Bbc Brown, Boveri & Company, Limited

Abb Schweiz Ag

Asea Brown Boveri Ag

Abb Schweiz Holding Ag

Hans-Rudolf Zeller

Thomas Lang

Claus Schuler

Friedhelm Bauer

Jiri Dlouhy

Fritz Lehmann

Peter Bruesch

An IGBT is specified which can be produced in a simple manner yet can be turned on homogeneously. For this purpose, gate fingers are dispensed with and the gate current in the IGBT-Chip is forwarded, proceeding from the gate terminal, directly via the polysilicon layers of the gate electrodes to the IGBT standard cells.

Bipolar transistor with an insulated gate electrode

In an IGBT module which is made contact with by pressure and comprises a plurality of individual chips ( ) connected in parallel, an additional layer ( ) facilitates a stable short circuit. The layer ( ), as a foil, as a paste or as a component of the solder, is brought into contact with the main electrodes ( ) of the semiconductor chip ( ). The layer ( ) contains, for example, Ag and, together with the semiconductor material, forms a eutectic mixture whose melting point is below that of the two partner materials.

Short-circuit-resistant IGBT module

A high-power semiconductor module having a casing which encloses at least one semiconductor element has an explosion protection element. This explosion protection element is a protective sheath which surrounds at least a portion of the casing and traps fragments which are projected outward in the event of an explosion of the semiconductor element. This prevents people from being injured or adjacent modules from being damaged by such fragments.

Explosion protection for semiconductor modules

An improved electrochromic display device and a method of manufacturing it are disclosed. The improved device includes at least one layer of light absorbing and/or light reflecting fabric as a contrast enhancing adjuvant in the electrolyte of the device. According to the method of the invention a transparent support, at least one layer of fabric and a counter-electrode are assembled in laminated form and sealed together by an adhesive applied at the edges of the assembled structure.

Electrochromic display device with a contrast-enhancing adjuvant and

An improved electrochromic display device and a method of making it are disclosed. The display device includes a proton free substance used as the electrolyte which increases the lifetime of the display, even at high switching voltages. The disclosed method includes the initial dehydration of the electrolyte material and the subsequent addition of a drying agent to it.

Electrochromic display device with electrolytes and a method of

A controllable electrochromic indicator device is disclosed which includes two electrodes, an electrochromic layer and an adjacent charge-carrier-transmitting insulator layer situated between the two electrodes and at least one of the electrodes being deposited on a supporting plate and at least one of the electrodes being transparent. The charge carrier transmitting insulator layer is a good ion conductor and functions to almost completely block the flow of electrons. At least one of the electrodes is non-polarizable and is disposed in direct contact with the ion conductor.

Growing community of inventors

Birr, Switzerland

Hans-Rudolf Zeller