Method for forming insulation film
First Claim
1. A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising:
- vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Si—
O bond in a molecule;
introducing a reaction gas comprising the source gas and a carrier gas without a separate oxygen-supplying gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and
forming an insulation film constituted by Si, C, O, and H on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the plasma reaction is activated while controlling a flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msec≦
Rt,
Rt[s]=9.42×
107(Pr·
Ts/Ps·
Tr)rw2d/Fwherein;
Pr;
reaction space pressure (Pa)Ps;
standard atmospheric pressure (Pa)Tr;
average temperature of the reaction (K)Ts;
standard temperature (K)rw;
radius of the semiconductor substrate (m)d;
space between the semiconductor substrate and an upper electrode (m) of the reaction space,F;
total flow volume of the reaction gas (sccm),wherein said silicon-containing hydrocarbon compound has the formula Siα
Oα
−
1R2α
−
β
+2(OR′
)β
wherein α
is an integer of 1-3, β
is 0, 1, or 2, R is C1-6 hydrocarbon attached to Si, and R′
is C1-6 hydrocarbon unattached to Si, wherein R′
is CnH2n+1 wherein n is an integer of 1-3,wherein the semiconductor substrate has a via and/or trench wherein the insulation film is formed on a surface of the via and/or trench.
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Accused Products
Abstract
A method for forming an insulation film on a semiconductor substrate by plasma reaction includes: vaporizing a silicon-containing hydrocarbon having a Si—O bond compound to provide a source gas; introducing the source gas and a carrier gas without an oxidizing gas into a reaction space for plasma CVD processing; and forming an insulation film constituted by Si, C, O, and H on a substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space. The plasma reaction is activated while controlling the flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space.
345 Citations
18 Claims
-
1. A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising:
-
vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Si—
O bond in a molecule;introducing a reaction gas comprising the source gas and a carrier gas without a separate oxygen-supplying gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and forming an insulation film constituted by Si, C, O, and H on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the plasma reaction is activated while controlling a flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msec≦
Rt,
Rt[s]=9.42×
107(Pr·
Ts/Ps·
Tr)rw2d/Fwherein; Pr;
reaction space pressure (Pa)Ps;
standard atmospheric pressure (Pa)Tr;
average temperature of the reaction (K)Ts;
standard temperature (K)rw;
radius of the semiconductor substrate (m)d;
space between the semiconductor substrate and an upper electrode (m) of the reaction space,F;
total flow volume of the reaction gas (sccm),wherein said silicon-containing hydrocarbon compound has the formula Siα
Oα
−
1R2α
−
β
+2(OR′
)β
wherein α
is an integer of 1-3, β
is 0, 1, or 2, R is C1-6 hydrocarbon attached to Si, and R′
is C1-6 hydrocarbon unattached to Si, wherein R′
is CnH2n+1 wherein n is an integer of 1-3,wherein the semiconductor substrate has a via and/or trench wherein the insulation film is formed on a surface of the via and/or trench. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising:
-
vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Si—
O bond in a molecule;introducing a reaction gas comprising the source gas and a carrier gas without a separate oxygen-supplying gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and forming an insulation film constituted by Si, C, O, and H on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the high-frequency RF power is at a higher frequency than the low-frequency RF power, wherein the plasma reaction is activated while controlling a flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msec≦
Rt,
Rt[s]=9.42×
107(Pr·
Ts/Ps·
Tr)rw2d/Fwherein; Pr;
reaction space pressure (Pa)Ps;
standard atmospheric pressure (Pa)Tr;
average temperature of the reaction (K)Ts;
standard temperature (K)rw;
radius of the semiconductor substrate (m)d;
space between the semiconductor substrate and an upper electrode (m) of the reaction space,F;
total flow volume of the reaction gas (sccm),wherein the carrier gas is selected from the group consisting of He, Ar, Kr, and Xe, wherein the carrier gas is introduced at a flow rate of 10 sccm to 100 sccm, wherein the semiconductor substrate has a via and/or trench wherein the insulation film is formed on a surface of the via and/or trench.
-
-
14. A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising:
-
vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Si—
O bond in a molecule;introducing a reaction gas comprising the source gas and a carrier gas without a separate oxygen-supplying gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and forming an insulation film constituted by Si, C, O, and H on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the high-frequency RF power is at a higher frequency than the low-frequency RF power, wherein the plasma reaction is activated while controlling a flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msec≦
Rt,
Rt[s]=9.42×
107(Pr·
Ts/Ps·
Tr)rw2d/Fwherein; Pr;
reaction space pressure (Pa)Ps;
standard atmospheric pressure (Pa)Tr;
average temperature of the reaction (K)Ts;
standard temperature (K)rw;
radius of the semiconductor substrate (m)d;
space between the semiconductor substrate and an upper electrode (m) of the reaction space,F;
total flow volume of the reaction gas (sccm),wherein the insulation film is a silicon carbide film doped with oxygen.
-
-
15. A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising:
-
vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Si—
O bond in a molecule;introducing a reaction gas comprising the source gas and a carrier gas without a separate oxygen-supplying gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and forming an insulation film constituted by Si, C, O, and H on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the high-frequency RF power is at a higher frequency than the low-frequency RF power, wherein the plasma reaction is activated while controlling a flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msec≦
Rt,
Rt[s]=9.42×
107(Pr·
Ts/Ps·
Tr)rw2d/Fwherein; Pr;
reaction space pressure (Pa)Ps;
standard atmospheric pressure (Pa)Tr;
average temperature of the reaction (K)Ts;
standard temperature (K)rw;
radius of the semiconductor substrate (m)d;
space between the semiconductor substrate and an upper electrode (m) of the reaction space,F;
total flow volume of the reaction gas (sccm),wherein the insulation film is composed further of N.
-
-
16. A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising:
-
vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Si—
O bond in a molecule;introducing a reaction gas comprising the source gas and a carrier gas without a separate oxygen-supplying gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and forming an insulation film constituted by Si, C, O , and H on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the high-frequency RF power is at a higher frequency than the low-frequency RF power, wherein the plasma reaction is activated while controlling a flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msec≦
Rt,
Rt[s]=9.42×
107(Pr·
Ts/Ps·
Tr)rw2d/Fwherein; Pr;
reaction space pressure (Pa)Ps;
standard atmospheric pressure (Pa)Tr;
average temperature of the reaction (K)Ts;
standard temperature (K)rw;
radius of the semiconductor substrate (m)d;
space between the semiconductor substrate and an upper electrode (m) of the reaction space,F;
total flow volume of the reaction gas (sccm),wherein the insulation film is a barrier film for blocking Cu-diffusion. - View Dependent Claims (17)
-
-
18. A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising:
-
vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Si—
O bond in a molecule;introducing a reaction gas comprising the source gas and a carrier gas without a separate oxygen-supplying gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and forming an insulation film constituted by Si, C, O, and H on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the high-frequency RF power is at a higher frequency than the low-frequency RF power, wherein the plasma reaction is activated while controlling a flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msec≦
Rt,
Rt[s]=9.42×
107(Pr·
Ts/Ps·
Tr)rw2d/Fwherein; Pr;
reaction space pressure (Pa)Ps;
standard atmospheric pressure (Pa)Tr;
average temperature of the reaction (K)Ts;
standard temperature (K)rw;
radius of the semiconductor substrate (m)d;
space between the semiconductor substrate and an upper electrode (m) of the reaction space,F;
total flow volume of the reaction gas (sccm),wherein the semiconductor substrate has an exposed Cu layer on which the insulation film is to be formed.
-
Specification