Patent ID: 7651909
Filing Date: 2010-01-26
Classification: H01L

Abstract:
1. A method for fabricating a metal-insulator-metal capacitor, comprising the steps of: forming a first metal layer on a substrate; performing a first plasma treatment on a surface of the first metal layer to form a first oxide layer directly on the first metal layer, wherein a reactive gas used in the first plasma treatment is nitrous oxide; forming a second oxide layer over the first oxide layer; forming a nitride layer over the second oxide layer; performing a second plasma treatment process on the surface of the nitride layer to form a third oxide layer over the nitride layer; performing a deposition process to form a fourth oxide layer over the third oxide layer; forming a second metal layer over the fourth oxide layer; and defining the second metal layer, the fourth oxide layer, the third oxide layer, the nitride layer, the second oxide layer and the first metal layer to form the metal-insulator-metal capacitor.