Abstract:
A system includes a first actuation module coupled to a first actuatable apparatus of m optical source, she first actuatable apparatus being altered by the first actuation module to adjust the spectral feature of the pulsed light beam a second actuation module coupled to a second actuatable apparatus of the optical source, the second actuatable apparatus being altered by the second actuation module to adjust the spectral feature of the pulsed light beam; arid a control system configured to receive an indication regarding the operating state of the first actuatab!e apparatus; and send a signal to the second actuation module to adjust the spectral feature of the pulsed light beam to either: prevent the first actuatable apparatus from saturating based on the operating state of the first actuatable apparatus, or the first actuatable apparatus if the first actuatable apparatus is saturated.
Abstract:
An extreme ultraviolet light system includes an optical amplifier system and a catalytic conversion system. Each optical amplifier of the optical amplifier system includes a gain medium in the form of a gas mixture that produces an amplified light beam. The optical amplifier system includes a fluid input and a fluid output through which the gas mixture flows. The catalytic conversion system is fluidly connected to the fluid output of the optical amplifier system and to the fluid input of the optical amplifier system. The catalytic conversion system includes a catalytic converter that includes a housing; a substrate within the housing including openings through which the gas mixture can flow; and a catalyst applied as a coating to the interior surfaces of the openings of the substrate, the catalyst including particles of metal. The particles of metal can be nanoparticles of precious metal.
Abstract:
Изобретение относится к области спектроскопии, отличающийся тем, что спектроскопируют объекты с помощью пучка лучей от источника излучения со стабилизированной частотой; используют результат сканирования спектроскопируемого объекта для модуляции отраженного пучка лучей по параметру поляризации с получением модулированного широкополосного электромагнитного излучения (мШЭИ). Система для реализации способа состоит из следующих последовательно установленных на единой оптической оси компонентов: источник стабилизированного по частоте излучения; импульсный источник питания; объект спектроскопии.
Abstract:
A high power narrow band, high repetition rate laser light source optical improvement apparatus and methods are disclosed with a fast angularly positionable mirror having a mirror mounting frame, a reflective optic with a coefficient different from that of the mounting frame, at least one flexure mount framed in the mounting frame that is flexible having flexure arm attached the flexture to the mounting frame. The apparatus may include a flexure force mechanism having an elongated rod. The force mechanism may prestress the flexure. The mirror maybe a grating which includes a substrate with metallic layer formed on the substrate, and a protective coating made of silica formed on the reflective metallic layer. The grating maybe actively tuned using an electro- or magneto- sensitive element. Oxides of the metal in the reflective layer may be removed by a hydrogen purge system exposed to deep ultraviolet radiation.
Abstract:
The present invention provides an excimer laser capable of producing a high quality pulsed laser beam at pulse rates of about 4,000 Hz at pulse energies of about 5mJ or greater. A preferred embodiments is an ArF excimer laser specifically designed as a light source for integrated circuit lithography. An improved wavemeter with special software monitors output beam parameters and controls a very fast PZT driven tuning mirror and the pulse power charging voltage to maintain wavelength and pulse energy within desired limits. In a preferred embodiment two fan motors drive a single tangential fan which provides sufficient gas flow to clear discharge debris from the discharge region during the approximately 0.25 milliseconds between pulses.
Abstract:
A high repetition rate compact modular gas discharge ultraviolet laser (6) is use as a light source for very rapid inspections of wafers in an IC fabrication process. It is also useful for reticle writing at very rapid rates. A preferred embodiment operates at pulse repetition rates of 1000 to 4000 HZ and is designed for around-the-clock production line operation. A pulse control unit is also included in the preferred embodiment, which controls the timing of pulses to an accuracy of less than four nanoseconds. Preferred embodiments can be configured to operate with a KrF, ArF or F*sub*2 gas mixtures, where each with an appropriate buffer gas can produce 248 nm, 197 nm or 157 nm ultraviolet light pulses.
Abstract translation:高重复率紧凑型模块化气体放电紫外线激光器(6)被用作在IC制造工艺中非常快速地检查晶片的光源。 它也以非常快的速度对掩模版书写有用。 优选实施例以1000至4000HZ的脉冲重复率操作,并被设计用于全天候的生产线操作。 脉冲控制单元还包括在优选实施例中,其将脉冲的定时控制到小于4纳秒的精度。 优选的实施方案可以被配置成用KrF,ArF或F * sub * 2气体混合物进行操作,其中每个具有合适的缓冲气体可以产生248nm,197nm或157nm的紫外光脉冲。
Abstract:
In order to maintain a constant laser output pulse power in a RF-energized, sealed-off, diffusion cooled, pulsed, CO2 gas-discharge laser (160), each laser output pulse is generated by train or burst of shorter RF pulses. When the time between laser output pulses (176) becomes short enough that the power in one pulse would be reduced by gas-discharge heating effects of a previous pulse, power in the RF pulse trains (164) is varied by varying the duration or duty cycle of pulses in the bursts, thereby keeping output-pulse power in the laser output pulses constant. RF pulses in any burst can have a different duration for tailoring the temporal shape of a corresponding laser-output pulse.