摘要:
The invention relates to a method of forming a transistor structure on a substrate (SOI), the substrate comprising a supporting Si layer (1), a buried insulating layer (2), and a top Si layer (3) comprising a high dopant level, the transistor structure comprising a gate region (G1), and a source and drain region (5). The method further comprises the formation of the gate region (G1) on the top Si layer (3), the gate region (G1) being separated from the top Si layer (3) by a dielectric layer (GD), the formation of an open area (O1) on the top Si layer (3) demarcated by a demarcating oxide and/or resist layer region (4), the formation of high level impurity or heavily-damaged regions (5) by ion implantation, exposing the open area (O1) to an ion beam (IB), with the demarcating layer region (4) and the gate region (G1) acting as implantation mask. The ion beam (IB) comprises a combination of beam energy and dose, which allows the formation, in the top Si layer (3), of high impurity level regions (L1) below the source and drain regions (5) in the buried insulating layer (2) and of a high impurity level or heavily-damaged regions (L0) below the gate region (G1) in the top Si layer (3).
摘要:
A method in the fabrication of a monolithically integrated vertical device on an SOI substrate comprises the steps of providing an SOI substrate including, from bottom to top, a silicon bulk material (11), an insulating layer (12), and an monocrystalline silicon layer (13); forming an opening (31) in the substrate, which extends into the bulk material (11), forming silicon oxide on exposed silicon surfaces in the opening and subsequently removing the formed oxide (51), whereby steps (61) in the opening are formed; forming a region (62) of epitaxial silicon in the opening; and forming a deep trench (161) in an area around the opening, whereby the steps (61) in the opening are removed.
摘要:
To refine a semiconductor device (100), in particular a S[ilicon]O[n]I[nsulator] device, comprising: at least one isolating layer (10) made of a dielectric material; at least one silicon substrate (20) arranged on said isolating layer (10); at least one component (30) integrated in the silicon substrate (20), which component has at least one slightly doped zone (34); as well as at least a first, in particular planar, metallization region (40) arranged between the isolating layer (10) and the component (30), in particular between the isolating layer (10) and the slightly doped zone (34) of the component (30), as well as a method of manufacturing at least one semiconductor device (100) in such a manner that trouble-free operation also of slightly doped components (30), such as pnp transistors, is guaranteed in a SOI process transferred onto the insulator, it is proposed that at least a second, in particular planar, metallization region (42) is arranged on the side of the silicon substrate (20) facing away from the isolating layer (10), in the area of the component (30), particularly in the area of the slightly doped zone (34) of the component (30).
摘要:
A semiconductor comprising a buried conducting layer (108), such as a buried collector, comprises a trench, the walls of which are covered with a layer (109') of a material in which dopant ions diffuse faster than in monocrystalline silicon. A contact area is doped in close proximity to the trench wall (109'). The dopants will diffuse through the layer (109') and form a low resistance connection to the buried layer (108). The layer (109') may comprise polysilicon or porous silicon, or a silicide. If the material used in the layer (109') is not in itself conducting, the size of the component may be significantly reduced.
摘要:
Verfahren zur Herstellung lateraler Bipolartransistoren auf SOI-Substrat, bei dem in der Siliziumschicht dieses SOI-Substrates eine Grunddotierung für den Leitfähigkeitstyp von Emitter und Kollektor hergestellt wird, außerhalb des für den Transistor vorgesehenen Bereiches Isolationsbereiche (5) hergestellt werden, Kontaktschichten (71, 81) und Dielektrikumschichten (72, 82) über einer durch Maskentechnik hergestellten hoch dotierten Emitterzone (7) und einer hoch dotierten Kollektorzone (8) aufgebracht und strukturiert werden, so daß sich über einer herzustellenden Basiszone (9) in der Mitte zwischen Emitterzone (7) und Kollektorzone (8) ein Graben befindet, dann eine Hilfsschicht (11) ganzflächig konform mit konstanter Dicke (d) abgeschieden wird, wodurch der Graben der Breite (d) zu einem Spalt der Breite (x) der herzustellenden Basiszone (9) vermindert wird, durch diesen Spalt eine Implantation von Dotierstoff für das Vorzeichen der Leitfähigkeit der Basis vorgenommen wird, wobei die lateral zu dieser Basiszone (9) befindlichen Bereiche durch die die Flanken des Grabens bedeckenden vertikalen Anteile der Hilfsschicht (11) abgeschirmt werden, dann Kontaktlöcher in die Hilfsschicht (11) und die Dielektrikumschicht (72, 82) geätzt werden und Metallkontakte für den elektrischen Anschluß von Emitter, Kollektor und Basis hergestellt werden.
