Electronics Forum | Mon Nov 25 12:16:03 EST 2002 | Dragonslayr
I have conducted 2 BGA rework studies over the last 3 years or so. Each time I came to Air-Vac as the prefered machine. I looked at all the models mentioned in the other posts here plus a few more. As a final step in the study I took the actual oper
Electronics Forum | Mon Nov 25 12:57:29 EST 2002 | caldon
Maxtim- I have used APE's Sniper, airvac, Mecal's 3500, PDR, Pace, and MArtin's rework stations. APE Sniper does the Job but to much automation and not user friendly software. PDR is to much IR and no convection. Metcal's work good now with the ne
Electronics Forum | Mon Nov 25 20:24:13 EST 2002 | bcceng
Maxtim, Again I have implemented BGA rework in four CM's and the machine that I have selected is the Conceptronics. In contract manufacturing you will have to be prepare to rework from the smallest to the largest boards with lots of ground planes. Co
Electronics Forum | Fri Nov 22 13:41:55 EST 2002 | cristiano
We are experiencing problems with a smartmedia connector during the reflow solder process. The connectors stay a little bended after the oven. In this case the middle leads are not solded, because they stay with no contact on the board. The conector
Electronics Forum | Sat Nov 23 10:19:39 EST 2002 | davef
This sounds alot like the warping that we all see periodically in BGA. CTE of material is temperature dependent and not temperature changing rate dependent, so you are pretty much hosed by the physics. Regardless, I do like trying like crazy to g
Electronics Forum | Mon Nov 25 12:32:20 EST 2002 | davef
Now that is a BIG step. Stencil type: * A metal squeegee is fine with stepped stencils. * A rubber squeegee is fine with stepped stencils. Comments on step stencil "keepouts" are: * Use an ample space around the stepped down component pads that is
Electronics Forum | Thu Jan 02 15:32:26 EST 2003 | Mark
Hello. Sometimes metal squeegees DO work with stepped stencils. You will always get much better results with metal squeegees compared to polymer blades. The only requirement for the metal squeegee to work, you need about 0.06 in clearance for eve
Electronics Forum | Mon Nov 25 16:12:52 EST 2002 | russ
there is a good article by AIM solder regarding tin. In a nut shell, if you do not apply flux or heat to tin finish you will never degrade it! I agree with the others that you need to check the thickness of the pure tin layer. We have forbidden ti
Electronics Forum | Mon Nov 25 20:38:39 EST 2002 | davef
That's basically it. In a wonderful world, the oxides flow on top of the flux during heating through reflow. Obviously when compared to reflow soldering, you create much more dross with your wave by: * Pumping a large volume of very hot solder to h
Electronics Forum | Tue Dec 03 12:31:34 EST 2002 | ianlg
Hi Brad If you looking for an excellant new product check out Reprint Services ( http://www.reprintservices.co.uk ) Their R29 Screen printer is selling well in the UK and Europe and has just been launched into the far east. Due to launch this into t
