Single sided board, for consumer products?  6mil drill?

Shawn Upton, KB1CKT
Test Engineer
Allegro MicroSystems, Inc
[log in to unmask]
603.626.2429/fax: 603.641.5336

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Fabien Guizelin
Sent: Tuesday, August 24, 2010 10:04 AM
To: [log in to unmask]
Subject: [TN] Annular ring on via

Could you clarify the annular ring requirement for vias?

I have a board with 0.150mm vias which has some non-centered via holes.

What are the acceptance criteria ?
The vias are not plated.

Thansk,
Fabien


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