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Method of growing films on substrates at room temperatures using catalyzed binary reaction sequence chemistry

Assignee: University of Technology Corp
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Filing: 1997-10-02
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Granted: 2000-07-18
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Expires: 2017-10-02
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Abstract

Abstract The present invention provides a method for growing atomic layer thin films on functionalized substrates at room temperature using catalyzed binary reaction sequence chemistry. Specifically, the atomic layer films are grown using two half-reactions. Catalysts are used to activate surface species in both half-reactions thereby enabling both half-reactions to be carried out at room temperature.

Inventors

  • 👤 Jason Klaus
  • 👤 Ofer Sneh
  • 👤 Steven M. George

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 01:48
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/455; C23C16/45523; C23C16/45525; C23C16/45527; C23C16/45534; C23C16/22; C23C16/30; C23C16/34; C23C16/345; C23C16/40; C23C16/401; C23C16/402

Claims Analysis

Total Claims: 46
Claim 1
Independent Claim 138 words
A method of growing a film that includes a first element and a second element on a functionalized substrate having a first functional group, the method comprising: carrying out a first half-reaction of a binary reaction sequence by exposing the substrate to a first catalyst and a first molecular precursor comprising the first element of the film bonded to a second functional group resulting in the first element of the first precursor being bonded to the substrate and the first functional group being displaced; and carrying out a second half-reaction of the binary reaction sequence by exposing the first precursor to a second catalyst and a second molecular precursor comprising the second element of the film resulting in the second element of the second precursor being bonded to the first element and the second functional group being displaced.
Claim 2
Independent Claim 138 words
A method of growing a film that includes a first element and a second element on a functionalized substrate having a first functional group, the method comprising: carrying out a first half-reaction of a binary reaction sequence by exposing the substrate to a first catalyst and a first molecular precursor comprising the first element of the film bonded to a second functional group resulting in the first element of the first precursor being bonded to the substrate and the first functional group being displaced; and carrying out a second half-reaction of the binary reaction sequence by exposing the first precursor to a second catalyst and a second molecular precursor comprising the second element of the film resulting in the second element of the second precursor being bonded to the first element and the second functional group being displaced.
Claim 3
Dependent Claim 16 words
The method of claim 1 wherein the first catalyst and the second catalyst are the same.
Claim 4
Dependent Claim 19 words
The method of claim 1 wherein the first half-reaction is carried out at a temperature less than 200° C.
Claim 5
Dependent Claim 19 words
The method of claim 1 wherein the second half-reaction is carried out at a temperature less than 200° C.
Claim 6
Independent Claim 173 words
A method for growing a film on a functionalized substrate, the film comprising a primary element, the functionalized substrate comprising a first functional group, the method comprising the following steps: a. carrying out the following interaction: X.sub.1 F.sub.1 +C→X.sub.1 F.sub.1 . . . C wherein X 1 F 1 is the functionalized substrate and F 1 is the first functional group, and C is a catalyst; b. carrying out the following reaction: X.sub.1 F.sub.1 . . . C+F.sub.2 X.sub.2 F.sub.2 →X.sub.1 X.sub.2 F.sub.2 +C+F.sub.1 F.sub.2 wherein F 2 X 2 F 2 is a first molecular precursor with X 2 being the primary element of the film and F 2 being a second functional group; c. carrying out the following interaction: X.sub.1 X.sub.2 F.sub.2 +C→X.sub.1 X.sub.2 F.sub.2 . . . C; and d. carrying out the following reaction: X.sub.1 X.sub.2 F.sub.2 . . . C+F.sub.1 X.sub.1 F.sub.1 →X.sub.1 X.sub.2 X.sub.1 F.sub.1 +C+F.sub.1 F.sub.2 wherein F 1 X 1 F 1 is a second molecular precursor comprising the first functional group F 1 .
Claim 7
Independent Claim 173 words
A method for growing a film on a functionalized substrate, the film comprising a primary element, the functionalized substrate comprising a first functional group, the method comprising the following steps: a. carrying out the following interaction: X.sub.1 F.sub.1 +C→X.sub.1 F.sub.1 . . . C wherein X 1 F 1 is the functionalized substrate and F 1 is the first functional group, and C is a catalyst; b. carrying out the following reaction: X.sub.1 F.sub.1 . . . C+F.sub.2 X.sub.2 F.sub.2 →X.sub.1 X.sub.2 F.sub.2 +C+F.sub.1 F.sub.2 wherein F 2 X 2 F 2 is a first molecular precursor with X 2 being the primary element of the film and F 2 being a second functional group; c. carrying out the following interaction: X.sub.1 X.sub.2 F.sub.2 +C→X.sub.1 X.sub.2 F.sub.2 . . . C; and d. carrying out the following reaction: X.sub.1 X.sub.2 F.sub.2 . . . C+F.sub.1 X.sub.1 F.sub.1 →X.sub.1 X.sub.2 X.sub.1 F.sub.1 +C+F.sub.1 F.sub.2 wherein F 1 X 1 F 1 is a second molecular precursor comprising the first functional group F 1 .
