I'm creating instructions for design engineers, purchasers and operators about seamwelding MCM packages. About AlSiC ones, electroless Nickel is preferred by experts around. However, I mean electrolytic Nickel minimum 5um is better. I have tried Sulfamate halfbright on both lid and package. Lids are typically 0.5 mm thick with 12% Si added. However, I've no recommendations for wheel angle.Anyone who got experience? 5, 10, 15 degrees or what? Machine makers have nothing on AlSiC. Inge --------------------------------------------------- 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 -----------------------------------------------------