GLOBAL PLANARIZATON FOR AN ELECTRODE OF A CONTACT-TYPE CAPACITIVE SENSOR

摘要

PURPOSE: A global planarization method for electrode of contact-type capacitive sensor, which flattens an electrode pattern, in which metal is filled, toward a substrate of a non-metallic material is provided to reduce signal noise by pattern collision. CONSTITUTION: A global planarization method for electrode of contact-type capacitive sensor is as follows. Each substrate(100) of a moving element and a fixed element is etched in fixed shape. An electrode material(200) is filled in the etched place. CMP is performed until the filled electrode material has fixed depth. A coating layer is evaporated on the formed electrode. The substrate is composed of a glass wafer. The electrode material is made of chrome.