Electronics Forum: 800 (Page 58 of 68)

Question about solder masking BGA vias...

Electronics Forum | Sat Sep 18 12:10:19 EDT 2004 | Steve Gregory

I have a question about solder masking via's in a BGA pattern, and want to see if I'm thinking correctly about this. This problem is kind of along the same line as Carol's problem earlier. I think it's a bad idea to leave the via's free from solder

What do you thing about new NXT

Electronics Forum | Sun Oct 10 00:47:01 EDT 2004 | Grant

Hi, I checked one out in Taiwan recently, and they had two NXT systems on the booth. I think they are very exciting, and being able to change the mounter head and camera, and dual lane is good for through put. However each bay is only 20 x 8mm feed

Microscreen stencils

Electronics Forum | Tue Nov 29 12:53:56 EST 2005 | bschreiber

Hello Billy, You are correct when you say that you may want to look at the detergent (chemistry) you're adding to the stencil wash. However, "geared for epoxy removal" depends on how the chemistry is designed to remove the epoxy. If it is a "water

Copper measurement

Electronics Forum | Tue Nov 22 21:08:45 EST 2005 | davef

CMI International says, there are five basic, non-destructive methods of determining coating thickness. Each method was devised to achieve cost-effective, accurate, and repeatable results. Those methods are: * X-Ray fluorescence * Eddy-current * M

First documented case of tin whisker formation

Electronics Forum | Thu May 11 13:28:49 EDT 2006 | patrickbruneel

Being a typically efficient Swiss based company Swatch started the task of RoHS conversion a year ago. After 2 years of intensive research they implemented the process in mass production in June 2005, they started shipping and found massive problem

Hand Solder tips deterioration - No-Lead Pb

Electronics Forum | Wed Jan 03 20:30:11 EST 2007 | mrduckmann2000

We too are having issues with our soldering iron tips. We purchased the new Weller WD series irons which we were told would work just fine with lead-free solder. The Weller unit has changed 3 times in the last year(latest unit is the WD2M series).

Conformal Coat Thickness

Electronics Forum | Mon Jul 23 11:44:40 EDT 2007 | davef

NASA-STD-8739.1, 10.2.3 Thickness Measurements. Thickness measurements shall be made on coupons processed at the same time and under the same conditions as the PWA. The coupon substrate may be any compatible rigid material with a smooth flat surface.

Good Lead-Free soldering Iron???

Electronics Forum | Fri May 02 18:40:03 EDT 2008 | jlawson

Has anyone tried a PS-800E made by OKi Metcal? I > have been looking at them, it looks like a good > Iron, but I would like to know how these are > actually working in the field not just some sales > pitch by someone getting a > commision. Thank

Masking tape

Electronics Forum | Thu Jan 22 11:12:06 EST 2009 | davef

Conformal coating masking: Electronic equipment manufacturer's use conformal coating processes to protect printed circuit modules from moisture, fumes, rapid temperature changes and other environmental conditions. Typically, pressure sensitive tapes

Silver Immersion Finish - Moisture bake out guideline?

Electronics Forum | Fri Apr 23 17:59:54 EDT 2010 | hegemon

Therein lies the issue. Unknown storage conditions before we received the PCBs, date codes just expired (2 weeks), first article is de-lam city! Had a bad feeling about it. Have read some studies showing that there is no linear tie in of visual cha


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