[SI-LIST] Re: On the effect of solder mask on Zo
- From: "Abe Riazi" <ariazi@xxxxxxxxxxxxxxx>
- To: "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 13 Feb 2004 10:14:21 -0800
Dear Charles and others
In a column by Dr. Eric Bogatin ( "When Accuracy Counts" Printed Circuit
Design & Manufacture", May 2003, P. 36 ), it is stated that Zo decreases by
about one Ohm per one mil of soldermask thickness.
Regards,
Abe Riazi
ServerWorks
-----Original Message-----
From: Grasso, Charles [SMTP:Charles.Grasso@xxxxxxxxxxxx]
Sent: Friday, February 13, 2004 7:49 AM
To: 'si-list@xxxxxxxxxxxxx'
Subject: [SI-LIST] On the effect of solder mask on Zo
Its about 3ohms per mil. The upper limit is 7mils at this point the
soldermask is essentially infinite. Quite significant I would think.
Source : Verifying the accuracy of 2S solvers on Zo Calculation - Dr Eric
Bogatin.
Slides available from the GigaTest website : http://www.gigatest.com
<http://www.gigatest.com/>
Best Regards
Charles Grasso
Senior Compliance Engineer
Echostar Communications Corp.
Tel: 303-706-5467
Fax: 303-799-6222
Cell: 303-204-2974
Email: charles.grasso@xxxxxxxxxxxx; <mailto:charles.grasso@xxxxxxxxxxxx;
%20>
Email Alternate: chasgrasso@xxxxxxxx <mailto:chasgrasso@xxxxxxxx>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
