摘要:
In a lateral BJT formed using a BiCMOS process, the collector-to-emitter breakdown voltage (BV CEO ) and BJT's gain, are improved by forming a graded collector contact region (320) with lower doping levels toward the base contact (340).
摘要:
Device structures, design structures, and fabrication methods for a bipolar junction transistor. A first layer comprised of a first semiconductor material and a second layer comprised of a second semiconductor material are disposed on a substrate containing a first terminal of the bipolar junction transistor. The second layer is disposed on the first layer and a patterned etch mask is formed on the second layer. A trench extends through the pattern hardmask layer, the first layer, and the second layer and into the substrate. The trench defines a section of the first layer stacked with a section of the second layer. A selective etching process is used to narrow the section of the second layer relative to the section of the first layer to define a second terminal and to widen a portion of the trench in the substrate to undercut the section of the first layer.
摘要:
In described examples, a bipolar transistor (100) includes: a substrate (105) having a semiconductor surface (106); and first and second trench enclosures (121, 122), both at least lined with a dielectric extending downward from a topside (106a) of the semiconductor surface (106) to a trench depth. The first trench enclosure (121) defines an inner enclosed area. A base (140) and an emitter (150) formed in the base (140) are within the inner enclosed area. A buried layer (126) is below the trench depth, including under the base (140). A sinker diffusion (115) includes a first portion (115a) between the first and second trench enclosures (121, 122), extending from the topside (106a) of the semiconductor surface (106) to the buried layer, and a second portion (115b) within the inner enclosed area. The second portion (115b) does not extend to the topside (106a) of the semiconductor surface (106).
摘要:
A negative bevel edge termination for a Silicon Carbide (SiC) semiconductor device is disclosed. In one embodiment, the negative bevel edge termination includes multiple steps that approximate a smooth negative bevel edge termination at a desired slope. More specifically, in one embodiment, the negative bevel edge termination includes at least five steps, at least ten steps, or at least 15 steps. The desired slope is, in one embodiment, less than or equal to fifteen degrees. In one embodiment, the negative bevel edge termination results in a blocking voltage for the semiconductor device of at least 10 kilovolts (kV) or at least 12 kV. The semiconductor device is preferably, but not necessarily, a thyristor such as a power thyristor, a Bipolar Junction Transistor (BJT), an Insulated Gate Bipolar Transistor (IGBT), a U-channel Metal-Oxide-Semiconductor Field Effect Transistor (UMOSFET), or a PIN diode.
摘要:
Vertikaler Bipolartransistor, mit einer vertikalen Schichtfolge von Emitter (106), Basis (108) und Kollektor (110, 124, 120), bei dem der Kollektor ein dotiertes inneres Kollektorgebiet (110) eines ersten Leitfähigkeitstyps und ein im Vergleich mit dem inneren Kollektorgebiet höher dotiertes Kollektoranschlussgebiet (120) des ersten Leitfähigkeitstyps aufweist, und bei dem an das innere Kollektorgebiet (110) in einer lateralen Richtung, die quer zu einer vertikalen Stapelrichtung der Schichtfolge weist, ein im Vergleich mit dem inneren Kollektorgebiet schwächer dotiertes Kollektor-Driftgebiet (124) des ersten Leitfähigkeitstyps ohne eine darunter liegende hoch dotierte vergrabene Schicht vom selben Leitfähigkeitstyp, i.e. ohne Subkollektor, anschließt, über welches das innere Kollektorgebiet mit dem Kollektoranschlussgebiet verbunden ist.
摘要:
Some embodiments include gated bipolar junction transistors. The transistors may include a base region between a collector region and an emitter region; with a B-C junction being at an interface of the base region and the collector region, and with a B-E junction being at an interface of the base region and the emitter region. The transistors may include material having a bandgap of at least 1.2 eV within one or more of the base, emitter and collector regions. The gated transistors may include a gate along the base region and spaced from the base region by dielectric material, with the gate not overlapping either the B-C junction or the B-E junction. Some embodiments include memory arrays containing gated bipolar junction transistors. Some embodiments include methods of forming gated bipolar junction transistors.
摘要:
An electronic structure comprising: (a) a first metal layer; (b) a second metal layer; (c) and at least one insulator layer located between the first metal layer and the second metal layer, wherein at least one of the metal layers comprises an amorphous multi-component metallic film. In certain embodiments, the construct is a metal-insulator-metal (MIM) diode. In other embodiments, the construct is a amorphous multi-component metallic thin film nanolaminate.