Electronics Forum | Mon Oct 14 18:27:38 EDT 2002 | kennyg
In regards to baking an assembly prior to hot air (BGA) rework.... 1) Do people always bake, sometimes or never? Does this depend on whether MS sensitive components are near the rework site? If a BGA is to be removed and reballed, baking is a no-br
Electronics Forum | Mon Oct 21 11:49:20 EDT 2002 | sueph
Mike, We are currently wave soldering several assemblies with with a lot of ground plane. The soldering handbook we have in house suggests a preheat temp for metal core multilayer boards of 230 to 270 degrees F' (110 to 130 C'). It was scary at fir
Electronics Forum | Mon Oct 21 18:31:45 EDT 2002 | MikeF
Mike, If your wave solder machine doesn't have enough preheat capacity you can put the board in an oven and warm it part way before you put it into the wave solder machine. This works best with a spray fluxer, as a warm board will collapse the foam
Electronics Forum | Thu Oct 31 08:02:12 EST 2002 | davidweir
we are looking at buying an screen printer and are curretly have an mpm up1500 and dek ela on the shortlist both silimar spec's except mpm has automatic tooling. being a cem having to change set up a number of time a week quick change over is a co
Electronics Forum | Fri Nov 08 09:24:16 EST 2002 | rspoerri
Hi, I'm setting up an new production line for cell phone manufacturing and am looking for a second printer for the back half of the line. I am looking at both new and used though used is looking pretty attractive due to the glut of equipment curren
Electronics Forum | Mon Nov 11 10:29:37 EST 2002 | Yannick
Hi, I'm beginnig working with BGA and with test I made I see some Void in it. I know that IPc have something on it. But I would appreciate if someone who have a good knowkledge about it contact me at: yb@m2s.ca Or can you give me some hint t
Electronics Forum | Mon May 12 10:26:32 EDT 2003 | jasonr
Hello Sergio, Are you interested in starting-up yourself or looking for established CM provider in China? Please contact me at below coordinates if you are thinking of setting up shop for yourself. Thanks & Regards, Jason Robotham Sales Manager
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 | 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 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
