# US 10,455,679 B2 · Extreme ultraviolet light generation device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,679 B2 - Document ID: US10455679B2 - Status: Granted - Kind: B2 - Application number: 15/836,877 - Filed: 2017-12-10 - Published: 2018-04-12 - Granted: 2019-10-22 - Earliest claimed: 2015-07-30 - Assignees: Gigaphoton Inc. - Applicants: Gigaphoton Inc. - Inventors: Takashi Saito; Yoshifumi Ueno; Georg Soumagne - Web page: https://patentgrep.com/patent/US10455679B2 ## CPC - H05G 2/0027: {Arrangements for controlling the supply; Arrangements for measurements} - H05G 2/009: {Auxiliary arrangements not involved in the plasma generation} - H05G: X-RAY TECHNIQUE (investigating or analysing materials by the use of X-rays G01N23/00; apparatus for X-ray photography G03B42/02; X-ray tubes H01J35/00; TV systems having X-ray input H04N5/321) ## Abstract The extreme ultraviolet light generation device includes a chamber having a first through-hole that allows a pulse laser beam to enter the chamber, a target supply unit held by the chamber and configured to output a target toward a predetermined region in the chamber, a shield member surrounding the predetermined region in the chamber and having a target path that allows the target outputted from the target supply unit to pass toward the predetermined region, and a tubular member surrounding at least a part of an upstream portion of the trajectory of the target outputted from the target supply unit toward the predetermined region, the upstream portion being upstream from the target path of the shield member. ## Claims ### Claim 1 An extreme ultraviolet light generation device comprising: a chamber having a first through-hole that allows a pulse laser beam to enter the chamber; a target supply unit held by the chamber and configured to output a droplet target toward a predetermined region in the chamber; a collector mirror configured to reflect and collect the extreme ultraviolet light generated in the predetermined region; a shield member surrounding the predetermined region in the chamber, the shield member surrounding an optical path of the extreme ultraviolet light reflected by the collector mirror and having a target path that allows the droplet target outputted from the target supply unit to pass toward the predetermined region; and a tubular member surrounding at least a part of an upstream portion of the trajectory of the droplet target outputted from the target supply unit toward the predetermined region, the upstream portion being upstream from the target path of the shield member. ### Claim 2 (depends on 1) The extreme ultraviolet light generation device according to claim 1, further comprising: a gas supply device configured to supply gas to a space inside the chamber and outside the shield member. ### Claim 3 (depends on 1) The extreme ultraviolet light generation device according to claim 1, further comprising: a gas supply device configured to supply gas to a space inside the tubular member. ### Claim 4 (depends on 1) The extreme ultraviolet light generation device according to claim 1, wherein the tubular member is fixed to the target supply unit with a gap between the tubular member and the shield member. ### Claim 5 (depends on 1) The extreme ultraviolet light generation device according to claim 1, wherein the tubular member is provided at outside of the optical path of the extreme ultraviolet light reflected by the collector mirror. ### Claim 6 (depends on 1) The extreme ultraviolet light generation device according to claim 1, wherein the tubular member has a cylindrical shape having a circular section perpendicular to the trajectory of the droplet target outputted from the target supply unit. ### Claim 7 (depends on 1) The extreme ultraviolet light generation device according to claim 1, wherein the tubular member has a quadrangle piped shape having a quadrangle section perpendicular to the trajectory of the droplet target outputted from the target supply unit. ### Claim 8 An extreme ultraviolet light generation device comprising: a chamber having a first through-hole that allows a pulse laser beam to enter the chamber; a target supply unit held by the chamber and configured to output a droplet target toward a predetermined region in the chamber; a shield member surrounding the predetermined region in the chamber and having a target path that allows the droplet target outputted from the target supply unit to pass toward the predetermined region; and a tubular member surrounding at least a part of an upstream portion of the trajectory of the droplet target outputted from the target supply unit toward the predetermined region, the upstream portion being upstream from the target path of the shield member, the tubular member being fixed to the chamber with a gap between the tubular member and the shield member. ### Claim 9 (depends on 8) The extreme ultraviolet light generation device according to claim 8, wherein the tubular member penetrates a through-hole of the shield member, the through-hole constituting the target path. ### Claim 10 (depends on 8) The extreme ultraviolet light generation device according to claim 8, wherein the tubular member has a flange portion located at the outside of the chamber. ### Claim 11 An extreme ultraviolet light generation device comprising: a chamber having a first through-hole that allows a pulse laser beam to enter the chamber; a target supply unit held by the chamber and configured to output a droplet target toward a predetermined region in the chamber; a shield member surrounding the predetermined region in the chamber and having a target path that allows the droplet target outputted from the target supply unit to pass toward the predetermined region; a tubular member surrounding at least a part of an upstream portion of the trajectory of the droplet target outputted from the target supply unit toward the predetermined region, the upstream portion being upstream from the target path of the shield member; and a trajectory adjusting mechanism configured to adjust a trajectory of the droplet target in a first direction substantially perpendicular to the trajectory and in a second direction substantially perpendicular to both of the trajectory and the first direction, wherein the tubular member has a rectangular section, the rectangular section having first and third edges substantially parallel to the first direction and second and fourth edges substantially parallel to the second direction.