Electronics Forum | Tue Nov 01 10:48:24 EST 2005 | Rob
Can't say too much about the solder joints issue, but about a decade ago we did have a lot of problems with resonators being damaged by harmonics from Ultrasonic board washing & Ultrasonic welding. However this mostly manifested itself as cracking i
Electronics Forum | Wed Nov 02 20:42:55 EST 2005 | erokc
Russ, thanks for the explination. Makes sense now. DaveF, where do I get the documents you listed? Why is me username (erokc) for login showing as Author instead of my display name? I've checked my preferences, it's still shows Dave??? Is there
Electronics Forum | Wed Nov 02 21:58:17 EST 2005 | KEN
Copper wire will become thinner when dipped in tin/lead or lead free solder. The copper is disolved off of the bulk wire. This is one reason rework on solder pots must be restricted. Eventually, after repeated cycles you will have smaller and sma
Electronics Forum | Wed Nov 02 11:39:27 EST 2005 | ianlg
Hi We've been given a similar system to trial on our own printers called the 'VacuNest'. It's similar to GelFlex etc and seems to give a very firm support and will hold its shape for months until the vacuum is released. Has anyone else been using
Electronics Forum | Mon Nov 07 12:36:19 EST 2005 | novatec
Hi We've been given a similar system to trial > on our own printers called the 'VacuNest'. It's > similar to GelFlex etc and seems to give a very > firm support and will hold its shape for months > until the vacuum is released. > > Has anyone
Electronics Forum | Thu Nov 03 02:34:46 EST 2005 | Rosewood
We've recently encountered some problems with wire bond strengths. I'm looking for anybody that has had some experience with different types of substrate contamination and methods for cleaning. There is no visible contamination on the gold pads, bu
Electronics Forum | Thu Nov 03 12:48:14 EST 2005 | Rosewood
We have some no sticks, but that is actually a good thing because we have NSD. During process control audits we found that pull strengths to the board dropped off. We build a military application that requires higher bond strenghts. Low pull streg
Electronics Forum | Thu Nov 03 08:34:25 EST 2005 | Slaine
Hi We currently use a small amount of Alloy : 43Sn 43Pb 14Bi Flux: RMA-51AC, Metal : 88.5%. We use it for reworking a product and only consume about 100g per year, we are in the middle or ordering in some more paste but the MOQ is 500g. Is it possibl
Electronics Forum | Thu Nov 03 10:33:04 EST 2005 | Samir Nagheenanajar
I've read all the SMTNet threads available on this topic, been to a couple seminars, and read some articles, and the general consensus seems to be "it can be done, but shouldn't." However, at my company, we have a Pb-Free (SAC alloy) 256 IO BGA comi
Electronics Forum | Thu Nov 03 21:37:06 EST 2005 | fastek
Any decent 7-zone reflow oven rated at 300 degrees C will handle lead free. Prices for used ovens in this range begin around $15K. For waves, the prices are all over the map. Send me a private e-mail and I'll introduce you to a friend of mine who sel
