Substrate processing method and fabrication process of a semiconductor device
First Claim
1. A method of fabricating a semiconductor device, comprising:
- forming a via-hole in an interlayer insulation film such that a metal interconnection pattern formed underneath said interlayer insulation film is exposed at a bottom of said via-hole;
forming a conductive barrier film on said interlayer insulation film so as to cover a sidewall surface of said via-hole and said exposed metal interconnection pattern in conformity with a shape of said via-hole; and
forming a metal film on said conductive barrier film,wherein there is provided a preprocessing step, after said forming said via-hole but before said forming said conductive barrier film, processing said interlayer insulation film including said sidewall surface of said via-hole and a bottom surface of said via-hole, with plasma containing hydrogen having energy not causing sputtering of said metal interconnection pattern, such that a surface of said interlayer insulation film, said sidewall surface of said via-hole and said bottom surface of said via-hole are terminated by hydrogen,wherein said forming said conductive barrier film comprises covering said surface of said interlayer insulation film with a conductive nitride film including said sidewall surface and bottom surface of said via-hole, and covering said conductive nitride film by a refractory metal film, andwherein said forming said conductive nitride film comprises;
a first step covering said surface of said interlayer insulation film and said sidewall surface and bottom surface of said via-hole by organic metal source molecules containing nitrogen, and a second step decomposing said organic metal source molecules, said first step and said second step being repeated with intervening purging steps.
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Abstract
A method of fabricating a semiconductor device includes the steps of forming a via-hole in an interlayer insulation film such that a metal interconnection pattern formed underneath the interlayer insulation film is exposed at a bottom of the via-hole, forming a conductive barrier film on the interlayer insulation film so as to cover a sidewall surface of the via-hole and the exposed metal interconnection pattern in conformity with a shape of the via-hole. and forming a metal film on the conductive barrier film, wherein there is provided a preprocessing step, after the step of forming the via-hole but before the step of forming the conductive barrier film, of processing the interlayer insulation film including the sidewall surface of the via-hole and a bottom surface of the via-hole, with plasma containing hydrogen having energy not causing sputtering of the metal interconnection pattern.
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Citations
26 Claims
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1. A method of fabricating a semiconductor device, comprising:
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forming a via-hole in an interlayer insulation film such that a metal interconnection pattern formed underneath said interlayer insulation film is exposed at a bottom of said via-hole; forming a conductive barrier film on said interlayer insulation film so as to cover a sidewall surface of said via-hole and said exposed metal interconnection pattern in conformity with a shape of said via-hole; and forming a metal film on said conductive barrier film, wherein there is provided a preprocessing step, after said forming said via-hole but before said forming said conductive barrier film, processing said interlayer insulation film including said sidewall surface of said via-hole and a bottom surface of said via-hole, with plasma containing hydrogen having energy not causing sputtering of said metal interconnection pattern, such that a surface of said interlayer insulation film, said sidewall surface of said via-hole and said bottom surface of said via-hole are terminated by hydrogen, wherein said forming said conductive barrier film comprises covering said surface of said interlayer insulation film with a conductive nitride film including said sidewall surface and bottom surface of said via-hole, and covering said conductive nitride film by a refractory metal film, and wherein said forming said conductive nitride film comprises;
a first step covering said surface of said interlayer insulation film and said sidewall surface and bottom surface of said via-hole by organic metal source molecules containing nitrogen, and a second step decomposing said organic metal source molecules, said first step and said second step being repeated with intervening purging steps. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A processor-readable medium storing program code means for configuring a general purpose computer to control a substrate processing system such that said substrate processing apparatus carries out a method of fabricating a semiconductor device, comprising:
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forming a via-hole in an interlayer insulation film such that a metal interconnection pattern formed underneath said interlayer insulation film is exposed at a bottom of said via-hole; forming a conductive barrier film on said interlayer insulation film so as to cover a sidewall surface of said via-hole and said exposed metal interconnection pattern in conformity with a shape of said via-hole; and forming a metal film on said conductive barrier film, wherein there is provided a preprocessing step, after said forming said via-hole but before said forming said conductive barrier film, processing said interlayer insulation film including said sidewall surface of said via-hole and a bottom surface of said via-hole, with plasma containing hydrogen having energy not causing sputtering of said metal interconnection pattern, such that a surface of said interlayer insulation film, said sidewall surface of said via-hole and said bottom surface of said via-hole are terminated by hydrogen, wherein said forming said conductive barrier film comprises covering said surface of said interlayer insulation film with a conductive nitride film including said sidewall surface and bottom surface of said via-hole, and covering said conductive nitride film by a refractory metal film, and wherein said forming said conductive nitride film comprises;
a first step covering said surface of said interlayer insulation film and said sidewall surface and bottom surface of said via-hole by organic metal source molecules containing nitrogen, and a second step decomposing said organic metal source molecules, said first step and said second step being repeated with intervening purging steps. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method of fabricating a semiconductor device, comprising:
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forming a via-hole in an interlayer insulation film such that a metal interconnection pattern formed underneath said interlayer insulation film is exposed at a bottom of said via-hole; forming a conductive barrier film on said interlayer insulation film so as to cover a sidewall surface of said via-hole and said exposed metal interconnection pattern in conformity with a shape of said via-hole; and forming a metal film on said conductive barrier film, wherein there is provided a preprocessing step, after said forming said via-hole but before said forming said conductive barrier film, processing said interlayer insulation film including said sidewall surface of said via-hole and a bottom surface of said via-hole, with plasma containing hydrogen having energy not causing sputtering of said metal interconnection pattern, such that a surface of said interlayer insulation film, said sidewall surface of said via-hole and said bottom surface of said via-hole are terminated by hydrogen, and wherein said forming said conductive barrier film comprises covering said surface of said interlayer insulation film with a conductive nitride film including said sidewall surface and bottom surface of said via-hole, and covering said conductive nitride film by a refractory metal film, said forming said refractory metal film comprises a third step covering a surface of said conductive nitride film with metal source molecules containing a refractory metal element constituting said refractory metal film and a fourth step decomposing said metal source molecules, said third step and said fourth step being repeated with intervening purging steps. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification