Electronics Forum | Sat Mar 01 08:17:40 EST 2003 | davef
You're correct that the FR4 is probably the best choise. The majority of the problems in developing your reflow recipe is going to come from the CTE mismatches in the CCBGA , CBGA and PBGA that you put on the board. The other side says given the pr
Electronics Forum | Fri Feb 28 13:09:49 EST 2003 | russ
Check out out hot bar equipment, we used to do this with very good results. I am sorry that I can't remember the manufacturer to help you check into this. If you are not familiar with this here is the process in a nutshell, place assy and connector
Electronics Forum | Mon Mar 03 11:23:04 EST 2003 | MA/NY DDave
Hi If you don't know what these puppies are, HAVE the customer specify them. You will be MUCH Safer in the long run since if you choose the wrong value they will COME Back at YOU. He might even need a network of .1 .01 Piles of places to read; Bo
Electronics Forum | Fri Mar 07 14:48:34 EST 2003 | gdstanton
Pretty much everything under the sun. For example if Company A wanted to hire Company B to build printed circuit cards designed by Company A; What type of T & C might Company B seek in their contract/agreement with Company A? The following things c
Electronics Forum | Fri Mar 21 11:25:07 EST 2003 | jonfox
His subject line is "Tantalum caps causing misaligned parts". Come on guys, I think he answered the question already. Is there any via/traces that connects the pads of the TANT to the 0805 and the BGA. Your two parts may be physically the same, bu
Electronics Forum | Mon Mar 31 09:57:04 EST 2003 | MA/NY DDave
Hi Well at least we agree on the UnJust Blood for Bush/Blair Valor War. Hey even the Falklands was a more-just engagement. Now those battles with those Aborigines that strive to Kill each other at spear point is a more INTERESTING combinational ques
Electronics Forum | Tue Apr 08 11:52:34 EDT 2003 | Chrissie
I am currently trying to creat a model to calculate attrition on our SMT line. A new product is coming into our cleanroom and we have problems with the current product and atttrition levels. One of our main problems is a large batch for us (space ind
Electronics Forum | Fri Apr 11 13:59:06 EDT 2003 | MA/NY DDave
Hi Wow, Quite elaborate. My Mechancial Engineering, Thermo friends would be proud of you. I am not kidding. The only problem I have with your technique is that quite often internal lands and structures steal the heat during soldering. By your techn
Electronics Forum | Thu Apr 10 14:35:18 EDT 2003 | russ
What flux are you using to put them back on? you should be able to adequately clean the site after removal with alcohol or water depending upon the type of flux. "White grungy" usually comes from a liquid flux such as Alpha 857 being squirted on th
Electronics Forum | Wed Apr 23 11:58:42 EDT 2003 | russ
If it is a very large factory you are doomed! You will never get the enviroment right someone is always going to be too cold, to hot, to muggy, to loud, I personally like the temp at about 72 F , humidity about 15% (ESD or MSD? which flavor do you w
