Homebrew PCBs

On 4/5/08, mlerman@... <mlerman@...> wrote:
>
>  Now that I can print single sided  boards, I think I've found a way to print double sided boards, with excellent registration, in a single pass. This will need more than a simple hack, but I'm pretty certain it is doable.
>
>  I'm considering the commercial applications. Is anyone on the list knowledgable enough in the field to provide some expertise and thoughts as to the commercial viability of such a product? I would especially be interested in someone who is interested in partnering in the project. BTW, I have several successful inventions on the market and have some financial resources to pursue this if it is viable.
>
>  Mark
>
>  ------------------------------------
>
>  Be sure to visit the group home and check for new Links, Files, and Photos:
>  http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>

>Hi,
>
>The main point against commercial application for doublesided boards
>would be the inability to "tent" vias. Few commercial boards are
>doublesided but not throughhole plated.
>Also, laser printer distortion could be a problem.
>
>It would be good if we could go through all that again, 'cause i don't
>yet understand how you did it. I thought it was impossible, and still
>have my reservations about it's practicality. If you have the patience
>to answer my questions i'll try to replicate your results.
>
>Back when i was working on direct inkjet printing i was contacted by
>some PCB manufacturer in the US very interested in having me
>demonstrate it to him "all expenses paid". I had no intentions to do
>so but if you are interested i can probably find the contact details.
>
>ST
>
>
>On 4/5/08, mlerman@... <mlerman@...> wrote:
> >
> >  Now that I can print single sided  boards, I think I've found a 
> way to print double sided boards, with excellent registration, in a 
> single pass. This will need more than a simple hack, but I'm pretty 
> certain it is doable.
> >
> >  I'm considering the commercial applications. Is anyone on the 
> list knowledgable enough in the field to provide some expertise and 
> thoughts as to the commercial viability of such a product? I would 
> especially be interested in someone who is interested in partnering 
> in the project. BTW, I have several successful inventions on the 
> market and have some financial resources to pursue this if it is viable.
> >
> >  Mark
> >
> >  ------------------------------------
> >
> >  Be sure to visit the group home and check for new Links, Files, 
> and Photos:
> >  http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
> >
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>

>Hi Stefan,
>
>I'm not sure whether I am actually interested in a commercial venture
>- I have more than enough to do right now - but I am interested in
>considering it. I haven't really done much with the process so far,
>but I'll try and do more in the next few days. If it has commercial
>viability, it would be only as a prototyping system, not for
>production. It certainly seems much better and faster than the cnc
>board mills that go for thousands of dollars.
>
>My approach to things of this sort tends to be empirical - try it and
>see what happens - rather than look at whether it can be done from a
>theoretical point of view. You'd be surprised how often things that
>"can't be done" really can!  Here is a link to my other products -
>they are "out of the box" type products, as well. <http://www.markkenny.com>.
>
>I'll be happy to answer and questions that you might have. I'm tied
>up for the moment, but I'll try to go through what I did in a step by
>step fashion so that it can be repeated. I can do it on the web site
>or in this forum - any preferences?
>
>Mark
>
>
>
>At 11:47 AM 4/5/2008, you wrote:
> >Hi,
> >
> >The main point against commercial application for doublesided boards
> >would be the inability to "tent" vias. Few commercial boards are
> >doublesided but not throughhole plated.
> >Also, laser printer distortion could be a problem.
> >
> >It would be good if we could go through all that again, 'cause i don't
> >yet understand how you did it. I thought it was impossible, and still
> >have my reservations about it's practicality. If you have the patience
> >to answer my questions i'll try to replicate your results.
> >
> >Back when i was working on direct inkjet printing i was contacted by
> >some PCB manufacturer in the US very interested in having me
> >demonstrate it to him "all expenses paid". I had no intentions to do
> >so but if you are interested i can probably find the contact details.
> >
> >ST
> >
> >
> >On 4/5/08, mlerman@... <mlerman@...> wrote:
> > >
> > >  Now that I can print single sided  boards, I think I've found a
> > way to print double sided boards, with excellent registration, in a
> > single pass. This will need more than a simple hack, but I'm pretty
> > certain it is doable.
> > >
> > >  I'm considering the commercial applications. Is anyone on the
> > list knowledgable enough in the field to provide some expertise and
> > thoughts as to the commercial viability of such a product? I would
> > especially be interested in someone who is interested in partnering
> > in the project. BTW, I have several successful inventions on the
> > market and have some financial resources to pursue this if it is viable.
> > >
> > >  Mark
> > >
> > >  ------------------------------------
> > >
> > >  Be sure to visit the group home and check for new Links, Files,
> > and Photos:
> > >  http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >------------------------------------
> >
> >Be sure to visit the group home and check for new Links, Files, and Photos:
> >http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>

On 4/5/08, Mark Lerman <mlerman@...> wrote:
>
>  Or do you want to take this off list?
>
>  Mark
>

>Hi Mark,
>
>I'm perfectly happy to keep this on the list so everyone may benefit.
>
>One of my questions is about the mechanics. If one sends a rigid PCB
>through a laser printer i would expect the edges to eventually damage
>the sensitive coating on the drum. Even with careful de-burring
>potential for damage seems high.
>
>Another thing is toner density. When i tried printing on metal foil i
>noticed i can only achieve 50% of normal toner density, because the HV
>that normally holds the toner is shorted out. I did not consider it
>possible to achieve enough toner density to resist the etchant.
>
>Generally i much prefer laser printers, i hate the messy ink business.
>But with an inkjet the head moves some distance from the surface, so
>that is no problem.
>
>Did you use some type of carrier sheet or was the PCB large enough to
>be transported by the printer?
>
>Thanks
>
>ST
>
>
>On 4/5/08, Mark Lerman <mlerman@...> wrote:
> >
> >  Or do you want to take this off list?
> >
> >  Mark
> >
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>