Electronics Forum | Thu Jun 24 12:02:59 EDT 2004 | russ
I have never done these components before, but if you have performed capability studies on your dispense equipment you should be able to tell if this is feasable. I can tell you that 0402 and 0201 especially 0201 requires great accuracy and volume.
Electronics Forum | Fri Jun 25 09:19:12 EDT 2004 | tjensen
60-70% RH will be a challenge if you are running a water wash solder paste (and could be the reason you are seeing the problems). If you are running a no-clean, humidity should not be an issue. As long as the profile looks OK, I don't think the con
Electronics Forum | Sat Jul 03 08:52:19 EDT 2004 | davef
Q1: What's the difference between static and dynamic viscosities? A1: Static viscosity is the viscosity of the solder paste as it is dispensed off of a tube or syringe onto a screen printer. Dynamic viscosity gives the variation in the thixotropic b
Electronics Forum | Thu Jul 22 12:02:52 EDT 2004 | lloyd
I'm currently having issues with a 28 terminal MLP package. I have only recently started in a new company and it seems as though the manufacturers guide lines as to pad geometry do not work (at least for us). So I now have a situation where I have 4
Electronics Forum | Wed Aug 18 10:34:35 EDT 2004 | russ
We do this every day, We print the bottom side, then the top, and have a tool that presses the connector on. We then process the board down the line. The only tricky thing is keeping fingers out of paste. Fortunately this is a single sided board.
Electronics Forum | Thu Aug 26 12:28:57 EDT 2004 | rlackey
OK Greg, I'm sorry, I'll go & stand in the naughty corner. On a serious note, can elements of your machine database be outputted in a format that can be loaded (or backflushed)into an MRP, ERP or stock program (.TXT file or something)so that you can
Electronics Forum | Thu Sep 09 11:30:03 EDT 2004 | Tim Lawrence
Hi I came across this article while writing a paper. I don't know if it's the first, but it is early wave soldering: W L Oates, "Automatic Soldering Machines for Printed Circuit Board Assemblies", IRE National Convesntion Record, Vol. 6, No. 6, pa
Electronics Forum | Thu Sep 16 07:07:34 EDT 2004 | C Lampron
Hello Chris, "It sticks up about 3/8" or so above the surface of the board." Is this over the ridgid portion of the PCB or in between? Is it possible to create a support fixture for printing that has relief that will allow the flex to bow downward i
Electronics Forum | Fri Sep 17 13:24:27 EDT 2004 | Bob R.
I also agree with Russ - we use step stencils when we have to but generally try to avoid them because the print isn't as consistent as with a single thickness stencil. Many of our products are for harsh environments so we do a lot of thermal cycle a
Electronics Forum | Mon Oct 11 15:21:20 EDT 2004 | russ
I have heard of making square apertures for round pads to aid in Xray and possibly allow for better release in some applications. The square aperture in your case would be for Xray inspection and not release. Usually a 20 mil square would be used f
