Stella you can't have coplanarity problem with a three legged device. So your problem lies in other areas such as geometry of pad, solder volume, solderability, placement pressures and so on. Mike ----- Original Message ----- From: Stella Neyman <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, March 08, 2000 4:19 PM Subject: [TN] Coplanarity > Dear Technetts, > I have one custom design three leg SMT component. Two side leads (which are > pretty massive and one middle center post). These leads are designed to > create butt joints. > Drawing specifies 0.004" coplanarity for all three leads. We are using > 0.007" stencil. > Now $1,000 question. I am using my life line and asking audience to help me. > It seems, that center post doesn't create good solder joint. There are > cases, when it seats only 0.001" deep in the solder and may break easily. > I cannot use more than 0.007" stencil due to other component packages. I > don't want to touch up each solder joint after reflow. > What would you recommend? Please advise. > Sincerely, > Stella > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## > ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################