Electronics Forum: stencil (Page 208 of 540)

Metal foil is pulling away from the screen.

Electronics Forum | Mon Feb 19 14:17:21 EST 2001 | bschreiber

Hi Mark, If you are a user of stencils, you already know that there are literally hundreds of stencil manufacturers out there. If you found one that will allow such hot temperatures, I would be interested in learning who it is. However, I have only

Re: Aperture Reduction for QFP (fine pitch)

Electronics Forum | Tue Sep 21 08:49:59 EDT 1999 | Chad Notebaert

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 lasercut stencils with 15% redu

Re: screen printer x axis

Electronics Forum | Fri Sep 17 15:43:08 EDT 1999 | Dave F

HI everyone, We are using a Siemens ap-25 screen printer, in the past we have not had any problems with adhesive placement until a couple of weeks ago. It seems the x axis has decided that it should be set somewhere between .00085 and .001

Re: screen printer x axis

Electronics Forum | Fri Sep 17 21:25:00 EDT 1999 | Rob

HI everyone, We are using a Siemens ap-25 screen printer, in the past we have not had any problems with adhesive placement until a couple of weeks ago. It seems the x axis has decided that it should be set somewhere between .00085 an

Re: Srceen Printing control parameters

Electronics Forum | Thu Aug 12 22:31:10 EDT 1999 | Dave F

Hello, Can any netters suggest what critical parameters should be considered & what are there assoicated impacts for a solder paste printing process ... B.Regards, Felix Felix: There are some 30 variables that affect SMT solder qua

Re: Stencil screen cleaners

Electronics Forum | Fri Jul 23 09:17:30 EDT 1999 | Earl Moon

Dear Jason, Smart Sonic has over 500 stencil cleaners in operation around the world. The Smart Sonic Stencil Cleaning Process is the only cleaning process that is Certified Environmentally Safe by the Environmental Protection Agency (EPA) and ve

Re: Epoxy printing and wave soldering on 0603 and 0402 components

Electronics Forum | Fri Jul 16 03:11:23 EDT 1999 | SPEZZAFERRI Luca

Hi, I need some urgent informations on stencil design guidelines on how to perform epoxy printing on 0603 and 0402 components. Could anyone help? ( Reflow process is not possible because of some other constriants) Sec

Re: problem in micro-BGA assembly

Electronics Forum | Thu Jun 24 13:12:15 EDT 1999 | MD Cox

Dear guys, I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are now usin

Re: problem in micro-BGA assembly

Electronics Forum | Thu Jun 24 15:58:46 EDT 1999 | Adam Pratt

Dear guys, I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are no

Re: BGA's - Re-ball -- How thick?

Electronics Forum | Tue May 18 14:15:59 EDT 1999 | Scott McKee

What is the best way to re-ball a BGA? Who has the best system for doing it? I'm using our SRT rework stuff to reball in house - when necessary. Of course, we only do this for protos and test boards. We use a standard micro-stencil, after


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