Hi Genny,
Technically, 'flash gold' means a a thin layer of Au plated either by an 
electrolytic or electroless plating process. In eihter case, the Au thickness will 
depend on the plating time and other plating parameters. More typically, Au 
is applied by an immersion process which is self-limiting. This is important to 
avoid thicker Au layers that can lead to gold-embrittlement.
You may be interested in a White Paper "Recommendations for PCB FAB Notes and 
Specifications in Printed Circuit Board Drawings for SnPb and Lead-Free 
Soldering Assemblies, the Qualification of PCB Shops and Activities to Assure 
Continued Quality" that I wrote.

Werner



**************
Start the year off right.  Easy ways to stay in shape.
     
http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489

---------------------------------------------------
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
-----------------------------------------------------