摘要:
The present invention solves the problems present in the prior art by forming a lateral emitter base junction of a bipolar transistor in which an N+ polysilicon layer forms the emitter. This is accomplished by attaching the polysilicon emitter to a vertical surface of the single crystal silicon. Single crystal silicon (102) is grown on a dielectric (104) and covered with another dielectric layer and an extrinsic base polysilicon layer (106). Polysilicon sidewall spacers (112) are formed as an edge strap connection between the extrinsic base and the single crystal silicon. The edge strap is isolated from the remainder of the device by a second sidewall spacer (114). An intrinsic base region (150) is formed in the single crystal silicon using the sidewall spacer as one defining edge of the intrinsic base region. The intrinsic base region (150) diffuses under the sidewall spacers. The single crystal silicon is etched to the underlying dielectric using the second sidewall spacer as one defining edge. This etch removes all the intrinsic base region except that under the sidewall spacers and leaves a vertical surface of the single crystal silicon exposed. This exposed vertical surface is the intrinsic base region. Conformal N type polysilicon (125) is then deposited to form an emitter contact on the vertical surface of the single crystal silicon intrinsic base region.
摘要:
L'invention concerne un transistor bipolaire NPN ou PNP réalisé selon une disposition latérale sur un substrat isolant (10). Ce transistor comprend côte à côte une région d'émetteur (12), une région de base étroite (20) et une région de collecteur (14), toutes trois en silicium monocristallin, avec une couche de silicium polycristallin étroite (22) recouvrant exactement la région étroite de base et servant de conducteur d'accès à cette région. Un contact métallique est relié à cette région de silicium polycristallin, mais en dehors de la zone de base proprement dite entre l'émetteur et le collecteur, afin de ne pas risquer un court-circuit des jonctions par la métallisation. Ce transistor bipolaire est réalisable selon une technologie MOS.
摘要:
The invention relates to a semiconductor device (10) with a semiconductor body (12) comprising a bipolar transistor with an emitter region (1), a base region (2) and a collector region (3) of, respectively, a first conductivity type, a second conductivity type, opposite to the first conductivity type, and the first conductivity type, wherein, viewed in projection, the emitter region (1) is positioned above or below the base region (2), and the collector region (3) laterally borders the base region (2). According to the invention, the base region (2) comprises a highly doped subregion (2A) the doping concentration of which has a delta-shaped profile in the thickness direction, and said highly doped sub-region (2A) extends laterally as far as the collector region (3). Such a lateral bipolar transistor has excellent high-frequency properties and a relatively high breakdown voltage between the base and collector regions (2, 3), implying that the device is suitable for high power applications. The doping concentration lies preferably between about 1019 and about 1020 at/cm3, and the thickness of the sub-region (2A) lies between 1 and 15 nm and preferably between 1 and 10 nm. The invention also comprises a method of manufacturing such a device (10).
摘要:
The invention provides a method for fabricating a bipolar transistor applying a standard shallow trench isolation fabrication method to simultaneously form a vertical bipolar transistor (29) or a lateral bipolar transistor (49) in a first trench (5, 50) and a shallow trench isolation region (27, 270) in a second trench (7, 70). Further, the fabrication method may simultaneously form a vertical bipolar transistor (27) in the first trench (5, 50), a lateral bipolar transistor (49) in a third trench and a shallow trench isolation region (27, 270) in the second trench (7, 70).
摘要:
Process for manufacturing an electronic semiconductor device, wherein a SOI wafer (20) is provided, formed by a bottom layer (21) of semiconductor material, an insulating layer (22), and a top layer (50) of semiconductor material, stacked on top of one another; alignment marks (32) are formed in the top layer; an implanted buried region (30) is formed, aligned to the alignment marks; a hard mask (52,53) is formed on top of the top layer (23;50) so as to align it to the alignment marks (32); using the hard mask, the top layer (23;50) is selectively removed so as to form a trench (55) extending up to the insulating layer (22); there a lateral-insulation region (60) in the trench (55), that is contiguous to the insulating layer (22) and delimits with the latter an insulated well (61) of semiconductor material; and electronic components (65-76) are formed in the top layer (23;50).