I get 0.0051nH for that size via.
I will add copper characteristics to the toolkit later so Z can be
calculated.

Ken

http://saturnpcb.com/pcb_toolkit.htm


_____________________________________
Kenneth J. Wood
Saturn PCB Design, Inc
www.saturnpcb.com



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Kelly
Sent: Thursday, December 03, 2009 3:37 PM
To: [log in to unmask]
Subject: Re: [TN] Impedance through a via

Hi Joe,
Characteristic impedance.  Via is a .006 drill on a .012 pad- after plating
approx. .004 . Regards Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Fjelstad
Sent: December-03-09 2:33 PM
To: [log in to unmask]
Subject: Re: [TN] Impedance through a via

Hi Steve, 
 
Are you looking for the electrical or the electronic impact? Current  
carrying or characteristic impedance? Hole size and copper thickness  will
likely 
dominate the former and land dimensions the latter. 
 
Best, 
Joe     
 
 
In a message dated 12/3/2009 10:28:09 A.M. Pacific Standard Time,  
[log in to unmask] writes:

Good  Afternoon,

Can someone please tell me how to calculate the impedance  through a via? 
Build is a flex - ½ oz. copper on both sides of .001 kapton.  Thanks in 
advance. Regards Steve Kelly



Steve Kelly (PLEASE NOTE  NEW E-MAIL ADDRESS)

(416) 750-8433 (work)

(416) 750-0016  (fax)

(416) 577-8433  (cell)




---------------------------------------------------
Technet  Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe,  send a message to [log in to unmask] with following text in
the BODY (NOT the  subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery  of Technet send e-mail to 
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To  receive ONE mailing per day of all the posts: send e-mail to 
[log in to unmask]:  SET Technet Digest
Search the archives of previous posts at:  http://listserv.ipc.org/archives
Please visit IPC web site  http://www.ipc.org/contentpage.asp?Pageid=4.3.16 
for additional information,  or contact Keach Sasamori at [log in to unmask] or 
847-615-7100  ext.2815
-----------------------------------------------------


---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------