Electronics Forum | Tue Nov 21 19:23:15 EST 2006 | greg york
Had exactly the same problem the other week. Baked some boards did improve slightly but not convincingly. Washed bare PCb and found excessive HASL fluids left on board from improper rinsing and problem disapeared. Baking HASL fluid out is impossible
Electronics Forum | Thu Nov 08 07:33:23 EST 2007 | hussman
Why? Just use IPC on finished solder joints as your guide. I've seen groups of people puts hundreds of hours into this task and then tell me a 3 mil stencil is all I need. After reflow, none of the solder joints meet IPC Class 1 and a lot of tombs
Electronics Forum | Fri Feb 29 08:12:56 EST 2008 | davef
Solder paste suppliers often make recommendations on solder paste handling after removing it from the container [eg, jar, cartridge, etc]. For instance, Multicore Solder Paste Handling Guidelines, September 2004 says: As a general rule, paste that h
Electronics Forum | Fri Mar 26 15:36:50 EDT 2010 | krish_bala
Hello Graham, We are currently using Tacky Gel Flux during our replacement process. We dip the BGA component on the flux prior to placement. Once it is dipped, the alignment and placement is done. As for the profile, I believe I am hitting the corr
Electronics Forum | Wed Jun 08 10:57:20 EDT 2011 | pcbrookie
We recently got our last BGA X-Ray results back (no X-ray in house yet) and had more than one board/BGA look like the attached image. The balls on one corner are completely collapsed (so much so that bridges appear) and raised on the opposite corner
Electronics Forum | Fri Mar 11 09:42:07 EST 2016 | oxygensmd
I am trying to decide how to best dispose of our > old running Siemens equipment. I would like to > get something for them but I am not sure who > needs these older machines I have about 8 > available; any ideas guys? > I am trying to decide ho
Electronics Forum | Wed Sep 20 09:24:09 EDT 2017 | bstogsdill
Hi- I am attempting to determine if the "User Performance Inspections" on table 4-1 are required or are they just optional? Section 4 para 4.2 only refers to Qualification Inspection and Quality Conformance Inspections that are performed by the past
Electronics Forum | Sun Feb 03 07:39:27 EST 2019 | dfl
POCKET POSITION PROGRAMMING This procedure ensures the components are properly centered at the tape feeder pickup point (over spring stabilizer). NOTE: The feeder can be reset at any time by removing it from the feeder base and reinserting it. This
Electronics Forum | Wed Dec 04 07:35:08 EST 2019 | proceng1
We also have a few customers that seem to buy the cheapest LEDs available and provide them for the build. We've had complete reels that had obviously been exposed and oxidized. You can try a solder with a more aggressive flux. How long is your pro
Electronics Forum | Fri Aug 07 14:52:43 EDT 2020 | glasscake
Does anyone have a comprehensive manual or some pages on how to setup/how the laser height functions work on a Mirtec MV-7U? (Mirtec Inspector 4.5.6) Even a sentence describing what each input for these tools do would be amazing. I FINALLY was able
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