PCB Photoresist Searching in India

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shivkrish39

Joined: 19 Mar 2006
Posts: 10

24 Mar 2006 19:11 photoresist pcb

HI,

I am from india. I would like to try the Photoresist PCB method. In India neither Photoresist spray nor chemicals available.

Anybody from india, please help gtting photoresist spray in india or any alter method.

I am not interested in heat transfer method since no printable sheet in india giving results.

thks.
Shiveni........

IanP

Joined: 05 Oct 2004
Posts: 6492
Helped: 1542
Location: West Coast

25 Mar 2006 0:25 pcb photo resist

It is difficult to imagine that you can't get something in India ..

Try, for example, RS-Components & Controls (India) Ltd.
www.rsindia.com

Part number: 198-9651
http://www.rssingapore.com/cgi-bin/bv/search/SearchDisplay.jsp?BV_SessionID=@@@@0034747798.1143242877@@@@&BV_EngineID=cccladdhfmigfjlcefeceefdffhdgmk.0&SearchType=quick&viewType=text&SearchText=198-9651&quickSubmit=Go

Regards,
IanP

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vikadik

Joined: 03 Dec 2004
Posts: 61
Helped: 4

25 Mar 2006 2:12 pcb photoresist

Well r u sure what you want to do

If you select the wrong type you might find things going wrong and anyway rsindia is very costly. Another place one can try is the lajpatrai market in delhi

centiago

Joined: 30 Sep 2005
Posts: 177
Helped: 13
Location: Lions Den

25 Mar 2006 8:51 pcb photoresist spray

Hi,

I think all major cities where PCB is manufactured should have vendors dealing with raw materials.
You can make BLACK BOX using UV tubelights, electrical connection is same like your normal tubelight. The same box can be used for EPROM erasing.

Ferric chloride (for etching) are readily available.

Here's a link that deals with PCB Manufacturing process. http://www.ee.cuhk.edu.hk/~ymfung/ppp/etching.html

I wonder how will you do solder mask & tin plate the PCB.

Good Luck

shivkrish39

Joined: 19 Mar 2006
Posts: 10

25 Mar 2006 16:51 how to make photoresist pcb

thanks guys....

I have two choices=== one is RS components and the other one is farnell.

But very costly.

I am now tring offset printing method...

technova sesitizer a&b and apply to copper clad board.
expose to sunlight with negative film....
devoloping the image with nova black diamond..

any other method similar to this available?.....

shivkrish39

Joined: 19 Mar 2006
Posts: 10

26 Mar 2006 5:36 ph4 photoresist

hi,

any offset plate printing method available?

anybody has used PH4 method?.. if yes please give me some details.....

anybody from Coimbatore?..

kasamiko

Joined: 23 May 2004
Posts: 83

27 Mar 2006 10:46 make pcb photoresist

I'm using a positive photo resist pcb and a good sunlight to exposed it and been having a good result..

I'm using a KINSTEN Presensitized Positive (+) Acting PCB.

a 4x6" single-sided board cost about US$2.0..

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shivkrish39

Joined: 19 Mar 2006
Posts: 10

27 Mar 2006 14:05 positive resist pcb

Hai guys,

I have tried Photo sensitizer a&b with devoloper used for offset printing.

The first phase was successful. after exposed to sun light & devoloping the circuit tracks are perfectly devoloped in the PCB.

after cleaning with running water when putting into ferric chloride sul. every things were washed out (all tracks ).

any solution to remove only Cu part or any alternate to Ferric chloride?...

i think the sensitizer is not etch resistant..if this part works fine i think we can make very profesional PCBs in low cost.( sensitizer Rs50 (for 100ml)+ devoloper Rs 250 (for 1 litter) )

platonas

Joined: 14 Aug 2004
Posts: 165
Helped: 5
Location: Universal Citizen

31 Mar 2006 11:42 dry flim pcb india

shivkrish39,
It seems that you overexposed your PCB. In direct sunlight you need around 12 seconds of exposure.

