[SI-LIST] Re: copper thickness of a ref plane
- From: "Peterson, James F (FL51)" <james.f.peterson@xxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 21 Jun 2001 08:17:35 -0400
Michael,
the driver for moving to 1/2 oz. copper is clearance through the pin fields
of the connectors. i have to stay 12 mils away from the pads of a pci
connector on a ground plane if the plane is 1 oz. - if it's 1/2 oz., then i
only have to stay 8 mils away. this allows more copper through the pin
fields on my ref planes.
regards,
Jim
-----Original Message-----
From: Greim, Michael [mailto:mgreim@xxxxxxxxxxxx]
Sent: Wednesday, June 20, 2001 4:59 PM
To: 'si-list@xxxxxxxxxxxxx'
Subject: [SI-LIST] Re: copper thickness of a ref plane
Make sure that the ampacity of a half ounce plane
is adequate for your needs. What is driving your
decision to head in this direction? There may be
a better alternative.
Best Regards,
Michael C. Greim Sonus Networks
mgreim@xxxxxxxxxxxx 978-589-8336
Making the world safe for digital signals everywhere
And all this science I don't understand
It's just my job six days a week
The time is gone. The email's over
Thought I'd something more to say......
-----Original Message-----
From: Peterson, James F (FL51) [mailto:james.f.peterson@xxxxxxxxxxxxx]
Sent: Wednesday, June 20, 2001 4:31 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] copper thickness of a ref plane
Because of physical limitations, I am considering reducing all of the ref
planes on a design to 1/2 oz. copper (was 1 oz. copper). The board level
logic is 3.3V CMOS. Does anybody see any problems with doing this?
thanks,
Jim
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