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July 1998

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Subject:
From:
Kathy Palumbo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 6 Jul 1998 10:47:01 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (157 lines)
We use metal blades.  Fiducials are not cut all the way through, just part
way.  Then they fill them with a dark colored epoxy.  I did have change the
video recognition too light to dark for the DEK 265 system to recognize
them, but that was the only change.

Thanks,
Kathy Palumbo

> ----------
> From:         McMonagle, Michael R.[SMTP:[log in to unmask]]
> Sent:         Monday, July 06, 1998 10:23 AM
> To:   [log in to unmask]
> Subject:      Re: [TN] Polyimide See Thru Stencils for Printing Solder
> Paste
>
> What type of blades are you using? How do they mark stencil fiducials,
> full cut through?
>
> Mike McMonagle
> K*Tec Electronics
>
> > -----Original Message-----
> > From: Kathy Palumbo [SMTP:[log in to unmask]]
> > Sent: Monday, July 06, 1998 11:26 AM
> > To:   [log in to unmask]
> > Subject:      Re: [TN] Polyimide See Thru Stencils for Printing Solder
> > Paste
> >
> > Johannes,
> >
> > I have tried this type of stencil.  It was made by a company in Canada
> > called KJ Marketing.  It worked extremely well.  The material is laser
> > cut,
> > and as a result of the heat from the Laser the walls of the apertures
> > are
> > perfectly smooth.  The release of paste was outstanding.  It performed
> > as
> > well or better than a pure nickel stencil.
> >
> > Alignment was made easy due to the ability to see through the stencil.
> >
> > The material can be melted down and used again, and it does not
> > stretch as
> > much.
> >
> > You should try it out yourself and see what you think.
> >
> > Thanks,
> > Kathy Palumbo
> > > ----------
> > > From:         Johannes Sivula[SMTP:[log in to unmask]]
> > > Sent:         Tuesday, June 30, 1998 4:18 AM
> > > To:   [log in to unmask]
> > > Subject:      [TN] Polyimide See Thru Stencils for Printing Solder
> > Paste
> > >
> > > Polyimide See Thru Stencils for Printing Solder Paste
> > >
> > > Following mail was posted by  Russ M on June 23, 1998 at 11:27:37:
> > to
> > > http://www.smtnet.com/smt_forum/smt_mail.html
> > >
> > >           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?
> > >
> > ----------------------------------------------------------------------
> > ----
> > > -
> > > ----------------------------------------------------------
> > > Any comments ?
> > > brs, Johannes
> > >
> > >
> > >
> > > 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: [log in to unmask]
> > > Web Site: www.kjmarketing.com
> > > Regards John Parsons Circuit Graphics Ltd.  [log in to unmask]
> > >
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