Patent ID: 8007865

Claim:
An atomic layer deposition method comprising: providing a semiconductor substrate in a reactor; and conducting one or more atomic layer deposition cycles to deposit one or more monolayers of the same material, the conducting of one or more atomic layer deposition cycles comprising: providing, in each cycle, a pulse of a first precursor gas into the reactor at a first temperature, providing, in each cycle, a first pulse of a second precursor gas into the reactor at a second temperature, and providing, at least once during the cycles, a second pulse of the second precursor gas at a third temperature lower than the second temperature, the second pulse of the second precursor gas not being used to form a plasma, wherein only the first precursor gas and the second precursor gas are provided as precursors during the conducting of the atomic layer deposition cycles, and wherein the first precursor gas is provided only at the first temperature, wherein the first precursor gas comprises hafnium tetrachloride and the second precursor gas comprises H2O.