摘要:
Die Erfindung betrifft eine Schottkydiode, die ein n + -Substrat, eine n-Epischicht, mindestens zwei in die n-Epischicht eingebrachte p-dotierte Gräben, Mesabereiche zwischen benachbarten Gräben, eine als Kathodenelektrode dienende Metallschicht und eine als Anodenelektrode dienende weitere Metallschicht aufweist. Die Dicke der Epischicht ist größer als das Vierfache der Tiefe der Gräben.
摘要:
A termination structure for a power transistor includes a semiconductor substrate having an active region and a termination region. The substrate has a first type of conductivity. A termination trench is located in the termination region and extends from a boundary of the active region to within a certain distance of an edge of the semiconductor substrate. A doped region has a second type of conductivity disposed in the substrate below the termination trench. A MOS gate is formed on a sidewall adjacent the boundary. The doped region extends from below a portion of the MOS gate spaced apart from the boundary toward a remote sidewall of the termination trench. A termination structure oxide layer is formed on the termination trench and covers a portion of the MOS gate and extends toward the edge of the substrate. A first conductive layer is formed on a backside surface of the semiconductor substrate. A second conductive layer is formed atop the active region, an exposed portion of the MOS gate, and extends to cover at least a portion of the termination structure oxide layer.
摘要:
The configuration and manufacture of various RESURF semiconductor devices are described. The devices comprise a semiconductor body (8) having first region (6, 18; 40, 46; 56, 64) of a first conductivity type and a peak field reducing structure (2, 16; 42, 44; 50, 52) which acts as a field plate dielectrically coupled to the first region and extends adjacent to the first region. The first region is more highly doped in a portion (18, 46, 64) adjoining the field reducing structure than in another portion further from the field reducing structure. The more highly doped portion of the first region serves to reduce the peak of the electric field adjacent to the field reducing structure of the RESURF device. The device may be in the form of a Schottky diode, a trenched pn-diode, a trenchFET, or a lateral configuration for example.
摘要:
A Schottky diode includes at least a trenched opened in a semiconductor substrate doped with a dopant of a first conductivity type wherein the trench is filled with a Schottky junction barrier metal. The Schottky diode further includes one or more dopant region of a second conductivity type surrounding sidewalk of the trench distributed along the depth of the trench for shielding a reverse leakage current through the sidewalk of the trench. The Schottky diode further includes a bottom-doped region of the second conductivity type surrounding a bottom surface of the trench and a top-doped region of the second conductivity type surrounding a top portion of the sidewalk of the trench. In a preferred embodiment, the first conductivity type k a N-type conductivity type and the middle-depth dopant region comprising a P-dopant region.
摘要:
A Schottky diode includes at least a trenched opened in a semiconductor substrate doped with a dopant of a first conductivity type wherein the trench is filled with a Schottky junction barrier metal. The Schottky diode further includes one or more dopant region of a second conductivity type surrounding sidewalk of the trench distributed along the depth of the trench for shielding a reverse leakage current through the sidewalk of the trench. The Schottky diode further includes a bottom-doped region of the second conductivity type surrounding a bottom surface of the trench and a top-doped region of the second conductivity type surrounding a top portion of the sidewalk of the trench. In a preferred embodiment, the first conductivity type k a N-type conductivity type and the middle-depth dopant region comprising a P-dopant region.