Claim 8
Dependent Claim 22 words
The method of claim 5 wherein the first functional group F 1 of the functionalized substrate X 1 F 1 is --OH.
Claim 9
Dependent Claim 20 words
The method of claim 6 wherein the second molecular precursor F 1 X 1 F 1 is H 2 O.
Claim 10
Dependent Claim 22 words
The method of claim 6 wherein the second molecular precursor F 1 X 1 F 1 is H 2 O 2 .
Claim 11
Dependent Claim 20 words
The method of claim 5 wherein the first functional group F 1 of the functionalized substrate is --NH 2 .
Claim 12
Dependent Claim 20 words
The method of claim 9 wherein the second molecular precursor F 1 X 1 F 1 is NH 3 .
Claim 13
Dependent Claim 12 words
The method of claim 5 wherein the film is SiO 2 .
Claim 14
Dependent Claim 20 words
The method of claim 5 wherein the first molecular precursor F 2 X 2 F 2 is SiCl 4 .
Claim 15
Dependent Claim 14 words
The method of claim 5 wherein the film is Si 3 N 4 .
Claim 16
Dependent Claim 14 words
The method of claim 5 wherein the catalyst is C 5 H 5 N.
Claim 17
Dependent Claim 19 words
The method of claim 5 wherein the steps are carried out at a temperature of less than 200° C.
Claim 18
Dependent Claim 18 words
The method of claim 5 wherein the steps are carried out at a temperature of about 25° C.
Claim 19
Dependent Claim 34 words
The method of claim 5 further comprising the following steps: e. carrying out the following interaction: X.sub.1 X.sub.2 X.sub.1 F.sub.1 +C→X.sub.1 X.sub.2 X.sub.1 F.sub.1 . . . C; f. repeating steps b through e.
Claim 20
Independent Claim 165 words
A method of growing a film on a functionalized substrate, the film comprising a primary element, the functionalized substrate comprising a first functional group, the method comprising the following steps: a. interacting a catalyst selected from the group consisting of Lewis bases and Lewis acids with the first functional group of the functionalized substrate; b. reacting a first molecular precursor comprising the primary element of the film bonded to a second functional group with the first functional group that is activated by the catalyst resulting in a displacement of the catalyst at the first functional group and a bond between the first molecular precursor and the substrate; c. interacting the catalyst with the second functional group and the primary element of the first molecular precursor; and d. reacting a second molecular precursor comprising the first functional group with the activated second functional group resulting in a displacement of the catalyst and resulting in a bond between the elements of the first and second molecular precursors.
Claim 21
Independent Claim 165 words
A method of growing a film on a functionalized substrate, the film comprising a primary element, the functionalized substrate comprising a first functional group, the method comprising the following steps: a. interacting a catalyst selected from the group consisting of Lewis bases and Lewis acids with the first functional group of the functionalized substrate; b. reacting a first molecular precursor comprising the primary element of the film bonded to a second functional group with the first functional group that is activated by the catalyst resulting in a displacement of the catalyst at the first functional group and a bond between the first molecular precursor and the substrate; c. interacting the catalyst with the second functional group and the primary element of the first molecular precursor; and d. reacting a second molecular precursor comprising the first functional group with the activated second functional group resulting in a displacement of the catalyst and resulting in a bond between the elements of the first and second molecular precursors.
Claim 22
Dependent Claim 16 words
The method of claim 18 wherein the first functional group of the functionalized substrate is --OH.
Claim 23
Dependent Claim 14 words
The method of claim 19 wherein the second molecular precursor is H 2 O.
Claim 24
Dependent Claim 16 words
The method of claim 19 wherein the second molecular precursor is H 2 O 2 .
Claim 25
Dependent Claim 18 words
The method of claim 18 wherein the first functional group of the functionalized substrate is --NH 2 .
Claim 26
Dependent Claim 14 words
The method of claim 22 wherein the second molecular precursor is NH 3 .
Claim 27
Dependent Claim 12 words
The method of claim 18 wherein the film is SiO 2 .
Claim 28
Dependent Claim 14 words
The method of claim 18 wherein the first molecular precursor is SiCl 4 .
Claim 29
Dependent Claim 14 words
The method of claim 18 wherein the film is Si 3 N 4 .
Claim 30
Dependent Claim 14 words
The method of claim 18 wherein the catalyst is C 5 H 5 N.
Claim 31
Dependent Claim 19 words
The method of claim 18 wherein the steps are carried out at a temperature of less than 200° C.
Claim 32
Dependent Claim 18 words
The method of claim 18 wherein the steps are carried out at a temperature of about 25° C.
Claim 33
Dependent Claim 36 words
The method of claim 18 further comprising the following steps: e. interacting the catalyst with the first functional group bonded to a primary element of the first molecular precursor; and f. repeating steps b through e.
