Abstract: A semiconductor switch includes an insulating film on a semiconductor substrate. A switching circuit is on a first portion of the insulating film. The switching circuit is configured to switch a path of a high-frequency signal. A wiring layer is provided on the insulating film. The wiring layering includes a signal wire and a ground wire. A conductive layer is between the wiring layer and the insulating film. The conductive layer, in some embodiments, includes a first conductive region between the high-frequency wiring and the insulating film and a second conductive region between the grounding wiring and the insulating film.

Abstract: According to one embodiment, a semiconductor switch circuit includes a semiconductor substrate, an insulating film, a semiconductor layer, a first wiring line, a semiconductor switch unit, and a first conductor. The insulating film is provided on the semiconductor substrate. The semiconductor layer is provided on the insulating film. The first wiring line is provided above the insulating film. The semiconductor switch unit is provided on the semiconductor layer and is electrically connected to the first wiring line. The first conductor is provided between the first wiring line and the semiconductor substrate.

Abstract: According to an embodiment, a semiconductor switch includes a first insulating film on a semiconductor substrate, a first semiconductor layer on the first insulating film, a semiconductor switch circuit on the first semiconductor layer, and a wiring on the first insulating film. The first insulating film being between the wiring and the substrate. The wiring connects the semiconductor switch circuit and a terminal. A polycrystalline semiconductor layer is between the wiring and the first insulating film.

Abstract: A semiconductor switch includes an insulating film on a semiconductor substrate. A switching circuit is on a first portion of the insulating film. The switching circuit is configured to switch a path of a high-frequency signal. A wiring layer is provided on the insulating film. The wiring layering includes a signal wire and a ground wire. A conductive layer is between the wiring layer and the insulating film. The conductive layer, in some embodiments, includes a first conductive region between the high-frequency wiring and the insulating film and a second conductive region between the grounding wiring and the insulating film.

Abstract: According to an embodiment, a semiconductor switch includes a first insulating film on a semiconductor substrate, a first semiconductor layer on the first insulating film, a semiconductor switch circuit on the first semiconductor layer, and a wiring on the first insulating film. The first insulating film being between the wiring and the substrate. The wiring connects the semiconductor switch circuit and a terminal. A polycrystalline semiconductor layer is between the wiring and the first insulating film.

Abstract: According to one embodiment, a semiconductor switch circuit includes a semiconductor substrate, an insulating film, a semiconductor layer, a first wiring line, a semiconductor switch unit, and a first conductor. The insulating film is provided on the semiconductor substrate. The semiconductor layer is provided on the insulating film. The first wiring line is provided above the insulating film. The semiconductor switch unit is provided on the semiconductor layer and is electrically connected to the first wiring line. The first conductor is provided between the first wiring line and the semiconductor substrate.

Abstract: A playback device includes a reading section that performs reading from a recording medium, and a control section that acquires the latest temporary management information recorded last on the recording medium. The control section executes a read control process of controlling the reading section so that when reading pointer information in a temporary management information unit recorded last in a temporary management information unit recording area, reading of data is executed from a predetermined position located before a segment in which the pointer information is included, and an information acquiring process of executing a process for acquiring the temporary management information pointed to by the pointer information from the data read in response to the read control process.

Abstract: A playback device includes a reading section that performs reading from a recording medium, and a control section that acquires the latest temporary management information recorded last on the recording medium. The control section executes a read control process of controlling the reading section so that when reading pointer information in a temporary management information unit recorded last in a temporary management information unit recording area, reading of data is executed from a predetermined position located before a segment in which the pointer information is included, and an information acquiring process of executing a process for acquiring the temporary management information pointed to by the pointer information from the data read in response to the read control process.

Abstract: The present invention has been made to adequately and quickly adjust the spherical aberration and focus bias in an optical pickup. In the present invention, evaluation values are measured on a plurality of respective measurement points each determined by a combination of a spherical aberration correction value and focus bias value and a two-variable function having the spherical aberration correction value and focus bias value as variables is approximated to the evaluation values. Based on the two-variable function obtained by the approximation, the optimal value of the spherical aberration correction value and focus bias value on which the evaluation value becomes optimal is calculated. As a result, it is possible to adequately and quickly adjust the spherical aberration and focus bias in an optical pickup.

Abstract: The present invention has been made to adequately and quickly adjust the spherical aberration and focus bias in an optical pickup. In the present invention, evaluation values are measured on a plurality of respective measurement points each determined by a combination of a spherical aberration correction value and focus bias value and a two-variable function having the spherical aberration correction value and focus bias value as variables is approximated to the evaluation values. Based on the two-variable function obtained by the approximation, the optimal value of the spherical aberration correction value and focus bias value on which the evaluation value becomes optimal is calculated. As a result, it is possible to adequately and quickly adjust the spherical aberration and focus bias in an optical pickup.