摘要:
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.
摘要:
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.
摘要:
Disclosed is a method of manufacturing a vertical bipolar transistor in a CMOS process, comprising implanting an impurity of a first type into a the substrate (100) to form a buried region (150, 260) therein; forming a halo implant (134) using an impurity of a second type and a shallow implant (132) using an impurity of the first type, said halo implant enveloping the shallow implant in the substrate and being located over said buried region (150, 250); forming, adjacent to the halo implant (134), a further implant (136) using an impurity of the second type for providing a conductive connection to the halo implant; and providing respective connections (170, 160, 270) to the further implant (136), the shallow implant (132) and the buried region (150, 260) allowing the shallow implant, halo implant and buried region to be respectively operable as emitter, base and collector of the vertical bipolar transistor. Hence, an IC may be provided that comprises vertical bipolar transistors manufactured using CMOS processing steps only.
摘要:
A bipolar transistor is fabricated having a collector (52) in a substrate (1) and a base (57, 58) and an emitter (59) formed over the substrate. The base has a stack region (57) which is laterally separated from the emitter (59) by an electrically insulating spacer (71). The insulating spacer (71) has a width dimension at its top end at least as large as the width dimension at its bottom end and forms a Γ-shape or an oblique shape. The profile reduces the risk of silicide bridging at the top of the spacer in subsequent processing, while maintaining the width of emitter window.
摘要:
A device (100) for generating an output signal (So) having substantially same or increased output frequency compared to an input frequency of an input signal (Si), the device (100) comprising: a bipolar transistor (102) having a base (B), a collector (C), and an emitter (E); a control unit (104) adapted for controlling application of the input signal (Si) to the base (B) and adapted for controlling application of a collector-emitter voltage between the collector (C) and the emitter (E) in a manner for operating the bipolar transistor (102) in a snap-back regime to obtain a non-linear collector current characteristic to thereby generate the output signal (So) having the substantially same or increased output frequency resulting from a steeply rising collector current.
摘要:
A device (100) for generating an output signal (So) having substantially same or increased output frequency compared to an input frequency of an input signal (Si), the device (100) comprising: a bipolar transistor (102) having a base (B), a collector (C), and an emitter (E); a control unit (104) adapted for controlling application of the input signal (Si) to the base (B) and adapted for controlling application of a collector-emitter voltage between the collector (C) and the emitter (E) in a manner for operating the bipolar transistor (102) in a snap-back regime to obtain a non-linear collector current characteristic to thereby generate the output signal (So) having the substantially same or increased output frequency resulting from a steeply rising collector current.
摘要:
Disclosed is a method of manufacturing a heterojunction bipolar transistor comprising a substrate, an upper region of said substrate comprising an active region of the bipolar transistor bordered by shallow trench insulation, said active region comprising a buried collector region extending to a depth beyond the depth of the shallow trench insulation, the method comprising forming a trench in the substrate adjacent to said active region, said trench extending through the shallow trench insulation; at least partially filling said trench with an impurity; and forming a collector sinker in the substrate by developing said impurity to extend into the substrate to a depth beyond the depth of the shallow trench insulation. An IC comprising a heterojunction bipolar transistor manufactured by this method is also disclosed.
摘要:
A method of manufacturing a heterojunction bipolar transistor, including providing a substrate comprising an active region bordered by shallow trench insulation regions; depositing a stack of a dielectric layer and a polysilicon layer over the substrate; forming a base window in the stack, the base window extending over the active region and part of the shallow trench insulation regions, the base window having a trench extending vertically between the active region and one of the shallow trench insulation regions; growing an epitaxial base material inside the base window; forming a spacer on the exposed side walls of the base material; and filling the base window with an emitter material. A HBT manufactured in this manner and an IC including such an HBT.
摘要:
A control circuit for a transistor arrangement comprises a monitoring arrangement (60) for monitoring the current flow and voltage across the transistor arrangement (50) and means (62) for determining if the current and voltage values define an operating point which falls within a stable operating region. The stable operating region comprises a region having a boundary (30) which comprises an electro-thermal instability line.
摘要:
Disclosed is a method of manufacturing a heterojunction bipolar transistor comprising a substrate, an upper region of said substrate comprising an active region of the bipolar transistor bordered by shallow trench insulation, said active region comprising a buried collector region extending to a depth beyond the depth of the shallow trench insulation, the method comprising forming a trench in the substrate adjacent to said active region, said trench extending through the shallow trench insulation; at least partially filling said trench with an impurity; and forming a collector sinker in the substrate by developing said impurity to extend into the substrate to a depth beyond the depth of the shallow trench insulation. An IC comprising a heterojunction bipolar transistor manufactured by this method is also disclosed.