Electronics Forum: help (Page 1066 of 1174)

Paste Flux quality specification

Electronics Forum | Tue Jul 08 06:00:29 EDT 2003 | iman

As part of our process/quality improvement review, it was raised thru' our findings that its a good mfg practice to monitor the incoming solder paste quality (as part of the indirect materials). We get one-page "outgoing QC" vendor reports with each

Pinhole Solder Joint Reliability

Electronics Forum | Mon Jul 21 08:34:44 EDT 2003 | Don Bell

Blow holes/ pin holes in solder joints are the result of multiple root causes. Suggested analysis might look like this; 1) What method of solder preservation is used on the bare board. (hasl,enig, osp, etc.) HASL can leave unwanted flux residues,

Wave Soldering Upflow

Electronics Forum | Tue Aug 05 18:02:05 EDT 2003 | MikeF

Check the areas that are getting solder on the top side. If you have internal ground planes, and the ground plane pth's are not getting solder on top, and signal pth's are, it's a heat problem. If the ground planes are in the middle of the board yo

Static control for shelving

Electronics Forum | Fri Aug 08 18:00:34 EDT 2003 | kenBliss

Hi Bman At the risk of coming off as a �sales type�, you appear to be looking for a solution provider and probably opinions on your ideas. Regarding your method mentioned, This is not the most efficient way to run a stockroom but will work and will

SMT packages that can solder inverted?

Electronics Forum | Thu Aug 21 21:05:39 EDT 2003 | Tom B

Dan, We, do alot of double reflow. Your right we typically see alot of the standards components, SOT's, SOIC's, Chip stuff. The largest we do with out adding epoxy is some 32pin PLCC's. We have several assemblies were were doing PLCC44's, Sockets

SMT packages that can solder inverted?

Electronics Forum | Thu Aug 28 16:13:06 EDT 2003 | Dan Gosselin

Thanks everyone for your help. I have since found a good article I am downloading of of the SMTA website. Dan Title : EFFECT OF SURFACE TENSION OF SOLDER ON UNDERSIDE DEVICE SUPPORT DURING REFLOW OF A PCBA Author : Mulugeta Abtew Author Company

Black pad defect on gold plated boards

Electronics Forum | Thu Aug 21 22:10:07 EDT 2003 | adlsmt

Well, for some reason the board house will pay for the boards but has some issue with paying for the parts on them. Why am I not supprised? Perhaps I have mis-diagnosed the problem. We have found two different board p/n's with the same type of defec

OMNIFLOW 10

Electronics Forum | Thu Sep 18 11:07:39 EDT 2003 | donbell

SR. Tech: I have worked with Omniflo 7 and 10 ovens for many years. I purchased several 10 zone ovens in '98 when I worked for Ericsson. Here are some of my experinces with Electrovert Omniflo ovens; Yes, you can expect to run the conveyor speed a

New web site

Electronics Forum | Fri Sep 26 12:02:16 EDT 2003 | kenBliss

While your setting up that site to bash the OEM equipment companies please set one up for all the bad used equipment dealers that sell equipment with no warranty and turns out to be a lemon so the customer has to call the OEM to get a contract to get

Mydata Package Database hints?

Electronics Forum | Wed Oct 01 16:53:05 EDT 2003 | johnpatricelli

We use Mydata PNP equipment, and are quite happy with it's speed and accuracy, especially with the latest version of the Mydata Tpsys software which includes a prototype version of their emergent auto-teach function for package sizes that can handle


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