Electronics Forum | Mon Jan 22 20:14:52 EST 2001 | davef
Take note that contrary to popular belief, it is not acceptable to assume that the floor life clock will be temporarily stopped when components are put back in dry storage following exposure to ambient conditions exceeding one hour. ... why doesn�t
Electronics Forum | Thu Aug 23 15:38:58 EDT 2001 | mparker
Bingo - the mylar is the problem. Ask the fab vendor what storage and humidity controls they use on the photo tools. The films can changed geometry from day to day depending on the ambient environment. What controls are used during production? The ra
Electronics Forum | Mon Mar 05 13:08:16 EST 2001 | billschreiber
Hi Roger, Our customers use their Smart Sonic Stencil Cleaners for cleaning SMT and wave pallets. There are two primary protocols used. 1) If you have a large quantity of pallets and they are becoming contaminated rapidly, a dedicated stencil clean
Electronics Forum | Wed Mar 21 16:32:03 EST 2001 | mparker
The root cause is dependant on the type of solder "splash", ball, whatever, that you are seeing post reflow. If it is smears, then cleaning the stencil underside is probably the answer. Are you using automatic wipers? How many print cycles between w
Electronics Forum | Tue May 15 10:02:20 EDT 2001 | John
I should have been more clear;the temperature that I indicated was measured inside the dispenser cabinet. We setup a very simple system to monitor and maintain the temperature inside the cabinet. By comparing our temperature to our production resul
Electronics Forum | Fri Aug 10 09:57:24 EDT 2001 | John
We are an OEM automotive electronics supplier and began using SMT in our products a couple of years ago. We use a glue and wave process, and one of our main issues has been our glue dispensing process. We have a Camelot 3800 machine, and we have be
Electronics Forum | Fri Jun 01 12:23:22 EDT 2001 | medernach
I've had good and bad experiences with OSP's. First of all, ask yourself, "Why use an OSP?" If you don't need it, don't use it. Solderability is dependent upon the number of thermal passes (the fewer, the better), the thickness of the coating, the
Electronics Forum | Wed Apr 11 22:05:58 EDT 2001 | davef
OA pastes are more hydroscopic than NC pastes. Hydroscopic. The capacity of a material to absorb and retain moisture from the ambient air. Sometimes this is compounded if you remove paste from the frig and let it warm to room temperature, because
Electronics Forum | Wed Sep 19 14:23:31 EDT 2001 | jschake
Pad Metallurgy Used: Copper OSP pads were used for all of the results that I have been reporting. The same design test boards with Nickel/Gold pads are available and awaiting further assembly tests. I will consult with a board technology and metall
Electronics Forum | Thu Sep 27 19:52:28 EDT 2001 | davef
All of the discussion of "environmental controls" are a matter of degree, dependent on the requirements of the product that you manufacture. For example: shops assembling under-the-hood products have different requirements than shops making garage d
