Electronics Forum | Thu Mar 15 06:26:26 EST 2001 | Sal
Sorry for the lack of information provided, I'll try again : Test Points are the one's that are not soldering. The test points are round in geometry, 0.5MM(metric) in diameter with a HASL finish.The test point are no different to the ed through hole
Electronics Forum | Mon May 05 11:35:00 EDT 2003 | Grant
Hi, This is an interesting point. I use Koki paste from Japan, and it's wonderful, however what properties of solder paste would make it "anti tombstone" paste? How does led free effect tomb-stoning? That would be interesting to know. We might go
Electronics Forum | Wed Dec 05 11:04:06 EST 2012 | emeto
AIM can give a good result, I tried the solder > paste from many manufacturer - AIM, Kester, > Indium, Koki, Alpha Metals, Heraeus - but I > stopped my choice at Kester. For example, right > now I have EM907 with date of manufacture in > februar
Electronics Forum | Mon Mar 24 20:30:01 EDT 2014 | davef
The "correct" answer is: Use the tests and methods that you used to qualify your solder paste in the first place. That sounds good but might not be all that practical for practicing assembly-types. Here's something that's not as good, but will give
Electronics Forum | Wed Aug 26 05:24:42 EDT 2009 | ghepo
Ok Eric, finally we know that the problem should be the PILLOW (sincerely, your photo is not very clear) and not the crack of the joint. There is a big difference on the failure mode of the two defects... If the problem is realy a pillow I only ca
Electronics Forum | Tue Nov 05 09:57:45 EST 2013 | cuperpeter
Hello All, We have a problem with dewetting of solder paste. Problem is most visible on the pads without components (see attached pictures) and occurs randomly, 20% of PCB's. Pcb supplier sent us a cross-section of pads with thickness of Cu, Ni and
Electronics Forum | Mon Jan 22 09:28:57 EST 2001 | Adam
The assembly is HASL finished. The colour of the solder mask is green, ( sorry I dont know the technical name ).The flux is No Clean (Koki JS3000)which is seeing a preheat temp between 90-100degCel. The solder pot is set at 250degCel and is 63/37.
Electronics Forum | Sun Jan 24 14:01:56 EST 1999 | Daniel
| I'm currently planning to do an evaluation of RMA flux solder pastes for mil type applications. Does anyone have any suggestions for vendors to try? I'm especailly interested in pastes that aid application on boards with 20 mil pitch. | "KOKI 95
Electronics Forum | Wed Jul 07 02:20:48 EDT 2004 | Koki
Please let me know exactly the Koki specification that has managed to solve the balling issue and we can look at the level of residue or the cosmetic may be what you wish to improve.
Electronics Forum | Wed Jun 14 12:25:50 EDT 2006 | Rob
Hi Shawn, See if you can get hold of a free tub of Koki S3X58-M406, it claims to be good with Alloy 42. http://www.ko-ki.co.jp/product/new_product.html#new03 Cheers, Rob.
