Gabi,
Check out
[912] Linholm, Loren W., and Plachy, Richard F., "Electrostatic
Gate Protection Using an Arc Gap Device," 11th Annual Proceedings
Reliability Physics. Las Vegas, NV, Apr. 3-5, 1973, pp. 198-202.
[1387] Wallash, Albert J. and Hughbanks, Timothy H.,
"Capacitive Coupling Effects in Spark Gap Devices," Electrical
Overstress/ Electrostatic Discharge Symposium
Proceedings</CITE>, Las Vegas,
NV, Sept. 27-29, 1994, pp. 273-278.
These citations are from a nearly 1500-item bibliography of books,
papers, articles, etc. on electrostatic discharge that I have on my
webpage
http://www.r-e-d-inc.com/esd-anno.htm
Enjoy!
John Barnes Consultant
Robust Electronic Design, Inc.
Lexington, KY
Hoffknecht wrote:
>
> Hi all,
>
> I have seen PCB designs with two triangular shaped copper pads pointed
> towards each other at very close proximity, meant as an air gap discharge
> path for transients. Does anyone have information about such designs,
> whether they work and how well ? At a breakdown voltage for air of 1
> Megavolt per meter, they should theoretically work: 10mil distance would
> have a breakdown voltage of only 254V. Such a PCB design basically comes for
> free, so I was thinking of adding it on top of my already existing series
> impedance - TVS network.
> Thanks in advance for your comments.
>
> Best regards,
> Gabi Hoffknecht
>
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