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US 7,973,334 B2Granted
Localized trigger ESD protection device
AssigneeSofics BVBA
InventorsStefaan Verleye, Geert Wybo, Benjamin Van Camp
Life of this patent
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Abstract
The present invention provides an ESD device to reduce the total triggering current without increasing the overshoot voltage. This is achieved by localizing the triggering current, such that the local current density remains high enough to trigger the ESD device. This localized triggering provides a fast and efficient triggering of the ESD device.
Claims30
An electrostatic discharge (ESD) protection device comprising:
- an anode formed within a first lightly doped region and a cathode formed within a second lightly doped region;
- wherein at least one of the anode and the cathode includes an extension to provide localized current to trigger the device;
- and wherein the extension is formed in only a portion of the at least one of the anode and the cathode.
An electrostatic discharge (ESD) protection device comprising:
- an anode formed within a first lightly doped region and a cathode formed within a second lightly doped region;
- and
- a gate region comprising oxide formed over only a portion of the width axis of the anode or cathode to provide localized current to trigger the device.
An electrostatic discharge (ESD) protection device comprising:
- an anode formed within a first lightly doped region and a cathode formed within a second lightly doped region;
- and
- a third region formed over only a portion of the width axis of the anode or cathode to provide localized current to trigger the device, wherein the third region excludes any type of isolation.
Dependencies are inferred from the claim text.