Claim 34
Dependent Claim 12 words
The method of claim 18 wherein the catalyst is a Lewis base.
Claim 35
Dependent Claim 12 words
The method of claim 18 wherein the catalyst is a Lewis acid.
Claim 36
Independent Claim 165 words
The method for growing a film on a substrate, the film comprising a primary element, the substrate comprising a first functional group, the method comprising the following steps: a. providing the substrate in a vacuum chamber at a temperature of less than 200° C.; b. introducing a catalyst chosen from the group consisting of Lewis bases and Lewis acids and a first molecular precursor comprising the primary element of the film bonded to a second functional group, into the chamber, causing a reaction at the first functional group of the substrate resulting in a reaction between the first molecular precursor and the first functional group of the substrate; c. evacuating the chamber; d. introducing additional catalyst and a second molecular precursor comprising the first functional group into the chamber, causing a reaction between the second functional group and the second molecular precursor resulting in a displacement of the second functional group and a bond between the primary elements of the first and second molecular precursors.
Claim 37
Independent Claim 165 words
The method for growing a film on a substrate, the film comprising a primary element, the substrate comprising a first functional group, the method comprising the following steps: a. providing the substrate in a vacuum chamber at a temperature of less than 200° C.; b. introducing a catalyst chosen from the group consisting of Lewis bases and Lewis acids and a first molecular precursor comprising the primary element of the film bonded to a second functional group, into the chamber, causing a reaction at the first functional group of the substrate resulting in a reaction between the first molecular precursor and the first functional group of the substrate; c. evacuating the chamber; d. introducing additional catalyst and a second molecular precursor comprising the first functional group into the chamber, causing a reaction between the second functional group and the second molecular precursor resulting in a displacement of the second functional group and a bond between the primary elements of the first and second molecular precursors.
Claim 38
Dependent Claim 13 words
The method of claim 33 wherein the chamber is evacuated by being purged.
Claim 39
Dependent Claim 53 words
The method of claim 33 further comprising the following steps: e. After step (d) evacuating the chamber; f. introducing second additional catalyst and additional first molecular precursor into the chamber, causing a reaction between the first functional group and the primary element of the first molecular precursor g. repeating steps c through f.
Claim 40
Dependent Claim 16 words
The method of claim 35 wherein in step (e) the chamber is evacuated by being purged.
Claim 41
Independent Claim 89 words
A method for growing a SiO 2 film on a substrate comprising an --OH functional group, the method comprising the following steps: a. providing the substrate in a vacuum chamber at a temperature of less than 200° C.; b. introducing C 5 H 5 N and SiCl 4 into the chamber; c. evacuating the chamber; d. introducing C 5 H 5 N and a reagent selected from the group consisting of water and hydrogen peroxide into the chamber; e. evacuating the chamber; and f. repeating steps b through e.
Claim 42
Independent Claim 89 words
A method for growing a SiO 2 film on a substrate comprising an --OH functional group, the method comprising the following steps: a. providing the substrate in a vacuum chamber at a temperature of less than 200° C.; b. introducing C 5 H 5 N and SiCl 4 into the chamber; c. evacuating the chamber; d. introducing C 5 H 5 N and a reagent selected from the group consisting of water and hydrogen peroxide into the chamber; e. evacuating the chamber; and f. repeating steps b through e.
Claim 43
Dependent Claim 16 words
The method of claim 37 wherein in step (e) the chamber is evacuated by being purged.
Claim 44
Independent Claim 79 words
A method growing a Si 3 N 4 film on a substrate comprising an --NH 2 functional group, the method comprising the following steps: a. providing the substrate in a vacuum chamber at a temperature of less than 200° C.; b. introducing C 5 H 5 N and SiCl 4 into the chamber; c. evacuating the chamber; d. introducing C 5 H 5 N and ammonia into the chamber; e. evacuating the chamber; f. repeating steps b through e.
Claim 45
Independent Claim 79 words
A method growing a Si 3 N 4 film on a substrate comprising an --NH 2 functional group, the method comprising the following steps: a. providing the substrate in a vacuum chamber at a temperature of less than 200° C.; b. introducing C 5 H 5 N and SiCl 4 into the chamber; c. evacuating the chamber; d. introducing C 5 H 5 N and ammonia into the chamber; e. evacuating the chamber; f. repeating steps b through e.
Claim 46
Dependent Claim 13 words
The method of claim 39 wherein the chamber is evacuated by being purged.

References Cited (Backward Citations)

US5079600A Cited
US5246886A Cited

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