Robert Boschgmbh

Ciba Specialty Chemicals Corporation

Werner Pfander

Irene Jennrich

Richard Spitz

Werner Hollstein

Hans-Joachim Seidel

Werner Herden

Erich Zabler

Klaus Heyer

Heiko Gruner

Klaus Heyke

Hans Neu

Kristian Leo

Anton Frenznick

Bernhard Just

Dittmar Kleemann

Karl-Otto Linn

Siegfried Schuler

Hans-Martin Hochenberger

Walter Gritschmeier

Claus-Dietrich Pilch

Wilhelm Post

Hans Wuerth

Hans-Jurgen Herderich

Uwe Kohler

Eugen Krauss

Armin Vohr

Juergen Leinhos

Hans-Juergen Kessler

Klaus Eilert

Uwe Kroeger

Ewald Trankle

Juergen Seeliger

Juergen Soellick

Gerda Wurth Nee Eurich

Uwe Koehler

Rolf Grebenstein

Epoxy resin casting compositions comprising

Electrical or electronic components encapsulated with liquid epoxy

Use of silicone-modified epoxy resins as sealing compound

Liquid epoxy resin composition containing wollastonite and calcite

Pole core

Sensor, in particular RPM sensor

An encapsulating resin composition for electrical and electronic components consists of cycloaliphatic epoxy resin, a hardener, an accelerator, a filler and, sometimes, a pigment. As a result of the combination of the cycloaliphatic epoxy resin with the provision of methylnadic anhydride as hardener and amporhous SiO.sub.2 as a filler, the material is capable of flowing at room temperature, is physiologically harmless and also otherwise well suited for mass production of a wide variety of electrical and electronic components, for example diodes and other semi-conductors for the motor vehicle industry. A small addition of hollow glass spherical particles counteracts sedimentation of amorphous SiO.sub.2 in pre-hardening storage of the resin.

Epoxy resin composition for encapsulating electric circuit components

Electrical connection system

A meander-shaped layer of nickel is deposited by evaporation on a ceramic wafer over an intermediate layer of tantalum serving to improve adhesion, and covered by a protective coating of silicon or epoxy resin is used as a temperature sensor in the intake pipe of a supercharged internal combustion engine. The low mass of the sensor element thus provided enables the resistance of the nickel path to follow rapidly, by its variation, the variations of temperature of the intake air. The sensor has a casing made up of two parts, the lower one of which has two connection prongs molded into it, the ends of which are flattened into tabs that are soldered to contact areas of the ceramic wafer. The upper casing portion has a cavity for the ceramic wafer, the lower part of which is filled with a potting compound to protect the solder joints. The width of the nickel paths that provide the temperature sensitive resistance is about 50 .mu.m and the thickness is from 0.2 to 1 .mu.m and the resistance may be typically 1000 ohms.

Rapid acting gas temperature sensor

Growing community of inventors

Fellbach, Germany

Werner Pfander