Electronics Forum | Mon Jun 27 01:34:30 EDT 2011 | samsim
I fully agreed do not CLEAN the NON CLEAN process. However, some customer may request to clean the non clean process; and they willing to pay for it. In order to clean the non clean processes (the residual on the board), you need to consider the comp
Electronics Forum | Fri Jul 30 10:30:23 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 w
Electronics Forum | Fri Jul 30 16:06:22 EDT 1999 | Earl Moon
| | | | 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
Electronics Forum | Tue Jun 09 09:17:21 EDT 1998 | Earl Moon
| Hello, | Some time ago before I was an engineer the company that I work for now made it a company policy to not allow hot air leveling for reasons that I do not know about yet. All I know that this policyt agreed with the MIL standards at the time
Electronics Forum | Tue Jun 09 12:39:47 EDT 1998 | Dave F
| | Hello, | | Some time ago before I was an engineer the company that I work for now made it a company policy to not allow hot air leveling for reasons that I do not know about yet. All I know that this policyt agreed with the MIL standards at the
Electronics Forum | Tue Jun 09 13:08:30 EDT 1998 | Earl Moon
| | | Hello, | | | Some time ago before I was an engineer the company that I work for now made it a company policy to not allow hot air leveling for reasons that I do not know about yet. All I know that this policyt agreed with the MIL standards at
Electronics Forum | Thu Sep 17 10:52:40 EDT 1998 | Chrys
| I need an evaluation process to prove to a customer that our no-clean process does not leave excessive residue? Any ideas? Justin's right - you need to find out why there is hesitation about residue. Right now I make a board that has contacts for
Electronics Forum | Tue Jun 13 13:40:20 EDT 2006 | Bob R.
Wow, good luck. None of my test results would be helpful since we use IPC-B-24 test boards as received from our board suppliers so we have a clear understanding of what we're shipping customers, not necessarily paste performance alone. We'll only cl
Electronics Forum | Wed Oct 27 16:55:38 EDT 1999 | Joe Herz
Jerry, In our house we generally run a glue bottom last but people do it both ways. Our logic revolves around protecting components from being knocked off the board during handling and processing prior to wave solder (this is most important with sm
Electronics Forum | Wed Mar 18 13:21:26 EST 1998 | Earl Moon
| Cpk's on top flight ovens (e.g., Conceptronics, Heller, Electrovert, Vitronics) vary wildly, from 1 to 2+, between different supplers. The suppliers don't seem to understand Cpk's. A supplier's rep whose oven has a Cpk of 1.0 told me: | 1. Cpk's
