Electronics Forum: pcba processing timeline (Page 1 of 22)

pcba cleaning

Electronics Forum | Tue Oct 29 21:27:21 EDT 2019 | aqueous

It depends on the flux type. If it's water soluble, it should be cleaned soon after reflow because OA flux remains active after reflow. If it's rosin or no-clean (low-residue), then the only concern is the longer wait time, the more difficult it will

What problems will be encountered in subsequent PCB processing

Electronics Forum | Thu Jul 26 09:14:17 EDT 2018 | teresat2

When the PCB is finished, it must be mainly tested. Mark the broken plate of the short-circuit broken wire, or SMT may fix you later. In the case of Mosaic, the same location of the bad packaging together. Next is SMT welding commonly, want to look f

SMT Classes

Electronics Forum | Tue Aug 21 08:55:13 EDT 2001 | cjrjmj

I have a need to send some Engineers to intro SMT classes. I have found two avenues: 1)ACI (which is to high level!) 2)Cookson CPS which is more in line with intro to SMT process. Are there other that are on re-occurring timelines?

Engineering Change Notification - Required Timeline?

Electronics Forum | Wed Apr 03 11:55:09 EST 2002 | Fuji Spares

If you require a prgram to control the documentation of the ECN process - I would reccomend this company they helped out our process no end by writing a customised Microsoft Access based database visit this site:- http://www.tekno-media.com also i

Looking for a method to clean up the used PCBA.

Electronics Forum | Wed Sep 27 01:29:36 EDT 2006 | billyee

Any machine or process to clean up 400 used PCBA a day?

Engineering Change Notification - Required Timeline?

Electronics Forum | Wed Apr 03 05:47:31 EST 2002 | ianchan

Hi Guys, We have a customer who is requesting us to issue a document ECN (engineering change notification) record to them, IF we have any changes in : 1) direct materials used, 2) indirect materials used, 3) machine configuration, 4) change in SMT L

PCBA fail functional test due to frequency drift

Electronics Forum | Wed Oct 14 03:21:37 EDT 2009 | lincy

We found a PCBA performance have insertion loss at the functional test process. We did some analysis and conclude the main root cause is from the PCB performance. What is the critical parameter in PCB will cause a failure in PCBA frequency performan

Batch cleaner

Electronics Forum | Tue Sep 07 22:38:25 EDT 2010 | aqueous

As with so many things, some brands work very well on high density, low profile assemblies and some do not. Because my company manufactures these machines, I don't want to use this forum as an advertisement so I will recommend the following: 1. Sen

PCB Warpage

Electronics Forum | Fri Apr 08 05:10:10 EDT 2005 | siverts

What is Your customers requirements? Is the PCBA mounted with front/back connectors? Will the PCBA be mounded in a rack and connected to opposite connectors on the other side? In this case, if the warpage is more than approx 1-1.5 % You will then n

Drying PCB after contamination measurement for rework ?

Electronics Forum | Wed Mar 02 13:15:16 EST 2022 | chris007

I am currently working on a manufacturing flow where some PCBA are processed with reflow oven (after being baked before processing), then cleaned with bath, then passed into contaminometer, passed into AOI. The point is after all of this, if AOI dete

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