Electronics Forum: stencil (Page 161 of 540)

Re: uBGA Stencil Thickness

Electronics Forum | Mon Dec 21 17:50:55 EST 1998 | anamonus

I have a mixed technology board ranging from 50 mil pitch devices to 20mil Qfp's to PBGA-352 at 1.27mm, and 6 Intel uBGA-48 at 30 mil pitch. With all these different package types i'm torn between using a 4 or 5mil thick stencil. The ball dia. is 1

Re: polyimide stencils

Electronics Forum | Sat Nov 14 08:58:38 EST 1998 | Earl Moon

I keep hearing about polyimide stencils, but what are they like in terms of registration and aperture accuracy? You are hearing about polyimide as in polyimide film as Kapton (TM Dupont). This material is the stuff of flex and rigid/flex circuit

Re: printing

Electronics Forum | Mon Jun 29 13:38:20 EDT 1998 | Russ Miculich

looking for help with fine-pitch printing for what would be the best settings for printing speed, squeegee pressure, seperation speed. thanks for you time Brian: As Justin says - the issues are many. However, a good start would be to run at 0.75

Re: Polyimide See Thru Stencils for Printing Solder Paste

Electronics Forum | Thu Jun 25 09:13:25 EDT 1998 | Brad Stapley

Has anyone seen/used these yet? They seem to have lower coefficient of friction for release of paste and less wear and tear as well as conforming to the board better (plastic has better memory than stainless). Also there is no mesh so a larger ima

Re: Polyimide See Thru Stencils for Printing Solder Paste

Electronics Forum | Mon Jul 13 11:38:16 EDT 1998 | Steve Gregory

Zulfiqar, The company that makes these stencils is a Canadian company named KJ Marketing (I'll paste a link to the web site in this message). It sounds pretty interesting. I've communicated with a few people that have used these stencils and the

Screen printing the board from........

Electronics Forum | Wed Mar 04 21:24:04 EST 1998 | Ron Costa

Hello everyone! Does any know anything about bare board size variations? Is there a spec. or tolerance? I'm running small lots of boards and during the screen printing process I find that I cannot paste each board perfectly.I've tried other screen pr

Conergo�s New name?

Electronics Forum | Mon Aug 27 15:01:48 EDT 2001 | davef

Alternately, would you like suggestions? There are plenty of quality stencil suppliers over there in the US.

Stencil Inspection Equipment

Electronics Forum | Thu Aug 30 15:01:36 EDT 2001 | kerryn

Thank you Michael, Rob, Jones and Arzucom. The rest of you need to get a life! Kerry

CCGA and overprinting?

Electronics Forum | Fri Oct 12 09:17:12 EDT 2001 | mikecampbell

Hello, I need some advice. I want to create apertures in my stencil for a IBM CCGA. I've heard the standard is 4800 cubic mils of paste per aperture. I usually use a 5mil stencil for this type of product. There is no way I'll get enough paste wit

Adhesive Dispense Equipment

Electronics Forum | Fri Oct 26 17:05:18 EDT 2001 | davef

Consider a stencil printer [ie, MPM, DEK, Ekra, Minami] to print your adhesive.

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