摘要:
In the method for fabricating a semiconductor device of the present invention, a collector layer (102) of a first conductivity type is formed in a region of a semiconductor substrate (100) sandwiched by device isolation. A collector opening (110) is formed through a first insulating layer (108) deposited on the semiconductor substrate (100) so that the range of the collector opening (110) covers the collector layer (102) and part of the device isolation. A semiconductor layer of a second conductivity type (111) as an external base is formed on a portion of the semiconductor substrate located inside the collector opening (110), while junction leak prevention layers of the same conductivity type as the external base are formed in the semiconductor substrate. Thus, the active region is narrower than the collector opening reducing the transistor area, while minimizing junction leak.
摘要:
A variable capacitor includes an N + layer including a variable capacitance region, a P + layer epitaxially grown on the N + layer and formed from a SiGe film and a Si film, and a P-type electrode. An NPN-HBT (Hetero-junction Bipolar Transistor) includes a collector diffusion layer formed simultaneously with the N + layer of the variable capacitor, a collector layer, and a Si/SiGe layer epitaxially grown simultaneously with the P + layer of the variable capacitor. Since a depletion layer formed in a PN junction of the variable capacitor can extend entirely across the N + layer, reduction in variation range of the capacitance can be suppressed.
摘要:
In the method for fabricating a semiconductor device of the present invention, a collector layer of a first conductivity type is formed in a region of a semiconductor substrate sandwiched by device isolation. A collector opening is formed through a first insulating layer deposited on the semiconductor substrate so that the range of the collector opening covers the collector layer and part of the device isolation. A semiconductor layer of a second conductivity type as an external base is formed on a portion of the semiconductor substrate located inside the collector opening, while junction leak prevention layers of the same conductivity type as the external base are formed in the semiconductor substrate. Thus, the active region is narrower than the collector opening reducing the transistor area, while minimizing junction leak.
摘要:
An Si 1-y Ge y layer (where 0 1-y Ge y layers. Since C is contained in the Si layer, movement, diffusion and segregation of Ge atoms in the Si 1-y Ge y layer can be suppressed. As a result, the Si/Si 1-y Ge y interface can have its structural disorder eased and can be kept definite and planar. Thus, the mobility of carriers moving along the interface in the channel can be increased. That is to say, the thermal budget of the semiconductor device during annealing can be improved. Also, by grading the concentration profile of C, the diffusion of C into the gate insulating film can be suppressed and decline in reliability can be prevented.
摘要:
A variable capacitor includes an N + layer including a variable capacitance region, a P + layer epitaxially grown on the N + layer and formed from a SiGe film and a Si film, and a P-type electrode. An NPN-HBT (Hetero-junction Bipolar Transistor) includes a collector diffusion layer formed simultaneously with the N + layer of the variable capacitor, a collector layer, and a Si/SiGe layer epitaxially grown simultaneously with the P + layer of the variable capacitor. Since a depletion layer formed in a PN junction of the variable capacitor can extend entirely across the N + layer, reduction in variation range of the capacitance can be suppressed.
摘要:
In the method for fabricating a semiconductor device of the present invention, a collector layer of a first conductivity type is formed in a region of a semiconductor substrate sandwiched by device isolation. A collector opening is formed through a first insulating layer deposited on the semiconductor substrate so that the range of the collector opening covers the collector layer and part of the device isolation. A semiconductor layer of a second conductivity type as an external base is formed on a portion of the semiconductor substrate located inside the collector opening, while junction leak prevention layers of the same conductivity type as the external base are formed in the semiconductor substrate. Thus, the active region is narrower than the collector opening reducing the transistor area, while minimizing junction leak.
摘要:
Immediately after a Si/SiGe film containing a contaminant is formed over all surfaces of a substrate by epitaxial growth, a portion of the Si/SiGe film formed to the back surface side of the substrate is removed by wet etching. In addition, the Si/SiGe film is subjected to processing with heating in a container, after which a dummy run is carried out in the container. These processings prevent secondary wafer contamination through a stage, a robot arm or a vacuum wand for handling a wafer and the contamination of the container also used in the fabrication process of a semiconductor device free from any group IV element but Si.
摘要:
An Si 1-y Ge y layer (where 0 1-y Ge y layers. Since C is contained in the Si layer, movement, diffusion and segregation of Ge atoms in the Si 1-y Ge y layer can be suppressed. As a result, the Si/Si 1-y Ge y interface can have its structural disorder eased and can be kept definite and planar. Thus, the mobility of carriers moving along the interface in the channel can be increased. That is to say, the thermal budget of the semiconductor device during annealing can be improved. Also, by grading the concentration profile of C, the diffusion of C into the gate insulating film can be suppressed and decline in reliability can be prevented.
摘要:
Immediately after a Si/SiGe film containing a contaminant is formed over all surfaces of a substrate by epitaxial growth, a portion of the Si/SiGe film formed to the back surface side of the substrate is removed by wet etching. In addition, the Si/SiGe film is subjected to processing with heating in a container, after which a dummy run is carried out in the container. These processings prevent secondary wafer contamination through a stage, a robot arm or a vacuum wand for handling a wafer and the contamination of the container also used in the fabrication process of a semiconductor device free from any group IV element but Si.