Ushio Denki Kabushiki Kaisha

Hironobu Yabuta

Taku Sumitomo

Noritaka Ashizawa

Tatsushi Igarashi

Masaki Inoue

Christof Metzmacher

Kyohei Seki

Masaki Yoshioka

Hiroto Sato

Takahiro Shirai

Achim Weber

Rolf Theo Anton Apetz

Gota Niimi

Hermann Giese

Hajime Kikuiri

Nobuaki Miyagawa

A debris mitigation device includes a static foil trap. The static foil trap includes an enclosure section, a plurality of foils, an inlet hole, and a pressure-increasing mechanism. The enclosure section includes an incident opening where light emitted from the light source enters, an emission opening where the light is emitted, and an internal space where the light travels. The foils are fixed in an area of the internal space. The inlet hole is configured to be communicated with the internal space, and allow a transparent gas transparent to the light to flow into the internal space. The pressure-increasing mechanism includes at least one of an incident-side member and an emission-side member disposed at the incident opening and the emission opening, respectively, in a manner that opening areas thereof are reduced without blocking a traveling of the light, and increases a pressure of the internal space.

Debris mitigation device and light source apparatus including the same

An extreme ultraviolet light source apparatus includes a light source part for generating a plasma that emits extreme ultraviolet light with use of excitation of a raw material for emitting extreme ultraviolet light; a storage vessel for storing a melt of a waste material including the raw material and a melt of particles of debris that are emitted from the plasma; a receiving plate member having a receiving surface; and a corrosion-resistant member disposed on the receiving surface of the receiving plate member, the corrosion-resistant member being more corrosion-resistant to the melt of the waste material and the melt of the debris than the receiving plate member, the corrosion-resistant member receiving the melt of the waste material and the melt of the debris and guiding the melt of the waste material and the melt of the debris into the storage vessel.

Extreme ultraviolet light source device and protection method for receiving plate member

A foil trap that captures debris released from a plasma includes a hub structure, a plurality of foils, and a shield member. The hub structure has a circumferential surface portion and a front surface portion facing the plasma. The foils are arranged radially around the hub structure and are supported by brazing on the circumferential surface portion. The shield member is disposed on the front surface portion, has a circumferential edge portion that shields the circumferential surface portion from the plasma, and forms a thermal resistance section between the shield member and the hub structure.

Foil trap and light source apparatus including the same

An extreme ultraviolet light (EUV) source apparatus includes a light source part for generating a plasma that emits EUV light; a first vacuum housing in which the light source part is located; a second vacuum housing arranged between the first vacuum housing and a utilizing apparatus in which the EUV light is utilized; and a debris trap located inside the second vacuum housing for deflecting debris particles emitted from the plasma, whereby the debris particles do not ingress into the utilizing apparatus. Between the first and second vacuum housings, there is provided a window through which the EUV light emitted from the light source part passes from the first vacuum housing to the second vacuum housing. A wall of the second vacuum housing has a through-hole and a window that is configured to allow the EUV light to pass from the second vacuum housing to the utilizing apparatus.

Extreme ultraviolet light source device

Disclosed herein a rotational type foil trap that is capable of avoiding the transmission rate of the EUV light to be lowered even when the EUV light source operates with the high input power and also suppressing the temperature increase of the foil to attain a sufficient life duration. In the rotational type foil trap, one end of each of foils is inserted into each of a plurality of grooves provided on a side face of a center support, and the center support and the each of the foils are fixed together by brazing.

Foil trap and light source device using such foil trap

Disclosed herein a light source apparatus that is capable of suppressing a light transmission rate of a debris trap to be lowered and a reflection rate in a light condenser mirror to be lowered. In the light source apparatus, a shielding member is provided having an aperture is provided in front of a stationary type foil trap to limit a solid angle of light emitted from a high temperature plasma. Furthermore, the stationary type foil trap is provided with a driving mechanism to allow the foil trap to be revolved such that an adhesion part of the debris of the foil trap is deviated from a position of the foil trap facing the aperture.

Light source apparatus

An extreme ultraviolet radiation source device comprises a vessel; an electric discharge section including a pair of main discharge electrodes; a material supply unit which supplies an extreme ultraviolet radiating species to the electric discharge section; a high voltage generating section which impress high voltage to the pair of main discharge electrodes; a grazing incidence type collector unit which condenses extreme ultraviolet light emitted from high temperature plasma; a light extraction section formed in the vessel; a gas supply unit which supplies gas into the vessel from a light emitting side of the collector unit, an exhaust unit which discharges the gas from a light incidence side of the collector unit; wherein a flow path through which the gas supplied from the light emitting side of the collector unit passes is formed only inside the collector unit.

Extreme ultraviolet radiation source device

An extreme UV radiation producing device in which adhesion of solid tin in the vacuum pump of an evacuation device is restricted, so that the maintenance period and the replacement period of the pump is prolonged is achieved by the provision of a treatment unit between a radiation source chamber and the evacuation device. The treatment device has a hydrogen radical producing part in which tin and/or a tin compound in the evacuated gas from the radiation source chamber is/are made into a tin hydride; and a heat treatment part in which the tin hydride is thermally decomposed and in which the tin produced liquefied and separated from the evacuated gas. The liquid tin is fed into a collecting/storage vessel and the evacuated gas from which the tin and/or a tin compound has been removed fed to the evacuation device.

Device for producing extreme UV radiation

To suppress the adherence of debris as a result of a radiating fuel, such as tin or the like, within a vessel for forming high density and high temperature plasma of an extreme UV radiation source device, and to eliminate deposited tin and/or tin compounds with high efficiency, hydrogen radical producing parts are provided in the vessel; and hydrogen radicals are produced in the vessel so that deposition of tin and/or a tin compound is suppressed in the area with a low temperature of the device, such as a focusing mirror or the like, and the deposited tin and/or tin compound is eliminated.

Growing community of inventors

Himeji, Japan

Hironobu Yabuta