 16 layer PCB.
> > >
> > > Via a via :-)
> > >
> > > I presume you're talking about through hole components, in which case
> > > the via that forms the hole the IC pin goes through. For SMD, a
> via must
> > > be drilled.
> > >
> > > On a commercially made board this via is through plated and makes
> > > contact with the tracks in the inner layer that you have connected to
> > > it. Some brave souls homebrew 4 layer boards, there are various
> > > strategies for making contact to inner layers in absence of
> through hole
> > > plating (I presume the hole on the top layer is a little larger so
> that
> > > a wire can be soldered to both the inner layer and outer layer to
> make
> > > the connection).
> > >
> > > For me a multi layer board normally means fine pitch SMD (already
> > > increases the difficulty level in home making a PCB) as well as multi
> > > layers, so I just use a commercial board house since two lots of
> > > difficult tasks goes from being a fun challenge to frustration!
> (If push
> > > came to shove, I'd consider a 4 layer board where the inner layers
> were
> > > power and ground planes).
> > >
> >
> >
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
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