Abstract:
According to one aspect of the invention, a method and apparatus for polarizing electromagnetic radiation is provided. The electromagnetic radiation may be divided into first and second portions, substantially all of the first portion may be linearly polarized in a first direction and substantially all of the second portion may be linearly polarized in a second direction, the first direction being substantially orthogonal to the second direction. The linear polarization of at least one of the first and second portions may be changed such that substantially all of both of the first and second portions are linearly polarized in a third direction. At least one of the first and second portions may be redirected such that substantially all of both the first and second portions are propagating in a fourth direction.
Abstract:
The present invention relates to a composite sputtering target comprising a plurality of bonded metal pieces. The composite sputtering target further comprises a bonded region between the metal pieces. The bonded region may comprise an inter-metallic region upon bonding. The composite sputter target of the present invention may be used in conjunction with an apparatus for sputtering alloy films on substrates.
Abstract:
An optical device having a high reflector tunable stress coating includes a micro-electromechanical system (MEMS) platform, a mirror disposed on the MEMS platform, and a multiple layer coating disposed on the mirror. The multiple layer coating includes a layer of silver (Ag), a layer of silicon dioxide (SiO2) deposited on the layer of Ag, a layer of intrinsic silicon (Si) deposited on the layer of SiO2, and a layer of silicon oxynitride (SiOxNy) deposited on the layer of Si. The concentration of nitrogen is increased and/or decreased to tune the stress (e.g., tensile, none, compressive).
Abstract:
In an implementation, energy reaching the lower surface of a photoresist may be redirected back into the photoresist material. This may be done by, for example, reflecting and/or fluorescing the energy from a hardmask provided on the wafer surface back into the photoresist.
Abstract:
In an implementation, energy reaching the lower surface of a photoresist may be redirected back into the photoresist material. This may be done by, for example, reflecting and/or fluorescing the energy from a hardmask provided on the wafer surface back into the photoresist.
Abstract:
An illumination system for an extreme ultraviolet (EUV) lithography system may include multiple sources of EUV light. The system may combine the light from the multiple sources when illuminating a mask.
Abstract:
The invention provides a reeling device for a hoisting system, including a flexible member having a lower end and an upper end, a rotatable drum on which the flexible member is windable, disk means rotatably mounted on said drum, to which disk means the upper end of the flexible member is anchored, and a stop mechanism activated by the disk means once the flexible member has completely unreeled from the drum.
Abstract:
A method for making a substrate for a mirror used in photolithography is described. That method comprises forming a crystalline layer on a first layer, which has a low coefficient of thermal expansion. Part of the crystalline layer is then removed to form on the first layer a second layer that has a high quality surface finish.
Abstract:
A light condenser suitable for EUV lithography that includes reflective rings concentric to an optical axis. Each ring has a reflective surface to reflect light rays emanating from a light source so that the light rays converge towards a mask to produce Köhler illumination on the mask. The reflective surface has a curve segment that includes a section of a parabolic curve that is rotated relative to an optical axis and has a focal point at the light source.
Abstract:
In one embodiment of the invention, a grating structure etched on a mirror substrate has a grating period causing diffracting, out of an optical path, a first incident radiation within a first band around a first wavelength. A multi-layer coating deposited on the grating structure reflects the first incident radiation, in the optical path, within the first band and a second incident radiation within a second band around a second wavelength. In another embodiment, a first multi-layer coating deposited on a mirror substrate reflects a first incident radiation within a first band around a first wavelength and a second incident radiation, in an optical path, within a second band around a second wavelength. A grating structure is deposited on the first multi-layer coating. The grating structure is etched to have a grating period causing diffracting, out of the optical path, the second incident radiation within the second band.