3-5 Power Electronics Gmbh

Azur Space Solar Power Gmbh

Jens Kowalsky

Volker Dudek

Riteshkumar Bhojani

Daniel Fuhrmann

Thorsten Wierzkowski

Packaged semiconductor device having a heat sink, wherein the heat sink has a top, a bottom, lateral surfaces that connect the top to the bottom, and, extending within the heat sink, a cooling structure with an inlet line as well as an outlet line for a cooling medium, and is composed of an electrically conductive material with a first coefficient of thermal expansion at the top and with a second coefficient of thermal expansion at the bottom, a die is arranged on each of the top and the bottom of the heat sink and is connected to the heat sink in an electrically conductive manner, the coefficients of thermal expansion of the top and of the bottom of the heat sink correspond in each case to the coefficient of thermal expansion of the die arranged thereon or differ from the coefficient of thermal expansion of the die arranged thereon by at most 10% or by at most 20%.

Packaged semiconductor device

A semiconductor having a n-doped cathode layer, a p-doped anode layer, and a drift region, arranged between the cathode layer and the anode layer, with a dopant concentration of at most 8&#xb7;10cm. The drift region has a lightly n-doped drift layer and a lightly p-doped drift layer, arranged between the n-doped drift layer and the anode layer, both drift layers each have a layer thickness of at least 5 &#x3bc;m. The cathode layer has a first section with a dopant concentration of at least 1&#xb7;10cmand a second section, arranged between the first section and the drift region, the second section has a layer thickness of at least 1 &#x3bc;m and a dopant concentration gradient that increases in the direction of the first section up to a dopant concentration maximum. The dopant concentration maximum is smaller or equal to the dopant concentration of the first section.

Stacked III-V semiconductor diode

A stacked III-V semiconductor diode comprising or consisting of GaAs, with a heavily n-doped cathode layer, a heavily p-doped anode layer, and a drift region arranged between the cathode layer and the anode layer with a dopant concentration of at most 8&#xb7;10cm, and a layer thickness of at least 10 &#x3bc;m, wherein the cathode layer has a delta layer section with a layer thickness of 0.1 &#x3bc;m to 2 &#x3bc;m and a dopant concentration of at least 1&#xb7;10cm.

A stacked III-V semiconductor diode comprising or consisting of GaAs with a highly n-doped cathode layer, a highly p-doped anode layer and a drift region arranged between the cathode layer and the anode layer, wherein the drift region has a low n-doped drift layer and a low p-doped drift layer, the n-doped drift layer is arranged between the p-doped drift layer and the cathode layer, both drift layers each have a layer thickness of at least 5 &#x3bc;m and, along the respective layer thickness, have a dopant concentration maximum of not more than 8&#xb7;10cm, the dopant concentration maxima of the two drift layers have a ratio of 0.1 to 10 to each other and a ratio of the layer thickness of the n-doped drift layer to the layer thickness of the p-doped drift layer is between 0.5 and 3.

Growing community of inventors

Storkow, Germany

Jens Kowalsky