Electronics Forum: stencil (Page 321 of 540)

Temperature Profile for 0.2mm Thick ENIG Flex PCB

Electronics Forum | Thu Jan 30 10:12:00 EST 2020 | emeto

More detail Jinesh. Profile, datasheet of the part, stencil design, PCB finish, soldering material. Initially I am assuming you use pallet to reflow 0.2mm thick board.

solution to design challenge (ubga, NSMD pads, heavy traces)

Electronics Forum | Mon Mar 23 16:38:09 EDT 2020 | emeto

Steve, On 16mil pitch I would try 12mil diameter on 5mil stencil, unless the BGA ball size is something unexpectedly huge.

solution to design challenge (ubga, NSMD pads, heavy traces)

Electronics Forum | Fri Mar 27 03:42:17 EDT 2020 | sssamw

Did you try 0.12 or 0.1mm nano coated stencil @ 10 mil aperture? A soak time type profile with long reflow time could help.

SMT Stencil design

Electronics Forum | Thu Mar 19 15:01:00 EDT 2020 | emeto

Overprinting until the solder paste start detaching from the joint and start forming solder balls. Based on finish, chemistry and type solder mask this number will be different.I also wouldn't call it "better solderability".

SMT Stencil design

Electronics Forum | Fri Mar 20 09:29:27 EDT 2020 | slthomas

If you just want a little more paste and don't care where it ends up I guess percentage is OK, but if you're trying control where it ends up it makes sense to specify how far, and in which direction(s).

Need Expert Support

Electronics Forum | Tue Mar 13 16:05:30 EST 2001 | rob_thomas

Hi, can you definitely attribute the 30%yield to poor bga soldering? What is your high flyer defect encountered on the failed boards.Is this ICT ,flying probe ,functional test yield? Can you determine a defect pattern? Did your subcontractor provided

Re: Aperture Reduction for QFP (fine pitch)

Electronics Forum | Tue Sep 21 17:24:58 EDT 1999 | John Thorup

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 use 6 mil lasercu

Re: Aperature opening for epoxy printing

Electronics Forum | Sat Aug 07 11:10:03 EDT 1999 | JohnW

Could someone give recommendation on the stencil opening for printing epoxy on HAL FR4 PCB for 0805 and 0603 size chips capacitors and resisitors. My regular stencil manufacturer recommend the following: Thickness: 8 mils 0805 opening: Oblong

Re: Forum Sales

Electronics Forum | Mon Jul 26 19:18:07 EDT 1999 | Boca

I'm interested in hearing how many forum fans are interested in blatant advertising in the forum pages. At least Mike listed everyone instead of tooting his own horn. Some vendors support sites like these by buying banners and such. How effectiv

Re: Forum Sales

Electronics Forum | Mon Jul 26 20:07:55 EDT 1999 | Rob Fischer

I'm interested in hearing how many forum fans are interested in blatant advertising in the forum pages. At least Mike listed everyone instead of tooting his own horn. Some vendors support sites like these by buying banners and such. How effect


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