Reducing Temperature Dependence in Semiconductor Short-Circuit Structures
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Summary
Problems
Conventional semiconductor components with short-circuit structures exhibit significant temperature dependence due to their positive temperature coefficient, which affects the performance of devices like thyristors and IGBTs, necessitating a reduction in temperature dependence.
Innovation solutions
The use of dopants with specific energy levels, such as indium for acceptors and sulfur or selenium for donors, that are only partially ionized at room temperature, increasing ionization as temperature rises, thereby reducing the temperature dependence of the short-circuit structures by altering the hole and electron injection rates.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If conventional dopants are used in short-circuit structures, then the forward current increases with temperature (positive temperature coefficient), but this causes significant temperature dependency that affects device performance
Why choose this principle:
The patent changes the energy level parameter of the dopant atoms in the short-circuit structure. By using dopants with higher energy levels (e.g., 100-500 meV above the valence band instead of conventional dopants), the ionization behavior changes such that the positive temperature coefficient is reduced, thereby decreasing temperature dependency while maintaining forward current characteristics
Principle concept:
If conventional dopants are used in short-circuit structures, then the forward current increases with temperature (positive temperature coefficient), but this causes significant temperature dependency that affects device performance
Why choose this principle:
The patent employs composite doping strategies where multiple dopant types or concentrations are used in the short-circuit structure. This includes combining dopants with different energy levels or using graded doping profiles to achieve optimal temperature compensation, creating a composite material system that balances forward current and temperature stability
Application Domain
Data Source
AI summary:
The use of dopants with specific energy levels, such as indium for acceptors and sulfur or selenium for donors, that are only partially ionized at room temperature, increasing ionization as temperature rises, thereby reducing the temperature dependence of the short-circuit structures by altering the hole and electron injection rates.
Abstract
A semiconductor component including a short-circuit structure. One embodiment provides a semiconductor component having a semiconductor body composed of doped semiconductor material. The semiconductor body includes a first zone of a first conduction type and a second zone of a second conduction type, complementary to the first conduction type, the second zone adjoining the first zone. The first zone and the second zone are coupled to an electrically highly conductive layer. A connection zone of the second conduction type is arranged between the second zone and the electrically highly conductive layer.