METHOD FOR CREATING VOLTAGE SWITCHABLE DIELECTRIC MATERIAL

• US 20100155671A1
• Filed: 02/26/2010
• Published: 06/24/2010
• Est. Priority Date: 07/29/2006
• Status: Abandoned Application

• Current Assignee: Littelfuse Incorporated
• Original Assignee: Littelfuse Incorporated
• Inventors: Fleming, Robert, KOSOWSKY, Lex
• Application Number:
  US12/714,358
• Publication Number:
  US 20100155671A1
• Time in Patent Office: Days
• US Class Current: 252/502
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: H01C 17/0652 containing carbon or carbides
• CPC Class Codes: H01C 17/06586 composed of organic material
• CPC Class Codes: H01C 7/105 Varistor cores H01C7/12 takes precedence
• CPC Class Codes: H05K 1/0257 Overvoltage protection
• CPC Class Codes: H05K 1/0259 Electrostatic discharge [ESD] protection
• CPC Class Codes: H05K 1/0373 containing additives, e.g. fillers H05K1/036 takes precedence
• CPC Class Codes: H05K 2201/0209 Inorganic, non-metallic particles
• CPC Class Codes: H05K 2201/026 Nanotubes or nanowires
• CPC Class Codes: H05K 2201/0281 Conductive fibers
• CPC Class Codes: H05K 2201/0323 Carbon
• CPC Class Codes: H05K 2201/0738 Use of voltage responsive materials, e.g. voltage switchable dielectric or varistor materials

Abstract

One or more embodiments provide for a composition that includes (i) organic material that is conductive or semi-conductive, and (ii) conductor and/or semiconductor particles other than the organic material. The organic material and the conductor and/or semiconductor particles are combined to provide the composition with a characteristic of being (i) dielectric in absence of a voltage that exceeds a characteristic voltage level, and (ii) conductive with application of the voltage exceeding the characteristic voltage level.

Claims

1. A method for creating voltage switchable dielectric material, the method comprising:

creating a mixture containing (i) a binder that is dielectric, (ii) metallic and/or inorganic conductor or semi-conductor particles, and (iii) conductive or semi-conductive organic material that is distributed in the mixture as either a solvent soluble or as nano-scaled particles, wherein creating the mixture includes using a quantity of each of the binder, the metallic and/or inorganic conductor or semi-conductor particles, and the organic material so that the mixture, when cured, is (i) dielectric in absence of a voltage that exceeds a characteristic voltage, and (ii) conductive in presence of the voltage that exceeds the characteristic voltage; and

curing the mixture.

2. The method of claim 1, further comprising applying the mixture to a target location on a device, and wherein curing the mixture includes curing the mixture at the target location.

3. The method of claim 2, creating a mixture includes creating the mixture using fullerenes as the organic material.

4. The method of claim 1, wherein the fullerenes are functionalized C60 or C70.

5. The method of claim 1, wherein the fullerenes are carbon nanotubes.

6. The method of claim 1, wherein the metallic and/or inorganic conductor or semi-conductor particles are selected from a group consisting of copper, aluminum, nickel, and steel, silicon, silicon carbide, boron nitride, aluminum nitride, nickel oxide, zinc oxide, zinc sulfide, bismuth oxide, cerium oxide, iron oxide.

7. The method of claim 1, wherein the metallic and/or inorganic conductor or semi-conductor particles includes a titanium compound.

8. The method of claim 1, wherein the metallic and/or inorganic conductor or semi-conductor particles includes a titanium dioxide.