Abstract:
A MEMS sensor comprising preloaded suspension springs and a method for mechanically preloading suspension springs of a MEMS sensor are described. The MEMS sensor comprises a MEMS support structure; a plurality of suspension springs connected to said support structure; and, a proof mass flexibly suspended by said suspension springs; wherein at least one of said suspension springs is mechanically preloaded with a compressive force for reducing the natural frequency of said proof mass.
Abstract:
Bulk acoustic wave filters and/or bulk acoustic resonators integrated with CMOS devices, methods of manufacture and design structure are provided. The method includes forming a single crystalline beam (18) from a silicon layer (14) on an insulator (12). The method further includes providing a coating of insulator material (22) over the single crystalline beam. The method further includes forming a via (34a) through the insulator material exposing a wafer (10) underlying the insulator. The insulator material remains over the single crystalline beam. The method further includes providing a sacrificial material (36) in the via and over the insulator material. The method further includes providing a lid (38) on the sacrificial material. The method further includes venting, through the lid, the sacrificial material and a portion of the wafer under the single crystalline beam to form an upper cavity (42a) above the single crystalline beam and a lower cavity (42b) in the wafer, below the single crystalline beam.
Abstract:
The purpose of the present invention is to improve the pressure resistance of a cavity in a semiconductor sensor device employing a resin package, and to do so without adversely affecting the embeddability of an electrically conductive member. The semiconductor sensor device has a gap 1a sealed in an airtight manner inside a laminate structure of a plurality of laminated substrates 1, 4, and 5, and has a structure in which the outside of the laminate structure is covered by a resin, wherein a platy component 2 having at least one side that is greater in length than the length of one side of the gap 1a along this side is arranged to the outside of an upper wall 1b of the gap 1, the upper wall 1b of the gap being mechanically suspended by the platy component 2.
Abstract:
A vibrating gyrosensor includes a support substrate on which a wiring pattern having a plurality of lands is formed, and a vibrating element mounted on a surface of the support substrate. The vibrating element includes a base part having a mounting surface on which a plurality of terminals, and a vibrator part integrally projected in a cantilever manner from one of the sides of the base part and having a substrate-facing surface coplanar with the mounting surface of the base part. The vibrator part has a first electrode layer, a piezoelectric layer, and a second electrode layer, which are formed on the substrate-facing surface in that order. Furthermore, a reinforcing part is formed at the base end of the vibrator part so that the sectional area of the vibrator part gradually increases toward the base part.
Abstract:
L'invention concerne un dispositif de conversion d'énergie(10), comprenant : -des première (20) et deuxième (30) électrodes destinées à être connectées aux bornes d'une charge électrique (60); -un électret (40) placé en vis-à-vis de la première électrode (20), monté mobile par rapport à la première électrode (20) selon un degré de liberté dans un plan, de sorte qu'un mouvement relatif entre l'électret et la première électrode induise une différence de potentiel entre les électrodes. De plus: -l'électret (40) comporte une couche continue présentant une série de saillies (42) s'étendant selon une direction (z) perpendiculaire audit plan, les saillies étant réparties avec un pas (P) inférieur à la course entre la première électrode et l'électret; -la première électrode (20) présente des faces (21) en vis-à-vis de l'électret, ces faces étant réparties avec un pas identique au pas des saillies de l'électret.
Abstract:
A MEMS sensor comprising preloaded suspension springs and a method for mechanically preloading suspension springs of a MEMS sensor are described. The MEMS sensor comprises a MEMS support structure; a plurality of suspension springs connected to said support structure; and, a proof mass flexibly suspended by said suspension springs; wherein at least one of said suspension springs is mechanically preloaded with a compressive force for reducing the natural frequency of said proof mass.