Electronics Forum: stencil thickness (Page 7 of 90)

Masking up stencil

Electronics Forum | Fri Apr 29 18:48:03 EDT 2022 | proceng1

Kapton works great, but note that Kapton is about 2.5 mils thick, so if you are placing it near other apertures, you are essentially adding to the thickness of your stencil. I've also used some Kapton near parts that need a bit more paste, like co

measument of paste thickness after Screen Printing

Electronics Forum | Tue Sep 07 09:53:37 EDT 2004 | rob

Hi Dhanashekar, I'm with Chris on this one, unless you are carrying out 0201 or ultra fine pitch placement it's a helpful but not critical tool. We found most print errors were avoided using the 2D vision on the printer, combined with plenty of aut

Solder paste thickness measurement with laser machine

Electronics Forum | Thu Feb 23 09:59:09 EST 2006 | SIR

We have an AUREL CS1222 machine to measure the thickness of the solder paste deposited on a bare board by a stencil printer. This device has a laser beam that has to be put on the pad where you want to measure the solder paste thickness. The measure

Mosfet stencil design

Electronics Forum | Thu Jul 21 09:43:10 EDT 2005 | davef

We agree with Russ. The solderballs are probably the result of printing too much paste on the board. In designing your 5 thou thick stencil: * Aperatures for the pads should be identical to a IPC-7351 - SO8 [or worst case http://www.vishay.com/docs

Re: stencil condition

Electronics Forum | Thu Jan 07 08:13:33 EST 1999 | Earl Moon

| What kind of equipment are you using to gauge the thickness of your stencil after it's used for some months? How to determin the condition of the stencil? Your input is much appreciated. | | Ken Mok, based in Shenzhen, China. | | | Overarm micr

Inspecting a new stencil

Electronics Forum | Mon Feb 18 11:31:02 EST 2008 | davef

Print paste through the new stencil with a piece of mylar [or other clear plastic sheet about the thickness of paper] between the board and the stencil. Dispose of the mylar according to local practice after confirming proper aperturation of the sten

mirco bga stencil opening

Electronics Forum | Wed Sep 25 11:11:14 EDT 2002 | xrayhipp

Try .005 or even .004 thick laser cut electopolish stencil and reduce grain size of paste. Go with 400 or 25 in the case of AIM. We had a similar prob.

Re: stencil condition

Electronics Forum | Sun Jan 17 03:17:38 EST 1999 | thebear

| What kind of equipment are you using to gauge the thickness of your stencil after it's used for some months? How to determin the condition of the stencil? Your input is much appreciated. | | Ken Mok, based in Shenzhen, China. | | | you ensure t

Step stencil troubles

Electronics Forum | Fri Sep 17 09:31:17 EDT 2004 | russ

Step stencils are used but only when necessary. One reason to use one would be a PCB with 12 mil pitch and very large coils or something of that nature. The 12 mil pitch part would require a 4 mil thick stencil to ensure release while it would caus

Squeegees for Step-Down stencil

Electronics Forum | Mon Nov 25 12:32:20 EST 2002 | davef

Now that is a BIG step. Stencil type: * A metal squeegee is fine with stepped stencils. * A rubber squeegee is fine with stepped stencils. Comments on step stencil "keepouts" are: * Use an ample space around the stepped down component pads that is


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