Patent ID: 7465935

Claim:
A defect inspection device, comprising: an illumination means obliquely irradiating a subject on which a pattern is formed with ultraviolet light having an elongated shape in one direction; a detection optical system having a solid image pick-up device receiving and detecting light at least one of reflected and scattered from said subject which is irradiated with light by the illumination means; and a signal processor detecting at least one of foreign matters and defects on said subject based on signals detected by the detection optical system, wherein said solid image pick-up device is a back-side irradiation type electron multiplying solid image pick-up device having more than 1,000 pixels provided with an anti-blooming characteristic and plural signal outputs to output plural signals in parallel and is capable of variably multiplying electrons generated through photoelectric conversion when said at least one of reflected and scattered light is received: and wherein said signal processor processes said signals output in parallel from said image pick-up device with a signal output rate which is at least 1 GPPS.