Electronics Forum | Tue Oct 06 15:41:14 EDT 1998 | Mike C
| | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medium b
Electronics Forum | Wed Oct 07 06:19:30 EDT 1998 | Charles Stringer
| | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medi
Electronics Forum | Wed Jun 10 18:50:36 EDT 1998 | Earl Moon
| | | Does anyone have any info./studies on what the percentage or PPM defect rates are for each part of the typical SMT process. | | | Example: | | | Screen Print = 45% of total defects | | | Component Placement = 25% of total de
Electronics Forum | Thu Mar 13 15:22:47 EST 2003 | ruggi
Ditto on the profile/reflow oven...a couple years ago, we had a huge increase in the number of tombstones found post-reflow. Profiling the oven showed a decent curve with some innocuous minor deviations, and further investigation of the oven found 2
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 | Tue Jul 23 14:55:06 EDT 2002 | colnat
I am looking for defect rates on hand soldering. Specifically - I have a large number of wire jumpers that need to be hand soldered across two boards (connectors are not an option). I am looking for a defect rate so I can perform a cost analysis in
Electronics Forum | Fri Jun 18 19:41:24 EDT 1999 | KEVIN SIMPSON
| How are you inspecting pcbs post-reflow, are you inspecting all or sampling. The type of assembly involved would be mainly chip components with a mix of actives and a few 25mil and under pitch. | If you sample what are your fault rates looking lik
Electronics Forum | Wed Nov 18 11:03:45 EST 1998 | Scott Lolmaugh
| | | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to
Electronics Forum | Mon Jul 05 18:40:24 EDT 1999 | JohnW
| Dear All, | | We are a medium sized Electronic manufacturing company manufacturing computer motherboards and Telecommunication products. We have a big debate going on within our company regarding the defect rate measurement technique. | | At p
Electronics Forum | Mon Nov 15 02:45:15 EST 2010 | 89jeong
Hello. We encountered a SMD problem on PCB. It is that the lead of photocoupler is shifted after reflow and don't meet the minimum requirement of side joint length. I know this is a defect but what i want to hear the reason and the solution to prev
