Electronics Forum: /03 (Page 1146 of 1347)

BGA rework stencils ( down to 0.65mm pitch)

Electronics Forum | Mon Oct 14 03:14:08 EDT 2002 | msimkin

Hi, Has anyone had expereince in the design or use of mini rework srtencils for uBGA applications? What was the deisgn guide lines used. I am looking to rework 0.7 & 0.65 mm uBGA parts with standard hot air, without split prism placement guides. It i

Wow! Changes...

Electronics Forum | Thu Oct 17 17:12:03 EDT 2002 | stockley

I feel that I should jump in here and say a couple of words in Brian's defense (although he does a good job of that himself). Ken, you're right if you need to explain how a web site works - or any application, for that matter - then you don't have a

Soldering an 18 layer 2oz. copper board

Electronics Forum | Fri Oct 18 16:24:05 EDT 2002 | russ

Big BIG BIGG wave with a lot of preheat capability both top and bottom. You may need to exceed the standard "100 C" top side preheat to 120C or so (be aware of any topside SMT going into reflow over the wave). A spray fluxer with very fine atomizati

extra zeros very confusing....

Electronics Forum | Tue Oct 22 13:28:03 EDT 2002 | slthomas

Brian, Since the change, I have seen numerous instances of extra zeros being added to numeric values, typically those of 3 (original) characters or more. Case in point, a contribution by our friend Mr. Fish that I have cut and pasted: "The steadfa

PCB Pad lifted - repair

Electronics Forum | Thu Nov 14 10:03:40 EST 2002 | davef

Doug, Ooooooooo. You're correct Vinny has to be talking about Rogers teflon boards. Vinny, There are many different types of PTFE based products. Generally speaking, PTFE has a melting point of 620degF and withstands solder reflow and HASL proce

Screen Printers

Electronics Forum | Tue Dec 03 07:57:27 EST 2002 | pjc

Price of DEK 248 and MPM UP100 are about the same, $22-36K range. MPM UP100 has programmable squeegee pressure. Precise, repeatable results with less operator involvement. Pressure parameters saved in board program file. DEK 248 has manual microm

Screen Printers

Electronics Forum | Tue Dec 03 13:35:22 EST 2002 | wpease

Hi Brad, Before I tell you my glove fits your hand, I'd like to see your hand. More specifically I'd like to learn more about your application. Board size range? Component size range? Finest pitch? Degree of warpage? Two-sided? etc. Contact m

Selective soldering pallets and solder balls

Electronics Forum | Tue Dec 03 18:31:45 EST 2002 | slthomas

At the price of Durapol we'd never get the OK to have them made. The Al fixtures are cheap and a quick turn local item. As dense as the pth parts are I also don't think there'd be any room for any holes which I really think is the answer as far a

Amistar

Electronics Forum | Thu Mar 20 12:09:34 EST 2003 | dlynch

Scott (and others), Sorry I didn't see this thread earlier in the year. Contact Amistar with your needs. We continue to be alive and well. Our service organization hasn't skipped a beat through this tough economy. We're staffed to provide Tenryu, I-

0603 - stencil thickness

Electronics Forum | Fri Jan 03 12:01:46 EST 2003 | jax

Alot of the companies out there use Standards developed internally, centered around there paste, equipment, and reflow processes. Normally you will see either 5mil or 6mil stencils used for everything in house with the exceptions of specific boards.(


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