Extreme ultraviolet light generation apparatus
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United States of America Patent
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Apr 10, 2018
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app pub date -
Apr 6, 2017
filing date -
Nov 20, 2014
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Abstract
An extreme ultraviolet light generation apparatus may be configured to generate extreme ultraviolet light by irradiating a target with a pulse laser beam outputted from a laser apparatus to generate plasma. The extreme ultraviolet light generation apparatus may include a chamber; a target supply device configured to supply a target to a plasma generation region inside the chamber; a target sensor located between the target supply device and the plasma generation region and configured to detect the target passing through a detection region; and a shield cover disposed between the detection region and the target supply device, having a through-hole that allows the target to pass through, and configured to reduce pressure waves that reach the target supply device from the plasma generation region.
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