Abstract:
A method for producing an organolithium compound includes the step of reacting an aromatic compound or a halogenated unsaturated aliphatic compound and a lithiating agent in the presence of a coordinating compound containing three or more elements having a coordinating ability in a molecule, at least one thereof being a nitrogen element, or a coordinating compound containing three or more oxygen elements having a coordinating ability in a molecule, at least one of the groups containing the oxygen elements having a coordinating ability being a tertiary alkoxy group, at a temperature of −40° C. to 40° C.
Abstract:
An information management apparatus includes a processor, and a memory configured to store computer-readable instructions. The instructions instruct the information management apparatus to execute steps including acquiring stroke data of a trajectory of an approaching writing device detected by a detection portion capable of detecting the trajectory and including data of the trajectory of the writing device corresponding to schedule information written on a paper medium, generating image data of the trajectory based on the acquired stroke data, generating text data based on the acquired stroke data, and registering and managing the schedule information identified from the text data and the image data.
Abstract:
One object of the present invention is to provide a regulator circuit with an improved noise margin. In a regulator circuit including a bias circuit generating a reference voltage on the basis of the potential difference between a first power supply terminal and a second power supply terminal, and a voltage regulator outputting a potential to an output terminal on the basis of a reference potential input from the bias circuit, a bypass capacitor is provided between a power supply terminal and a node to which a gate of a transistor included in the bias circuit is connected.
Abstract:
A semiconductor device including a nonvolatile memory cell including a writing transistor which includes an oxide semiconductor, a reading transistor which includes a semiconductor material different from that of the writing transistor, and a capacitor is provided. Data is written to the memory cell by turning on the writing transistor and supplying a potential to a node where a source electrode (or a drain electrode) of the writing transistor, one electrode of the capacitor, and a gate electrode of the reading transistor are electrically connected to each other, and then turning off the writing transistor so that a predetermined amount of charge is held at the node. Further, when a p-channel transistor is used as the reading transistor, a reading potential is a positive potential.
Abstract:
A semiconductor device with a novel structure is provided, which can hold stored data even when no power is supplied and which has no limitations on the number of writing operations. A semiconductor device is formed using a material which enables off-state current of a transistor to be reduced significantly; e.g., an oxide semiconductor material which is a wide-gap semiconductor. With use of a semiconductor material which enables off-state current of a transistor to be reduced significantly, the semiconductor device can hold data for a long period. In a semiconductor device with a memory cell array, parasitic capacitances generated in the nodes of the first to the m-th memory cells connected in series are substantially equal, whereby the semiconductor device can operate stably.
Abstract:
An object is to provide a semiconductor device with a novel structure, which can hold stored data even when power is not supplied and which has an unlimited number of write cycles. The semiconductor device is formed using a memory cell including a wide band gap semiconductor such as an oxide semiconductor. The semiconductor device includes a potential change circuit having a function of outputting a potential lower than a reference potential for reading data from the memory cell. When the wide band gap semiconductor which allows a sufficient reduction in off-state current of a transistor included in the memory cell is used, a semiconductor device which can hold data for a long period can be provided.
Abstract:
An object is to provide a semiconductor device having a novel structure, which can hold stored data even when not powered and which has an unlimited number of write cycles. A semiconductor device includes a memory cell including a widegap semiconductor, for example, an oxide semiconductor. The memory cell includes a writing transistor, a reading transistor, and a selecting transistor. Using a widegap semiconductor, a semiconductor device capable of sufficiently reducing the off-state current of a transistor included in a memory cell and holding data for a long time can be provided.
Abstract:
A semiconductor device includes a nonvolatile memory cell including a writing transistor including an oxide semiconductor, a reading transistor including a semiconductor material different from that of the writing transistor, and a capacitor. Data is written to the memory cell by turning on the writing transistor so that a potential is supplied to a node where a source electrode of the writing transistor, one electrode of the capacitor, and a gate electrode of the reading transistor are electrically connected, and then turning off the writing transistor so that a predetermined potential is held in the node. Data is read out from the memory cell by supplying a precharge potential to a bit line, stopping the supply of the potential to the bit line, and determining whether the potential of the bit line is kept at the precharge potential or decreased.
Abstract:
A first vertex of a first single-crystal silicon carbide substrate and a second vertex of a second single-crystal silicon carbide substrate abut each other such that a first side of the first single-crystal silicon carbide substrate and a second side of the second single-crystal silicon carbide substrate are aligned. In addition, at least a part of the first side and at least a part of the second side abut on a third side of a third single-crystal silicon carbide substrate. Thus, in manufacturing a semiconductor device including a composite substrate, process fluctuations caused by a gap between the single-crystal silicon carbide substrates can be suppressed.
Abstract:
There are disclosed a water-absorbent resin composition and its production process, wherein the water-absorbent resin composition causes little gel-blocking and is excellent in the liquid permeability and liquid diffusibility and is high also in the absorption performances and further is strong also against the physical damage; and there are further disclosed a water-absorbent resin composition and its production process, wherein the water-absorbent resin composition has the following further advantages, in addition to the above, of involving little segregation of the metal compound and further having a dust prevention effect. One of water-absorbent resin compositions according to the present invention is a water-absorbent resin composition comprising water-absorbent resin particles obtained by polymerizing a monomer including acrylic acid and/or its salt, with the composition having a mass-average particle diameter of 100 to 600 μm and comprising water-soluble polyvalent metal salt particles and the water-absorbent resin particles that have been surface-crosslinked.