Patent ID: 7344982
Filing Date: 2008-03-18
Classification: C23C,H01L

Abstract:
1. A method of making a semiconductor wafer, comprising: disposing the semiconductor wafer in a reaction chamber, the semiconductor wafer having an oxide layer defined by a pattern; and alternately supplying ruthenium and oxygen into the reaction chamber to induce selective deposition of the ruthenium onto a surface of the semiconductor wafer, wherein the selective deposition bonds the ruthenium only to the patterned oxide layer on the surface of the semiconductor wafer while inhibiting the bonding of ruthenium to any other area of the surface of the semiconductor wafer in order to form a metal interconnect on the surface of the semiconductor wafer as defined by the pattern, the step of alternately supplying the ruthenium and oxygen including the steps of, (a) enabling a flow of the ruthenium into the reaction chamber during a first time period, (b) disabling the flow of the ruthenium into the reaction chamber at an end of the first time period, (c) enabling a flow of the oxygen into the reaction chamber during a second time period which occurs after the end of the first time period, (d) disabling the flow of the oxygen into the reaction chamber at an end of the second time period, (e) enabling the flow of the ruthenium during a third time period which occurs after the end of the second time period, (f) disabling the flow of the ruthenium into the reaction chamber at an end of the third time period, (g) enabling the flow of the oxygen into the reaction chamber during a fourth time period which occurs after the end of the third time period, and (h) disabling the flow of the oxygen into the reaction chamber at an end of the fourth time period.