Patent ID: 11946858
Assignee: HITACHI HIGH-TECH CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An examination device that inspects a substrate placed on a stage, the examination device comprising:
a gas supply unit, which includes a fan, that supplies a flow of gas from a side of the stage to inside of an inspection chamber where the stage is disposed;
an exhaust port that discharges the gas from the inspection chamber; and
a rectifying plate that rectifies flow of the gas,
wherein the rectifying plate has a first part disposed over a portion of an upper surface of the stage,
wherein the rectifying plate has a second part that is disposed between a supply port by which the gas supply unit injects the gas and the stage so as to prevent flow of the gas supplied by the gas supply unit from directly hitting the substrate,
wherein the first part and the second part are formed as continuous parts of the rectifying plate,
wherein the rectifying plate is disposed such that a first gap exists between the first part and the portion of the upper surface of the stage, and
wherein the rectifying plate is disposed such that a second gap is between the second part and the stage.