Steve, you're right that 610 doesn't address this issue. We use this type of device quite often, and to operate properly (RF stuff, you know...) the entire body of the component must be soldered down, with a nice fillet all around. This requirement should be documented on the drawing, however. Thanks, Jim M. -----Original Message----- From: Stephen R. Gregory [SMTP:[log in to unmask]] Sent: Tuesday, August 29, 2000 10:21 AM To: [log in to unmask] Subject: [TN] Castellated Hybrid soldering... Mornin' all!! Notice I didn't say "Good" mornin'...mine is started off as usual...SNAFU. We build this RF board here that has what's called a 90° Hybrid Coupler. It's from a company called Anaren and it's trade named a ZingerŪ. Basically it's a surface mount metal bodied ceramic filled part that gets its body soldered to one big via filled pad that connects to a ground plane, and then there are four castellations at each corner (which are the RF pads of the device) that are soldered to very wide traces. Well, we've been told that we're getting boards back because the soldering doesn't meet -610 class 2, and that there should be a continuous fillet completely around the portion of the body of the part that is connecting to the ground plane. I say there isn't anything in the -610 that applies to that. I've got some pictures up so you can see what I mean. Go to: http://www.driveway.com/share?sid=4eced0a4.94f42&name=Pictures There's a picture called Pasteprint.jpg that shows the footprint on the board, you'll see the big grounding pad in the center, and the four corner pads where the RF pads of the device connect to. The other picture is called bubblyplating.jpg and is a close-up of one of the castellations that have this bubbly looking plating on them...anybody ever seen that before? The other picture is called exposedcopper.jpg and is a side view of the device that shows exposed copper along the edges of the device...and that's where they say we don't meet IPC spec's, they say we should have a continuous fillet all along those edges. I don't have a problem meeting their spec's if that's what's required for the board, but I do have a problem when they say it doesn't meet IPC spec's, because this is such a weird part and weird footprint, I don't believe the -610 addresses it. -Steve Gregory- ############################################################## 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 ##############################################################