Abstract:
High-frequency circuit components are disclosed in which parasitic capacitance between a high-frequency circuit element and a substrate is reduced and mechanical strength is improved. An exemplary component has a conductive substrate, a coil as the high-frequency circuit-element, a mounting board including a thin dielectric film on which the coil is mounted, and a support board that couples the mounting board to the substrate. The mounting board is coupled so that it floats relative to the substrate as a result of deliberate warping of the support board.
Abstract:
A semiconductor device includes a semiconductor substrate, an actuator provided above the semiconductor substrate to move upwardly, a first electrode layer which is moved by the actuator, and a cap portion provided above the first electrode layer and including a second electrode layer.
Abstract:
PROBLEM TO BE SOLVED: To prevent sticking (sticking of an element) in an actuator element using a piezoelectric material. SOLUTION: A base substrate (10) is arranged to oppose to a movable part including a diaphragm (24) to which a piezoelectric body (30) sandwiched between a pair of electrodes (33, 26) is bonded. The movable part is displaced in a direction approaching the base substrate (10) by application of a drive voltage to the pair of electrodes (33, 26). Polarization (Pr)-electric field (E) hysteresis characteristics of the piezoelectric body (30) are biased with respect to an electric field, and by application of a voltage in an opposite direction to the drive voltage to the pair of electrodes (33, 26), the movable part is displaced in a direction away from the base substrate (10). The element is prevented from sticking by the driving in the opposite direction. An applied electric field during the sticking preventing driving is equal to or less than the coercive electric field of the piezoelectric body (30), preferably, 10 to 80% of the coercive electric field. COPYRIGHT: (C)2011,JPO&INPIT