YIKES!!!! (As he screams running away!) Definitely no experience with this stuff, but thinking outside the box, but seeing how it's going to be bolted to the board, what about a CGA with Z-axis conductive epoxy? Check this link out: http://www.aitechnology.com/soldersub.html Just a wild thought... -Steve Gregory- Hi Guys, Major problem! We have a quad flat pack that is 51 mm body size and am trying to consider the best approach for assembly (Stevie boy. betcha you jump in on this one!). The problem is that it is to be used on two boards & turns out an estimated 8 Watts best board to 18 Watts worst board. On one board this sucker need to dump the heat into the board & on the other dump it from the top ie. heat sink fitted to the top. To make life even easier the rascal needs bolting to the board.......great for automation.......not! Anyway, the termination considerations are Cin-apse (Manufacturers test data doesn't cover our range for stringent Stress screening) Gull wing (Got real bad experience of trying to assemble these components with a thermal pad underneath) CGA (area array) - not sure if this size of component would withstand the Stress screening Well chaps you can see the dilemma I'm in....what do you think? P.s. you've probably guessed it's Military! Here's hoping, Iain. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------