Another one thing I noticed, you didn't mention NaOH (caustic soda) usage after exposing the board to sunlight. This is used to fix your possitive spray.

Regards
P.

shivkrish39

Joined: 19 Mar 2006
Posts: 10

01 Apr 2006 17:38 kinsten presensitized pcb

Hi,

but i have tried different timings starting from 10s to 3 mins.

Since i have used photo sensitizer a&b used for Offset printing plates i used black diamond devoloper for devoloping. after the image devoloped in the PCB i tried to put it in Ferric chlorid but it reacts with the complete PCB.

ahmad_abdulghany

Joined: 12 Apr 2005
Posts: 1369
Helped: 212
Location: Cairo, Egypt

07 Apr 2006 7:48 photoresist positive pcb

I tried many times to make a PCB using Positive 20 photo resist but everytime i got bad results,

I hated to use Photo resist,

and i am looking for a low cost solution away from the Peers N Pell sheets and photo resist..

Any suggestions?!

rajudp

Joined: 27 May 2006
Posts: 239
Helped: 10
Location: India

03 Jan 2007 11:28 positive photoresist pcb

i am using dry film photoresist and give good results

shiveni

Joined: 06 Feb 2005
Posts: 31

04 Jul 2009 8:51 presensitized board in india

hai I am trying to get Dry Flim Photoresist in india. Can anybody help in getting it in small quentity.

Shiva...
microkid.co.cc

rajudp

Joined: 27 May 2006
Posts: 239
Helped: 10
Location: India

15 Aug 2009 19:07 how to make pcb photoresist

if you want only small qty i an help

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15 Aug 2009 19:07 Ads

mvs sarma

Joined: 23 Apr 2006
Posts: 381
Helped: 36
Location: Hyderabad, India.

26 Aug 2009 17:19 how to make a photoresist pcb

shiveni wrote:

hai I am trying to get Dry Flim Photoresist in india. Can anybody help in getting it in small quentity.

Shiva...
microkid.co.cc

pre-sensitized boards can perhaps be bought either from RS Controls India or from Farnell India.
the spray could not be obtained when ordered, as air flying of hazardous material is not approved.
Of course, the possible best id TTS method. and it works as I made few boards.

No point in spending a moon unless you specifically need it. In few such cases , I feel , it would be better to do all your work, even make positive and negative films , and let a local manufacturer make few boards like 5, for you.

mvs sarma

Joined: 23 Apr 2006
Posts: 381
Helped: 36
Location: Hyderabad, India.

20 Sep 2009 8:54 signs of bad photoresist

rajudp wrote:

if you want only small qty i an help

is it positive or negative resist film, Rajudp ?

FvM

Joined: 22 Jan 2008
Posts: 5162
Helped: 767
Location: Bochum, Germany

20 Sep 2009 9:52 positive resist pcb sun exposure time

As far as I know, only photo-positive resists have been used for PCB prototyping sinces decades.
The coated PCBs available from catalog distributors are exclusively of this type.

endril

Joined: 07 Sep 2009
Posts: 1

20 Sep 2009 18:50 photoresist pcb

A good alternative (i think cheep too) is a print of your layout with copier printer(laser - toner) to a glossy paper and termicaly transfered on your coper board with a common clothes iron. Search on the web or ask fore more details.

Sorry if is off topic. --- SPEED !

rajudp

Joined: 27 May 2006
Posts: 239
Helped: 10
Location: India

20 Sep 2009 19:29 positive pcb spray

dear mvs sarma
it is a negative working one laminar 5038

mvs sarma

Joined: 23 Apr 2006
Posts: 381
Helped: 36
Location: Hyderabad, India.

21 Sep 2009 6:17 positiv 20 expose pcb

rajudp wrote:

dear mvs sarma
it is a negative working one laminar 5038

Thanks Raju jee

@endril, I have been already doing the toner transfer system reasonably well.

