Abstract:
A multiple coil spring MEMS resonator includes a center anchor and a resonator body (106) including two or more coil springs (102a, 102b) extending in a spiral pattern from the center anchor to an outer closed ring (104). Each pair of coil springs originates from opposing points on the center anchor and extends in the spiral pattern to opposing points on the outer ring. The number of coil springs, the length and the width of the coil springs and the weight of the outer ring are selected to realize a desired resonant frequency. The outer ring (104) comprises perpendicular transducers (108) and may comprise holes (130) to adjust the weight of the outer ring (104). A set of drive electrodes (110) and sense electrodes (112) are attached to the substrate.
Abstract:
Es wird ein Verfahren zur Herstellung wenigstens einer Abdeckung (11, 12) für ein Bauelement (16) angegeben, bei dem eine Schicht (1, 9) eines Materials auf ein Trägersubstrat (4) aufgebracht wird, wobei die Schicht (1, 9) wenigstens eine Ausnehmung (5) aufweist und wobei die Schicht (1, 9) erwärmt wird, so dass die Ausnehmung (5) zumindest teilweise vom Material der Schicht (1, 9) aufgefüllt wird. Weiterhin wird ein Bauelement (16) angegeben, auf dem mehrere in Dünnschicht-Technologie hergestellte Abdeckungen (14, 15) unterschiedlicher lateraler Ausdehnungen (l 1 , l 2 ) nebeneinander angeordnet sind, wobei die Abdeckungen (14, 15) denselben Krümmungsradius (r 14 , r 15 ) aufweisen.
Abstract:
Micromachined ultrasonic transducers integrated with complementary metal oxide semiconductor (CMOS) substrates are described, as well as methods of fabricating such devices. Fabrication may involve two separate wafer bonding steps. Wafer bonding may be used to fabricate sealed cavities (306) in a substrate (302). Wafer bonding may also be used to bond the substrate (302) to another substrate (304), such as a CMOS wafer. At least the second wafer bonding may be performed at a low temperature.
Abstract:
Capteur inertiel de type MEMS, comprenant un bâti auquel au moins un premier corps sismique et un deuxième corps sismique sont reliés par des moyens élastiques pour être mobiles dans un plan de suspension, des transducteurs pour maintenir en vibration les corps sismiques et pour déterminer un mouvement des corps sismiques dans le plan de suspension, et une unité de commande reliée aux transducteurs par des moyens de conduction électrique. Les transducteurs comportent au moins une électrode solidaire du premier corps sismique et une électrode solidaire du deuxième corps sismique, les deux électrodes étant agencées pour permettre de mesurer directement le mouvement relatif des corps sismiques l'un par rapport à l'autre dans le plan de suspension.
Abstract:
In one embodiment, a method of forming an out-of-plane electrode includes forming an oxide layer above an upper surface of a device layer, etching an etch stop perimeter defining trench extending through the oxide layer, forming a first cap layer portion on an upper surface of the oxide layer and within the etch stop perimeter defining trench, etching a first electrode perimeter defining trench extending through the first cap layer portion and stopping at the oxide layer, depositing a first material portion within the first electrode perimeter defining trench, depositing a second cap layer portion above the deposited first material portion, and vapor releasing a portion of the oxide layer with the etch stop portion providing a lateral etch stop.
Abstract:
Methods of forming semiconductor devices comprising integrated circuits and microelectromechanical system (MEMS) devices operatively coupled with the integrated circuits involve the formation of an electrically conductive via extending at least partially through a substrate from a first major surface of the substrate toward an opposing second major surface of the substrate, and the fabrication of at least a portion of an integrated circuit on the first major surface of the substrate. A M EMS device is provided on the second major surface of the substrate, and the MEMS device is operatively coupled with the integrated circuit using the at least one electrically conductive via. Structures and devices are fabricated using such methods.
Abstract:
La présente invention concerne un procédé de fabrication d'un résonateur dans un substrat, caractérisé en ce qu'il comprend les étapes suivantes: a) modifier la structure d'au moins une zone du substrat afin de rendre plus sélective ladite au moins une zone; b) graver ladite au moins une zone afin de sélectivement fabriquer ledit résonateur.
Abstract:
Provided is a method of manufacturing a capacitive electromechanical transducer using fusion bonding, which is capable of reducing fluctuations in initial deformation among diaphragms caused at positions having different boundary conditions such as the bonding area, thereby enhancing the uniformity of the transducer and stabilizing the sensitivity and the like. The method of manufacturing a capacitive electromechanical transducer includes: forming an insulating layer on a first silicon substrate and forming at least one recess; fusion bonding a second silicon substrate onto the insulating layer; and thinning the second silicon substrate and forming a silicon film. The method further includes, before the bonding of the second silicon substrate onto the insulating layer, forming a groove in the insulating layer at the periphery of the at least one recess.