Hello Again, Should I (if there is room) place any groundplane (tied to 0v below) underneath a MQFP208 chip, on the top copper/SMT side? Or would this absorb some of the heat when it is being heated, and consequently cause it to have poor solder connections? (amongst all the other reasons for there being poor soldered joints ;-)) Matthew Lamkin. --------------------------------------------------------------------------------- DesignerCouncil 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 DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil 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 ---------------------------------------------------------------------------------