摘要:
An excimer or molecular fluorine laser system a wavefront compensating optic within its resonator for adjusting the curvature of the wavefront of the beam for compensating wavefront distortions and thereby enhancing the spectral purity of the beam. The wavefront compensating optic may be a plate, such as a null lens. One or both surfaces of the null lens may be adjustable and/or have an adjustable curvature for controlling the wavefront distortion compensation. A multi-compartment enclosure may be included having at least one optical component of the line-narrowing unit within each compartment. An atmosphere within at least one compartment is preferably controlled for controlling the spectral purity of the beam by controlling an amount of wavefront distortion compensation. The wavefront compensating optic may be sealably disposed between adjacent compartments.
摘要:
A F2-laser includes a discharge chamber filled with a gas mixture including molecular fluorine for generating a spectral emission in a wavelength range between 157 nm and 158 nm including a primary line and a secondary line, multiple electrodes coupled with a power supply circuit for producing a pulsed discharge to energize the molecular fluorine, a resonator including the discharge chamber and an interferometric device for generating a laser beam having a bandwidth of less than 1 pm, and a wavelength monitor coupled in a feedback loop with a processor for monitoring a spectral distribution of the laser beam. The processor controls an interferometric spectrum of the interferometric device based on the monitored spectral distribution such that sidebands within the spectral distribution are substantially minimized.
摘要:
A gas discharge laser system for generating a laser beam, such as an excimer or molecular fluorine laser system, includes a laser resonator with an optical element for making wavefront corrections such as an adaptable optical element, a phase conjugating mirror, or a retroreflector array. The resonator preferably also has one or more line-narrowing optical elements for narrowing the bandwidth of the laser beam. One of the resonator reflectors or a transmissive or reflective intracavity optical element of the laser may include the adaptable optical element, phase conjugating mirror or retroreflector plate. A beam expander may be disposed before the adaptable optical element, phase conjugating mirror or retroreflector array for increasing the radius of curvature of the wavefront of the laser beam. A detection and control system including a processor and a detector may be used for controlling the contour of the wavefront correcting optical element in a feedback loop.
摘要:
An electric terminal module includes a plurality of electric contact elements configured to connect to electric conductors and a housing including an opening in at least one side wall thereof. A printed circuit board is disposed in the housing. The printed circuit board includes a circuit arrangement having a plurality of electric components configured to perform a specific function and a mount. An adjusting device is operable to change at least one electric characteristic quantity of the circuit arrangement. The adjusting device is mounted directly onto the printed circuit board on the mount and is operable from outside the housing through the opening so as to swivel or turn.
摘要:
The invention relates to a method and an apparatus for generating EUV radiation from a gas discharge plasma. The object of the invention, to generate EUV radiation from a gas discharge plasma by with is optimized conversion efficiency of the EUV emission while locally limiting the electric discharge channel, is met in that a channel-generating beam of pulsed high-energy radiation is supplied in at least two partial beams which are focused in a pulse-synchronized manner into a superposition region along a spacing axis between the electrodes, and an electrically conductive discharge channel is generated along the superposition region due to an ionization at least of a buffer gas present in the discharge space, wherein the pulsed high-energy radiation of the channel-generating beam is triggered in such a way that the discharge channel is generated before a discharge current pulse has reached its maximum value.
摘要:
The invention is directed to an arrangement for the generation of short-wavelength radiation based on a hot plasma generated by gas discharge and to a method for the production of coolant-carrying electrode housings. It is the object of the invention to find a novel possibility for gas discharge based short-wavelength radiation sources with high average radiation output in quasi-continuous discharge operation by which efficient cooling principles can be implemented using inexpensive and simple means in order to prevent a temporary melting of the electrode surfaces and, therefore, to ensure a long lifetime of the electrodes. According to the invention, this object is met in that special cooling channels for circulating coolant are integrated in electrode collars of the electrode housings. The cooling channels are advanced radially up to within a few millimeters of the highly thermally stressed surface regions and are connected by necked-down channel portions which are arranged coaxial to the axis of symmetry and which are provided with channel structures for increasing the inner surface and for increasing the flow rate of the coolant.
摘要:
The invention is directed to an arrangement for the generation of intensive short-wavelength radiation based on a gas discharge plasma. It is the object of the invention to find a novel possibility for generating intensive short-wavelength radiation, particularly EUV radiation, based on a gas discharge plasma which achieves a long life of the electrode system along with a high total efficiency of the radiation source without substantially increasing the dimensions of the discharge unit. This object is met, according to the invention, in that exclusively suitably shaped vacuum insulation areas which have the shape of an annular gap and which are formed depending on the product of gas pressure (p) and interelectrode distance (d) between the cathode and anode are provided for insulating the cathode and anode from one another in a cylindrically symmetric electrode arrangement for reliable suppression of electron arcing.
摘要:
The arrangement for generating EUV radiation based on electrically triggered gas discharges with high repetition rates and high average outputs. The object of the invention, to find a novel possibility for generating EUV radiation based on a gas discharge pumped plasma which permits the generation of EUV pulse sequences with a pulse repetition frequency of greater than 5 kHz at pulse energies of at least 10 mJ/sr without having to tolerate increased electrode wear, is met according to the invention in that a plurality of source modules of identical construction, each of which generates a radiation-emitting plasma and has bundled EUV radiation, are arranged in a vacuum chamber so as to be uniformly distributed around an optical axis of the source in its entirety in order to provide successive radiation pulses at a point on the optical axis, so that a reflector device which is supported so as to be rotatable around the optical axis deflects the radiation delivered by the source modules in the direction of the optical axis successively with respect to time. A synchronization device triggers the source modules in a circularly successive manner depending upon the actual rotational position of the reflector device and adjusts a preselected pulse repetition frequency by means of the rotating speed.
摘要:
The invention is directed to a method for the energy stabilization of a gas discharge-pumped radiation source that is operated in defined pulse sequences, particularly for suppression of overshooting and undershooting of excimer lasers and EUV radiation sources in burst operation. It is the object of the invention to find a novel possibility for the stabilization of the energy emission of a gas discharge-pumped radiation source that is operated in defined pulse sequences (bursts) which makes it possible to take into account a temporary behavior of the radiation source at the beginning of every burst without repeated recalibration of the energy-voltage curve. In a method with proportional regulation of the charging voltage as a function of the measured pulse energy, the object stated above is met according to the invention in that the pulse energy En(p) to be adjusted for a current pulse in the current burst is calculated from the pulse energy of the preceding pulse in the current burst and an identical pulse En(p-1) of a preceding precursor burst, wherein the precursor burst is an unregulated model burst and the high voltage which is to be adjusted currently for the current pulse is calculated from the current pulse energy En(p) by dividing by the rise dE/dU of the function of the pulse energy depending on the charging voltage in the linear operating range of the radiation source.