Patent ID: 9645450
Date: 2017-05-09
CPC Classifications: G01B,G02F

Claim:
1. An apparatus comprising: a source unit to provide an electromagnetic signal; a receiver to receive the electromagnetic signal; a polarization element disposed between the source unit and the receiver and spaced apart from a substrate, the polarization element having a transmissive axis in a first direction, the polarization element is configured to be fixed while the substrate is rotated; a polarizer comprising metal lines and disposed on the substrate; and an exposure unit adjacent to the source unit, wherein the substrate is disposed between the source unit and the receiver, wherein the receiver is configured to receive the electromagnetic signal passed through the polarization element and the metal lines of the polarizer on the substrate, wherein at least one of a luminance and an intensity of the electromagnetic signal received by the receiver is configured to be determined when the substrate is rotated, wherein the apparatus is configured to inspect an extending direction of the metal lines of the polarizer on the substrate by the determined result of the at least one of the luminance and an intensity of the electromagnetic signal received by the receiver, and wherein the exposure unit is configured to perform a thin film process on the substrate while alignment of the substrate is maintained.