Electronics Forum | Mon Jun 18 10:14:30 EDT 2001 | surachai
HI ALL; I WOULD LIKE TO KNOW THAT ANYBODY CAN RUN GLUE PRINTING PROCESS WITH 0402 CHIP AND PASS THEM TO WAVE SOLDERING PROCESS ,PLEASE GIVE ME THE INFORMATION ABOUT THEM . 1)HOW WIDE OF APERTURE DO YOU OPEN ON YOUR STENCIL? 2)HOW MANY YIELD OF THIS P
Electronics Forum | Tue Jun 26 10:49:59 EDT 2001 | genny
Yes I have read that standard, but it doesn't tell me what I need to know. Both have the same activity level and halide rating (L0) The AIM technical guy told me RO is a natural gum rosin, while (RE) Resin has more processing or something (maybe so
Electronics Forum | Thu Jun 21 10:47:55 EDT 2001 | caldon
Glenbrook has a solution. I do not know what your definition of low cost is but Glenbrook offers an inspection solution an x-ray system and an endo scope (ersa scope type) for low cost. Contact Steve zweig at (973) 361-8866. They have some great soft
Electronics Forum | Fri Jun 29 23:10:02 EDT 2001 | Danial
Thanx for the reply guys!! The problem happened on only one PBGA, the balls are eutectic and the paste volume height is at 5.96 mil min. The stencil opening has been increased to 30 mil which initially was 20 mil. You guys are right!! One probable
Electronics Forum | Thu Jun 28 10:58:28 EDT 2001 | brownsj
The question is are you talking of a reflow or wavesolder process. If your talking reflow I used to use a stepped stencil to ensure I had sufficient paste and then make a double pass with my squeegees. First pass with a 45 degree rubber squeegee to f
Electronics Forum | Wed Jul 04 10:40:51 EDT 2001 | nifhail
I have thousands of old datecode PCBs which has an Entek and HASL finished. Entek PCBs are about 6 � 1.5 years old and HASL boards are at 1 - 2 years old. To make it worse, some of them came in the loose form, no vacuum seal� nothin�. As for the HA
Electronics Forum | Mon Jul 16 21:29:03 EDT 2001 | davef
Cleaning RMA with water is bad news. It will turn your solder connections white and remove none of the RMA residues. There was a thread on removing RMA within the past two weeks on SMTnet. Check the fine SMTnet Archives. Additionally, look at M
Electronics Forum | Fri Jul 06 00:22:49 EDT 2001 | DL
Thanks Dave, and yes we can leave the solder there in this instance. These panels, 12up, are NCMR from the customer. The customer is saying that after the panels have been reflowed 5 times! solder starts to accumulate under the mask. Get this, My sen
Electronics Forum | Sun Jul 15 20:10:09 EDT 2001 | Danial
What is the best method to repair Warped PCBA. Obviuosly twisting it back to make it flat would be a disasterous. The method that I've tried wold be mounting the assembled board to the flat holder with the clamp and bake them at 120 Deg C for about 4
Electronics Forum | Wed Jul 18 11:19:58 EDT 2001 | genny
I didn't wade thru all of the info you presented above, but your comment about ampacity of printed circuit boards brought to mind a copy of an article I keep in my files. Luckily I photocopied the whole page from the magazine and can actually tell y
