# US 5,349,203 A · Organic electric-field switching device

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- Number: US 5,349,203 A
- Document ID: US5349203A
- Status: Granted
- Kind: A
- Application number: 07/963,139
- Filed: 1992-10-19
- Granted: 1994-09-20
- Earliest claimed: 1991-12-09
- Assignees: Mitsubishi Denki Kabushiki Kaisha
- Inventors: Yoshio Hanazato; Satoru Isoda; Satoshi Ueyama; Satoshi Nishikawa
- Web page: https://patentgrep.com/patent/US5349203A

## CPC

- H10K 10/701: {Organic molecular electronic devices}
- B82Y 10/00: Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
- H10K 10/462: {Insulated gate field-effect transistors [IGFETs]}
- H10K 10/464: {Lateral top-gate IGFETs comprising only a single gate}
- H10K 85/701: {Langmuir Blodgett films}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

An organic electric-field switching device has transparent or semitransparent upper electrodes and second insulating film so as to bias an electric field on a hetero-junction membrane formed on a lower electrode, in which the doping speed of a carrier is fast, and the switching device can be operated as the solid-state device and can be easily formed on a semiconductor made of silicon and the like. Therefore, the degree of integration of the device can be rapidly increased due to its multilayered structure.

## Claims

### Claim 1

An organic field switching device comprising:
a lower electrode;
a first insulation film formed locally on said lower electrode;
an organic hetero-junction membrane formed on said first insulating film and said electrode;
a second insulating and transparent or semitransparent film formed on said hetero-junction membrane;
a source electrode formed on said hetero-junction membrane, penetrating said second insulating film;
a drain electrode formed on said hetero-junction membrane, penetrating said second insulating film; and
a transparent or semitransparent upper electrode formed on said second insulating film.

### Claim 2 (depends on 1)

A device as defined in claim 1 wherein said hereto-junction membrane comprises a plurality of molecular films having different redox potentials.

### Claim 3 (depends on 1)

A device as defined in claim 1 wherein said upper electrode is provided between said source electrode and said drain electrode.

### Claim 4 (depends on 1)

A device as defined in claim 1 wherein a plurality of said upper electrodes are juxtaposed in a row substantially parallel to said source and drain electrodes therebetween.

### Claim 5 (depends on 1)

A device as defined in claim 1 wherein said upper electrodes are juxtaposed in a row substantially series to said source and drain electrodes therebetween.

### Claim 6 (depends on 1)

A device as defined in claim 1 wherein a plurality of said upper electrodes are juxtaposed in a matrix form between said source and drain electrodes.

### Claim 7

An organic electric-field switching device comprising:
a lower electrode;
a first insulation film formed locally on said lower electrode;
an organic hereto-junction membrane formed on said first insulating film and said lower electrode;
a second insulating film formed on said hetero-junction membrane;
a source electrode formed on said hetero-junction membrane, penetrating said second insulating film;
a drain electrode formed on said hereto-junction membrane, penetrating said second insulating film; and
an upper electrode formed on said second insulating film.

### Claim 8 (depends on 7)

A device as defined in claim 7 wherein said hetero-junction membrane comprises a plurality of molecular films having different redox potentials.

### Claim 9 (depends on 7)

A device as defined in claim 7 wherein said upper electrode is provided between said source electrode and said drain electrode.

### Claim 10 (depends on 7)

A device as defined in claim 7 wherein a plurality of said upper electrodes are juxtaposed in a row substantially parallel to said source and drain electrodes therebetween.

### Claim 11 (depends on 2)

A device as defined in claim 2 wherein said plurality of molecular films include a plurality of Langmuir-Blodgett laminated films.

### Claim 12 (depends on 8)

A device as defined in claim 8 wherein said plurality of molecular films include a plurality of Langmuir-Blodgett laminated films.