Electronics Forum | Tue Aug 22 08:15:34 EDT 2000 | Mark
I have a customer that has a wrong pin out on a TSOP32. The Raw PCB is expensive, "time to market concerns", and respin lead times are forcing an alternative solution. He would like to design a "conversion" daughter board with the correct pin out to
Electronics Forum | Tue Aug 22 13:19:24 EDT 2000 | Travis Slaughter
Depending on how wrong the pinout is another possibly a little less ugly option would be to bend the wrong pins up then wire them to the correct pads after reflow of the correct pins. You may want to trim the ends of the pins a bit use heat shrink or
Electronics Forum | Mon Aug 21 10:52:23 EDT 2000 | Ron H
Problem: Flux remains on the board in the masked areas after the wave solder process. We use Multicore X32-10m no clean flux. There is no post wave cleaning. While the flux residue is not conductive, it is unsightly and it may interfere with a be
Electronics Forum | Tue Aug 22 05:10:56 EDT 2000 | Wolfgang Busko
Ron:It�s tricky to get what you want with this foamfluxers espacially using pallets. They got to be cleaned regularly. Most of the time excessive residues are removed using brushes which adds another process step. It should be better using a sprayflu
Electronics Forum | Thu Aug 24 05:44:10 EDT 2000 | Wolfgang Busko
Me too. It was the first time that I heard about that "preheated pallet thing" and wonder to what temperature and with what kind of equipment it is heated up. Do different handling and transporttime have any effect on the resulting board temperatur
Electronics Forum | Mon Aug 21 09:11:30 EDT 2000 | Eric Soderberg
Currently use Hysol TS300 latex mask and need to explore alternative methods of drying the mask. The mask is applied with a Asymtek Century Dispenser and placed on drying shelves. Air dry is dependent on temperature/humidity. Tried all the UV masks o
Electronics Forum | Sat Sep 02 09:59:39 EDT 2000 | Dave F
Hey Gyver: I was just spoofin' ya about the deionized water (DI). Water of any type will probably make your solder connections go white. I posted your question to Dr. Lee on the latest OnBoard Forum. I suggest you check his responses. I short he
Electronics Forum | Mon Aug 21 20:20:18 EDT 2000 | Dave F
Hi CJ: I guarantee you that the portions of you BGA that will physically move the most as a result of changing temperature are the corners. For this very reason, many BGA have BT substrates that have a tg of 210�C. I would demonstrate the potentia
Electronics Forum | Tue Aug 22 12:14:21 EDT 2000 | Tekguy2000
There are concretions that form inside the chamber when using a water soluble paste. They start forming and affecting print as early as 2 days. This is apparent no matter what type of print head you may be using. There has been over 30 water soluble
Electronics Forum | Thu Aug 17 05:56:39 EDT 2000 | Jacqueline
Hi Folks, Hope yous can help. I'm having a problem when reworking (placing) 40mil BGAs. One side seems to be collapsing more so that the other, resulting in the outer row of balls not properly reflowing and making the connection. This is only happeni
