Electronics Forum | Thu Jan 05 15:42:26 EST 2006 | samir
Grant, The strength of the joint in a CCGA is the column for one...it's more ductile, made out of 90% Pb, and it's meant to compensate for the massive CTE mismatches between the ceramic and the board (ie the columns flex to relieve stress from the e
Electronics Forum | Fri Jan 20 11:35:34 EST 2006 | Mike Dolbow Atotalgps.com
From what I have seen some component terminal finished have a problem due to storage also. I have seen pure nickel finished turn black. I have seen silver barring finished have problems too. It all depends on how you chose your process, PCB plating,
Electronics Forum | Sat Dec 03 02:10:59 EST 2005 | Homer J
1. What are we talking about: pcb:s or pcba:s? 2. What exactly do you want to attain with this board test? 3. Are you a pcb manufactor or a pcba manufactor? 4. You did not mention what type of boards you want to test? 5. Mechanical, operating enviro
Electronics Forum | Wed Dec 07 14:55:14 EST 2005 | Samir Nagaheenanajar
Here in Rihad, I am in the midst of Pb-Free implementation, and most of our paste manufacturers have advised that with the higher peak temperatures, you need to retain the activators as long as possible. I have changed our profiles to a more gradual
Electronics Forum | Sat Dec 03 16:32:47 EST 2005 | grantp
Hi, I found one of the best features of profiling software was if the software can do the analysis of the profile for you and tell you how far out of the process window you are, and let you simulate oven temperatures and then give you a best guess o
Electronics Forum | Mon Dec 12 11:53:51 EST 2005 | rhorowitz
Dear Mr Duckman, Please disregard the statement written by csommers. We at MIRTEC have no record of any of our machines being evaluated by any company for a two month period and returned under the criteria as stated by csommers. Quite frankly, we fi
Electronics Forum | Tue Dec 20 15:17:18 EST 2005 | cliffcall
Holiday Greetings, Are you looking for in-line or benchtop AOI? My company, Testronics had decided a few years back to only produce benchtop AOI systems. If a benchtop system is suitable for your application might we request you take a look at our A
Electronics Forum | Mon Dec 05 17:53:04 EST 2005 | KEN
I hate to sound like a broken record but the industry has been placing lead free through-hole parts forever. Now all of a sudden its a problem??? Gold finish, silver, silver paladium, alloy 42, even pure copper. Reliability will be a function of t
Electronics Forum | Sat Dec 10 14:20:32 EST 2005 | adlsmt
I have seen a similar problem once about 15 yrs ago. Someone decided to try a water wash flux for tinning wires. Bad idea! The wires were dipped in the flux, then in a solder pot. As the lead tin's it forces the flux in the strands to move up the wir
Electronics Forum | Thu Dec 08 10:48:21 EST 2005 | JP
Thanks Russ. As I was writing the post, it crossed my mind that stencil thickness is probably incorrect. I did not question the thickness because it was something that has been discussed with our stencil fabrication shop. When we were ordering mini
