U.S. Philips Corporation

Marc A Monneraye

Michel J Monnier

Hugues Baudry

Claude Foucher

Claude Morhaim

Pierre Le Marchant

Hughes Baudry

Glass-ceramic heating element comprising at least a flat electric heating member which is provided on a glass-ceramic plate and can be heated to a temperature between ambient temperature and approximately 650.degree. C. forming a heat source, wherein the electric heating member is produced by depositing screen-printed layers on the surface denoted the lower surface to distinguish it from the working surface of the glass-ceramic plate, these layers having a coefficient of expansion near that of the glass-ceramic material at elevated temperatures and being capable of being heated by thermal dissipation to temperatures of about 650.degree. C., and wherein the heating member is formed from this lower surface by a first layer 21 of a material constituting an electric insulator at high tempertures, a second layer 22 of a conductive material to form the two current supply lines C.sub.1 and C.sub.2 for the input and the output of the heating member and a third layer 23 of a dielectric material to constitute a heating resistor R, arranged between the lines C.sub.1 and C.sub.2 in the form of a circuit of such a design that it can uniformly distribute the heat over the overall heat source surface. The heating element is suitable for use in hot plates, kitchen ranges and ovens.

Glass-ceramic heating element

The invention relates to a silk screen printing paste which is provided according to the thick-layer technique and is to be fired in a non-oxidizing atmosphere and which comprises a mixture of a vitreous passive component and a permanent binder, an active component and a temporary binder, characterized in that it also comprises one or more lead oxide(s) having a degree of oxidation higher than 2 in a quantity below 20% by volume. The invention also relates to hybrid circuits manufactured by means of said paste. Application: hybrid micro-circuits.

Silk screen printing paste with lead glass which is to be fired in a

A portable identifying element has the general shape of a laminated credit card, and comprises a front sheet (6), a central sheet (1) and a rear sheet (6'), all of plastic material. An active electronic circuit (3) is positioned within a cavity (2) of the central sheet. A thin layer of copper (7) is juxtaposed with the electronic circuit between the front sheet and rear sheet for removing heat dissipated within the circuit.

Portable, identifying element constructed as a lamination of sheets

Method of providing metal bumps on an apertured substrate and substrate having metal bumps.

Method of providing metal bumps on an apertured substrate

A method for manufacturing a lead-through of a metal element consisting of a fernico alloy through a component of ceramic material. A suspension is supplied of glass powder having molar percentage compositions within defined limits. The suspension is deposited on the ceramic material at the area of the lead-through and the assembly is heated for several minutes in an nitrogen atmosphere at a temperature near 1000.degree. C. followed by cooling of the assembly to room temperature.

Method of manufacturing a lead-through of a metal element through a

A dielectric composition which may be used as an insulating silk-screening paste and is compatible with a copper-containing conductive silk-screened layer, such as used in multilayer circuit boards. The paste includes an organic carrier, a mixture of aluminum oxide, and one or more types of glass of the 'short' type, of which at least one glass can be devitrified by dissolution of the aluminum oxide.

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Aubervilliers, France

Marc A Monneraye