← Back to Patent Explorer
US4721601A Expired / Lapsed US ⏱️ 0.0 years remaining

Molecule-based microelectronic devices

Assignee: Massachusetts Institute of Technology
•
Filing: 1984-11-23
•
Granted: 1988-01-26
•
Expires: 2004-11-23
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Several types of new microelectronic devices including diodes, transistors, sensors, surface energy storage elements, and light-emitting devices are disclosed. The properties of these devices can be controlled by molecular-level changes in electroactive polymer components. These polymer components are formed from electrochemically polymerizable material whose physical properties change in response to chemical changes, and can be used to bring about an electrical connection between two or more closely spaced microelectrodes. Examples of such materials include polypyrrole, polyaniline, and polythiophene, which respond to changes in redox potential. Each electrode can be individually addressed and characterized electrochemically by controlling the amount and chemical composition of the functionalizing polymer. Sensitivity of the devices may be increased by decreasing separations between electrodes as well as altering the chemical environment of the electrode-confined polymer. These very small, specific, sensitive devices provide means for interfacing electrical and chemical systems while consuming very little power.

Inventors

  • 👤 Mark S. Wrighton
  • 👤 Henry S. White, Jr.
  • 👤 Gregg P. Kittlesen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 12:57
CPC Classifications
B; B82; B82Y; B82Y10/00; G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/129; G01N27/26; G01N27/403; G01N27/414; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/1533; G11; G11C; G11C13/00; G11C13/0002; G11C13/0009; G11C13/0014; G11C13/0016; H; H01; H01G; H01G7/00; H10; H10K; H10K10/00; H10K10/20; H10K10/26; H10K10/40; H10K10/46; H10K10/701; H10K85/00; H10K85/10; H10K85/111; H10K85/30; G01N27/416; G01N27/48; H10K71/00; H10K71/10; H10K71/12; H10K71/125; Y; Y10; Y10S; Y10S977/00; Y10S977/902; Y10S977/932; Y10S977/936

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 61 words
A microelectronic device comprising at least two electrically conductive electrodes, separated by less than two microns and on an insulating substrate overlaid with at least one electroactive polymer, wherein said device is responsive to a signal that changes the state of charge of the electronic polymer which results in a net change in the concentration of ionic species in said polymer.
Claim 2
Dependent Claim 61 words
A microelectronic device comprising at least two electrically conductive electrodes, separated by less than two microns and on an insulating substrate overlaid with at least one electroactive polymer, wherein said device is responsive to a signal that changes the state of charge of the electronic polymer which results in a net change in the concentration of ionic species in said polymer.
Claim 3
Dependent Claim 24 words
The device of claim 1 wherein said electrodes are conductive electrochemically inert metals selected from the group consisting of gold, silver, palladium, and platinum.
Claim 4
Dependent Claim 20 words
The device of claim 1 wherein said substrate is selected from the group consisting of silicon dioxide, glass and sapphire.
Claim 5
Dependent Claim 23 words
The device of claim 1 wherein said polymer is derivatized with a material selected from the group consisting of metals, enzymes, and ionophores.
Claim 6
Dependent Claim 26 words
The device of claim 1 comprising at least two electrically conductive microelectrodes separated by less than two microns, wherein said polymer is polymerized from electrochemiluminescent monomers.
Claim 7
Dependent Claim 11 words
The device of claim 1 further comprising a macroscopic indicator electrode.
Claim 8
Dependent Claim 26 words
The device of claim 1 wherein said polymer is polymerized for monomers which are selected from the group consisting of electrochemically polymerizable monomers and photopolymerizable monomers.
Claim 9
Dependent Claim 35 words
The device of claim 7 wherein said polymer is polymerized from monomers selected from the group consisting of pyrrole; N-Methylpyrrole; aniline; vinylferrocene; styrene; nitrostyrene; viologens; vinyl-pyridine; vinyl-2,2'-bipyridine; vinyl-rubrene; quinone-based compounds; and derivatives of said monomers.
Claim 10
Dependent Claim 22 words
The device of claim 1 wherein said polymer reversibly responds to a chemical signal in a way which can be electrically detected.
Claim 11
Dependent Claim 14 words
The device of claim 9 wherein said chemical signal is a change in pH.
Claim 12
Dependent Claim 25 words
The device of claim 9 wherein said chemical signal results from the interaction of said polymer with a component in the medium surrounding the device.
Claim 13
Dependent Claim 24 words
The device of claim 9 wherein said polymer is derivatized with palladium and said derivatized polymer responds to a change in concentration of oxygen.
Claim 14
Dependent Claim 24 words
The device of claim 9 wherein said polymer is derivatized with platinum and said derivatized polymer responds to a change in concentration of hydrogen.

References Cited (Backward Citations)

US3999122A Cited
US4350660A Cited
US4444892A Cited
US4442422A Cited
US4461691A Cited
US4571543A Cited
US4560534A Cited
US4557978A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-01-25 1991-07-27 1992-01-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-01-25 1995-07-27 1996-01-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-01-25 1999-07-27 2000-01-26 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag