US4652894A
Expired / Lapsed
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Electrical organic thin film switching device switching between detectably different oxidation states
Assignee: Johns Hopkins University
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Filing: 1985-01-15
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Granted: 1987-03-24
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Expires: 2005-01-15
Abstract
Abstract A current-controlled, bistable threshold or memory switch comprises a polycrystalline metal-organic semiconductor sandwiched between netallic electrodes. Films of either copper or silver complexed with TNAP, DDQ, TCNE, TCNQ, derivative TCNQ molecules, or other such electron acceptors provide switching between high and low impedance states with combined delay and switching times on the order of 1 nanosecond. Switching behavior of a complex of the present invention is related to the reduction potential of the acceptor molecule.
Inventors
- 👤 Richard S. Potember
- 👤 Theodore O. Poehler, Jr.
- 👤 Dwaine O. Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:38
CPC Classifications
B; B82; B82Y; B82Y10/00; G; G11; G11C; G11C13/00; G11C13/0002; G11C13/0009; G11C13/0014; H; H10; H10K; H10K10/00; H10K85/00; H10K85/60; H10K85/611
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
89 words
A field induced switching apparatus comprising: a solid-state organic semiconductor, said organic semiconductor comprising a metal complexed with an organic electron acceptor selected from the group consisting of TCNQ, TCNQ derivatives, TCNE, TNAP and DDQ. forming a metal charge-transfer salt; an electric field applied to the surface of said organic semiconductor, said field being sufficient to induce a solid state reversible electrochemical reaction in said organic semiconductor, causing at least a portion of said organic electron acceptor to switch from a first oxidation state to a second oxidation state.
Claim 2
Dependent Claim
89 words
A field induced switching apparatus comprising: a solid-state organic semiconductor, said organic semiconductor comprising a metal complexed with an organic electron acceptor selected from the group consisting of TCNQ, TCNQ derivatives, TCNE, TNAP and DDQ. forming a metal charge-transfer salt; an electric field applied to the surface of said organic semiconductor, said field being sufficient to induce a solid state reversible electrochemical reaction in said organic semiconductor, causing at least a portion of said organic electron acceptor to switch from a first oxidation state to a second oxidation state.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1, wherein said organic electron acceptor in said first oxidation state has at least one detectably different property from said organic electron acceptor in said second oxidation state.
Claim 4
Dependent Claim
21 words
The apparatus of claim 2, wherein said first oxidation state has an electrical impedance detectably different from said second oxidation state.
Claim 5
Dependent Claim
38 words
The apparatus of claim 2, wherein said organic electron acceptor is chosen from a class of weak electron acceptors having a low reduction potential thereby providing threshold switching from said first oxidation state to said second oxidation state.
Claim 6
Dependent Claim
38 words
The apparatus of claim 2, wherein said organic electron acceptor is chosen from a class of strong electron acceptors having a high reduction potential thereby providing memory switching from said first oxidation state to said second oxidation state.
Claim 7
Dependent Claim
18 words
The apparatus of claim 2, wherein said metal is selected from the group consisting of silver and copper.
Claim 8
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ.
Claim 9
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TNAP.
Claim 10
Dependent Claim
14 words
The apparatus of claim 2, wherein said organic electron acceptor is a TCNQ derivative.
Claim 11
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OMe).
Claim 12
Dependent Claim
14 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OMe) 2 .
Claim 13
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OMe)(OEt).
Claim 14
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OMe)(O-i-Pr).
Claim 15
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OMe)(O-i-Bu).
Claim 16
Dependent Claim
16 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OMe)(O-i-C 2 H 5 ).
Claim 17
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OEt)(SMe).
Claim 18
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQCl.
Claim 19
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQBr.
Claim 20
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQClMe.
Claim 21
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQBrMe.
Claim 22
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQIMe.
Claim 23
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQI.
Claim 24
Dependent Claim
16 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(OMe)(OCH 3 ) 2 .
Claim 25
Dependent Claim
14 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(CN) 2 .
Claim 26
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(Me).
Claim 27
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(Et).
Claim 28
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(i-Pr).
Claim 29
Dependent Claim
14 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNQ(i-Pr) 2 .
Claim 30
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is TCNE.
Claim 31
Dependent Claim
12 words
The apparatus of claim 2, wherein said organic electron acceptor is DDQ.
References Cited (Backward Citations)
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