Electronics Forum | Tue Dec 14 11:08:19 EST 1999 | John Thorup
I think you're on the right track Paul. You didn't mention what type of solder mask was used but I'll presume that it was LPI (liquid photo imagable). If development of the image is incomplete some mask can remain where it is unwanted. Sometimes im
Electronics Forum | Fri Dec 03 18:01:39 EST 1999 | Dave F
Chris, Two points of perspective are: 1 Solderability: The shelf life of components has elapsed when they are no longer solderable. There's tons of variables that affect this, but keys are: * Intermetalics grow as a function of temperature. * Th
Electronics Forum | Wed Sep 30 15:27:26 EDT 1998 | Matthew Park
Very simple, you just buy a commerical-grade vacuum sealer. It's not that expensive. A small tabletop unit cost $2000 - $4000. I don't have a number handy. E-mail me off-line if you require more info. Regards Matthew NII, Norsat Internationa
Electronics Forum | Thu Oct 01 20:11:31 EDT 1998 | Wayne Bracy
We are trying to eliminate/minimize the baking process for high lead-count ICs. We would like to reseal packages containing these parts to minimize exposure to humidity. Anyone have or know of a way to reseal or vacuum pack parts? Any suggested eq
Electronics Forum | Mon Oct 01 09:42:42 EDT 2001 | ac
Darren , I done the HNC in Electrical & Electronic Engineering which was later changed to Mechatronics . The course itself will give you a good broad based grounding in all aspects of E&E Engineering . What you really need to back it up is good quali
Electronics Forum | Mon Feb 18 09:58:51 EST 2002 | caldon
I am not a fan of "Gold Board" type of inspection. There are many new sophisticated ways of inspection one being neural networking. This is a method where learning occurs by exposure to a truthed set of inputs and outputs data where the algorythim in
Electronics Forum | Wed Jul 17 03:36:00 EDT 2002 | robbied
Answers are: *Mainly copper and potassium. *it looks like a soft growth. *customer will not accept this, hence the returns. These boards are either reworked or scrapped. *Flux is not an issue. *The cleaning process has been found to be the cause of t
Electronics Forum | Wed Aug 21 07:24:12 EDT 2002 | bayanbaru
What is the correct method to bake or cure the component?Standard baking practise by us is to place the units into oven at 125 �C for 8 hrs directly. But I was told that the correct baking practise is to cool down the Baking Oven to Room temp and onl
Electronics Forum | Thu Nov 07 04:24:24 EST 2002 | Yngwie
Thanks for the reply guys...It was much appreciated. On syringe or Cartridge - what about the impact of flux migration, there was a talk about, periodically we need to turn the cartridge or syringe upside down to ensure the metal content & flux are a
Electronics Forum | Sat Dec 21 13:03:52 EST 2002 | V.RAMANAND KINI
Hi to all, All of us are familiar with the conventional way of making PCB...I mean...photo tools/expose/develop/etch/plate etc., These involve lots of chemicals and the work place is toxic. I have a small PCB with just two curves (circuit tracks)and
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