guard ring

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guard ring

[′gärd ‚riŋ]
(electricity)
A ring-shaped auxiliary electrode surrounding one of the plates of a parallel-plate capacitor to reduce edge effects.
(electronics)
A ring-shaped auxiliary electrode used in an electron tube or other device to modify the electric field or reduce insulator leakage; in a counter tube or ionization chamber a guard ring may also serve to define the sensitive volume.
(thermodynamics)
A device used in heat flow experiments to ensure an even distribution of heat, consisting of a ring that surrounds the specimen and is made of a similar material.
References in periodicals archive ?
Layout solution enhanced for matching device placement, guard ring creation and dummy insertion features to speed creation of analog layout with FinFET devices
Laker support for middle end-of-line (MEOL) layers includes contactless connectivity, unidirectional layer rules and enhancements to support 16-nm guard rings.
Guard rings and via can be set-up through L-Edit's user interface or imported from a Virtuoso(R) technology file.
Laker support for MEOL layers includes contactless connectivity, unidirectional layer rules and enhancements to support 16-nm guard rings.
The technology allows for integration of medium- and high-resistivity polysilicon resistors, medium- and high-voltage floating capacitors and deep, N+ doped guard rings.
New capabilities include device grouping with programmable guard rings, highly matched precision structures, multiple symmetry lines, and proximity matching.
Guard rings are typically used to reduce substrate coupling but overuse can mean wasted area and even an increase in the substrate noise observed by analog devices.
All General Semiconductor Schottky rectifiers have ion-implanted guard rings for reverse energy protection.