Homebrew PCBs

Dear Friends,
I am trying to setup a small prototyping facility for testing my designs.
Usually my designs are single sided,until now I used to make it using
OHP marker pens and FeCl as etchants as these things are easily
available in India.

Since this technic requires an artistic hand and has zero
repeatability ( for at least 2-3 boards) I want to use photo etch method.

I tried transferring the artwork by screen printing (silk screen),it
is a  popular method for visiting cards here, on copper clad, but
there were lot of pinholes.

I tries tone transfer but my printers are all 600dpi laser again I get
pinholes.

Now since I can get the films done easily I want to understand how to
do photo etch without a pre-sesitized board which is not available here.

Can anyone help me with the name of the photoresist that I can find
here in India?


Any help is appreciated.
Awaiting for your replies

Thanking you
Deepak

Hi Kashyap

I just checked and it seems that you have a local RS-components in india. www.rsindia.com.
They should be able to supply you with anything you need in that perspective.

Kindest Regards.

Stig.

  ----- Original Message ----- 
  From: Kashyap Deepak 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Sunday, January 21, 2007 11:05 AM
  Subject: [Homebrew_PCBs] PCB how to ? for India


  Dear Friends,
  I am trying to setup a small prototyping facility for testing my designs.
  Usually my designs are single sided,until now I used to make it using
  OHP marker pens and FeCl as etchants as these things are easily
  available in India.

  Since this technic requires an artistic hand and has zero
  repeatability ( for at least 2-3 boards) I want to use photo etch method.

  I tried transferring the artwork by screen printing (silk screen),it
  is a popular method for visiting cards here, on copper clad, but
  there were lot of pinholes.

  I tries tone transfer but my printers are all 600dpi laser again I get
  pinholes.

  Now since I can get the films done easily I want to understand how to
  do photo etch without a pre-sesitized board which is not available here.

  Can anyone help me with the name of the photoresist that I can find
  here in India?

  Any help is appreciated.
  Awaiting for your replies

  Thanking you
  Deepak



   

[Non-text portions of this message have been removed]

The Problem with it it is too expensive .
How can I make my own instead ?

Thank you
Deepak

--- In Homebrew_PCBs@yahoogroups.com, "Stig Ankjær Pedersen" <sap@...>
wrote:
>
> Hi Kashyap
> 
> I just checked and it seems that you have a local RS-components in
india. www.rsindia.com.
> They should be able to supply you with anything you need in that
perspective.
> 
> Kindest Regards.
> 
> Stig.
> 
> 
>   ----- Original Message ----- 
>   From: Kashyap Deepak 
>   To: Homebrew_PCBs@yahoogroups.com 
>   Sent: Sunday, January 21, 2007 11:05 AM
>   Subject: [Homebrew_PCBs] PCB how to ? for India
> 
> 
>   Dear Friends,
>   I am trying to setup a small prototyping facility for testing my
designs.
>   Usually my designs are single sided,until now I used to make it using
>   OHP marker pens and FeCl as etchants as these things are easily
>   available in India.
> 
>   Since this technic requires an artistic hand and has zero
>   repeatability ( for at least 2-3 boards) I want to use photo etch
method.
> 
>   I tried transferring the artwork by screen printing (silk screen),it
>   is a popular method for visiting cards here, on copper clad, but
>   there were lot of pinholes.
> 
>   I tries tone transfer but my printers are all 600dpi laser again I get
>   pinholes.
> 
>   Now since I can get the films done easily I want to understand how to
>   do photo etch without a pre-sesitized board which is not available
here.

> 
>   Can anyone help me with the name of the photoresist that I can find
>   here in India?
> 
>   Any help is appreciated.
>   Awaiting for your replies
> 
>   Thanking you
>   Deepak
> 
> 
> 
>    
> 
> [Non-text portions of this message have been removed]
>

Just a thought.

It seems you have access to making a film. If you have an access to a 
printing press company, they have what is called a manual "wipe-on" 
sensitizer for sensitizing offset aluminum plate. I am not sure whether this 
will work with a copper pcb.

Also, there is another process in metal etching wherein you can photo-etch 
zinc or copper plate for hot-foil stamping or dry-embossing. If I am not 
mistaken, the manual photo-sensitizer is something like a polyvinyl chloride 
(the much, much older process uses something like the egg albumen).

These info were something from my 20 years ago memory and it is already a 
bit hazy. Try to google information for metal etching and you may find the 
correct info.

