Electronics Forum | Thu Jan 13 09:18:28 EST 2005 | davef
We agree that coating BGA solder balls with conformal coat is a bad idea due to differences between the z-dimension thermal expansion between the conformal coat and solder.
Electronics Forum | Fri Jan 14 17:09:21 EST 2005 | Bob R.
Whether or not conformal coating creates a reliability problem if it bridges the gap between the board and bottom of the part depends on the properties of the coating. A low modulus coating is fine, but one thats modulus increases at colder temperat
Electronics Forum | Wed Jan 12 15:32:08 EST 2005 | SuePH
Thanks for the replies. I use a foam fluxor, so the pallet is well fluxed. This is my first expierence with this thick of a pallet. Maybe Russ has a handle on it when he says that the wave height is just too high.
Electronics Forum | Wed Jan 12 16:11:26 EST 2005 | russ
I have seen the solder shoot out at least 4"-6" from both the leading and trailing edge when this happens. If the open pockets are real deep you may want to use a turbulent/chip wave for soldering, sometimes this leaves bridges however.
Electronics Forum | Wed Jan 12 15:40:51 EST 2005 | pemnut
We have a CRT RTI-6500. I have heard that a company in Ca. now supports the CRT line. Does anyone have info about this? Any help would be great. Thanks in advance.
Electronics Forum | Thu Jan 13 09:27:08 EST 2005 | Chunks
That company is now Yes Tech. (Yield Enhancement Solutions) Web page is WWW.YESTECHINC.COM 1317 Calle Avanzado San Clemente CA 92673 Phone: 949.361.2714 Fax: 949.361.2724 Email: info@yestechinc.com
Electronics Forum | Wed Jan 12 17:47:13 EST 2005 | Dreamsniper
I wanna make a MSExcel spreadsheet that will automatically convert Percent Area of a BGA void to Percent Diameter. What is the formula? Thanks and regards,
Electronics Forum | Fri Jan 14 13:48:36 EST 2005 | Frank
The area of a circle = pi * radius^2 radius = squareroot(area/pi) diameter = 2*radius Is this what you were looking for?
Electronics Forum | Thu Jan 13 13:15:47 EST 2005 | msjohnston1
I'm looking to automate my PCB labeling. Anyone have any insight (especially first-hand users) into this type of system?
Electronics Forum | Thu Jan 13 13:23:24 EST 2005 | scotceltic
Try Hover-Davis. They make a feeder that most popular brands of pick and place machines can place labels from. You can purchase one that you put your own labels on or you can spend more and get the Label Generator feeder.
