Patent ID: 7078310
Filing Date: 2006-07-18
Classification: H01L

Abstract:
1. A method for fabricating a composite capacitor in a semiconductor die, said method comprising steps of: depositing a first interconnect metal layer over a first interlayer dielectric layer; depositing a shared metal over said first interconnect metal layer; depositing an upper high-k dielectric over said shared metal said upper high-k dielectric comprising first and second dielectric segments; forming an electrode of an upper capacitor in an upper metal situated over said shared metal, said electrode of said upper capacitor comprising a first metal plate situated on said first dielectric segment and a second metal plate situated on said second dielectric segment, said first metal plate and said first dielectric segment being separated from said second metal plate and said second dielectric segment; patterning said shared metal to form a shared electrode of said upper capacitor and a lower capacitor; patterning said first interconnect metal layer to form an electrode of said lower capacitor; connecting said electrode of said upper capacitor to said electrode of said lower capacitor so as to form said composite capacitor as a parallel combination of said lower capacitor and said upper capacitor.