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US5284779A
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Method of forming organic charge-transfer thin films
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1992-07-20
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Granted: 1994-02-08
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Expires: 2012-07-20
Abstract
Abstract Superconducting or conducting organic charge-transfer complex film is epitaxially grown on a substrate which has been given an oriented surface by applying a stearic acid film. The periodic charge distribution over the oriented surface regulates the formation of the complex film to arrange the molecules along a common axis. The alignment of the molecules in the complex film helps to have superconductivity or high conductivities.
Inventors
- 👤 Akiharu Miyanaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:23
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/121; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/851; Y; Y10; Y10S; Y10S438/00; Y10S438/939
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
50 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by Langmuir-Blogett's technique; forming a charge-transfer organic film on said buffer film by vapor depositions wherein said buffer film is stearic acid metallic salt.
Claim 2
Independent Claim
50 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by Langmuir-Blogett's technique; forming a charge-transfer organic film on said buffer film by vapor depositions wherein said buffer film is stearic acid metallic salt.
Claim 3
Dependent Claim
19 words
A method for forming an organic film of claim 1 wherein said organic film is selected to possess superconductivity.
Claim 4
Dependent Claim
25 words
A method for forming an organic film of claim 1 wherein said organic buffer film is made from stearic acid and/or stearic acid metallic salt.
Claim 5
Dependent Claim
21 words
A method for forming an organic film of claim 1 wherein said charge-transfer film is a (BEDT-TTF) 2 I 3 film.
Claim 6
Dependent Claim
31 words
A method for forming an organic film of claim 1 wherein said charge-transfer organic film is formed by evaporating a charge-transfer source at a temperature from 250° C. to 300° C.
Claim 7
Dependent Claim
23 words
A method for forming an organic film of claim 4 wherein a temperature of said substrate is from room temperature to 50° C.
Claim 8
Dependent Claim
31 words
A method for forming an organic film of claim 1 wherein a solution of said stearic acid prepared at a pH from 6 to 7 is used for said Langmuir-Blodgett's technique.
Claim 9
Dependent Claim
38 words
A method for forming an organic film of claim 1 wherein said stearic acid film forming step is repeated in order to laminate said stearic acid film in the form of a multi-layer comprising stearic acid monomolecular layers.
Claim 10
Dependent Claim
20 words
A method for forming an organic film of claim 1 further comprising a step of pressing said charge-transfer organic film.
Claim 11
Dependent Claim
25 words
A method for forming an organic film of claim 1 wherein said charge-transfer film is (BEDT-TTF) 2 Cu(SCN) 2 or (TMTSF) 2 ClO 4 .
Claim 12
Independent Claim
50 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by vapor deposition; forming a charge-transfer organic film on said buffer film by vapor deposition wherein said buffer film is stearic acid metallic salt.
Claim 13
Independent Claim
50 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by vapor deposition; forming a charge-transfer organic film on said buffer film by vapor deposition wherein said buffer film is stearic acid metallic salt.
Claim 14
Dependent Claim
20 words
A method for forming an organic film of claim 11 wherein said charge-transfer film is (BEDT-TTF) 2 I 3 .
Claim 15
Dependent Claim
31 words
A method for forming an organic film of claim 11 wherein said charge-transfer organic film is formed by evaporating a charge-transfer source at a temperature from 250° C. to 350° C.
Claim 16
Dependent Claim
23 words
A method for forming an organic film of claim 11 wherein a temperature of said substrate is from room temperature to 50° C.
Claim 17
Dependent Claim
19 words
A method for forming an organic film of claim 11 further comprising a step of pressing said charge-transfer film.
Claim 18
Dependent Claim
25 words
A method for forming an organic film of claim 11 wherein said charge-transfer film is (BEDT-TTF) 2 Cu(SCN) 2 or (TMTSF) 2 ClO 4 .
Claim 19
Dependent Claim
43 words
A method for forming an organic film of claim 3 wherein said stearic acid and/or stearic acid metallic salt film has a molecular arrangement that stearic acid and/or stearic acid metallic salt molecules are oriented substantially in a direction perpendicular to said substrate.
Claim 20
Dependent Claim
43 words
A method for forming an organic film of claim 3 wherein said stearic acid and/or stearic acid metallic salt film has a molecular arrangement that stearic acid and/or stearic acid metallic salt molecules are oriented substantially in a direction parallel to said substrate.
Claim 21
Independent Claim
83 words
A method for forming a superlattice film comprising the steps of: forming an organic buffer film on a substrate with an oriented surface wherein said buffer layer is stearic acid metallic salt; forming a superlattice film on said organic buffer film, said superlattice film being a multi-layer comprising one or more organic neutral planar molecule layers and one or more metallic layers formed alternatively with one of said one or more organic neutral planar molecule layers formed directly on said organic buffer film.
Claim 22
Independent Claim
83 words
A method for forming a superlattice film comprising the steps of: forming an organic buffer film on a substrate with an oriented surface wherein said buffer layer is stearic acid metallic salt; forming a superlattice film on said organic buffer film, said superlattice film being a multi-layer comprising one or more organic neutral planar molecule layers and one or more metallic layers formed alternatively with one of said one or more organic neutral planar molecule layers formed directly on said organic buffer film.
Claim 23
Dependent Claim
24 words
A method for forming a superlattice film of claim 19 wherein said one or more metallic layers are comprised of a common metallic element.
Claim 24
Dependent Claim
20 words
A method for forming a superlattice film of claim 20 wherein said common metallic element is aluminum, indium, or gold.
Claim 25
Dependent Claim
29 words
A method for forming a superlattice film of claim 19 wherein said one or more organic neutral planar molecule layers are multi-layers comprising organic neutral planar monomolecular layers, respectively.
Claim 26
Dependent Claim
45 words
A method for forming a superlattice film of claim 22 wherein said one or more organic neutral planar molecule layers are comprised of a common molecule selected from the group consisting of TCNQ, TCNQ derivatives, TMTTF, TMTSF, TNAP, TTF, TTF derivatives, NMP, HMTTF, and DMPTTF.
Claim 27
Dependent Claim
30 words
A method for forming an organic superconducting film of claim 3 wherein said stearic acid metallic salt film is a (CH 3 (CH 2 ) 16 COO) 2 Ca film.
Claim 28
Dependent Claim
19 words
A method for forming an organic film of claim 11 wherein said organic film is selected to possess superconductivity.
Claim 29
Dependent Claim
25 words
A method for forming an organic film of claim 11 wherein said organic buffer film is made from stearic acid and/or stearic acid metallic salt.
Claim 30
Dependent Claim
43 words
A method for forming an organic film of claim 26 wherein said stearic acid and/or stearic acid metallic salt film has a molecular arrangement that stearic acid and/or stearic acid metallic salt molecules are oriented substantially in a direction perpendicular to said substrate.
Claim 31
Dependent Claim
43 words
A method for forming an organic film of claim 26 wherein said stearic acid and/or stearic acid metallic salt film has a molecular arrangement that stearic acid and/or stearic acid metallic salt molecules are oriented substantially in a direction parallel to said substrate.
Claim 32
Dependent Claim
29 words
A method for forming an organic film of claim 26 wherein said stearic acid metallic salt film is a (CH 3 (CH 2 ) 16 COO) 2 Ca film.
Claim 33
Independent Claim
65 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by Langmuir-Blodgett's technique; and forming a charge-transfer organic film on said buffer film by vapor deposition, wherein said organic buffer film has a molecular arrangement in which molecules thereof are oriented substantially in a direction parallel to said substrate.
Claim 34
Independent Claim
65 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by Langmuir-Blodgett's technique; and forming a charge-transfer organic film on said buffer film by vapor deposition, wherein said organic buffer film has a molecular arrangement in which molecules thereof are oriented substantially in a direction parallel to said substrate.
Claim 35
Independent Claim
64 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by vapor deposition; forming a charge-transfer organic film on said buffer film by vapor deposition, wherein said organic buffer film has a molecular arrangement in which molecules thereof are oriented substantially in a direction parallel to said substrate.
Claim 36
Independent Claim
64 words
A method for forming an organic film comprising the steps of: forming an organic buffer film on a substrate with the molecules of said film oriented by vapor deposition; forming a charge-transfer organic film on said buffer film by vapor deposition, wherein said organic buffer film has a molecular arrangement in which molecules thereof are oriented substantially in a direction parallel to said substrate.
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