Disposable biopotential electrode

Claim 1

A disposable, biopotential electrode structure providing improved electrical properties and comprising: a flat, sheet-like flexible base having first and second orthogonal dimensions lying in the plane of, said base, said first orthogonal dimension terminating at a pair of ends, said base having defined thereon an electrode portion for receiving biopotential signals and a connector portion for supplying the signals externally of said electrode structure, said electrode portion and connector portion lying in a generally side by side contiguous relationship on said base along said first orthogonal dimension with said portions at opposite ends of said first orthogonal dimension, said electrode portion having substantially the same dimension as said base along said second orthogonal dimension; electrically conductive carbon material associated with said base in quantitities sufficient to render said electrode portion electrically conducting, said carbon material being associated at least coterminously with said electrode portion; a layer of silver/silver chloride having dimensions at least coterminous with those of said electrode portion, said layer being electrically coupled to said carbon material, said carbon material associated with said base serving to lessen the amount of silver/silver chloride in said layer while enabling the improved electrical properties to be provided in said electrode structure; at least one of said electrically conductive carbon material and silver/silver chloride layer extending into said connector portion; and and an ionically conductive adhesive lying over said silver/silver chloride layer, said adhesive being coextensive with said electrode portion.