Patent ID: 7268038
Filing Date: 2007-09-11
Classification: H01L

Abstract:
1. A method for fabricating a MIM capacitor in a semiconductor die, said method comprising steps of: depositing a first interconnect metal layer; depositing a layer of silicon nitride on said first interconnect metal layer; etching said layer of silicon nitride to form a MIM capacitor dielectric segment; depositing a layer of MIM capacitor metal on said layer of silicon nitride; etching said layer of MIM capacitor metal to form an upper electrode of said MIM capacitor; wherein said MIM capacitor dielectric segment has a thickness of less than approximately 350.0 Angstroms, and wherein said layer of silicon nitride is deposited in a deposition process using an ammonia-to-silane ratio of at least 12.5, such that said MIM capacitor has a capacitance density of at least 2.0 fF/um