Patent ID: 7786521
Filing Date: 2010-08-31
Classification: H01L

Abstract:
1. A capacitor in a semiconductor device, comprising: a bottom electrode formed on a substrate; a first dielectric layer made of Al a second dielectric layer made of titanium dioxide (TiO a third dielectric layer made of Al an upper electrode formed directly on the third dielectric layer, wherein the first dielectric layer is formed to improve an interfacial characteristic between the bottom electrode and the second dielectric layer, and the third dielectric layer is formed to improve an interfacial characteristic between the second dielectric layer and the upper electrode, wherein the first dielectric layer is formed of the same material as the third dielectric layer, the second dielectric layer in rutile phase has a dielectric constant ranging from approximately 90 to 170, and the first, second and third dielectric layers are formed directly on the bottom electrode sequentially.