摘要:
A semiconductor memory device includes bodies electrically floating; sources; drains; gate electrodes, each of which is adjacent to one side surface of the one of the bodies via a gate dielectric film; plates, each of which is adjacent to the other side surface of the one of the bodies via a plate dielectric film; first bit lines on the drains, the first bit lines including a semiconductor with a same conductivity type as that of the drains; and emitters on the semiconductor of the first bit lines, the emitters including a semiconductor with an opposite conductivity type to that of the semiconductor of the first bit lines, wherein the emitters are stacked above the bodies and the drains.
摘要:
A memory includes a U-shape layer on a substrate; a first diffusion layer provided at an upper part of the U-shaped layer; a second diffusion layer provided at a lower part of the U-shaped layer; a body formed at an intermediate portion of the U-shaped layer between the first and the second diffusion layers; a first gate dielectric film provided on an outer side surface of the U-shaped layer; a first gate electrode provided on the first gate dielectric film; a second gate dielectric film provided on an inner side surface of the U-shaped layer; a second gate electrode provided on the second gate dielectric film; a bit line contact connecting the bit line to the first diffusion layer; a source line contact connecting the source line to the second diffusion layer, wherein cells adjacent in the first direction alternately share the bit line contact and the source line contact.
摘要:
This disclosure concerns a semiconductor memory device comprising a semiconductor substrate; a first dielectric film provided on the semiconductor substrate; two Fins provided on the first dielectric film and made of a semiconductor material; a second dielectric film provided on facing inner side surfaces among side surfaces of the two Fins; a third dielectric film provided on outer side surfaces among side surfaces of the two Fins; a gate electrode provided via the second dielectric film between the inner side surfaces of the two Fins; and a plate electrode provided via the third dielectric film on the outer side surfaces of the two Fins, wherein the two Fins, the gate electrode, and the plate electrode are included in one memory cell.
摘要:
A semiconductor device includes a substrate, a semiconductor layer of a first conductivity type having a single-crystal structure, and a plurality of transistors each including a first gate electrode provided above the semiconductor layer with a first gate insulation film laid therebetween, a pair of impurity regions of a second conductivity type being provided in the semiconductor layer and each becoming a source or drain region, and a channel body of the first conductivity type provided in the semiconductor layer at a portion between these impurity regions. The device also includes a first gate line for common connection of the first gate electrodes of the transistors, a dielectric layer provided above the substrate in an extension direction of the first gate line, for supporting the semiconductor layer under the pair of impurity regions to thereby dielectrically isolate between the substrate and the semiconductor layer, a second gate electrode provided above the substrate in such a manner as to underlie the channel bodies of the transistors and oppose the channel bodies with a second gate insulation film laid therebetween, the second gate electrode having a gate length larger than a onefold value of a gate length of the first gate electrode and yet less than or equal to thrice the gate length, and a second gate line provided above the substrate along the extension direction of the first gate line while being placed between portions of the dielectric layer underlying the pair of impurity regions, the second gate line being for common connection of the second gate electrode.
摘要:
A semiconductor memory device includes a supporting substrate including semiconductor materials. The memory device also includes an insulation film provided above the supporting substrate. The memory device further includes a first diffusion layer provided on the insulation film. In addition, the memory device includes a second diffusion layer provided on the insulation film. The memory device additionally includes a body region provided between the first diffusion layer and the second diffusion layer. The body region is in an electrically floating state and accumulates or releases electric charges for storing data. Also, the memory device includes a semiconductor layer penetrating the insulation film and electrically connecting the second diffusion layer to the supporting substrate to release electric charges from the second diffusion layer. Further, the memory device includes a gate insulation film provided on the body region. Additionally, the memory device includes a gate electrode provided on the gate insulation film.
摘要:
A semiconductor memory device includes bodies electrically floating; sources; drains; gate electrodes, each of which is adjacent to one side surface of the one of the bodies via a gate dielectric film; plates, each of which is adjacent to the other side surface of the one of the bodies via a plate dielectric film; first bit lines on the drains, the first bit lines including a semiconductor with a same conductivity type as that of the drains; and emitters on the semiconductor of the first bit lines, the emitters including a semiconductor with an opposite conductivity type to that of the semiconductor of the first bit lines, wherein the emitters are stacked above the bodies and the drains.
摘要:
This disclosure concerns a memory comprising a charge trapping film; a gate insulating film; a back gate on the charge trapping film; a front gate on the gate insulating film; and a body region provided between a drain and a source, wherein the memory includes a first storage state for storing data depending on the number of majority carriers in the body region and a second storage state for storing data depending on the amount of charges in the charge trapping film, and the memory is shifted from the first storage state to the second storage state by converting the number of majority carriers in the body region into the amount of charges in the charge trapping film or from the second storage state to the first storage state by converting the amount of charges in the charge trapping film into the number of majority carriers in the body region.
摘要:
A semiconductor memory device includes transistors, each including a first-conductivity-type semiconductor layer formed on a semiconductor substrate via a first insulating film, a second-conductivity-type source/drain regions formed in the semiconductor layer, a first-conductivity-type body region formed between the source region and the drain region in the semiconductor layer, the body region being electrically floating, and a gate electrode formed on a surface of a central portion of the body region via a second insulating film. In a section along a word line, which connects the gate electrodes together, a length of a boundary between the central portion of the body region and the second insulating film is smaller than a length of a boundary between the body region and the first insulating film. A second-conductivity-type counter impurity is doped in a surface portion of the central portion of the body region on which the second insulating film is formed.
摘要:
According to the present invention, there is provided a semiconductor device comprising: a plurality of transistors each having a semiconductor substrate, a first-conductivity-type semiconductor layer formed on said semiconductor substrate via a first insulating film, and having a single-crystal structure, a second-conductivity-type source region and second-conductivity-type drain region formed in said semiconductor layer, a first-conductivity-type body region formed between said source region and said drain region in said semiconductor layer, and electrically floating, and a gate electrode formed on a central portion of a surface of said body region via a second insulating film; an element isolation insulating film which isolates said body regions in adjacent transistors of said plurality of transistors; a word line which connects said gate electrodes of said plurality of transistors together; a bit line electrically connected to said drain region; and a source line electrically connected to said source region, wherein in a section along said word line, an area in which said body region contacts said second insulating film is smaller than an area in which said body region contacts said first insulating film.
摘要:
In a lateral bipolar transistor, its emitter region, base region, link base region, and so forth, are made in self alignment with side walls of masks by using partly overlapping two mask patterns. Therefore, not relying on the mask alignment accuracy, these regions are made in a precisely controlled positional relation. Thus, the lateral bipolar transistor, thus obtained, is reduced in parasitic resistance of the base and parasitic junction capacitance between the emitter and the base, and alleviated in variance of characteristics caused by fluctuation of the length of a link base region, length of the emitter-base junction and relative positions of the emitter and the collector, and can be manufactured with a high reproducibility.