Hello T'Netters,
I've not received a single reply from the last posting
of this question, so I'd like to repeat:
What document defines a low aspect via?
Is there a numerical cut-off between a low aspect via
and other vias?  Certainly, in the 6012A document, acceptable
minimum average copper thickness and absolute minimum
copper thickness are defined for typical vias and
low aspect vias. Is 3:1 a low aspect via? How about 4:1?
Or 5:1?
Any help out there?
Mike Simms
Trace Laboratories - Central

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