Electronics Forum | Wed Jul 12 05:04:01 EDT 2000 | JohnW
Hi Guy's.... Was thinkng about i more this moning..in the shower actually...sometimes think I do my best work there!. So far I'm looking at stuff like integrating the DFM study to show thing's that are going to present production / process issues e
Electronics Forum | Fri Mar 07 04:25:29 EST 2008 | mun4o
Hi, i try to collect data for solder wave process defects, but I dont know how I must calculate these data.Can anyone help me - may be there nave some free software for this.I want to calculate how many ppm is our deffects.And, how is acceptable ran
Electronics Forum | Fri Jun 14 14:22:43 EDT 2002 | davef
Ken: At the end of arguing about how �myfloh� is calculating defect levels, reality sets in. �Between 50 and 250 ppm� is pretty darn good. Clearly, they have picked all the low hanging fruit.
Electronics Forum | Sun Oct 28 22:10:09 EST 2001 | ianchan
Hi Mr Parker, I sent u an email cuppa days back, accepting your kind offer to help "wandering-souls" like us, by your sharing Excel spreadsheet formats, depicting DPMO/PPM graphical calculations, with us. I was patiently awaiting your reply to my e
Electronics Forum | Thu Nov 30 13:51:33 EST 2000 | Michael Parker
Thanks for the details. Next question- where is your first time pass rate measured? Is this at test? Do you have inspection gates at the end of each process step? To get to the root cause, you need the earliest detection. Collect attribute data by a
Electronics Forum | Wed Aug 21 12:57:41 EDT 2002 | dragonslayr
I would like to address several issues. First, your reflow is 150 PPM for the same exact assemblies that have lower PPM's? or are you giving a 150 PPM rating for all products produced through the reflow process in a specific time period? Reflow is a
Electronics Forum | Mon Jan 17 12:16:02 EST 2000 | Brian W.
My old company (CM) ran SMT to 50ppm including some very complex boards. We established the normalizer number by: #components + #solder joints. As was stated earlier, the ppm for any given product is the result of many factors. You may get differen
Electronics Forum | Mon Jun 01 00:46:14 EDT 1998 | S. S. Bist
We have few questions for BGA assembly. Specially with Fuji machines. 1. What are the testing mechanism other then X-rays. 2. How we get data from Fuji to check repeatability and reproducibility in terms of percentage and how it as calculated. 3. Do
Electronics Forum | Thu Jan 04 17:04:43 EST 2007 | slthomas
99% good solder joints = 10000 ppm (defects per million opportunities). Having only built with 0603s I can't speak for a target but that still seems pretty harsh....with a 75/25 0805/0603 ratio at my last place of employment I think we were running
Electronics Forum | Thu Jun 18 07:34:46 EDT 2009 | rameshr
Dear Mr. Davef & MR. Michael Parker, We have deveoped a Base document for calculating DPMO & OMI to convert our product yield to PPM Monitoring level , Kindly provid eme your email id, so that i will post the message to you & if need any modificatio
