Hi ryu, I hope this will be of some guidence for you. For microstrip tracks (single transmission line on the outer surface of the substrate with a ground plane on the reverse side) at microwave frequencies I have always used the following rule of thumb; NOTHING CLOSER THAN 3 x TRACK WIDTH Regards, Barry Bates > -----Original Message----- > From: ryu [SMTP:[log in to unmask]] > Sent: 24 February 1999 16:19 > To: [log in to unmask] > Subject: [TN] electrical clearance > > *** WARNING *** > > This mail has originated outside your organization, > either from an external partner or the Global Internet. > Keep this in mind if you answer this message. > > > I saw the term in the IPC-610. I think it has something to do > with the > design of a product for cross talk elimination. But can > someone tell me > if there is a minimal or maximum requirement for the distance, > is there > any number a designer needs to follow? if the answer is no, > then how the > designer comes up with the number ? Thanks. > > ############################################################### > # > TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line > Services" section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] > or 847-509-9700 ext.312 > ############################################################### > # ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################