Electronics Forum | Tue Nov 28 13:26:59 EST 2000 | Graham Naisbitt
Terry Sorry, I just re-read your question and failed to answer all your questions: Shadowing only applies to coatings that are UV curable. Neither of these are UV curable. You do not want this technology for 3 dimensional assemblies, it is too expe
Electronics Forum | Mon Nov 27 12:17:02 EST 2000 | Dason C
Chris, you are not completely right. Our industrial is following the IPC standard as our guideline. Per IPC J-STD-033 has specify the floor life at para. 8 (normal condition at 30C/60%RH). If Victor can control his environment at 32% then the compo
Electronics Forum | Tue Nov 21 16:58:20 EST 2000 | blnorman
Does anyone have any experience with solder paste recovery? Specifically, partially emptied solder paste tubes. We are currently looking into ways to reduce and potentially eliminate solder paste waste. One of the largest contributors is partially
Electronics Forum | Tue Nov 28 21:03:48 EST 2000 | Dave F
Getting people to stop sounds like a good idea, but once they get running after a lengthy set-up, you can sort of understand why they don't want to stop when they quickly run out of paste after emptying a partially filled tube. Beyond the paste qual
Electronics Forum | Mon Nov 20 10:22:18 EST 2000 | Sheng Jin
Hi: Many 75ALS573DW parts we reveived lately from one of our vender have some problem with its pin 2, an output pin of the tranciever ( probably resulting from EOS damage). Its impedance verse GND should be normally 3M ohm up. The parts we have measu
Electronics Forum | Mon Nov 27 17:39:37 EST 2000 | Dave F
Daniel: In response to your questions: * Moisture level (wt%) that may cause delamination in PCB�s. - Certainly, it depends, but 100% moisture will not cause delamination of a PCB. [Now, heating that water is another question, isn�t it? ;-)] *
Electronics Forum | Mon Nov 20 04:39:19 EST 2000 | SV
Hello, I have to design a PCB for which the customer have the following temperature requirements: -55degC to +85degC operating temp. -61degC to +125degC storage temp. My question is: does the FR4 material meet this conditions? Which are the parame
Electronics Forum | Fri Nov 17 05:40:48 EST 2000 | Wolfgang Busko
Hi Dave, I think your approach is more than some others do as incoming inspection. We just look for - damage of any kind - measure the thickness - measure a critical aperture for the correct size (reduction) - look for smooth walls - do Earls "look
Electronics Forum | Mon Nov 27 17:23:56 EST 2000 | Dave F
Thanks guys. Following on Cal's point ... we ordered a recently released IPC guideline, seeking closure. 7525 - Stencil Design Guidelines This new document provides guides for the design and fabrication of stencils for solder paste and surface-mou
Electronics Forum | Thu Nov 16 14:22:48 EST 2000 | Kris
Howdy Y'all, I have seen a problem lately with getting the 0402 parts out of the tape and onto a PCB. We are using Universal HSPs with 8 X 2mm feeders in good condition. The components are manufactured by Rohm. The tape and components appear to b
