Patent ID: 8926753
Filing Date: 2015-01-06
Classification: C23C,C30B,Y10T

Abstract:
1. A vapor phase growth apparatus that allows vapor phase growth of a silicon single crystal film on a main surface of a silicon single crystal substrate, comprising: a reaction vessel that comprises: a disc-formed susceptor that is rotatable about an axis in an inner space of the reaction vessel on which the silicon single crystal substrate is disposed in a near-horizontally rotating manner in the inner space of the reaction vessel; a bank component that surrounds the susceptor and that is positioned so that a top surface of the bank component aligns with a top surface of the susceptor; an upper lining component that overlaps the bank component; and a gas introducing gap formed by the bank component and the upper lining component that is configured to communicate with the reaction vessel, the gas introducing gap having a length that is parallel to the horizontal standard line, the length of the gas introducing gap decreasing in a continuous or step-wise manner as a distance from the horizontal standard line increases in a width-wise direction, wherein: the vapor growth apparatus is configured (1) to allow the source gas to flow along the main surface of the silicon single crystal substrate, and (2) to open the gas introducing port such that the gas introducing port opposes an outer peripheral surface of the bank component so that the source gas supplied through the gas introducing port collides against the outer peripheral surface of the bank component, climbs up onto the top surface of the bank component, and flows along the main surface of the silicon single crystal substrate positioned on the susceptor, the horizontal standard line is a virtual center line along a direction of flow of the source gas that extends from the first end side of the reaction vessel to the second end side of the reaction vessel, and is normal to and intersects the axis of rotation of the susceptor, the width-wise direction is a direction that is normal to both the axis of rotation of the susceptor and the horizontal standard line, the top surface of the bank component has an inner periphery located on a side closest to the axis of rotation of the susceptor, the inner periphery of the top surface of the bank component forms an arc that has a center that coincides with the axis of rotation of the susceptor, the upper lining component has a lower surface that is parallel to and overlaps the top surface of the bank component, the lower surface of the upper lining component has an inner periphery located on a side closest to the axis of rotation of the susceptor, the inner periphery of the lower surface of the upper lining component forms an arc that has a center that is on the second end side of the axis of rotation, and the radius of the arc formed by the inner periphery of the lower surface of the upper lining component is greater than the radius of the arc formed by the inner periphery of the top surface of the bank component.