Abstract:
In dem Halbleiterkörper (1) ist eine Aussparung (11) vorhanden, die den Halbleiterkörper durchdringt. Eine Leiterschicht (6), die mit einer Metallebene (3) auf oder über dem Halbleiterkörper elektrisch leitend verbunden ist, schirmt den Halbleiterkörper von der Aussparung elektrisch ab. Die Leiterschicht kann Metall, gegebenenfalls mit einer Barriereschicht (6a), oder ein dotierter Bereich des Halbleiterkörpers sein.
Abstract:
The method comprises providing a semiconductor substrate (1), which has a main surface (12) and an opposite further main surface (13), arranging a contact pad (19) above the further main surface, forming a through-substrate via (4) from the main surface to the further main surface at a distance from the contact pad and, by the same method step together with the through-substrate via, forming a further through- substrate via (14) above the contact pad, arranging a hollow metal via layer (5) in the through-substrate via and, by the same method step together with the metal via layer, arranging a further metal via layer (15) in the further through- substrate via, the further metal via layer contacting the contact pad, and removing a bottom portion of the metal via layer to form an optical via laterally surrounded by the metal via layer.
Abstract:
A lateral avalanche photodiode device comprises a semiconductor substrate (1) having a trench (4) with side walls (5) extending from a main surface (2) to a rear surface (3). A first doped region (11) is present at the side walls of the trench, and a second doped region (12) is arranged at a distance from the first doped region. A third doped region (13) is located adjacent to the first doped region, extends through the substrate from the main surface to the rear surface, and is arranged between the first doped region and the second doped region. The third doped region (13) is the avalanche multiplication region of the photodiode structure. The second doped region and the third doped region have a first type of conductivity, and the first doped region has a second type of conductivity which is opposite to the first type of conductivity. The region of the substrate that is between the first doped region and the second doped region is of the first type of conductivity.
Abstract:
The lateral single-photon avalanche diode comprises a semiconductor body (1, 2) comprising a semiconductor material of a first type of electric conductivity, a trench (3) in the semiconductor body, and anode and cathode terminals (5, 6). A junction region (14) of the first type of electric conductivity is located near the sidewall (38) of the trench, and the electric conductivity is higher in the junction region than at a farther distance from the sidewall. A semiconductor layer (4) of an opposite second type of electric conductivity is arranged at the sidewall of the trench adjacent to the junction region. The anode and cathode terminals are electrically connected with the semiconductor layer and with the junction region, respectively. The junction region (14) may be formed by a sidewall implantation.
Abstract:
The method comprises the steps of providing a semiconductor body or substrate (1) with a recess or trench (2) in a main surface (10), applying a mask (3) on the main surface, the mask covering the recess or trench, so that the walls and bottom of the recess or trench and the mask together enclose a cavity (4), which is filled with a gas, and forming at least one opening (5) in the mask at a distance from the recess or trench, the distance (6) being adapted to allow the gas to escape from the cavity via the opening when the gas pressure exceeds an external pressure.
Abstract:
A lateral single-photon avalanche diode comprises a semiconductor body (1) of a first type of conductivity which includes a base layer (10), a first further layer (11) on the base layer and a second further layer (12) on the first further layer. The base layer and the second further layer have an intrinsic doping or a doping concentration that is lower than the doping concentration of the first further layer. Thereby, the high electric field region or avalanche region is essentially confined to the first further layer (11). A doped region (5) of an opposite second type of conductivity is arranged in the semiconductor body, penetrates the first further layer and extends into the base layer and into the second further layer. Anode and cathode terminals (3, 4) are electrically connected to the first further layer and the doped region, respectively. The doped region can be produced by filling a trench (19) with doped polysilicon.
Abstract:
The photodiode device comprises a doped region (2) contiguous with a contact region (3) of the same conductivity type located at the substrate surface (1'), an appertaining anode or cathode connection (7, 11), a further contact region (5) of an opposite conductivity type at the substrate surface, and a further anode or cathode connection (8, 12). The contact region (3) is arranged at least on opposite sides of an active area of the substrate surface that covers the further contact region (5). A lateral pn junction (16) and an associated space charge region is formed at the substrate surface by a boundary of one of the contact regions, the boundary facing the other contact region. A field electrode (6) is arranged above the lateral pn junction, separated from the lateral pn junction by a dielectric material (10), and is provided with a further electrical connection (9, 13) separate from the anode and cathode connections. By the field electrode (6), the space charge region at the surface (1') is reduced and the peripheral dark current of the photodiode decreases considerably.
Abstract:
The semiconductor device comprises a substrate (1) of semiconductor material, a contact hole (2) reaching from a surface (10) into the substrate, and a contact metalization (12) arranged in the contact hole, so that the contact metalization forms an internal substrate contact (4) on the semiconductor material at least in a bottom area (40) of the contact hole.
Abstract:
Die Fotodiode besitzt einen p-leitend dotierten Bereich (2) und einen n-leitend dotierten Bereich (3) in einem Halbleiterkörper (1) sowie einen pn-Übergang (4) zwischen dem p-leitend dotierten Bereich und dem n-leitend dotierten Bereich. Der Halbleiterkörper besitzt eine Aussparung (5), so dass der pn-Übergang (4) einen Abstand (d) von höchstens 30 μm von dem Boden (7) der Aussparung aufweist.