Electronics Forum | Wed Jan 20 14:21:54 EST 1999 | Dave F
| I need some opinions (And I know everybody has one). | I am mounting a board into a case, after mounting the board | I am loading it with stress in the middle causing it to bend around .030 inch. The board is 4" X 6" and is Bending in the 4" dire
Electronics Forum | Fri Apr 16 17:19:59 EDT 1999 | Dave F
| | Hi, | | I just cheesed my previous attempt at this. I looked through IPC 600 and couldn't find anything relating to dimensional stability of a board with regard to stretch. I found bow and twist but nothing on size. I have a PCB that is .030"
Electronics Forum | Wed Jul 24 09:50:20 EDT 2019 | amitthepcbguy
To perform conformal coating of PCBs in high power electronics applications follow IPC-A-600F and IPC-CC-830B conformal coating standards. This standard enlists several performance criteria. Additionally, this standard is considered as a good referen
Electronics Forum | Mon Jun 08 13:26:59 EDT 1998 | D.Hammond
I work QA at an OEM in Alberta, Canada. I saw earlier posts on the smtnet regarding PCB haloing criteria. I am currently in a dispute with my PCB vendor over the acceptability of haloing (delamination) around plated through holes and vias on a lot of
Electronics Forum | Mon Jan 16 17:07:19 EST 2023 | demradarmfg
OP here Everything you have said makes sense. However, sanity check me on this. The one thing that IPC-A-600 does not discussion is inspection sampling or frequency, which is discussed in section 4 of IPC-6012. Table 4-3 lists all these different
Electronics Forum | Fri Apr 20 05:32:39 EDT 2001 | dougie
Hi, I've just splashed out �60 on IPC-A-600F trying to find out the formula for measuring the bow and twist of raw PCB's. Much to my dismay there are 10 lines on the subject in the whole standard. Worse still is that it tells me nothing I don't alre
Electronics Forum | Thu Aug 21 12:06:17 EDT 2008 | pms
Thanks for your replies. The problems do not appear on the complete lot of PCB's. I don't know the percentage at this point. I agree. It also appears to me that these PCB's are over-etched. The PCB rep say's "Yea, there's a few boards that have
Electronics Forum | Sun Nov 14 14:14:47 EST 2010 | methos1979
On the bare boards, no paste, just a bare FAB board. We get them from a PWB manufacturer and inspect them to IPC-A-600 and then ship them to another manufacturer to populate them and we then inspect them to IPC-A-610. I have written several program
Electronics Forum | Tue Jul 27 11:59:19 EDT 1999 | Wolfgang Busko
While inspecting incoming PCBs we detected around all plated-through-holes (only there and all in the same place) some halfmoonshaped light rings that match obviously only with the pink ring symptom shown in the IPC-A-600 chapter 2.5.2.. That would m
Electronics Forum | Tue Mar 23 14:08:57 EDT 2010 | davef
You have what looks to be blisters/delamination. Use IPC-A-600F as a guideline for acceptance. Usually, we start from the opinion that blisters/delamination as a fabrication issue, even if it appears during solder processing. Often blisters/delam
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