Patent ID: 11927539
Assignee: TOKYO ELECTRON LIMITED
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. An inspection apparatus for inspecting an inspection subject device formed at an object to be inspected, the inspection subject device being a reverse-side irradiation-type imaging device into which light is incident from a reverse side opposite to a side where a wiring layer is provided,
the inspection apparatus comprising:
a placement table having a transparent surface on which the object to be inspected is placed;
a light irradiation mechanism disposed in the placement table and configured to irradiate light to the to-be-inspected object placed on the placement table through the placement surface;
an acquisition unit configured to acquire in-plane distribution of an illuminance of light from the placement surface;
an illuminance measuring unit configured to measure an illuminance of light from a part of the placement surface; and
a moving mechanism configured to relatively move the illuminance measuring unit and the placement table,
wherein the acquisition unit acquires the in-plane distribution of the illuminance of the light from the placement surface based on a measurement result of the illuminance of the light from each area on the placement surface obtained by the illuminance measuring unit that is relatively moved with respect to the placement table on a horizontal plane by the moving mechanism.