摘要:
A semiconductor device has an FET of a trench-gate structure obtained by disposing a conductive layer, which will be a gate, in a trench extended in the main surface of a semiconductor substrate, wherein the upper surface of the trench-gate conductive layer is formed equal to or higher than the main surface of the semiconductor substrate. The conductive layer of the trench gate is formed to have a substantially flat or concave upper surface and the upper surface is formed equal to or higher than the main surface of the semiconductor substrate. After etching of the semiconductor substrate to form the upper surface of the conductive layer of the trench gate, a channel region and a source region are formed by ion implantation so that the semiconductor device is free from occurrence of a source offset.
摘要:
An electronic apparatus provided with a serial communication circuit achieving a baud rate adjustment with high precision is provided. For example, a bit width of each of a plurality of bits in received serial data is measured by a clock counter, and an average value of the bit width is calculated detecting its maximum value and minimum value. Moreover, for example, a maximum tolerance and a minimum tolerance are calculated as a value substantially 1.5 times the average value and a value substantially 0.5 times the average value, and determination is made as to whether or not the maximum value and the minimum value are within a range between the maximum tolerance and the minimum tolerance. If they are within the range, the corresponding average value is set in a baud rate setting register.
摘要:
A technology capable of reducing load on both system processing and filter operation and improving power consumption and performance is provided. In a digital signal processor, a program memory, a program counter, and a control logic circuit are provided, and a bit field of each instruction includes instruction stop flag information and bit field information. Also, the control logic circuit carries out the control in such a manner that the instruction whose instruction stop flag information is cleared is executed as is to proceed to the next instruction processing, execution of the instruction whose instruction stop flag information is set is stopped if an execution resumption trigger condition corresponding to the bit field information is not satisfied, and the instruction whose instruction stop flag information is set is executed if the execution resumption trigger condition corresponding to bit field information is satisfied, to proceed to the next instruction processing.
摘要:
In a sense circuit for DRAM memory cell a switch is provided between the bit line BL and local bit line LBL connected to the memory cells for isolation and coupling of these bit lines. The bit line BL is precharged to the voltage of VDL/2, while the local bit line LBL is precharged to the voltage of VDL. VDL is the maximum amplitude voltage of the bit line BL. A sense amplifier SA comprises a first circuit including a differential MOS pair having the gate connected to the bit line BL and a second circuit connected to the local bit line LBL for full amplitude amplification and for holding the data. When the bit line BL and local bit line LBL are capacitance-coupled via a capacitor, it is recommended to use a latch type sense amplifier SA connected to the local bit line LBL.
摘要:
In order to prevent the contamination of wafers made of a transition metal in a semiconductor mass production process, the mass production method of a semiconductor integrated circuit device of the invention comprises the steps of depositing an Ru film on individual wafers passing through a wafer process, removing the Ru film from outer edge portions of a device side and a back side of individual wafers, on which said Ru film has been deposited, by means of an aqueous solution containing orthoperiodic acid and nitric acid, and subjecting said individual wafers, from which said Ru film has been removed, to a lithographic step, an inspection step or a thermal treating step that is in common use relation with a plurality of wafers belonging to lower layer steps (an initial element formation step and a wiring step prior to the formation of a gate insulating film).
摘要:
In a level conversion circuit mounted in an integrated circuit device using a plurality of high- and low-voltage power supplies, the input to the differential inputs are provided. In a level-down circuit, MOS transistors that are not supplied with 3.3 V between the gate and drain and between the gate and source use a thin oxide layer. In a level-up circuit, a logic operation function is provided.
摘要:
In a method of fabricating a semiconductor device having a MISFET of trench gate structure, a trench is formed from a major surface of a semiconductor layer of first conductivity type which serves as a drain region, in a depth direction of the direction of the semiconductor layer, a gate insulating film including a thermal oxide film and a deposited film is formed over the internal surface of the trench, and after a gate electrode has been formed in the trench, impurities are introduced into the semiconductor substrate of first conductivity type to form a semiconductor region of second conductivity type which serves as a channel forming region, and impurities are introduced into the semiconductor region of second conductivity type to form the semiconductor region of first conductivity type which serves as a source region.
摘要:
In order to prevent the contamination of wafers made of a transition metal in a semiconductor mass production process, the mass production method of a semiconductor integrated circuit device of the invention comprises the steps of depositing an Ru film on individual wafers passing through a wafer process, removing the Ru film from outer edge portions of a device side and a back side of individual wafers, on which said Ru film has been deposited, by means of an aqueous solution containing orthoperiodic acid and nitric acid, and subjecting said individual wafers, from which said Ru film has been removed, to a lithographic step, an inspection step or a thermal treating step that is in common use relation with a plurality of wafers belonging to lower layer steps (an initial element formation step and a wiring step prior to the formation of a gate insulating film).
摘要:
A memory card has a plurality of non-volatile memories and a main controller for controlling the operation of the non-volatile memories. The main controller performs an access control to the non-volatile memories in response to an external access instruction, and an alternate control for alternating an access error-related storage area of the non-volatile memory with other storage area. In the access control, the speeding up of the data transfer between flash memories is achieved by causing the plurality of non-volatile memories to parallel access operate. In the alternation control, the storage areas is made alternative for each non-volatile memory in which an access error occurs.
摘要:
A semiconductor device includes a lower substrate, a thin semiconductor layer and an insulating layer formed between the lower substrate and the semiconductor layer. An active transistor area is formed with a base formed along a surface of the semiconductor layer, an emitter region formed in the base, a buried collector in the thin semiconductor layer to contact the insulating layer, a collector contacting the buried collector, and emitter, collector and base contacts. The active transistor area is configured to operate at an emitter current at least in the order of mA (milli-ampere). An isolation trench extends through the semiconductor layer to the insulating layer and surrounds the active transistor area with a distance in the order of μm (micron) from the active transistor area and with a space area of more than 50 μm2 between the active transistor area and the isolation trench.