Electronics Forum | Fri Jun 06 07:23:18 EDT 2003 | johnw
Hi Kevin, the profile doesn't actually qualify something as lead free or not it's purely the Pb content of the assembly that does this. Currently the understanding of the limitations of the lead in the jont is 0.1% by weight or less. So as long as y
Electronics Forum | Wed Feb 04 03:30:56 EST 2009 | smartasp
Hi All We intend to switch fro SAC305 to SN100C, which has been giving us great test results. Unfortunately we have a technical guy at head quarter, which refuses to accept the SN100C as it has a 10 deg C higher melting point as SAC. I argue besides
Electronics Forum | Mon Dec 27 18:44:14 EST 2004 | Mark
I am testing some BGA's (PBGA 30mm x 30mm) to evaluate the maximum ramp rate we can achieve in our reflow oven. Temperature is being measured at the body(top) of the component / not leads. After several trials (with various oven settings), the high
Electronics Forum | Thu Nov 02 17:15:34 EST 2000 | Erdem Bilaloglu
We are using semi-circular land pattern and 0.004" smaller appertures on screen. With stable rising slope (max:2.6degC/sec)we have not experienced any tombstonning so far.
Electronics Forum | Sat Oct 21 12:55:14 EDT 2000 | Aaron
It sounds like the temperature of wave is a little lower. It should be 245~250 deg.C for solder Sn63/Pb37.
Electronics Forum | Thu Mar 15 17:28:44 EST 2001 | rentreo
Sounds like a problem I ran into recently. In my case it was a problem with via holes which were used as test points on our in-circuit tester. My problem was caused by moisture in the boards. My cure was a 24 hour bake at 100 deg c.
Electronics Forum | Tue Jun 12 09:30:42 EDT 2001 | Rob Fischer
I assume the material you are using is black. This may sound far fetched but try using a lighter color material. Going from black to gray has given users as much as fifteen degrees F. less in heat loss.
Electronics Forum | Tue Jun 12 11:28:30 EDT 2001 | CPI
Rob: Wouldn't that only apply to IR ovens. If using a true convection oven the color of the material wouldn't hinder output at all "Right". Don�t want to see someone spend money on new tooling if unnecessary.
Electronics Forum | Thu Jun 14 01:04:57 EDT 2001 | procon
Ian, It appears to me you are trying to reflow the star wars project. All this talk about thermal absorbtion, heat differential, etc., it' only a reflow profile? If you read back over the suggestions of all other memos, you will find the solution.
Electronics Forum | Tue Jul 10 04:23:55 EDT 2001 | winnifred
Dr Lee, What is the best recommended setting temperature for solder iron station? 350 deg C ?? The contact of iron with the pad/lead should be for about 2-3 sec, is that true ?
