Patent ID: 11869762
Assignee: ALPHA POWER SOLUTIONS LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. A temperature sensing system, comprising:
a semiconductor device including a device cell and a temperature sensing component adjacent to the device cell, the device cell including a gate component configured to receive a gate control signal, each of the temperature sensing component and the gate component including polycrystalline silicon disposed on a common layer, the semiconductor device further including an interlayer dielectric layer that covers at least partially the temperature sensing component and the gate component, and a metal layer contacting a portion of the temperature sensing component; and
a controller configured to generate the gate control signal and adjust the gate control signal in response to temperature information received from the temperature sensing component, wherein the temperature sensing component is formed as a polycrystalline silicon resistor,
wherein the temperature sensing component and the gate component are formed from a same polycrystalline silicon layer and spaced from each other,
wherein both the temperature sensing component and the gate component directly contact the common layer, the common layer being a dielectric layer;
wherein the polycrystalline silicon of the temperature sensing component is doped with N-type impurities of a first impurity concentration, and the polycrystalline silicon of the gate component is doped with N-type impurities of a second impurity concentration, and the first impurity concentration is smaller than the second impurity concentration,
wherein the portions of the temperature sensing component contacting the metal layer are doped more heavily compared with other portions of the temperature sensing component;
wherein the temperature sensing component has a negative temperature coefficient, and
wherein the semiconductor device is selected from a group consisting of a metal-oxide-semiconductor field-effect transistor, an insulated-gate bipolar transistor, and a junction gate field-effect transistor.