摘要:
A method and an apparatus for manufacturing a semiconductor wafer are provided for improving a quality of the semiconductor wafer, and further, for improving a quality of a semiconductor device manufactured by using the semiconductor wafer, by preventing warping from being generated at a stage of a placing step, at the time of performing heat treatment to a semiconductor wafer substrate. The placing process is performed by a placing means so that a time when a temperature difference between a wafer front surface temperature and a wafer rear surface temperature becomes maximum, and a time when warping is generated in the wafer are prior to a time when the wafer is brought into contact with lift pins or a susceptor (i.e., a time after the temperature is at an upper limit value of an infrared temperature region at 600° C.), and the lift pins are brought into contact with the wafer rear surface.
摘要:
In a manufacturing apparatus for manufacturing an epitaxial wafer with a wafer being mounted substantially concentrically with a susceptor, a center rod is provided to extend in an up-and-down direction on a side of a non-mounting surface of the susceptor so that its upper end is adjacent to the center of the susceptor. With this arrangement, part of radiation light irradiated toward the susceptor is diffusely reflected by the center rod before reaching the central portion of the susceptor, thereby reducing the amount of the radiation light irradiated to the central portion of the susceptor as well as lowering the temperature of the portion. Since the center rod and the susceptor are not in surface contact, the center rod does not take the heat from the susceptor, thereby suppressing the temperature from decreasing locally at the central portion of the susceptor.
摘要:
A method of forming an epitaxial layer to increase flatness of an epitaxial silicon wafer is provided. In particular, a method of controlling the epitaxial layer thickness in a peripheral part of the wafer is provided. An apparatus for manufacturing an epitaxial wafer by growing an epitaxial layer with reaction of a semiconductor wafer and a source gas in a reaction furnace comprising: a pocket in which the semiconductor wafer is placed; a susceptor fixing the semiconductor; orientation-dependent control means dependent on a crystal orientation of the semiconductor wafer and/or orientation-independent control means independent from the crystal orientation of the semiconductor wafer, wherein the apparatus may improve flatness in a peripheral part of the epitaxial layer.
摘要:
A method of manufacturing an epitaxial wafer in which an epitaxial layer is grown over a main surface of a silicon wafer placed substantially horizontally on a susceptor is provided. The method comprises: a growing step of the epitaxial layer; and a cooling step of cooling the epitaxial wafer having the epitaxial layer. The cooling step comprises: a wafer measurement step of measuring a temperature of the epitaxial wafer; a susceptor measurement step of measuring a temperature of the susceptor; and a control step of controlling a heater capable of heating at least the susceptor or the epitaxial wafer such that difference between a temperature of the epitaxial wafer and a temperature of the susceptor is within a predetermined range.
摘要:
A role of a bottom face of a silicon wafer is identified in a manufacturing process of the silicon wafer. And preferable characteristic feature is also identified. In order to obtain the above characteristic feature, a process method to be implemented into the method of manufacturing a normal silicon wafer is provided. For example, the method comprises: a pre-cleaning process for cleaning the silicon wafer having top and bottom faces processed to a mirror finish; and a rapid thermal process or an epitaxial growth process, wherein the pre-cleaning process comprises a hydrofluoric acid (HF) process and a subsequent pure water (DIW) process.
摘要:
A method of forming an epitaxial layer to increase flatness of an epitaxial silicon wafer is provided. In particular, a method of controlling the epitaxial layer thickness in a peripheral part of the wafer is provided. An apparatus for manufacturing an epitaxial wafer by growing an epitaxial layer with reaction of a semiconductor wafer and a source gas in a reaction furnace comprising: a pocket in which the semiconductor wafer is placed; a susceptor fixing the semiconductor; orientation-dependent control means dependent on a crystal orientation of the semiconductor wafer and/or orientation-independent control means independent from the crystal orientation of the semiconductor wafer, wherein the apparatus may improve flatness in a peripheral part of the epitaxial layer.