Abstract:
An optocoupler device facilitates on-chip galvanic isolation. In accordance with various example embodiments, an optocoupler circuit includes a silicon-on-insulator substrate having a silicon layer on a buried insulator layer, a silicon-based light-emitting diode (LED) having a silicon p-n junction in the silicon layer, and a silicon-based photodetector in the silicon layer. The LED and photodetector are respectively connected to galvanically isolated circuits in the silicon layer. A local oxidation of silicon (LOCOS) isolation material and the buried insulator layer galvanically isolate the first circuit from the second circuit to prevent charge carriers from moving between the first and second circuits. The LED and photodetector communicate optically to pass signals between the galvanically isolated circuits.
Abstract:
A piezo-resistive MEMS resonator comprising an anchor (12), a resonator (10) mounted on the anchor, an actuator (16) mounted to apply an electrostatic force on the resonator and a piezo-resistive read-out means comprising a nanowire (18) coupled to the resonator.
Abstract:
An integrated circuit includes a support (1), at least three metal layers above the support, the metal layers having a top metal layer with a top plate (33) and a bottom metal layer with a bottom plate (25), dielectric material (31) between the top and bottom plates to form a capacitor (2), and plural oxide layers (9, 11, 13, 15) above the support, such oxide layers including a top oxide layer (27), each oxide layer respectively covering a corresponding metal layer. The top oxide layer covers the top metal layer and has an opening exposing at least part of the top plate. A method of forming the integrated circuit comprises the steps of providing a support with metal and oxide layers, including a bottom plate, forming a cavity exposing the bottom plate, filling the cavity with dielectric, applying a further metal layer having a top plate and a further oxide layer, and forming an opening to expose the top plate.
Abstract:
Embodiments of a semiconductor device, a circuit including a semiconductor device and a driver circuit, and a method for operating a semiconductor device are described. In one embodiment, a semiconductor device includes a substrate, a source region, a drain region, and a drain extension region formed in the substrate, and an insulation layer adjacent to the drain extension region. A gate layer and a field plate are formed one of within and on the insulation layer. The field plate is located adjacent to the drain extension region and is electrically insulated from the gate layer and the source region such that a voltage can be applied to the field plate independent from voltages applied to the gate layer and the source region. Other embodiments are also described.
Abstract:
One or more embodiments provide circuitry for isolation and communication of signals between circuits operating in different voltage domains using capacitive coupling. The embodiments utilize capacitive structures having increased breakdown voltage in comparison to previous parallel plate implementations. The capacitive isolation is provided by parallel plate capacitive structures, each implemented to have parallel plates of different horizontal sizes. Due to the difference in horizontal size, edges of the parallel plates, where electric fields are the strongest, are laterally offset from the region where the parallel plates overlap. As a result, breakdown voltage between the parallel plates is increased.
Abstract:
An optocoupler device facilitates on-chip galvanic isolation. In accordance with various example embodiments, an optocoupler circuit includes a silicon-on-insulator substrate having a silicon layer on a buried insulator layer, a silicon-based light-emitting diode (LED) having a silicon p-n junction in the silicon layer, and a silicon-based photodetector in the silicon layer. The LED and photodetector are respectively connected to galvanically isolated circuits in the silicon layer. A local oxidation of silicon (LOCOS) isolation material and the buried insulator layer galvanically isolate the first circuit from the second circuit to prevent charge carriers from moving between the first and second circuits. The LED and photodetector communicate optically to pass signals between the galvanically isolated circuits.
Abstract:
In a first aspect, the invention provides a MEMS packaging method in which a first sacrificial etch is used to release a MEMS component by removing the sacrificial support layer beneath the MEMS component, and a second sacrificial etch is used to remove a sacrificial cover layer beneath a hermetic cover layer. In a second aspect, the invention provides a MEMS packaging method in which a hermetic cover layer is provided over a sacrificial cover layer which is then removed. A separate reinforcement cap layer is deposited over the hermetic cover layer.
Abstract:
A method of packaging a micro electro-mechanical structure (122) comprises forming said structure (122) on a substrate (100); depositing a sacrificial layer (130) over said structure (122); patterning the sacrificial layer (130); depositing a SIPOS (semi-insulating polycrystalline silicon) layer (140) over the patterned sacrificial layer (130); treating the SIPOS layer (140) with an etchant to convert the SIPOS layer into a porous SIPOS layer, removing the patterned sacrificial layer (130) through the porous layer SIPOS (140) to form a cavity (150) including said structure (122); and sealing the porous SIPOS layer (140). A device including such a packaged micro electro-mechanical structure (122) is also disclosed.
Abstract:
Disclosed is a device comprising a substrate (10) carrying a microscopic structure (15) in a cavity (20) capped by a capping layer (18) comprising a material of formula SiN x H y , wherein x>1.33 and y>0. A method of forming such a device is also disclosed.
Abstract translation:公开了一种装置,其包括在由帽状层(18)覆盖的空腔(20)中承载微观结构(15)的衬底(10),所述覆盖层包括式SiN x H y的材料,其中x> 1.33且y> 0。 还公开了一种形成这种装置的方法。