WT

----- Original Message ----- 
From: Kashyap Deepak
To: Homebrew_PCBs@yahoogroups.com
Sent: Friday, January 26, 2007 3:51 PM
Subject: [Homebrew_PCBs] Re: PCB how to ? for India


The Problem with it it is too expensive .
How can I make my own instead ?

Thank you
Deepak

--- In Homebrew_PCBs@yahoogroups.com, "Stig Ankj\ufffdr Pedersen" <sap@...>
wrote:
>
> Hi Kashyap
>
> I just checked and it seems that you have a local RS-components in
india. www.rsindia.com.
> They should be able to supply you with anything you need in that
perspective.
>
> Kindest Regards.
>
> Stig.
>
>
> ----- Original Message ----- 
> From: Kashyap Deepak
> To: Homebrew_PCBs@yahoogroups.com
> Sent: Sunday, January 21, 2007 11:05 AM
> Subject: [Homebrew_PCBs] PCB how to ? for India
>
>
> Dear Friends,
> I am trying to setup a small prototyping facility for testing my
designs.
> Usually my designs are single sided,until now I used to make it using
> OHP marker pens and FeCl as etchants as these things are easily
> available in India.
>
> Since this technic requires an artistic hand and has zero
> repeatability ( for at least 2-3 boards) I want to use photo etch
method.
>
> I tried transferring the artwork by screen printing (silk screen),it
> is a popular method for visiting cards here, on copper clad, but
> there were lot of pinholes.
>
> I tries tone transfer but my printers are all 600dpi laser again I get
> pinholes.
>
> Now since I can get the films done easily I want to understand how to
> do photo etch without a pre-sesitized board which is not available
here.

>
> Can anyone help me with the name of the photoresist that I can find
> here in India?
>
> Any help is appreciated.
> Awaiting for your replies
>
> Thanking you
> Deepak

Just a thought.

It seems you have access to making a film. If you have an access to a 
printing press company, they have what is called a manual "wipe-on" 
sensitizer for sensitizing offset aluminum plate. I am not sure
whether this will work with a copper pcb.

Also, there is another process in metal etching wherein you can
photo-etch zinc or copper plate for hot-foil stamping or
dry-embossing. If I am not mistaken, the manual photo-sensitizer is
something like a polyvinyl chloride (the much, much older process uses
something like the egg albumen).

These info were something from my 20 years ago memory and it is
already a bit hazy. Try to google information for metal etching and
you may find the correct info.

WT


--- In Homebrew_PCBs@yahoogroups.com, "Kashyap Deepak"
<kashyap_deepak@...> wrote:
>
> The Problem with it it is too expensive .
> How can I make my own instead ?
> 
> Thank you
> Deepak
> 
> --- In Homebrew_PCBs@yahoogroups.com, "Stig Ankjær Pedersen" <sap@>
> wrote:
> >
> > Hi Kashyap
> > 
> > I just checked and it seems that you have a local RS-components in
> india. www.rsindia.com.
> > They should be able to supply you with anything you need in that
> perspective.
> > 
> > Kindest Regards.
> > 
> > Stig.
> > 
> > 
> >   ----- Original Message ----- 
> >   From: Kashyap Deepak 
> >   To: Homebrew_PCBs@yahoogroups.com 
> >   Sent: Sunday, January 21, 2007 11:05 AM
> >   Subject: [Homebrew_PCBs] PCB how to ? for India
> > 
> > 
> >   Dear Friends,
> >   I am trying to setup a small prototyping facility for testing my
> designs.
> >   Usually my designs are single sided,until now I used to make it
using
> >   OHP marker pens and FeCl as etchants as these things are easily
> >   available in India.
> > 
> >   Since this technic requires an artistic hand and has zero
> >   repeatability ( for at least 2-3 boards) I want to use photo etch
> method.
> > 
> >   I tried transferring the artwork by screen printing (silk screen),it
> >   is a popular method for visiting cards here, on copper clad, but
> >   there were lot of pinholes.
> > 
> >   I tries tone transfer but my printers are all 600dpi laser again
I get
> >   pinholes.
> > 
> >   Now since I can get the films done easily I want to understand
how to

> >   do photo etch without a pre-sesitized board which is not available
> here.
> > 
> >   Can anyone help me with the name of the photoresist that I can find
> >   here in India?
> > 
> >   Any help is appreciated.
> >   Awaiting for your replies
> > 
> >   Thanking you
> >   Deepak
> >