Defectivity and process control of electroless deposition in microelectronics applications
First Claim
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1. A method for electrolessly depositing Co, Ni, or alloys thereof onto a substrate in manufacture of microelectronic devices, the method comprising:
- contacting the substrate with an electroless deposition composition comprising (a) a grain refiner comprising a grain refiner compound selected from the group consisting of a polyphosphoric acid, a polyphosphate salt, and a combination thereof wherein said grain refiner compound is a compound having a formula M(n+2)PnO(3n+1) or (MPO3)n, where M represents a counter ion, and n=3 to 600; and
(b) a source of deposition ions selected from the group consisting of Co ions and Ni ions.
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Abstract
Methods and compositions for electrolessly depositing Co, Ni, or alloys thereof onto a substrate in manufacture of microelectronic devices. Grain refiners, levelers, oxygen scavengers, and stabilizers for electroless Co and Ni deposition solutions.
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Citations
22 Claims
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1. A method for electrolessly depositing Co, Ni, or alloys thereof onto a substrate in manufacture of microelectronic devices, the method comprising:
contacting the substrate with an electroless deposition composition comprising (a) a grain refiner comprising a grain refiner compound selected from the group consisting of a polyphosphoric acid, a polyphosphate salt, and a combination thereof wherein said grain refiner compound is a compound having a formula M(n+2)PnO(3n+1) or (MPO3)n, where M represents a counter ion, and n=3 to 600; and
(b) a source of deposition ions selected from the group consisting of Co ions and Ni ions.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electroless plating solution for plating a metal capping layer onto a metal-filled interconnect in a microelectronic device, the solution comprising:
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a source of deposition ions selected from the group consisting of Co ions and Ni ions; a reducing agent; and a grain refiner compound selected from the group consisting of a polyphosphoric acid, a polyphosphate salt, and a combination thereof wherein said grain refiner compound is a compound having a formula M(n+2)PnO(3n+1) or (MPO3)n, where M represents a counter ion, and n=2 to 600. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification