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US 6,586,267 B2Granted
Transient fuse for charge-induced damage detection
AssigneeTexas Instruments Incorporated
InventorSrikanth Krishnan
Life of this patent
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Abstract
A transient fuse (102) and antenna (110) for detecting charge-induced plasma damage in a device (112). When the transient fuse (102) is placed between the antenna (110) and the device (112), only charge-induced damage during a metal clear portion of an etch occurs in device (112). When the transient fuse (102) is placed between ground and both the device (112) and the antenna (110), charge-induced damage occurring during an overetch portion of the etch can be detected in the device (112).
Claims9
A method of detecting plasma damage, comprising the steps of:
- forming at least one device in a semiconductor body;
- forming a first dielectric layer over said semiconductor body;
- forming a first conductive layer over said dielectric;
- patterning and etching said first conductive layer using a plasma reactor to form a plurality of interconnect lines, at least one transient fuse having a plurality of closely spaced structures, and at least one antenna, said at least one transient fuse coupled to both said at least one device and said at least one antenna;
- and
- evaluating said device for charge-induced damage.
3 more elements
Dependencies are inferred from the claim text.