Please help a simple EE.
From bare printed boards we are receiving nano-identation (hardness) values for hard (I assume Cobalt) gold in the 3000 MPa range. Quick and dirty conversion yields ~300 Knoop/Vickers; right?
That sounds reasonable.
BUT, we're getting 6500 MPA for the ENIG. Is this even possible? Does anyone know if it is an indication of poor IAu? Or maybe a poor nano-indentation tester?
Thanks,
Chris
---------------------------------------------------
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
-----------------------------------------------------