Electronics Forum: correlation (Page 1 of 13)

Voids - correlation with a not wetting PCB

Electronics Forum | Sun Oct 11 13:53:26 EDT 1998 | Vincenzo Longobardo

I have datas to substain that a not wetting PCB ( the HAL oxided or not uniform in thickness )if soldered in reflow, it shows voids with X-Ray inspection.The voids are in side all the joints not only on the solder pads levell. Is there a technical d

Re: Voids - correlation with a not wetting PCB

Electronics Forum | Tue Oct 13 18:32:35 EDT 1998 | Vincenzo Longobardo

Dear Mr. Earl Moon please give me all your information and pictures to know the reason of the voids formation caused by the HASL oxidation. I am very interested to this experience. With Best Regards V.Longobardo |

Re: Voids - correlation with a not wetting PCB

Electronics Forum | Mon Oct 12 08:07:45 EDT 1998 | Earl Moon

| I have datas to substain that a not wetting PCB ( the HAL oxided or not uniform in thickness )if soldered in reflow, it shows voids with X-Ray inspection.The voids are in side all the joints not only on the solder pads levell. | | Is there a techn

Re: Voids - correlation with a not wetting PCB

Electronics Forum | Wed Oct 14 08:32:45 EDT 1998 | Earl Moon

| Dear Mr. Earl Moon | please give me all your information and pictures to know the reason of the voids formation caused by the HASL oxidation. | I am very interested to this experience. | | With Best Regards | V.Longobardo | | | | I will assemble

Info/Papers correlating lead protrusion and reliability

Electronics Forum | Tue Mar 15 16:51:59 EST 2005 | Praveen

Hello: I am looking for papers/information on correlation between lead protrusion and reliability studies conducted on Through-Hole Technologies. I would really appreciate it if information on the same could be made available. Thanks and have a nic

Who Performs SPC in your Facility?

Electronics Forum | Tue Jun 24 21:09:58 EDT 2008 | mleber

Machine operator. Correlation through quality and IPC JSTD trainers.

ROSE Test Instruments

Electronics Forum | Mon Dec 13 16:13:39 EST 2004 | saragorcos

I don't know exactly what you are hoping to learn from the ROSE tester, but if you want some information on how ROSE testing correlates (or doesn't corrlate) to actual board cleanliness and long term performance, take a look at a correlation study we

%RH in the Production Hall

Electronics Forum | Mon Jul 17 11:19:46 EDT 2006 | Chunks

Never seen a direct study on these two correlation�s before. But if you have moisture sensitive devices, higher humidity could have some affect on them. If you are talking regular Rs and Cs over wave solder - I kinda doubt it. Water based fluxes d

Correlation between Component Density & Machine Performance?

Electronics Forum | Thu Sep 30 16:10:50 EDT 2010 | jeremie

Inherrently there is this perception that the higher the density of components on an SMT assembly the better the machine performance. Would you stand behind this theory? I thought that I would, but I can't seem to prove it mathematically. By that

Wetting Issues - Humidity Related

Electronics Forum | Tue May 10 15:44:24 EDT 2011 | davef

From your graph, we just don't see the the relationship between failures and relative humidity. Questions are: * What is the correlation between failures and RH? [We'd bet that the correlation between failures/RH and failures/temperature are 'similar

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