@FvM-- The dry transfer films used by industry to make prototypes, are generally negative, and i saw them being used by PCB manufacturers. with that in mind, I was asking Rajudp.

bepobalote

Joined: 19 Mar 2005
Posts: 72
Helped: 11
Location: Europe

21 Sep 2009 10:16 uv photoresist india

At home I make my PCB prototypes using a NEGATIVE Dry Film very similar to this one (different exposure sensitivity: 35mj):
Series 900
PDF

With film made on a Postscript printer* instead of a Gerber plotter and this type of Photoresist, I can get 6mils traces without any problem.

*) Agfa, Linotype, Scitex, ...

Just as an example of the procedure, see: http://www.instructables.com/id/Killer-PCBs/

P.S. you have to render the printer output "negative"!

Last edited by bepobalote on 21 Sep 2009 13:54; edited 2 times in total

idea_factory

Joined: 21 Sep 2009
Posts: 2
Location: Guangzhou,China

21 Sep 2009 12:47 technova sesitizer a&b

Hi,
We are from China manufacturing of spray etching machines, We have developed a solution of liquid photo resist in a laboratory here for our etching customers, as photo resist from USA and other countries are very expensive
This resist has a capability to expose even a hairline, as we sell double side exposure machines also for double side PCB we can expose both sides with this Photo Resist.
We are selling this in India, for pricing and details mail us at sales(at)ideafactory.co.in
Regards
Wadhwa Ajay
Director
Idea Factory Equipments (P) Ltd

mvs sarma

Joined: 23 Apr 2006
Posts: 381
Helped: 36
Location: Hyderabad, India.

21 Sep 2009 15:33 photoresist spray for pcb

idea_factory wrote:

Nice Ajay jee !!
First time we are seeing this type product in India . perhaps you would be the first, if you have plan to make and sell sensitized PCBs as many hobbyists would like to have for critical layouts. This effort may be in addition to your normal business line.

Is it sold in small aerosol cans please?

idea_factory

Joined: 21 Sep 2009
Posts: 2
Location: Guangzhou,China

22 Sep 2009 18:41 photoresist positive 20

This is avialble in thick liquid form, Coaing can be applied using screen frame as shown in bakground of pic
We also have thiiner density solution to be used with compressor and spray, but it would not suit you, as most of you are into hobby and we do not sell less then 1 kg,
Aerosol can is not practical for production and all of our customer concern is costing and production

About sensitised PCB will be a very small business, but using our resist you can put the resist yourself

For those who are not aware , Our resist has a shelf life of 6 months
Regards
WA

mvs sarma

Joined: 23 Apr 2006
Posts: 381
Helped: 36
Location: Hyderabad, India.

23 Sep 2009 4:14 presensitized positive pcb

Thanks for the information Wadhwa Ajay jee.

shiveni

Joined: 06 Feb 2005
Posts: 31

03 Oct 2009 19:50 Re: how to make pcb photoresist

idea_factory wrote:

Hai Wadhwa Ajay jee,

I am interested in this product. Is it possible to have any sample qty to try out.

Can you please provide the price for this product.

Shiveni....

Microkid.co.cc

Added after 1 minutes:

rajudp wrote:

if you want only small qty i an help

Hai rajudp

Yes a small qty is enough to try out. Can you please help me in getting this DRY Flim.

rajudp

Joined: 27 May 2006
Posts: 239
Helped: 10
Location: India

04 Oct 2009 2:57 PCB Photoresist

mail me your address

shiveni

Joined: 06 Feb 2005
Posts: 31

04 Oct 2009 17:42 Re: PCB Photoresist

rajudp wrote:

mail me your address

Dear Rajudp,

Thanks for your lightning fast reply.

My address:

Shivashanmugam,
Microkid
room no.23, First floor,
VMC complex,
50 Sathy Road,
Veerappan chatram,
Erode - 638004
Tamil nadu
India

eagerly waiting for your reply.