Werner is there somewhere that one can read your white papers?



-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Werner Engelmaier
Sent: Friday, April 27, 2007 12:49 PM
To: [log in to unmask]
Subject: Re: [TN] "plated shut vias"


Hi Frank,
Your approach is almost identical to what I suggest in my 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."
For 'Drilled Hole Size' the drill diameters are specified at 30 mils and 
below and given a refderence values above that; the 'Finished Hole Size' is given 
as a reference for the smaller holes and specified with a =/- 0.003 mils 
tolerance for the larger holes.
For all holes a minimum copper plating thickness is mandated.

Werner



**************************************
 See what's free at http://www.aol.com.

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

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