Hi Gary,
I have the IPC-6012B and as for:
1. No table or information for the layer to layer registration, I think this is done through the etched annular ring requirements. This will give you the layer to layer registration by measuring the annular ring left after the drilling and plating.
2, 3 & 4. By documentation procurement, if not specified then IPC-2220 series is applied.
Hope this help.
Louis Guérin, C.I.D.+
Conception de Plaquette de Circuit Imprimé | PCB Designer
Lyrtech inc.
* Téléphone - International / Phone - Worldwide: +1-418-877-4644 #242
* Sans frais - Canada & É.-U. / Toll Free -.Canada & USA: +1-888-922-4644 #242
* Téléc. / Fax : + 1-418-877-7710
i Visitez-nous sur internet à / Visit us on the web : www.lyrtech.com
-----Message d'origine-----
De : DesignerCouncil [mailto:[log in to unmask]] De la part de Gary M. Koven
Envoyé : 4 mars 2005 10:45
À : [log in to unmask]
Objet : [DC] IPC-6012 features requirements/tables
I'm looking for, and not finding, several features requirements/tables (by
Class 1,2,3) within IPC-6012A:
1. Layer to layer registration
2. Hole size tolerance
3. Hole location tolerance
4. Pattern feature accuracy
The IPC webpage advertising for IPC-6012B purports to have incorporated many
new requirements therein, including some of the above. That's fine, but I
would like to know if I will find the above tables within IPC-6012B. I
would like to know this before I go buy 6012B, not after.
If these requirements/tables are listed in another IPC standard, please
direct me there.
Our boards are Class 2. One of our clients' assembly houses wishes to
tighten the "Tooling Hole to artwork tolerance" to +/- 0.002 inch which, if
memory serves, seems to be a Class 3 requirement. I need the tables I
listed above in order to address this issue.
TIA and Best Regards,
======================
Gary M. Koven, C.I.D.
Engineering Services Manager
Dynazign, Inc.
806 Tyvola Road, Suite 100
Charlotte, NC 28217
P: 704.405.1234 x210
F: 704.405.1402
http://www.dynazign.com/
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