摘要:
A channel region (2), a source region (3) and a drain region (4) are formed on a polycrystalline semiconductor layer (1). The characteristic of a polycrystalline TFT (101) is dispersed by the amount of crystal grain boundaries (6) contained in the channel region (2). A drain current is reduced as the amount of the crystal grain boundaries (6) contained in the channel region (2) is increased. In order to utilize a code obtained by encoding the electric characteristic of the TFT (101) for identification of a semiconductor chip, a system or the like, the TFT (101) is mounted on the semiconductor chip, the system or the like along with an encoder circuit. Thus, a barrier against illegal use of a user terminal is improved at a low cost.
摘要:
A semiconductor device that prevents metal pollution and a method of manufacturing the semiconductor device. A region (NR) and a region (PR) are defined by a trench isolation oxide film, a polysilicon film selectively provided on the trench isolation oxide film, a silicon layer provided on the polysilicon film, and a side wall spacer provided on a side surface of the polysilicon film. The polysilicon film is provided in a position corresponding to a top of a PN junction portion JP of a P-type well region and an N-type well region in a SOI layer across the two well regions.
摘要:
A semiconductor device comprising an SOI substrate fabricated by forming a silicon layer 3 on an insulating layer 2, a plurality of active regions 3 horizontally arranged in the silicon layer 3, and element isolating parts 5 having a trench-like shape which is made of an insulator 5 embedded between the active regions 3 in the silicon layer 3, wherein the insulating layer 2 has spaces 6 positioned in the vicinity of interfaces between the active regions and the element isolating parts 5, whereby it becomes possible to reduce fixed charges or holes existing on a side of the insulating layer in interfaces between the silicon layer and the insulating layer, which fixed charges or holes are generated in a process of oxidation for forming the insulating layer on a bottom surface of the silicon layer.
摘要:
A semiconductor substrate and a method of fabricating a semiconductor device are provided. An oxide film (13) is formed by oxidizing an edge section and a lower major surface of an SOI substrate (10). This oxidizing step is performed in a manner similar to LOCOS (Local Oxide of Silicon) oxidation by using an oxide film (11) exposed on the edge section and lower major surface of the SOI substrate (10) as an underlying oxide film. Then, the thickness of the oxide film (13) is greater than that of the oxide film (11) on the edge section and lower major surface of the SOI substrate (10). The semiconductor substrate prevents particles of dust from being produced at the edge thereof.
摘要:
At an edge portion of an FS gate electrode (10) beneath a side wall oxide film (106), an FS gate oxide film (101) is thicker. Relative to a surface of a silicon substrate (SB) beneath the FS gate oxide film (101), other surface of the silicon substrate (SB) is retracted. Thus, a MOS transistor with field-shield isolation structure and a method for manufacturing the same can be provided with higher reliability of the gate oxide film.
摘要:
On an insulating film a mesa-isolation silicon layer is formed, in which a channel region and source/drain regions ar included. A gate insulating film and a conducting layer as a part of a gate electrode are stacked on the mesa-isolation silicon layer. A sidewall of an insulating material is formed on side surfaces of the mesa-isolation silicon layer, gate insulating film, and conducting layer at an end portion of the channel region of the mesa-isolation silicon layer, and a gate electrode is formed on the conducting layer.
摘要:
This invention provides a semiconductor device with a SOI structure and a method of manufacturing the same, preventing deterioration in and making improvement in device characteristics. Nitrogen ion implantation into NMOS and PMOS regions (NR, PR) with resists (22b) and (22c) as masks, respectively, introduces nitrogen ions into channel doped layers (31). The subsequent thermal treatment provides a structure with the channel doped layers (31) containing nitrogen having a prescribed concentration distribution in the depth direction.
摘要:
A semiconductor substrate and a method of fabricating a semiconductor device are provided. An oxide film (13) is formed by oxidizing an edge section and a lower major surface of an SOI substrate (10). This oxidizing step is performed in a manner similar to LOCOS (Local Oxide of Silicon) oxidation by using an oxide film (11) exposed on the edge section and lower major surface of the SOI substrate (10) as an underlying oxide film. Then, the thickness of the oxide film (13) is greater than that of the oxide film (11) on the edge section and lower major surface of the SOI substrate (10). The semiconductor substrate prevents particles of dust from being produced at the edge thereof.
摘要:
This invention provides a semiconductor device with a SOI structure and a method of manufacturing the same, preventing deterioration in and making improvement in device characteristics. Nitrogen ion implantation into NMOS and PMOS regions (NR, PR) with resists (22b) and (22c) as masks, respectively, introduces nitrogen ions into channel doped layers (31). The subsequent thermal treatment provides a structure with the channel doped layers (31) containing nitrogen having a prescribed concentration distribution in the depth direction.
摘要:
The present invention provides a three-dimensional shape measuring device and a sensor employed for the three-dimensional shape measuring device. The three-dimensional shape measuring device comprises a light source for scanning plane light over the surface of an object, an image sensor opposed to the object and provided with a plurality of pixels, an optical system for forming an image of a bright line appearing on the surface of the object due to plane light on the image sensor, a plurality of capacitors installed in association with pixels of the image sensor, a charger for storing given charges in a plurality of capacitors before plane light scanning starts, a plurality of dischargers lying in association with capacitors and gradually discharging the capacitors for pixels corresponding to a bright line image from when plane light scanning starts until the bright line image passes through the pixels, and an arithmetic logic means for computing charges remaining in the plurality of capacitors after plane light scanning is completed and thus providing a three-dimensional shape of an object. Thereby, a three-dimensional shape of an object can be measured at a high speed with high precision.