Abstract: A semiconductor device structure is provided. The semiconductor device structure includes a first source/drain epitaxial feature formed over a substrate, a second source/drain epitaxial feature formed over the substrate, two or more semiconductor layers disposed between the first source/drain epitaxial feature and the second source/drain epitaxial feature, a gate electrode layer surrounding a portion of one of the two or more semiconductor layers, a first dielectric region disposed in the substrate and in contact with a first side of the first source/drain epitaxial feature, and a second dielectric region disposed in the substrate and in contact with a first side of the second source/drain epitaxial feature, the second dielectric region being separated from the first dielectric region by a substrate.

Abstract: The present invention discloses an embedded network-controlled omni-directional motion system with optical flow based navigation, wherein multiple motion units and at least one embedded network control system are installed to the body, and at least one optical flow sensor is installed on the ground-facing surface of the body. The movement of the body is driven by the motion units, and the motion unit has an omni-directional wheel and a motor device. The optical flow sensors detect the state of motion and create optical-flow detection data. The embedded network control system exchanges motion control instructions and optical-flow detection data with an external information-processing unit via a communication network. Further, the motion system of the present invention may also connect with peripheral control devices to increase the control convenience of the system.