http://rf-shielding.com/specs.html -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan Sent: Friday, May 11, 2007 3:32 PM To: [log in to unmask] Subject: Re: [TN] RF fences, oldering Thanks Richard! Can you elaborate a bit on the mechanical clip and the snap-and-twist? I would certainly get rid of the soldered fences if the RF engineer would agree and I would certainly like to show him the alternates. Steve G already mentioned http://www.autosplice.com/catalog/Page_21-22.PDF and I suppose this is the mechanical clip. Do you have anything else? Snap-and-twist? Best regards, Ioan -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Stadem, Richard D. Sent: Friday, May 11, 2007 4:18 PM To: [log in to unmask] Subject: Re: [TN] RF fences, oldering You can probably use tin-plated steel for the fence, but you may not want to. The tin can certainly be plated directly to the steel, but it would have to be of such thickness that there would be no risk of complete dissolution into the solder, else you have nothing to solder to. I am not sure if this is practical or possible. I am assuming you want a wet-joint connection (fully-soldered) along the ground plane on the board, not a mechanical clip or snap-and-twist. Secondly, Kester recommends against using tin-plated steel or brass for shielding fences. Tin-plated steel is plated at the mill and then after the fences are cut out you have a lot of exposed edges that corrode quickly. You need slightly higher temperatures to solder to tin-plated steel, and when you already have a high-mass steel fence the soldering becomes so difficult that after repeated attempts there is no more tin, and guess what happens then? I would use a .16 micron nickel barrier covered with Sn97.6Cu2.4 if I had to use steel fences. I personally prefer nickel-plated brass. Have the fences cut first and then nickel plated to cover all exposed basis metal. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan Sent: Friday, May 11, 2007 12:02 PM To: [log in to unmask] Subject: [TN] RF fences, oldering Hi everybody, since I had no answer to my question regarding the required thickness of the Cu layer on top of a steel fence, I try to reformulate. Can a fence be Sn plated steel only, with no Cu or Ni in between? Would this solder, since Fe is practically insoluble in Sn, so there will be no IMC? Thanks, Ioan --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------