Abstract:
PROBLEM TO BE SOLVED: To provide a trigate field effect transistor provided with a fin-shaped semiconductor body with a channel region and source/drain regions on either side of the channel region. SOLUTION: Thick gate dielectric layers separate the top surface and opposing sidewalls of the channel region from the gate conductor to suppress conductivity in the channel planes. A thin gate dielectric layer separates the upper corners of the channel region from the gate dielectric to optimize conductivity in the channel corners. To further emphasize the electric current in the channel corners, the source/drain regions can be formed only in the upper corners of the semiconductor body. Alternatively, source/drain extension regions can be formed only in the upper corners of the semiconductor body adjacent to the gate conductor and deep source/drain diffusion regions can be formed in the ends of the semiconductor body. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a device which is better capable of controlling threshold voltage in FET devices.SOLUTION: Provided are a field effect transistor (FET) and a method of forming the FET, the field effect transistor comprising: a substrate 101; a SiGe layer 103 over the substrate; a semiconductor layer 105 over the SiGe layer; an insulating layer 109a adjacent to the substrate, the SiGe layer, and the semiconductor layer; a pair of first gate structures 111 adjacent to the insulating layer; and a second gate structure 113 over the insulating layer. Preferably, the insulating layer is adjacent to a side surface of the SiGe layer, an upper surface of the semiconductor layer, a lower surface of the semiconductor layer, and a side surface of the semiconductor layer. Preferably, the SiGe layer comprises carbon. Preferably, the pair of first gate structures are substantially transverse to the second gate structure. Additionally, the pair of first gate structures are preferably encapsulated by the insulating layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a body contact hybrid surface semiconductor-on-insulator (HSSOI) device formed on a semiconductor-on-insulator (SOI) substrate, and a manufacturing method thereof. SOLUTION: A portion of a top semiconductor layer of the SOI substrate is patterned into a semiconductor fin 18 having substantially vertical sidewalls. A portion of a body region of the semiconductor fin is exposed on a top surface of the semiconductor fin between two source regions 62 having a doping of a conductivity type opposite to a body region 20 of the semiconductor fin. A metal semiconductor alloy portion 82 is formed directly on the two source regions and the top surface of the exposed body region between the two source regions. The doping concentration of the exposed top portion of the body region can be increased by ion implantation to provide a low-resistance contact to the body region, or a recombination region having a high-density of crystalline defects can be formed. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide band edge controlled Vt offset devices. SOLUTION: There are provided band edge controlled Vt offset devices, design structures for band edge controlled Vt offset devices and methods of manufacturing such structures. The structure includes a first FET having a channel of a first compound semiconductor of first atomic proportions resulting in a first band structure and a first type. The structure further includes a second FET having a channel of a second compound semiconductor of second atomic proportions resulting in a second band structure and a first type. The first compound semiconductor is different from the second compound semiconductor such that the first FET includes a first band structure different from second band structure, giving rise to a threshold voltage different from that of the second FET. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a semiconductor wafer structure which makes the interior of a wafer surface uniform in reflection factor, in order to acquire an uniform temperature change over a wafer whole region, when a rapid thermal annealing process of a semiconductor structure including a combination of different semiconductor materials is carried out. SOLUTION: In a semiconductor wafer structure in which a first device 401 includes epitaxial growth silicon germanium with a first reflection factor, and a second device 402 includes single crystal silicon with a second reflection factor, a uniform reflection factor is obtained by distributing a first device 451 as a non-functionality dummy including silicon germanium, and a second device 452 as a non-functionality dummy including single crystal silicon over the wafer whole region to obtain the same overall ratio and same density as a distribution of the first and the second device. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
A method of fabricating a vertical field effect transistor including forming a first recess in a substrate; epitaxially growing a first drain from the first bottom surface of the first recess; epitaxially growing a second drain from the second bottom surface of a second recess formed in the substrate; growing a channel material epitaxially on the first drain and the second drain; forming troughs in the channel material to form one or more fin channels on the first drain and one or more fin channels on the second drain, wherein the troughs over the first drain extend to the surface of the first drain, and the troughs over the second drain extend to the surface of the second drain; forming a gate structure on each of the one or more fin channels; and growing sources on each of the fin channels associated with the first and second drains.
Abstract:
A method of fabricating a vertical field effect transistor including forming a first recess (170) in a substrate (100); epitaxially growing a first drain (400) from the first bottom surface (190) of the first recess (170); epitaxially growing a second drain (600) from the second bottom surface (195) of a second recess (175) formed in the substrate (100); growing a channel material (700) epitaxially on the first drain (400) and the second drain (600); forming troughs (740) in the channel material (700) to form one or more fin channels (750) on the first drain (400) and one or more fin channels (750) on the second drain (600), wherein the troughs (740) over the first drain (400) extend to the surface of the first drain (400), and the troughs (740) over the second drain (600) extend to the surface of the second drain (600); forming a gate structure (1030) on each of the one or more fin channels (750); and growing sources (1520, 1540) on each of the fin channels (750) associated with the first drain (400) and the second drain (500).