Asea Aktiebolag

Asea Brown Boveri Ab

Tomas Hidman

Christer Ovren

Sture Goransson

A monolithic optocoupler has a semi-insulating substrate and two opto-components (A, B) arranged thereon, between which signals and/or power can be transmitted through optical radiation. In order to suppress interference transferred capacitively and/or resistively between the two components, screening means are arranged on the substrate between the two components. The screening member is produced using the same type of integrated-circuit technique as for the opto-components, and preferably in the same manufacturing step as these components. The screening member is suitably provided with connection means for its grounding.

Monolithic optocoupler with electrically conducting layer for diverting

A semiconductor component for electrical generation of optical radiation, for example an LED, is provided. The component includes a semiconductor body that contains a first region of material of a first conductivity, a second region of material of a second conductivity type adjacent to the first region; and a PN junction between these regions. The first region has a central part of a material with a first band gap and a peripheral part laterally surrounding the central part of the first region. The material of the peripheral part has a band gap larger than the bang gap of the central part of the first region. The material of the second region has a larger band gap than the band gap of the central part of the first region.

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Vaster.ang.s, Sweden

Tomas Hidman