Abstract:
PROBLEM TO BE SOLVED: To provide a defect inspecting apparatus which realizes high resolution and high inspection speed in a technology for inspecting defects, foreign substances, residues and steps in patterns on a wafer in a manufacturing process of a semiconductor device by using an electron beam. SOLUTION: An electric field is formed on a surface of an inspected semiconductor 7, and decelerates the electron beam. The electron beam (the planar electron beam) including an energy component incapable of reaching the surface of the inspected semiconductor by the deceleration electric field and having a constant area, is reflected in the vicinity of the surface of the inspected semiconductor and imaged by an imaging lens 11. Images of a plurality of regions on the surface of the inspected semiconductor are acquired, and stored in an image storage. The existence and locations of the defects in the regions are measured by comparing the stored image of a plurality of the regions. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a high-resolution and high-speed defect inspection apparatus for inspecting the defect of a pattern on a wafer, foreign particles, residues, steps or the like by an electron beam in a process for manufacturing a semiconductor device. SOLUTION: The defect inspection apparatus is constructed as to store images of a plurality of areas of a semiconductor surface to be inspected by forming images by a image forming lens 11 by reflecting an electron beam (a planar electron beam) at the near surface of a semiconductor to be inspected. The electron beam contains an energy component that can not reach the surface of the semiconductor to be inspected caused by a decelerating electronic field formed for decelerating the electron beam on the surface of the semiconductor 7 to be inspected. The defect inspection apparatus is constituted to detect the presence or absence of defects and positions of the defects in the area by comparing stored images in the plurality of areas. COPYRIGHT: (C)2005,JPO&NCIPI