Hi Victor! You can purchase the book from the IICIT organization. Here is the link to their webpage and then just look under publications: http://www.iicit.org/index.htm There are 3 other volumes in the set which may be useful too but the Volume 4 Materials has been a very good source of simple, basic plastics and contact surface materials information despite the age of the publication. I picked up the book at a IPC APEX show after Gerry Ginsberg (who was the Volume 4 editor and the IPC-T-50 committee chairman for many years) suggested it as a good reference source. Dave "Victor G. Hernandez" <Victor_G_Hernand To [log in to unmask]> [log in to unmask] Sent by: TechNet cc <[log in to unmask]> Subject Re: [TN] Microcircuit Palladium 03/03/2005 06:51 Lead Finish (Good or Bad)? AM Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to Victor_G_Hernande [log in to unmask] Dave, Where could I purchase this great Connector & interconnection Handbook published by Electronic Connector Study Group you speak about. Victor, -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman Sent: Wednesday, March 02, 2005 6:03 PM To: [log in to unmask] Subject: Re: [TN] Microcircuit Palladium Lead Finish (Good or Bad)? Hi folks! Wow, what a way to named - "the guy who cuts up his water pipes"! Well, its better than Doug's "It depends"! I do have some information that might be helpful - the following info is taken from Volume 4 Materials of the Connectors and Interconnections Handbook published by the Electronic Connector Study Group Inc. (sorry, no ISBN available) which is a really good resource on connector materials. - Pd wears better than Au for an equal plating thickness and can provide an adequate end of life contact - Pd is somewhat less galvanically active toward copper and nickel than corresponding deposits of either Au or rhodium - 60Pd40Ag is recognized as a good contact material for industrial and telecommunications applications - Pd can tarnish due to sulfur contributing sources - Pd can form frictional polymer in sliding contact applications that are exposed to organic vapors. The frictional polymer can increase contact resistance. I would recommend that you talk to the folks at Tyco or the J.M. Ney Company - a Pd finish is being used widely in electronics applications and you just need to confirm that your application/use environment is appropriate. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] Charles Caswell <CharlesC@FESCORP .COM> To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 02/28/2005 06:33 Re: [TN] Microcircuit Palladium AM Lead Finish (Good or Bad)? Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to Charles Caswell <CharlesC@FESCORP .COM> I don't have the spec available but I would think that Palladium finish in a gold socket would be fine. I would not want to solder directly to Palladium however. Maybe Dave ( the guy who cuts up water pipes from his house! ) could give us some insight. -----Original Message----- From: - Bogert [mailto:[log in to unmask]] Sent: Friday, 25 February 2005 5:06 PM To: [log in to unmask] Subject: [TN] Microcircuit Palladium Lead Finish (Good or Bad)? February 25, 2005 MIL-PRF-38535 microcircuit specification is confusing since in one section it identifies that to select a lead finish, include a suffix letter as part of the part number. The available suffix letters are Finish "A", "B", "C":, "D" and "X". "D" is for Palladium. "X" means either "A", "B", or "C" Finish However, Appendix A of the specification indicates that only lead Finishes "A" through "C" (or "X") are allowed. It appears that Finish "D", Palladium finished microcircuit leads are not allowed. Is this true? If so, why the apparent prohibition on Palladium lead finish? The question relates to selecting the lead finish for a microcircuit that is mounted in a socket having Gold-plated socket contacts. Normally, one should specify a Gold-plated microcircuit lead (Finish "C") to mate with the Gold-plated socket contact. However, from a galvanic corrosion standpoint, either Gold or Palladium should be ok. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 1.8e 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 1.8e 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 1.8e 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 1.8e 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 -----------------------------------------------------