Information determining apparatus and method

An apparatus for determining information relating to at least one target alignment mark in a semiconductor device substrate. The target alignment mark is initially at least partially obscured by an opaque carbon or metal layer on the substrate. The apparatus includes an energy delivery system config...

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Bibliographische Detailangaben
Hauptverfasser:	Gao, An, Peterson, Brennan, Polyakov, Alexey Olegovich, Nikipelov, Andrey Alexandrovich, Lalbahadoersing, Sanjaysingh
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED THEREFOR BASIC ELECTRIC ELEMENTS CINEMATOGRAPHY ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROGRAPHY HOLOGRAPHY MATERIALS THEREFOR MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS SEMICONDUCTOR DEVICES TESTING
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Beschreibung
Zusammenfassung:	An apparatus for determining information relating to at least one target alignment mark in a semiconductor device substrate. The target alignment mark is initially at least partially obscured by an opaque carbon or metal layer on the substrate. The apparatus includes an energy delivery system configured to emit a laser beam for modifying at least one portion of the opaque layer to cause a phase change and/or chemical change in the at least one portion that increases the transparency of the portion. An optical signal can propagate through the modified portion to determine information relating to the target alignment mark.