Hello All, I have a customer whose print notes call for vias to be filled with Hysol 1C per HMS 20-2092 and to soldermask per IPC-SM-840 class "H" using HMS 2389 type II. Does anybody know what "HMS" stands for? I cant seem to find any reference on the web other than Navy ships. LeRoy Hendy DFM Center Sanmina-SCI (408) 557-7877 --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------