Electronics Forum: structured (Page 1 of 29)

Reflow profile negative temp ramp rates

Electronics Forum | Tue Apr 09 08:49:43 EDT 2002 | davef

Hey Bud. Allow me to 'turn' your point about 'grain structure' just a bit. Fast cooling rates / coarse grain structures was a bit of red herring in the early 80's. Faster cooling DOES produce finer grained solder connections. Accelerated testing of

mini BGA

Electronics Forum | Fri Jun 19 01:41:46 EDT 1998 | kuo-ching,HUANG


baking boards, revisited

Electronics Forum | Wed Oct 02 13:59:11 EDT 2002 | davef

There are some excellent exhumation structures of high pressure and superhigh pressure metamorphic terranes in the Qinling-Dabie Mountain belt.

PCB Laser Marking

Electronics Forum | Fri Feb 01 09:49:25 EST 2019 | scotceltic

Do you know what their support structure is in China ? Specifically Shanghai area ?

Re-Reflowing PCB's

Electronics Forum | Tue Oct 14 23:30:38 EDT 2003 | Dean

Get high magnifiction micro structure analysis of the failed joints. I bet you will see the correct grain structure. What about the other part types? Any failures? I assume this is standard 63/37 Eutectic solder? These aren't heart monitors or

What's The Resolution?

Electronics Forum | Mon Jun 18 19:49:45 EDT 2001 | Gil Zweig

To best visualize the factors effecting resolution, carry in your minds eye an image of a light shadow being cast on the wall using a flashlight. The size of the flashlight filament would be the analagous x-ray "focal spot" The smoothness and/or roug

BGA Picture Evaluation

Electronics Forum | Fri Apr 11 13:59:06 EDT 2003 | MA/NY DDave

Hi Wow, Quite elaborate. My Mechancial Engineering, Thermo friends would be proud of you. I am not kidding. The only problem I have with your technique is that quite often internal lands and structures steal the heat during soldering. By your techn


Electronics Forum | Fri Oct 29 17:07:40 EDT 2004 | davef

What do you mean when you say: * "...an SMT company..."? What is your product? Are you a contractor? Are you a consultant? * "...like to be able to discuss issues with someone..."? What kind of issues? [We discuss issues every day HERE.] Are yo

European logistics constraints

Electronics Forum | Tue Jul 25 11:04:03 EDT 2000 | rene

Lately I have noticed that many manufacturers of electronic (components) have problems in setting up their logistics structure in Europe (availability of parts, spares, reverse logistics, RMA shipments, leadtime constraints). Is there anyone who shar

Attaching a Cost to Solder Defects

Electronics Forum | Wed Mar 14 17:26:03 EST 2001 | davef

Most $$-value stuff is dependant on the cost structure of the company. Why not do a small cost study to measure the amount of time your improvements save? Folk in accounting should be able to "rough price" the $$ benefit of your efforts.

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