Patent ID: 6291351
Filing Date: 2001-09-18
Classification: B24B,G11B

Abstract:
A method of fabricating a cloisonne structure in which a top surface of a metal oxide layer is made coplanar with a top surface of a metallic structure formed on a substrate, the method comprising the steps of:depositing a nitride layer at least on the top surface of the metallic structure;depositing the metal oxide layer over the metallic structure and the nitride layer;polishing the metal oxide layer by a chemical-mechanical polishing (CMP) process using a slurry, so that metal oxide over the nitride layer is removed, thereby exposing the nitride layer on the top surface of the metallic structure;polishing the metal oxide layer and the nitride layer by the CMP process, where polishing of the nitride layer causes ammonia to be generated in the slurry;extracting the ammonia as a gas from the slurry;generating a signal in accordance with a concentration of ammonia extracted in said extracting step; andterminating the CMP process in accordance with a change in the signal.