[log in to unmask]">
Gary,
Thanks for
the reply. But this brings up one
more question. Should the ground
layer represent both connections and non-connections at the same time? If so, what is the best way to handle
this? Should every other hole be “staggered”
so that one is a connection and one is a non-connection?
Thanks,
Robert Zielfelder
Tooling Systems Engineer
Tyco Electronics
Printed Circuit Group - Stafford
-----Original
Message-----
From: TechNet
[mailto:[log in to unmask]]On Behalf Of Gary
Ferrari
Sent: Friday, November 07, 2003
5:22 PM
To: [log in to unmask]
Subject: Re: [TN] IPC-2221 Rev A
Coupon Design
Robert,
The coupons are to
depict the design. So if you have plated through holes that are connected to an
internal plane, the coupon should also have that pad stack connected on the
appropriate layer. If you are making it with a thermal connection then the same
type and sized connection should be made in the coupon. If you have plane
connections that are close to each other than the coupon should use
adjacent pad stacks connected to the internal planes. The purpose of the coupon
is to represent the design as closely as possible.
Regards,
Gary Ferrari
Ferrari Technical Services
860-350-9300