Patent ID: 8149005
Filing Date: 2012-04-03
Classification: G01B,H01L

Abstract:
1. A position detecting jig for performing a position alignment of a transfer point of a transfer arm which holds and transfers a substrate, the jig comprising: an external controller; a substrate body transferable by the transfer arm; and an electrostatic capacitance detecting sensor for detecting an electrostatic capacitance in relation with a reference object for the position alignment, wherein the electrostatic capacitance detecting sensor includes: a plurality of electrostatic capacitance detecting electrodes, each forming the electrostatic capacitance between the reference object and the electrostatic capacitance detecting electrode; and a control circuit for controlling a detection of the electrostatic capacitance by each electrostatic capacitance detecting electrode, while communicating with each electrostatic capacitance detecting electrode, wherein the electrostatic capacitance detecting electrodes are provided on a rear surface of the substrate body, and the control circuit is provided on a front surface of the substrate body, and coordinates (x, y) of the reference object with respect to the substrate body is calculated by said external controller based on a preset relationship between electrostatic capacitance values of multiple electrostatic capacitance detecting electrodes and a position of the reference object with respect to the substrate body.