E.i. Dupont De Nemours and Company

Sebastian Vito Mastrangelo

James B Ganci

Jerry Allen Nelson

John Charles Harden

An electric current regulating junction that can be electrically activated to a low resistance state in which it is capable of passing a relatively low reading current. The junction is capable of being activated electrically so as to be switched between low resistance and relatively high resistance states and vice versa. To switch from the low resistance to the high resistance state, one may apply relatively low currents (at least 10 times the magnitude of the reading current) in the form of a current-limited pulse, the pulse being regulated so that it will decay rapidly at the end. The junction comprises a normally insulative, electrically activatable composition having an electrical resistance greater than 10.sup.8 ohms through a layer 0.1-2,540 microns thick. The composition consists essentially of 10 to 90 volume percent of a substantially linear, unitary polymeric binder, and 10 to 90 volume percent of particles substantially homogeneously dispersed in the binder having an electrically conductive metallic interior and a thin insulative surface coating sufficient to impart contact resistance. The unitary polymer has a glass transition temperature of at least 100.degree. C. and may be an aromatic polyimide, poly(amide-imide), poly(ester-imide) or polyamide.

Insulative composition for forming polymeric electric current regulating

Elastic resistor compositions comprising metallic-conductive particles and solid conductive lubricant particles codistributed in a matrix of a curable, elastomer-forming polymer and the cured compositions formed therefrom. Elastic resistors made from said compositions are also disclosed.

Elastic resistor compositions containing metallic-conductive particles

Electrically conductive adhesive composition consisting essentially of polymeric binder, for example, 'bouncing putty,' conductive particles having at least their surfaces constituted by a noble metal and a normally liquid polyhydric alcohol, for example, glycerol.

Electrically conductive adhesive composition

Pressure-sensitive compositions adaptable for use as elastic resistors over a wide pressure range, useful as keyboard switches or vehicle-crash sensors, comprising hard, metallic-conductive particles insulatively distributed in elastomer.

Pressure-sensitive elastic resistor compositions

A diode-forming layered structure comprising a semiconductor body having a layered coating thereon, said semiconductor having a surface region of given conductivity type, said coating being a dispersed metal particle-polymer coating which before electrical activation displays a high electrical resistance but after electrical activation is highly conductive, said electrical activation resulting in the formation of a diode in the zone of contact between the coating and the semiconductor body, a plurality of such layered structures, in a two-dimensional array based on a common semiconductor body, being useful in the formation of a read-only memory (ROM), an alterable read-only memory (AROM) or a random access memory (RAM).

Structure capable of forming a diode and associated conductive path

Disclosed herein is a method for making an electrically conductive rigid cellular structure which comprises (i) coating the exposed surface of a porous, heat or solvent-removable substrate with a mixture of aluminum powder and titanate ester, (ii) decomposing the titanate ester of the mixture to effect cohesive binding of the coating, (iii) removing the substrate, and (iv) heating the remaining structure to develop electrical conductivity.

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Hockessin, DE, United States of America

Sebastian Vito Mastrangelo