Electronics Forum: under stencil (Page 8 of 44)

Re: about solder bridge

Electronics Forum | Thu Apr 06 02:23:50 EDT 2000 | Marcus

What about your printer and your stencil ? Do you have a problem with misalignment between pcb and stencil ? How often do you clean your stencil during production ? Maybe you have smearing under the stencil because there is a snapoff between stencil

Pad and Stencil Design

Electronics Forum | Tue Sep 18 15:35:23 EDT 2001 | jschake

A laser cut stainless steel stencil was used exclusively for the evaluation of the complete 0201 assembly process, which addressed printing, placement, and reflow. However, I have also conducted off-line 0201 print tests using a nickel electroformed

What method for cleaning a wiped board?

Electronics Forum | Thu May 04 11:37:25 EDT 2023 | proceng1

Thank you. I do feel that the document is very lacking in detail. It mostly says "yes, it needs cleaned. Make sure the cleaning process doesn't screw it up". The majority of boards that get wiped are already populated on the other side. So that lim

Re: FIDUCIALS

Electronics Forum | Sun Oct 18 00:56:19 EDT 1998 | PARK KYUNG SAM

| I AM LOOKING FOR INFORMATION ON A WAY TO REPAIR STENCIL FIDUCIALS TO KEEP THEM SOLID AND AS DARK AS POSSIBLE.SOMETING THAT WOULD BE MORE OF A PERMANENT SOLUTION,I HAVE USED PERMANENT INK BUT IT EVENTUALY WIPES OFF OR FADES... HELLO MR NATE. I WO

SMD Adhesive Testing

Electronics Forum | Thu Dec 12 09:21:42 EST 2002 | blnorman

What we did: *Slump-dot diameter and height as a function of time *Print Speed-Vary speed, measure slump and missing/defects *Green Strength-We quantifiably measured tack vs time and we placed components and measure skew by SVS *Cure profile sensitiv

How to reduce solder joint voids of LED without using vacuum reflow?

Electronics Forum | Mon May 27 04:46:11 EDT 2019 | SMTA-Rogers

Dear CW, Yes, we also tested many different brands and models of solder paste, under the same stencil design and reflow profile the condition of the voids will have great difference.

Stencil Printers

Electronics Forum | Tue Dec 02 23:46:42 EST 2003 | Grant Petty

Hi, I know this must have been asked a lot of times, however I have a "which is the best stencil printer" question. We are on a limited budget of around US$90,000 and we need to get an inline fully automated stencil printer. We have been looking a

Problems with .45 mil ball diameter BGA....

Electronics Forum | Fri Apr 29 17:49:22 EDT 2005 | Woodsmt

I have used many of these devices recently and have used them several times over the last few years. I have been successful using a type 4 paste on a 5 mil stencil. The 13 mil round aperture should provide you with an area ratio just adequate for r

Problems with .45 mil ball diameter BGA....

Electronics Forum | Fri Apr 29 17:49:26 EDT 2005 | Woodsmt

I have used many of these devices recently and have used them several times over the last few years. I have been successful using a type 4 paste on a 5 mil stencil. The 13 mil round aperture should provide you with an area ratio just adequate for r

Squeegee Pressure

Electronics Forum | Fri Feb 12 10:44:02 EST 1999 | Bill Haynes

I am fairly new to the SMT game and I am getting conflicting answers to the following. Maybe someone can help me! When printing, one person is telling me that the stencil should be wiped completely clean of all paste because the quality of the pr


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