Electronics Forum | Thu Sep 19 11:14:45 EDT 2002 | Jim M.
We had lots of problems with bridging on 15.8mm pitch, QFP17-160 at the start.The board was .032 thick, double sided-six boards to a panel. Here is the problems (not neccessarily in the biggest to little but as i remember them) and solutions that he
Electronics Forum | Wed Sep 25 09:24:54 EDT 2002 | caldon
Michael- Please when concidering you U-sonic machine, keep in mind possible chemistries Petroferm, Kyzen, Aqueous technologies, and Zestron products. All are good products and all need to be evaluated with your stencils. Depending on your component t
Electronics Forum | Thu Oct 24 17:23:12 EDT 2002 | slthomas
The logical course seems like you would just back off on the shot size or go with a smaller diameter nozzle, but if this is something new and you've been running fine up until recently then something has changed. Check the condition of your nozzles.
Electronics Forum | Wed Oct 30 12:32:10 EST 2002 | dragonslayr
Have you tried doing a reflow of the BGA with the connectors removed? This should solve the question of connector proximity giving you a problem. Also, try rotating the board 90 deg in your rework station before reflowing a BGA. Be sure to rotate th
Electronics Forum | Thu Oct 31 12:14:35 EST 2002 | dragonslayr
I used to take required lead blood tests every 3 months and when the lead content rose high enough I had to work in another area of the plant, away from the lead. What lead is in my body will always be there and is a potential to cause of nerve damag
Electronics Forum | Wed Nov 06 08:59:51 EST 2002 | rmorford
This defect is there after reflow. My first thought was that the boards had some sort of contamination, too. This is a new PCB manufacturer for this board (they have been making other boards for us). But... why only on the connectors -- why only o
Electronics Forum | Wed Nov 20 16:27:15 EST 2002 | pjc
FYI: MPM does in fact offer alternate board support tooling than the vacuum box system. They have the X and Y snugger tooling, which clamps the board and uses magnetic support pins. If you are looking at a used UP2000, check to see what tooling it ha
Electronics Forum | Thu Nov 14 12:11:00 EST 2002 | V.RAMANAND KINI
I am looking for a reflective coating on PCB. I have designed a PCB with SMT type side LEDs and Top LEDs. The light from these LEDs fall on to a lens profile on top of these and get mangnified and reaches the dashboard instrument's pointers. I tried
Electronics Forum | Thu Nov 28 20:00:42 EST 2002 | iman
ran an internet search on "intrusive reflow", out popped various links on the subject. Bob Willis was rather prominent on the topic's links. anyway seems intrusive reflow soldering specs are the same as conventional manual insertion (radial, axial)
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
