Electronics Forum | Thu Jun 04 17:32:20 EDT 2009 | bigdaddysoy9
If you are talking about assemblies, Class 1 is like cheap toys or something you wouldn't expect to last very long. Class 2 would be components for a television, air conditioner, automobile (except safety critical). Basically, things that you would b
Electronics Forum | Wed Sep 26 11:58:13 EDT 2001 | Fox
Don't hold me to it but... Class 1-process indicator, varify value (cap, resistor) Class2,3-failure (rework required) This is what we used at my former job when i took over QA responsibility.
Electronics Forum | Thu Apr 17 16:41:37 EDT 2003 | davef
60% ||||36% of ball area|| >36% ||Class2|| Accept|| Reject ||||45% of ball diameter|| >45% ||||20.25% of ball area|| >20.25% ||Class3|| Accept|| Reject ||||30% of ball diameter|| >30% ||||09% of ball area|| >09%
Electronics Forum | Mon Nov 01 17:13:37 EST 1999 | Mark W.
Jason, What is the revision of IPC you are referring too?? IPC 610 rev. b requires 75% fill on classes 2 & 3. Class 2 does allow the exception of 50% fill if the PCB has a Metal Core or Thermal/Heatsink Plane provided that the solder extends 360 de
Electronics Forum | Mon Aug 11 17:48:39 EDT 2003 | Brian W.
Assuming you are working to IPC standards, are you working to Class2 or Class 3? Class 2 has an exception to the 75% barrel fill (para 6.3.1, page 6-7). "As an exception to fill requirements of Table 6-2 on PTHs with thermal planes or conductor
Electronics Forum | Wed Feb 12 16:48:31 EST 2014 | gmcquoid
We are having an internal debate here related to minimum Conductor Width. Can you have your QA manager review this and advise. IPC-6012C-2010 3.5.1 Conductor Width and Thickness When not specified on the master drawing the minimum conductor width s
Electronics Forum | Wed Aug 12 04:52:54 EDT 2009 | sachu_70
A client document mentions the following: "PCBA to comply with IPC class-2 guidelines, and performance grade 2 for components." What does "performance grade 2 for components" mean? Would appreciate your help.
Electronics Forum | Fri Jul 14 16:32:55 EDT 2023 | calebcsmt
Does class 2 vs class 3 PCBs effect variance/tolerance in terms of actual positioning of pads/traces? For example, if fiducial is to be at 10mm. What's the tolerance for class 2 vs class 3? [variance allowed] Does panelization have any effect on t
Electronics Forum | Wed Feb 17 13:02:03 EST 2016 | comatose
The layer count itself isn't going to be what drives yields. What is the trace/space? How much annular ring for vias did you give them to play with? Class 2 or class 3? What's the worst hole aspect ratio? Controlled impedance? The closer you run to y
Electronics Forum | Fri May 27 14:00:57 EDT 2022 | SMTA-64387182
I am looking for some sample assembly notes for a 2-sided PCBA IPC Class 2. Notes to put on my assembly drawing. Not the PCB fab drawing. Thanks, Joe
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