Patent ID: 11940485
Assignee: TOKYO ELECTRON LIMITED
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 4:
5. An inspection method for inspecting an inspection target device, wherein the inspection target device formed on an inspection object is a back-illuminated imaging device into which light is incident from a rear surface which is a surface opposite to a side on which a wiring layer is provided, the inspection method comprising:
placing the inspection object on a light transmitter of a stage such that the rear surface of the imaging device faces the light transmitter which is made of a light-transmissive material;
irradiating light from a plurality of light sources to be incident on a side end surface of a flat light guide plate, which is disposed to face the inspection object in a region under the light transmitter such that the light transmitter is interposed between the inspection object and the flat light guide plate, the plurality of light sources being provided in a region below the light transmitter and laterally outside the light transmitter and being provided along the side end surface of the light guide plate; and
diffusing the light emitted from the plurality of light sources and incident on the side end surface of the light guide plate inside the light guide plate and emitting the light as planar light from a surface of the light guide plate facing the inspection object.