US 5,198,153 AGranted

Electrically conductive polymeric

AssigneeInternational Business Machines Corporation

InventorsMarie Angelopoulos, Wu-Song Huang, Richard D. Kaplan, Marie-Annick Le Corre, Stanley E. Perreault, Jane M. Shaw, Michel R. Tissier, George F. Walker

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Abstract

Structures containing conducting polymers and methods of fabrication thereof. Electrical conductivity can be induced in polymers selected from the group of substituted and unsubstituted polyanilines, polyparaphenylenvinyles, substituted and unsubstituted polythiophenes substituted and unsubstituted poly-p-phenylene sulfides, substituted polyfuranes, substituted polypyrroles, substituted polyselenophene, polyacetylines formed from soluble precursors, combinations thereof and blends thereof with other polymers. The polymer contains a doping precursor, selected from the group of onium salts, iodonium salts, triflate salts, borate salts and tosylate salts and sulfonoxylimides. Conductivity can be selectively induced in the polymer by selectively doping upon selective exposure to a source of energy such as electromagnetic radiation, an electron beam and heat. The electrically conductive polymers of the present invention are useful as electron discharge layers for electron beam applications, such as, SEM observations, as electromagnetic interference coatings on dielectric surfaces and as electron beam resist which acts as a discharge layer.

Claims16

Dependent claims

A composition of matter comprising:

a polymeric body;
said polymeric body containing a material selected from the group consisting of substituted and unsubstituted polyparaphenylenevinylenes, polyanilines, polyazines, polythiophenes, poly-p-phenylene sulfides, polyfuranes, polypyrroles, polyselenophene, polyacetylenes formed from soluble precursors and combinations thereof;
said polymeric body having electrically conductive regions;
said polymeric body having electrically non-conductive regions;
said electrically conductive regions contain disassociated forms of a dopant precursor selected from the group consisting of onium salts, borate salts, tosylate salts, triflate salts and sulfonyloxyimides, said doping precursor being dissociated into a cationic and anionic species to form said disassociated form;
said disassociated forms of said dopant precursors doping said material to the conductive state;
said material contains molecules having a partially conjugated .pi. system;
said disassociated forms of said dopant being in an amount sufficient for said partially conjugated .pi. system of said molecule to be extended to be adjacent to said partially conjugated .pi. system of an adjacent molecule to induce electrical conductivity in said material;
said conductive regions having a property of being significantly less soluble in organic and aqueous solvents as compared to said electrically non-conductive regions;
said electrically non-conductive regions having a property of being substantially soluble in said organic and aqueous solvents.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/357,565Filed 26 May 1989
Granted: 30 Mar 1993
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H05K 9/0079
Shielding materials: electrostatic discharge protection, e.g. ESD treated surface for rapid dissipation of charges
C08G 61/12
Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule: macromolecular compounds…
H01B 1/127
Intrinsically conductive polymers: comprising five-membered aromatic rings in the main chain, e.g. polypyrroles, polythiophenes
H01B 1/128
Intrinsically conductive polymers: comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes