Abstract: A device includes a semiconductor fin, and a gate stack on sidewalls and a top surface of the semiconductor fin. The gate stack includes a high-k dielectric layer, a work-function layer overlapping a bottom portion of the high-k dielectric layer, and a blocking layer overlapping a second bottom portion of the work-function layer. A low-resistance metal layer overlaps and contacts the work-function layer and the blocking layer. The low-resistance metal layer has a resistivity value lower than second resistivity values of both of the work-function layer and the blocking layer. A gate spacer contacts a sidewall of the gate stack.

Abstract: A method for touchless gesture recognition is provided. The method includes transmitting ultrasonic signals via a speaker. The method includes generating ultrasonic signals. The method includes receiving the reflected ultrasonic signals from an object via two or more microphones. The method includes computing a frequency shift according to the reflected ultrasonic signals. The method includes identifying a gesture that corresponds to a movement of the object according to the frequency shift. The method includes performing a function that corresponds to the gesture.

Abstract: A device includes a semiconductor fin, and a gate stack on sidewalls and a top surface of the semiconductor fin. The gate stack includes a high-k dielectric layer, a work-function layer overlapping a bottom portion of the high-k dielectric layer, and a blocking layer overlapping a second bottom portion of the work-function layer. A low-resistance metal layer overlaps and contacts the work-function layer and the blocking layer. The low-resistance metal layer has a resistivity value lower than second resistivity values of both of the work-function layer and the blocking layer. A gate spacer contacts a sidewall of the gate stack.

Abstract: The present invention refers to a passive echo cancellation device for use in a full-duplex communication system and its signal transceiving method. The full-duplex communication system comprises a transmitting end for sending a transmit signal to a wiring interface, and a receiving end for accepting a receive signal from the wiring interface. The passive echo cancellation device comprises an offset-signal-generating circuit and a passive echo cancellation circuit composed of a plurality of passive components. The offset-signal-generating circuit generates an offset signal according to the transmit signal. The passive echo cancellation circuit is serially connected between the wiring interface and the receiving end, and is connected with the offset-signal-generating circuit.

Abstract: The present invention refers to a passive echo cancellation device for use in a full-duplex communication system and its signal transceiving method. The full-duplex communication system comprises a transmitting end for sending a transmit signal to a wiring interface, and a receiving end for accepting a receive signal from the wiring interface. The passive echo cancellation device comprises an offset-signal-generating circuit and a passive echo cancellation circuit composed of a plurality of passive components. The offset-signal-generating circuit generates an offset signal according to the transmit signal. The passive echo cancellation circuit is serially connected between the wiring interface and the receiving end, and is connected with the offset-signal-generating circuit.