Sorry the last mail copied a bunch of hyperlinks, Should read: Werner, Molex are a large manufacturer, here are the materials: Physical Housing Material LCP Liquid Crystal Polymer, Glass-filled Color White Flammability UL 94V-0 Contact Phosphor Bronze (CuSn) Plating Contact Gold (Au) Plating Tail Tin (Sn), Lead-free Under Plating Nickel (Ni) Durability [mating cycles] min. 30 cycles Temperature Range -55°C to +85°C Mechanical Contact Retention Force-min. (per circuit) 3.92N (0.88 lb) Designed In Millimeters Mounted Height 4.00mm (.157") Mounted Width 30.40mm (1.197") Here is a link to the page in their catalog: http://tinyurl.com/hc3hu There are links on the left of the page for tech assistance etc which you may need. Have a great weekend Werner, Kind regards, John _____ From: [log in to unmask] [mailto:[log in to unmask]] Sent: Friday, September 29, 2006 5:11 PM To: [log in to unmask]; [log in to unmask] Subject: Re: [TN] Memory chip sockets Hi john, The sockets are to install/snap-in memory chips into laptop computers. They are 144 I/O with one inside row and one outside row of gullwing-shaped leads. What is of particular interest is the material used for the socket body (CTE, Tg) and what kind of compliancy these leads have. Werner --------------------------------------------------- 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 -----------------------------------------------------