Patent ID: 7026830
Filing Date: 2006-04-11
Classification: G01R,H01J

Abstract:
1. A circuit pattern inspection apparatus comprising: an electron source for generating a primary electron beam; a lens system for converging said primary electron beam; a sample table for mounting a sample thereon; a deflector for making said converged electron beam performs scanning on said sample on which a circuit pattern is formed; a power supply through which a negative voltage is applied to said sample table or said sample; a detector for detecting secondary charged particles generated secondarily from said sample; a storage circuit for forming an image on the basis of a signal from said detector and storing the thus formed image; a comparator circuit for comparing the image of a concerned region stored in said storage circuit with another image in another region in which another same circuit pattern is formed; a judgment circuit for judging a defect in said circuit pattern from a result of the comparison; and a control portion to which one of parameter, instruction and condition for operating arbitrary portion of the apparatus is inputted, wherein said control portion adjusts the respective portion of the apparatus in accordance with said inputted instruction or condition.