Patent ID: 9025133
Filing Date: 2015-05-05
Classification: G03F

Abstract:
1. A laser interference lithography apparatus, comprising: a laser source providing a first laser beam; an optics assembly, which is optically coupled to the laser source, receives the first laser beam and processes the first laser beam into one or multiple second laser beams; an exposure stage for carrying a to-be-exposed object; and a fiber assembly, which receives the one or multiple second laser beams and processes the one or multiple second laser beams into one or multiple single mode and stable coherent third laser beams, wherein a range of an operating wavelength of the fiber assembly covers a wavelength of the second laser beam, an interference pattern is generated on the to-be-exposed object using the one or multiple third laser beams, and an optical path is formed from an output end of the laser source to the exposure stage, wherein the optics assembly provides the one second laser beam, the fiber assembly comprises a single optical fiber and outputs the one third laser beam, a first end of the fiber assembly is optically coupled to the optics assembly, and the laser interference lithography apparatus further comprises a holder coupled to a second end of the fiber assembly, wherein the exposure stage carries a reflecting mirror, a first portion of the third laser beam illuminates the reflecting mirror and is reflected, by the reflecting mirror, to the to-be-exposed object, and a second portion of the third laser beam interferes with the first portion of the third laser beam on the to-be-exposed object to generate the interference pattern.