Electronics Forum | Wed Dec 11 01:06:28 EST 2002 | iman
Was visting a production floor, of an SMT assembly line, and saw operators using mechanical pencils to write "process stage identification markings" onto the SOIC packages, after the post-reflow inspection. was wondering if such pencil markings is c
Electronics Forum | Wed Sep 08 17:49:19 EDT 2004 | gregoryyork
Knock off some balls and you may find it has a flat bottom to it were it has mechanically stuck to the solder resist usually seen under 60X magnification. Common with Liquid photoimageable resist (I know again) Best way to check resist cure is to pay
Electronics Forum | Wed Aug 09 19:14:15 EDT 2006 | Board House
Our Manufacturing policy regarding welds is as follows. 1) Inner layers - depends on Core thickness and line width. Our shop will not do any welding on core thickness less then 5 mils. or line width less then 5 mil. Good AOI practices reduce the a
Electronics Forum | Mon Nov 12 18:08:37 EST 2007 | samir
That's when you give that "Supervisor" a tall glass of SHUT THE F*CK UP. I betcha you regret even mentioning it to him. I'd have just made up some techno-babble and switched it regardless. Told him something like - "pure IPA will act as a catlyst
Electronics Forum | Fri Nov 03 15:43:20 EDT 2017 | dleeper
IPA and DI water are both very common and effective methods of cleaning PCBAs. http://www.zestron.com/sa/cleaning-applications/smt-electronic-cleaning/pcba-cleaning/aqueous-cleaning.html http://blog.gotopac.com/2010/11/18/ipa-as-a-universal-cleaner
Electronics Forum | Fri Jun 07 11:39:33 EDT 2019 | gregoryyork
I feared so. The only thing to be done is to tell the PCB manufacturer to increase the Thermal cure so dont set the oven to 150C but to 170C and actually measure the middle board and once it hits 155C then give it an hour cure from then. Also insist
Electronics Forum | Wed Jun 24 15:46:26 EDT 2020 | kumarb
The blue handle CL feeders are 4mm advancement pocket to pocket - suitable for 0402 devices. The green handle CL feedersare 2mm advancement pocket to pocket - suitable for 0201 / 01005 devices. According to Elissa, she did not recommend the use of
Electronics Forum | Fri Feb 23 17:35:49 EST 2001 | mattias
Ok. F.Y.I How I could make this work: We use Almit V14, and SMT ovens. You can say that we don�t do our maintenance as good as we should. Our Smt Quattro peaks are equipped with process gas cleaning (wich works quite good actually) I ripped out the
Electronics Forum | Mon Aug 23 11:27:00 EDT 1999 | Dave F
0.6 �m (25 micro inches) and self-limit around 5 mils depending on the material being plated and the process. Similarly with white tin, laminates with cleaned copper are immersed in a series of tin baths without an external source of electric curren
Electronics Forum | Tue May 25 11:40:23 EDT 1999 | Steve Gregory
Just a note about cleaning stencils with a mixture of alcohol and water, especially if you're using no clean paste, it's really not recommended. Don't take my word for it, you can check with Alpha or most any other solderpaste vendor. What will actu
.gif)
