George's point is well taken. Keep in mind too, inspector calibrtion can be significant. Inspectors that are used to looking a silver colored lands will not like "exposed copper" on the land patterns. One additional commment, all immersion tins are not the same, immersion silver might be a bit more robust than immersion tin. Guy Ramsey American Competitiveness Institute Senior Lab Technician / Instructor 610 362-1200 ext 107 -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Michael Forrester Sent: Wednesday, January 24, 2001 10:51 AM To: [log in to unmask] Subject: [TN] Silver vs OSP surface finish What are the advantages of using Silver (Alpha level) Vs OSP (Entek) as a surface finish? Since Alpha level has an OSP over the silver why bother with the silver? Wouldn't less interfaces between the component and trace be better? Thank you. Best Regards, Michael Forrester LeCroy Corp. ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------