摘要:
A lithographic apparatus is disclosed. The apparatus includes a source (5) for supplying hydrogen radicals (1), a guide (2) for use in conjunction with the source, for directing hydrogen radicals to an application surface (4) to be targeted by the hydrogen radicals. The guide is provided with a coating (8) having a hydrogen radical recombination constant of less than 0.2. In this way, the radicals can be transported with reduced losses and are able to better interact with remaining contaminants on application surfaces, such as mirror surfaces.
摘要:
An optical element includes a first layer (4) that includes a first material, and is configured to be substantially reflective for radiation of a first wavelength and substantially transparent for radiation of a second wavelength. The optical element includes a second layer (2) that includes a second material, and is configured to be substantially absorptive or transparent for the radiation of the second wavelength. The optical element includes a third layer (3) that includes a third material between the first layer and the second layer, and is substantially transparent for the radiation of the second wavelength and configured to reduce reflection of the radiation of the second wavelength from a top surface of the second layer facing the first layer. The first layer is located upstream in the optical path of incoming radiation with respect to the second layer in order to improve spectral purity of the radiation of the first wavelength.
摘要:
A lithographic apparatus includes a radiation source and an object (301) with a first surface (302) which is configured to retain metal contaminants. This surface has the function of a getter. The first surface is arranged substantially outside the region traversed by the radiation beam generated by the radiation source during lithographic processing. The first surface may further be used to retain volatile contaminants generated in a cleaning method.
摘要:
An optical element includes a first layer (4) that includes a first material, and is configured to be substantially reflective for radiation of a first wavelength and substantially transparent for radiation of a second wavelength. The optical element includes a second layer (2) that includes a second material, and is configured to be substantially absorptive or transparent for the radiation of the second wavelength. The optical element includes a third layer (3) that includes a third material between the first layer and the second layer, and is substantially transparent for the radiation of the second wavelength and configured to reduce reflection of the radiation of the second wavelength from a top surface of the second layer facing the first layer. The first layer is located upstream in the optical path of incoming radiation with respect to the second layer in order to improve spectral purity of the radiation of the first wavelength.