All that's been said about CCGA's, by all saying it, is true. Not much bigger deal than BGA's but bigger and much heavier parts. Best solder joints possible with those "flexible" columns and solder fillets at joint level. Machine vision offers biggest challenge, as someone said. Rework must be considered as well. That's the most fun but very doable. Done hundreds of these using cast, not clasp, columns from IBM. With columns about .070" long, inspection not too tough. Whoever noted it very important to ensure columns straight said it right. When bent, I used an engineering scale to "comb" the little muthas straight again. Pretty forgiving those columns when a little bent but not so when abused. MoonMan --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------