Patent ID: 7799631

Claim:
A dielectric layer of a capacitor, comprising: a first dielectric layer consisting essentially of zirconium oxide (ZrO 2 ); a second dielectric layer consisting essentially of aluminum oxide (Al 2 O 2 ) formed over the first dielectric layer, the second dielectric layer having a dielectric constant lower than that of the first dielectric layer, wherein the second dielectric layer has a thickness that is less than a thickness of the first dielectric layer; and a third dielectric layer consisting essentially of zirconium oxide (ZrO 2 ) formed over the second dielectric layer, the third dielectric layer having a dielectric constant higher than that of the second dielectric layer, wherein the third dielectric layer has a greater thickness than each of the first and second dielectric layer, wherein the thickness of the first dielectric layer is approximately 30 Å or greater and less than approximately 60 Å, the thickness of the third dielectric layer is approximately 60 Å or greater, and the thickness of the second dielectric layer is approximately 2 Å or greater and less than approximately 10 Å.