Electronics Forum: stencil (Page 147 of 540)

SOT-23's Stencil Geometry

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

Re: Aperture Reduction for QFP (fine pitch)

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

Re: MicroBGA printing problem

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

gerber data vs bare board

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

Re: Stencil screen cleaners

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

Re: Stencil screen cleaners

Electronics Forum | Fri Jul 23 15:47:31 EDT 1999 | C.K.

Does anyone have any experiences with EMC stencil screen cleaners or can you recommend a good one? SMarTsonic makes an excellent cleaner. As Bill states, it uses ultrasonics and an EPA approved detergent to wash stencils and boards. However,

Re: Stencil screen cleaners

Electronics Forum | Fri Jul 23 15:49:35 EDT 1999 | C.K.

Does anyone have any experiences with EMC stencil screen cleaners or can you recommend a good one? SMarTsonic makes an excellent cleaner. As Bill states, it uses ultrasonics and an EPA approved detergent to wash stencils and boards. However,

Alpha's Tetra Stencil System

Electronics Forum | Sun Jun 13 18:16:10 EDT 1999 | jgodfrey

I am looking into Alpha's system, and would appreciate some feedback from anybody using it currently. I am concerned about about the life expectancy of the foils if they are clamped and unclamped every couple of days, and what happens if one of the a

Re: electroformed stencils

Electronics Forum | Thu Jun 03 10:00:40 EDT 1999 | Earl Moon

Hi everybody, Somebody know the advantages of electroformed stencils on laser cut stencils ? any coment is apreciated. thanks Al We use electroformed when xtra or very fine pitch devices are involved. Very expensive propos

Re: electroformed stencils

Electronics Forum | Thu Jun 03 17:36:38 EDT 1999 | Dave F

.020" pitch spacing. Which have yielded my process excelent results. My main stencil supplier is I-Source in Irvine, CA and has pretty much standardized on 100% lazer cut stencils for competetive pricing. Hope this helps. Deon Nungaray SM


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