Hi Arlene,
The IPC-2221, section 12 is where you'll find most of the current
descriptions. However, they are currently being reviewed and a new standard is in
the pipeline to be released soon. I'm not sure when it's scheduled to be
released, but thought is was going to be by the end of the year. Gary
Ferrari has been working with that committee and may be able to give us an
update. Meanwhile, go ahead and spec out the IPC-2221 for now.
Cherie Litson, CII
In a message dated 11/19/2012 10:18:24 A.M. Pacific Standard Time,
[log in to unmask] writes:
Kelly,
I'm going to let the board house design the coupons as they've already
done the work and have them on file. I was just looking for the standard to
point to in my fab note, if there is one, that defines the coupon.
Something like: Manufacturer to incorporate test coupon per IPC-???? Etc.
Thank you for your input.
Arlene
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Dack.Kelly
Sent: Friday, November 16, 2012 2:53 PM
To: [log in to unmask]
Subject: Re: [DC] Test coupons
Oh -- also, forgot to mention IPC-TM-650 (Test Methods) as a good read on
measuring characteristic impedance, but my (old) copy has nothing to say
about design of test patterns. -- K
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Dack.Kelly
Sent: Friday, November 16, 2012 11:48 AM
To: [log in to unmask]
Subject: Re: [DC] Test coupons
Arlene -- I know that I'm way out of date with this spec, but I'm seeing
test coupon design rules in the old IPC-2141 spec (1996) Physics hasn't
changed much since then, but maybe someone out here can point us to newer
information. Most importantly, you will need to design a pattern that will
match the probes of the equipment that will be doing the testing, with lines
that have the same geometry as the one's you want to control in your design.
If you are not doing your own testing with your own equipment, you might
check with your board supplier who has a TDR machine and is most likely
already putting test patterns on the outside edges of your controlled impedance
design's panels.
Hope this helps -- Kelly
______________________________________________________
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Arlene
Fox
Sent: Friday, November 16, 2012 11:20 AM
To: [log in to unmask]
Subject: [DC] Test coupons
Hi All,
Can someone tell me if there is an IPC standard that calls out the
requirements for an Impedance Test Coupon.
Thanks,
Arlene Fox, CID
Enercon Technologies
[log in to unmask]
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