Electronics Forum | Sat Apr 25 08:48:45 EDT 1998 | raymond
Is there an industry standard in calculating SMT process PPM level for benchmarking purpose ? What are the industry benchmark ppm number for some of the defects like solder short for 20-mil QFP, tomstone problem for 0603 components etc....
Electronics Forum | Sat Apr 25 12:58:13 EDT 1998 | Earl Moon
| Is there an industry standard in calculating SMT process | PPM level for benchmarking purpose ? What are the industry | benchmark ppm number for some of the defects like solder | short for 20-mil QFP, tomstone problem for 0603 components etc....
Electronics Forum | Tue Feb 19 13:37:48 EST 2002 | PeteC
When evaluating AOI you must first define what type of inspections you want the system to perform, pre-solder or post-solder. What separates many mfgs. of these systems is how effective they are at finding post solder defects. This is where camera re
Electronics Forum | Wed Sep 15 06:53:48 EDT 2004 | John
Hi Everybody, Can enybody tell me what is acceptable level of defects for Wave soldering?I know that it's depends of many factors,but I want to benchmark my process. Thank you
Electronics Forum | Mon Aug 19 13:00:31 EDT 2019 | ameenullakhan
Thanks Steve for mentioning the purity level .., Our purchase and sourcing team was asking us what is our expectation on purity level. Based on which they are checking with supplier. So wanted to know any standard which is followed for the same. R
Electronics Forum | Wed Aug 14 07:00:42 EDT 2019 | ameenullakhan
What should be the ideal Purity level of Nitrogen at incoming stage ?? Please suggest. Regards, Ameen
Electronics Forum | Thu Aug 15 03:23:05 EDT 2019 | sssamw
It depends your product application and requirement. If high level, 100ppm required, or even 2000ppm is also ok. There should have sensor detecting O2 ppm inside reflow.
Electronics Forum | Thu Aug 15 21:16:46 EDT 2019 | ameenullakhan
Hi Thanks, I am concern about Raw nitrogen purity level. When we receive it in our compony from a supplier. Regards, Ameen
Electronics Forum | Fri Aug 16 08:49:04 EDT 2019 | charliedci
If you are purchasing bottled nitrogen, your supplier should know the purity level.
Electronics Forum | Fri Aug 16 12:39:51 EDT 2019 | spitkis2
Liquid nitrogen that we get in 230 liter tanks is 99.9995% pure N2.
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