Electronics Forum | Tue Feb 11 09:01:54 EST 2014 | emeto
You should get your paste in ice(dry ice). Then you should keep it in a fridge. Many pastes now have 1month shelf life(after you take it out of the fridge). If you follow all the above, you might be having: 1. Lot problem - try different lots of you
Electronics Forum | Fri Aug 22 09:41:49 EDT 2003 | davef
Mantis: Kenny reflows paste on [wave solders] all via, not just the test via, to plug the via and provide for a pressure seal between the board and the test fixture. Beyond that, since solder is softer than copper [and fills the hole better], solde
Electronics Forum | Mon Dec 30 23:37:47 EST 2019 | agoesfirmanto
Hello All, I am a SMT Engineer from Indonesia, I am facing the problem of soldering balls in only one IC location, in other areas there are none. solder ball defect almost 30%. I have done several actions but failed to reduce the solder ball. 1.
Electronics Forum | Sat Nov 08 10:04:26 EST 2003 | severs
Once you have selected your plating based on electrical and physical requirments, you should know that there is an inexpensive plastic storage packaging developed by Lucent which can keep any platings solderability from degrading for up to 10 years o
Electronics Forum | Mon Jul 26 21:25:19 EDT 2004 | KEN
I have seen as little gain as 2 months and even up to 6 months additional time to end-of life. Treat solder paste as a perishible item. Note DOM and Refridgeration life and expiration periods. You guys crack me up....now when ever I go to 7-11 I'l
Electronics Forum | Mon Nov 20 16:56:19 EST 2006 | russ
Ahh the old Kester dry product EM907 just had major thicjener issues, we wer quailifying the kester product and could not get out of tube. needless to say it failed the qual. I was informed by Kester rep that all lots were recalled for this? was y
Electronics Forum | Wed Jun 05 15:22:48 EDT 2013 | davef
Solders, Fluxes and Pastes - A Lab Report This webcast consists of 10 individual program segments focused on the important topic of electronics solders, solder pastes and fluxes. Program Segments Include: * Can You Mix Leaded and Lead-free? * Probl
Electronics Forum | Thu Nov 30 00:41:23 EST 2017 | abhilash4788
Dear All, I have OSP finsh pcb on my production, the pcb thickness is 1.5mm and the product is one sideded pcba. After reflow process, Is there any specific time frame defined for smt completed OSP finish pcba before going for wave soldering proce
Electronics Forum | Wed Dec 06 09:09:54 EST 2017 | davef
Suppliers have improved the utility and quality of OSP [organic solderability preservative] solderable surface protection over the years. Be cautious reading too much into older SMTnet [and web in general] conversations about handling OSP. When prop
Electronics Forum | Mon Mar 31 11:10:43 EST 2003 | davef
First, most �thermal shock� recipes are not a reliability test. There is no relationship between the failures seem in these tests and in-use application. These tests show you the failures in these tests. That�s it!!! Second, accelerated life test
