Electronics Forum | Mon Jan 17 08:09:05 EST 2000 | Mark Anderson
As stated previous, the following elements all have a effect on solder beading. Solder Paste, stencil apertures(reduction of home plate), stencil thickness, printing parameters, placement height, reflow preheat and soaking slope and dwell, manufactur
Electronics Forum | Thu Jan 13 13:51:37 EST 2000 | Michael Uganecz
Hello, I'm doing some research on frameless stencils/stencil frames and I'm looking for people's thoughts on them. I'm looking for any and all thoughts/opinions on how well they work or don't work. Some specific areas of interest: tensioning in one
Electronics Forum | Mon Nov 29 13:09:12 EST 1999 | Mike Konrad
There are three primary methods of stencil cleaning. � Hand Cleaning � Spray-In-Air Cleaning � Ultrasonic Cleaning Hand Cleaning: Hand cleaning involves the removal of solder paste or adhesives from stencils using a chemically saturated wipe and /
Electronics Forum | Tue Nov 30 23:00:11 EST 1999 | Ricky L. Price
Bill S. is correct on the positive effects of the Smartsonic 440-R SMT detergent. We have been using this in conjunction with a Smartsonic 4200-2D ultrasonic washer that is equipped with a tank heater set at 100'F. Our suggested process window to p
Electronics Forum | Mon Nov 15 12:09:55 EST 1999 | Dave F
Steve: Continuing with Dan�s thinking, generally, "poor release" (paste hanging-up in the stencil holes) could have three main (or combination of) causes: 1 Equipment: Stencil is too thick. Specifically, your 0.006 should be OK, providing you don�
Electronics Forum | Wed Oct 06 10:31:05 EDT 1999 | Chris May
Hopefully, everybody suffers from solderability of SOT-23 devices and I would like to know how everybody else resolves this problem. Historically, here, we have always gone for 6 thou stencils. I found that going to an 8 thou stencil improved the sit
Electronics Forum | Thu Sep 30 06:47:51 EDT 1999 | park kyung sam
| My stencil thickness is 6 mil and we got qfp's with fine pitch. | how many percent should i reduce my stencil aperture using a 6 mil stencil for 0.5 mm pitch and 0.4 mm pitch ? | | thanks | we have placed 16 mil components for 3 years. why don't
Electronics Forum | Tue Sep 21 13:43:33 EDT 1999 | Glenn Robertson
| I've had some trouble pasting a test board for a MicroBGA trial. Most of the paste remains in the stencil apertures. | The stencil is 6 mil thick, laser cut and electo-polished. | The apertures are 12 mil in diameter with 20 mil pitch. | We are usi
Electronics Forum | Sun Sep 12 09:40:04 EDT 1999 | Wayne S.
hello having a problem with one customers bare boards not matching my stencil apertures. i design stencils based on gerber data and reduce up to 15% on some pads. do some board houses reduce pads after receiving gerber data???why would they do that
Electronics Forum | Thu Jul 22 15:16:40 EDT 1999 | Mike Konrad
Stencil cleaner manufacturers that (in our opinion) build quality machines: Aqueous Technologies (800) 218-8128 (that's us) Branson (203) 796-0400 EMC (215) 340-0650 Austin American (512) 335-6400 Questions??? Call me at (800) 218-8128 and
