Electronics Forum | Thu Feb 11 08:14:41 EST 2010 | scottp
It's OK to have the daisychain done in the interposer rather than the die (and a lot cheaper) but in thermal cycling the parts MUST have representative die. That's where a large part of the CTE mismatch comes from to cause fatigue damage. Thermal c
Electronics Forum | Tue Feb 09 13:47:46 EST 2010 | davef
BGA rework equipment: Search the fine SMTnet Archives to find threads like: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=48736 Use x-ray inspection to identify the obvious defects such as shorts, missing balls and gross solder voids.
Electronics Forum | Tue Feb 09 08:48:29 EST 2010 | davemacnemo
Machine has 2 FlexJets installed. Working fine until it started giving Theta1 following errors. Machine will not zero. Coincidental (I think) with this, the Low Power Power Supply behind the Power Distribution Panel failed and was rebuilt. It's worki
Electronics Forum | Tue Feb 16 09:37:05 EST 2010 | davemacnemo
Stumbled around in the data management section for a while and found that the board origin somehow got its sign changed from -ve X value to +ve :o/ - Is there any way to change the colors on the display. Someone has made some really bad choices (blac
Electronics Forum | Tue Feb 09 16:31:37 EST 2010 | jax
Basically it states that you cannot have Field Returns in the same area as Work In Process. You must have a way to clearly identify and seperate the two different types of product... In your ERP/MRP/ShopFloor/etc... as well as physically. The preferr
Electronics Forum | Fri Feb 12 05:53:32 EST 2010 | muarty
Hi Flipit, One of our customers has recently changed to this type of finish on their PCB's, due to them wire bonding MMIC devices in their factory after we do the SMT build. We found that we had to change all of our stencils for these products, as t
Electronics Forum | Wed Feb 10 22:32:22 EST 2010 | davef
"Because of the rapid curing features of this product, large amounts of heat are generated when large masses of material are mixed at one time."[ITW Plexus MA310 TDS] Questions are: * Have you looked at the exotherm curve for this stuff? * Can the c
Electronics Forum | Thu Feb 11 12:02:47 EST 2010 | plaiming
We have temporarily switched to an RTV for the vibration reincforcement, but it is not compatible with acrylic conformal coating and we really do not want to switch conformal coatings to a silicone based. Additionally we are testing the product in h
Electronics Forum | Thu Feb 11 15:51:22 EST 2010 | baildl632
Universal Sequencer, VCD, Radial, or Unimod(DIP installer) machines! We only still have and run our Universal/Berg pinning machine. I can't say they will work any better than humans do as humans will have to run and maintain them though. We did get g
Electronics Forum | Thu Feb 11 17:15:08 EST 2010 | davef
Certainly, machinery provides better quality for repetitive tasks than manual methods. In looking to improve the quality of manual methods, there are things that can be done. Some of those things have been discussed in earlier threads here on SMTne
