Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Russ M

#15292

Polyimide See Thru Stencils for Printing Solder Paste | 23 June, 1998

Has anyone seen/used these yet? They seem to have lower coefficient of friction for release of paste and less wear and tear as well as conforming to the board better (plastic has better memory than stainless). Also there is no mesh so a larger image can be put in a smaller stencil size. But, the best is that you can see through the stencil for manual and semi-automatic printer alignment and reduce set up and changeover times. Anyone familiar with these? How long do they last?

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EC

#15297

Re: Polyimide See Thru Stencils for Printing Solder Paste | 23 June, 1998

| Has anyone seen/used these yet? They seem to have lower coefficient of friction for release of paste and less wear and tear as well as conforming to the board better (plastic has better memory than stainless). Also there is no mesh so a larger image can be put in a smaller stencil size. But, the best is that you can see through the stencil for manual and semi-automatic printer alignment and reduce set up and changeover times. Anyone familiar with these? How long do they last?

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Brad Stapley

#15294

Re: Polyimide See Thru Stencils for Printing Solder Paste | 25 June, 1998

| Has anyone seen/used these yet? They seem to have lower coefficient of friction for release of paste and less wear and tear as well as conforming to the board better (plastic has better memory than stainless). Also there is no mesh so a larger image can be put in a smaller stencil size. But, the best is that you can see through the stencil for manual and semi-automatic printer alignment and reduce set up and changeover times. Anyone familiar with these? How long do they last? Who is the manufacturer of these stencils? My group would be interested in learning more about these. If you could send me an E-Mail with the info I would appreciate it.

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John Parsons

#15293

Re: Polyimide See Thru Stencils for Printing Solder Paste | 25 June, 1998

This type os stencil is available from: KJ Marketing Services 115-30th St. Toronto, Ontario, M8W 3C1 Phone: (416) 252-1061 Fax: (416) 253-1687 email: mail@kjmarketing.com Web Site: www.kjmarketing.com

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ZULFIQAR

#15295

Re: Polyimide See Thru Stencils for Printing Solder Paste | 9 July, 1998

Dear Russ, What is the information source for this type of stencils? Did you get any info about the manufacturers and also any feed back from users? How widely it is used will give us a data w.r.t. its validity.Will you be kind enough to send the info available so far? Thanks. ZULFIQAR

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Steve Gregory

#15296

Re: Polyimide See Thru Stencils for Printing Solder Paste | 13 July, 1998

Zulfiqar, The company that makes these stencils is a Canadian company named KJ Marketing (I'll paste a link to the web site in this message). It sounds pretty interesting. I've communicated with a few people that have used these stencils and they can't say enough good things about them. They laser cut the apertures, and because of the properties of the polyimid, the sidewalls wind up perfectly smooth, unlike stainless steel. Also as evrybody has heard, because you can see through them set-up is much easier. The other advantage I've heard is that you get better gasketing from the stencil because polyimid is more compliant to the PCB surface than stainless is. It's pretty durable too, everybody that I know is using them say they're using metal squeegees. This company also makes something else that I'm going to look into; wireless ICT fixtures...pretty neat huh? -Steve Gregory-

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