Yes Steve,

These ceramic babies are space shuttle insulators. Only way to get heat to the balls, board, and solder paste is under and through the sides.

This profile is kinda what I envisioned based on some similar with CCGA's. The big difference is there's 70 mils from board to part with them as that's how long the columns are and they don't squat.

That "soak" zone really impresses me as it has to bring everything up to equillibrium - like all profiles but you know that. Sure was nice of Kerry to share his success. My ex supplier's profiles looked just like the solder paste supplier's. Don't quite cute it.

I know you'll have fun with this stuff. As soon as the order is approved, I'll send you a sample board with which to play.

Have a good weekend,

Rams 38
Pats 14 only because the Rams will let them have some fun in the fourth.

Earl
  ----- Original Message ----- 
  From: [log in to unmask] 
  To: [log in to unmask] 
  Sent: Friday, February 01, 2002 1:50 PM
  Subject: Re: [TN] SOME VERY INTERESTING STUFF AND REFLOW PROFILES TOO


  Hey Earl! 

  The profiles are up. Go to: 

  http://www.stevezeva.homestead.com 

  The successful one looks interesting from the setpoints...really pouring the coals to the board in the beginning huh? Gotta heat-up all that ceramic stuff... 

  -Steve Gregory- 



    About the reflow profiles - I've asked Steve to place two images on his 
    site. The first is a recommended paste supplier profile. The second is a 
    successful profile for soldering the ceramic CSP's about which we've been 
    talking. I don't know if my new best friend Kerry wants his name mentioned 
    as the one enjoying such success, so I won't. He solders these things 
    routinely as about 60 per board with many other BGA types as well. 

    MoonMan