Patent ID: 7531422

Claim:
A method for fabricating a capacitor in a semiconductor device, the method comprising the steps of: forming a lower electrode on a substrate; forming an amorphous hafnium-terbium oxide (Hf 1-x Tb x O) dielectric layer on the lower electrode; crystallizing the Hf 1-x Tb x O dielectric layer by performing a thermal process; and forming an upper electrode on the Hf 1-x Tb x O dielectric layer, wherein: the Hf 1-x Tb x O dielectric layer is formed with a thickness less than approximately 100 Å and the Hf 1-x Tb x O dielectric layer is formed by an atomic layer deposition (ALD) method; and the ALD method for forming the Hf 1-x Tb x O dielectric layer proceeds by repeatedly performing a cycle of sequentially providing a Hf-source gas, a purge gas, a Tb source gas, a purge gas, a reaction gas, and a purge gas.