Electronics Forum | Tue Dec 14 20:57:07 EST 1999 | Curtis T.
John, I have never seen black pad covering a majority of the board, that would be a scarry thought. I think he is talking about building modules (sims dims) and getting soldering spatering on the gold edge connectors. We went the rounds with that s
Electronics Forum | Tue Dec 14 10:36:42 EST 1999 | Paul Peterson
I recently encountered reflow soldering defects on a pair diode package, the smd pad had a green contamination, I'm convinced that this is not oxidation. The no-solder condition appears to be caused by a sloppy soldermask process, although over the y
Electronics Forum | Sat Dec 04 09:33:18 EST 1999 | Christopher Lampron
Hello Russ, I believe that the dullness in color of the solder joint is related to the gold finish on the pads. I have had done alot of thru hole soldering of gold pins as well as SMT on gold finish and have seen the condition that you are talking a
Electronics Forum | Fri Dec 03 14:33:18 EST 1999 | John Thorup
Hi Cunli I guess it's too much to hope for that you're back but it's nice that you're still paying attention . I've used the printer friendly version before and it worked fine. However it does't always work. I'm holding Dave F's posting (help with
Electronics Forum | Tue Nov 30 15:38:27 EST 1999 | Wendy Casker
Hi, I am looking for land patterns for 0612 and 0508 chip capacitors. Because they are not standard (yet) package sizes, i am having trouble finding a standard land pattern. (If you don't know what these are, picture a 1206 or an 0805 with the te
Electronics Forum | Mon Nov 29 16:17:43 EST 1999 | Curtis T.
Are these blades coated with something like PTFE (teflon)? If so does the coating flake off over time. Incidently I just got a pice quote and they are 4.5X that of our standard MPM nickel plated spring steel, so I wanted to make sure they would last
Electronics Forum | Sat Nov 13 08:16:16 EST 1999 | Chris Jackson
I am interested in discussing AOI. I am looking at introducing a system to a new SMT line. I am very interested in hearing from someone with MVP, MVT, Kestra, and CRTechnologies. The combo of x-ray and 2D inspecion that CRTechnologies offers is very
Electronics Forum | Thu Nov 11 18:28:10 EST 1999 | John Thorup
Hi Jeff Actually it's not necessarily Signal to Noise Ratio or even RF circuitry. All no cleans leave behind residue by description. This residue can affect RF or other high frequency circuits in a number of different ways including SNR. Very high
Electronics Forum | Wed Feb 13 17:29:16 EST 2002 | Sheri Connor
Hello Michael, I am new to this SMT Net Forum (sorry to reply so late!)and happened to plug in a search for "scanning". I wanted to make sure you have your questions answered. ScanCAD has the perfect system for you --- ScanPLACE. Please check ou
Electronics Forum | Wed Nov 10 17:39:34 EST 1999 | Dave Vulcano
Hello, Looking for some insight. We just finished a run and experienced a lot of solder balls. We used a no clean paste, nitrogen atmosphere reflow oven, and saw the solder balls on 1206 - 0805 chip components. All of the solder balls appeared and
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