Electronics Forum | Tue Feb 28 14:32:26 EST 2006 | masrimhd
As I know, the encapsulation effect occurs only with rosin based fluxes. So if you have a PBA soldered using RA Flux, you should either wash it well, or leave it alone and it will be safe. For NC process the story is different because there�s no re
Electronics Forum | Mon Apr 23 09:37:20 EDT 2007 | davepick
Assuming you are going to build using a Leaded part on a Lead Free Process - beware of Weak Joints. I saw this at a large Multinational company - They had secondary reflow on a Top Side QFP when the PCB went over the wave. We did pull strength tests
Electronics Forum | Thu Feb 15 19:41:38 EST 2001 | davef
What do you mean by "But after performing temperature cycle test, the former aging rate (from the shear strength ) seems faster than the latter."? Comments are: I can't recall having heard the term "precipitation hardness" [not that that means anyt
Electronics Forum | Wed Jul 03 15:40:17 EDT 2013 | davef
Shear tests are [in my opinion] senseless. The shear stress you measure depends more on the shear rate and on the point where the force is applied than on the grain structure. When shearing a component, you not only apply shear stress, but also roll
Electronics Forum | Tue Jun 19 18:16:52 EDT 2001 | davef
In the newspaper, I read about "BIG Daddy" ice cream by DeConna Ice Cream Co. of Orange Lake, FL. According to the packaging label, a 12 oz serving "BIG Daddy" has 100 calories and 2 grams of fat. At only 2 Weight Watchers points, the stuff is virt
Electronics Forum | Fri Dec 21 13:51:16 EST 2007 | howard stevens
Gentlemen, This is an interesting topic. If one refers to the Nihon Superior patent, they make the following claims. "Germanium makes the crystal finer when the alloy solidifies. Germanium appears on a grain boundary, preventing the crystal from b
Electronics Forum | Wed Apr 28 08:04:26 EDT 1999 | Dave F
| | Thank for the input. But I guess I was looking for more. We have been transferring boards for some time and a have good working relationship with our primary CEM and have worked out many bugs. I was thinking more on the order and don't shoot m
Electronics Forum | Wed Aug 07 11:55:31 EDT 2002 | slthomas
Ron, have a look at http://www.fda.gov/cdrh/dsma/cgmphome.html It would be a nightmare, if your plant is not structured to support it. It's a huge pain in the fanny even when you (alledgedly) are. I'm not sure what you're pursuing, but if you're c
Electronics Forum | Tue Apr 20 08:19:07 EDT 2004 | revathichan
We the biggest technical institution in Asia now proposed a SMT theory and SMT Laboratory in our college to the final year Electronics and Communication Engineering students. The Industrial Giants in SMT in Assembly, Process, Testing, Repairing, Sold
Electronics Forum | Tue Jun 06 14:26:00 EDT 2023 | spoiltforchoice
> In Hungary there are many EKRAs. Bosch, Zollner > and many big/small company are using them. I also > saw the latest DEK but I think DEK is > over-complicated, fast and good printer - but if > you have any problem, it cost a lot.
