Electronics Forum | Tue Aug 28 09:53:44 EDT 2001 | Brock
Stefan, I could be wrong but I have a question about every 10th board having a defect. If a machine places 1 million components and a the board has 200 components you arrive at 5000 boards. If every 10th board has a defect, then only 500 boards have
Electronics Forum | Thu Jan 23 17:23:24 EST 2003 | slthomas
I have used Balston (www.parker.com/balston) for desiccator cabinets in the past and really liked them. It's the only brand I've used so can't comment on how they compare with anything else, but it was certainly easy to use (hook up 100psi and dial
Electronics Forum | Tue Jun 14 10:38:53 EDT 2005 | Stefan
500 rejected (?) per million placed components is a very good rate, considered that it would be better than 4 Sigma if you name it defects on the board. Or do I incorrectly convert ppm to dpm? * 3 Sigma 66,800 defects per one million opportuniti
Electronics Forum | Sat Jun 20 00:22:12 EDT 1998 | Arul vanan
Presently many of our boards are wave soldered with 0603 chips on the bottom side, with soldering PPM level of 500 PPM. Apart from dispensing the glue we do screen print the glue depending upon the product maturity. My question is, 1. Can we print t
Electronics Forum | Wed Jul 07 13:37:56 EDT 2004 | mark
Not sure if this helps but found this site that outlines % of N2 against O2 ppm levels. You need 99.99% N2 purity for http://www.tkb-4u.com/articles/consumables/whatisnitrogen/whatisnitrogen.php Most customers we have worked with in the past run an
Electronics Forum | Sat May 26 04:57:53 EDT 2001 | Brian Sloth Bentzen
Dear Frang. The right O2 level are mostly determined by the products you produce (E.i. PCB surface and component solderability). In reflow I would say the window is between 100 and 1000 ppm, depending on the issues above. Personal I choose a maximu
Electronics Forum | Thu Jul 03 08:53:27 EDT 2008 | rgduval
I would...and then use the data of the known issues as part of the secondary analysis. The defect is a defect, one way or the other. You can use the secondary analysis of your PPM numbers to continue to drill down in the process. If your overall P
Electronics Forum | Sat Jan 15 16:59:47 EST 2000 | Steve Thomas
Thanks, Mark. Actually we already have an established mark. We use 500ppm (99.95%) as our acceptable level. Problem is, someone (another manufacturer) told someone else (our pres.) that THEY build to 50ppm. Soooooo, someone else told my boss that
Electronics Forum | Thu Jun 10 13:29:21 EDT 2021 | edgar_smt_ap
Good morning. What should be the Oxygen content Standard in an Oven? Here in my company, we have an ERSA reflow Oven, and we work with Lead Free solder paste. According to Work Standard documents send by my company corporate, the PPM Oxygen conte
Electronics Forum | Tue May 02 17:11:17 EDT 2000 | John
My company just purchased a Vecta (E-vert) wave soldering machine. Bridging has become a serious issue, both on SMT components and thru hole. We are currently seeing about 500 ppm. The products that are being run now were run previously on our old
