Abstract:
An extreme ultraviolet ray generation device includes a base material supply unit, a laser irradiation unit, a light collection unit, and a guide unit. The base material supply unit supplies base material for generating extreme ultraviolet rays. The laser irradiation unit irradiates laser using the base material supplied from the base material supply unit and generates extreme ultraviolet rays. The light collection unit collects the extreme ultraviolet rays generated by the laser irradiation unit. The guide unit guides the base material to a position to which the laser is irradiated. The guide unit includes at least one gas spray hole for spraying gas between the base material supply unit and the position to which the laser is irradiated to form a gas curtain surrounding the base material. By doing so, it is possible to guide the base material to the exact position to which the laser is irradiated and prevent the light collection unit from being contaminated by particulates.
Abstract:
A level sensor of an exposure apparatus is disclosed. The level sensor comprises: a light source irradiating the surface of a wafer with light; a projecting unit having a first slit which the light from the light source passes through and is single, not a periodic grid; and a detecting unit having a second slit which light reflected from the surface of the wafer passes through and is single, not a periodic grid; and a detector detecting the reflected light passing through the second slit of the detecting unit.
Abstract:
PURPOSE: A method for monitoring semiconductor equipment is provided to reduce measurement errors by using a Moire interferometer for directly measuring a bare substrate or wafer chuck. CONSTITUTION: A free pattern beam is reflected from an object device to form a pattern beam (S11). The pattern beam passes through a first grating. A Moire interference pattern is formed (S12). The Moire interference pattern is analyzed. The height map of the object device is produced (S13). [Reference numerals] (AA) Start; (BB) End; (S10) Source beam passes through a first grating and foms a free pattern beam; (S11) Free pattern beam is reflected from an object device to form a pattern beam; (S12) Pattern beam passes through a first grating. A Moire interference pattern is formed; (S13) Moire interference pattern is analyzed. The height map of the object device is produced
Abstract:
PURPOSE: An overlay measurement method is provided to precisely measure the overlay between upper and lower patterns from a virtual image before performing a patterning process with respect to an upper film, thereby repairing the upper film without discarding a semiconductor substrate. CONSTITUTION: First information with respect to a first structure is acquired(ST130). A second auxiliary structure is arranged on the first structure(ST140). The first structure and second auxiliary structure are arranged(ST150). Second information with respect to the second auxiliary structure is acquired(ST160). Virtual information is acquired by synthesizing the first information and second information(ST170). A virtual overlay between the first structure and second structure is measured from the virtual information(ST180).
Abstract:
PURPOSE: A method for measuring the focus change of a photolithography device and a method for manufacturing a semiconductor device are provided to improve productivity by rapidly measuring the focus change on a wafer region. CONSTITUTION: A photo mask and a wafer are inputted to a photolithography device(S10). Light for measurement is irradiated to the wafer. The image of an optical pattern is transferred on the photoresist layer by using an ultraviolet ray(S20). The photoresist layer is baked(S30). The photoresist layer is inspected(S40). The inspection result of the photoresist layer is analyzed(S50).