Abstract: Semiconductor structures are provided. The semiconductor structure includes a substrate and nanostructures formed over the substrate. In addition, the nanostructures includes channel regions and source/drain regions. The semiconductor structure further includes a gate structure vertically sandwiched the channel regions of the nanostructures and a contact wrapping around and vertically sandwiched between the source/drain regions of the nanostructures.

Abstract: A radio frequency (RF) system and a communication device are provided. The RF system includes a flexible circuit board, a first antenna module and a RF module. The flexible circuit board has a first surface and a second surface, and the first surface and the second surface are located at different sides of the flexible circuit board. The first antenna module is disposed on the first surface of the flexible circuit board. The first antenna module includes a first carrier, a first antenna element disposed on or in the first carrier, and a first conductive member between the first carrier and the flexible circuit board. The RF module is disposed on the second surface of the flexible circuit board and electrically connected to the first antenna module.

Abstract: Semiconductor structures are provided. The semiconductor structure includes a substrate and nanostructures formed over the substrate. The semiconductor structure further includes a gate structure surrounding the nanostructures and a source/drain structure attached to the nanostructures. The semiconductor structure further includes a contact formed over the source/drain structure and extending into the source/drain structure.

Abstract: A layer jump control apparatus of an optical drive. The layer jump control apparatus has a pick up head, a preamplifier, a controller producing a focusing control signal FC, a low pass filter for receiving FC and producing a layer distance balancing signal LC, and a driving device to send a driving force to the pick up head. When the optical drive does not perform the layer jump process, the driving device receives FC. When the optical drive performs the layer jump process, the driving device receives a kicking signal and LB to determine the driving force in the kicking process; the driving device receives a braking signal and LB to determine the driving force in when the optical drive performs the braking process; and the driving device receives LB to determine the driving force in the holding process and the waiting process.

Abstract: The present invention discloses an apparatus for controlling a layer jump process of an optical drive. The layer jump control apparatus has a pick up head having a lens and a voice coil motor, a preamplifier for producing a focusing error signal, a controller for receiving the focusing error signal and producing a focusing control signal, a low pass filter for receiving the focusing control signal and producing a layer distance balancing signal, and a driving device to send a driving force to the pick up head.