摘要:
Provided is a memory circuit in which erroneous writing is less likely to occur at the time of power-on. A memory circuit (10) includes: a P-channel non-volatile memory element (15) for writing, to which a voltage is applied between a source and a drain thereof only during writing so as to write data; and an N-channel non-volatile memory element (16) for reading, which has a control gate and a floating gate provided in common to a control gate and a floating gate of the P-channel non-volatile memory element (15) and to which a voltage is applied to a source and a drain thereof only during reading so as to read the data.
摘要:
A high voltage operating field effect transistor has a source region and a drain region spaced apart from each other in a surface of a substrate. The source region is operative to receive at least one of a signal electric potential and a signal current. A semiconductor channel formation region is disposed in the surface of the substrate between the source region and the drain region. A gate region is disposed above the channel formation region and is operative to receive a bias electric potential having an absolute value equal to or larger than a first constant electric potential which changes according to an increase or decrease in a drain electric potential. A gate insulating film region is disposed between the channel formation region and the gate region.
摘要:
A high voltage operating field effect transistor has a substrate and a semiconductor channel formation region disposed in a surface of the substrate. A source region and a drain region are spaced apart from each other with the semiconductor channel formation region disposed between the source region and the drain region. A gate insulating film region is disposed on the semiconductor channel formation region. A resistive gate region is disposed on the gate insulating film region. A source side electrode is disposed on a source region side of the resistive gate region and is operative to receive a signal electric potential. A drain side electrode is disposed on a drain region side of the resistive gate region and is operative to receive a bias electric potential an absolute value of which is equal to or larger than that of a specified electric potential and which changes according to an increase or decrease in a drain electric potential.
摘要:
In a method of manufacturing a semiconductor integrated circuit device, a gate electrode is formed over a semiconductor substrate. An insulating film is then formed on the gate electrode and on regions corresponding to a source and a drain of the semiconductor integrated circuit device. The source and the drain are then formed. A nitride film is then selectively formed over the source and the gate electrode via the insulating film so that the nitride film extends over the gate electrode to a position short of a center of the gate electrode in a length direction thereof and so that a width of the nitride film is shorter than a channel width of the semiconductor integrated circuit device.
摘要:
Provided is a metal oxide semiconductor (MOS) capacitor, in which trenches (3) are formed in a charge accumulation region (6) of a p-type silicon substrate (1) to reduce a contact area between the p-type silicon substrate (1) and a lightly doped n-type well region (2), thereby reducing a leak current from the lightly doped n-type well region (2) to the p-type silicon substrate (1).
摘要:
A field effect transistor has an insulating substrate, a semiconductor thin film formed on the insulating substrate, and a gate insulating film on the semiconductor thin film. A first gate electrode is formed on the gate insulating film. A first region and a second region having a first conductivity type are formed on or in a surface of the semiconductor film on opposite sides of the first gate electrode in a length direction thereof. A third region having a second conductivity type opposite the first conductivity type is arranged on or in the semiconductor film side by side with the second region in a width direction of the first gate electrode. The third region and the second region are in contact with each other and make a low resistance junction. A second gate electrode is formed on the gate insulating film along the second region. A fourth region having the first conductivity type is formed on or in the semiconductor film on an opposite side of the second region with respect to the second gate electrode. One of the first and the fourth regions is used as an output region according to a circuit operation.
摘要:
Trench portions (10) are formed in a well (5) in order to provide unevenness in the well (5). A gate electrode (2) is formed via an insulating film (7) on the upper surface and inside of the trench portions (10). A source region (3) is formed on one side of the gate electrode (2) in a gate length direction while a drain region (4) on another side. Both of the source region (3) and the drain region (4) are formed down to near the bottom portion of the gate electrode (2). By deeply forming the source region (3) and the drain region (4), current uniformly flows through the whole trench portions (10), and the unevenness formed in the well (5) increase the effective gate width to decrease the on-resistance of a semiconductor device 1 and to enhance the drivability thereof.
摘要:
In a semiconductor integrated circuit device according to the present invention, source wiring metal is allowed to overlap a gate electrode of the MOS transistor, and an overlap amount in which the wiring metal overlaps the gate electrode in a channel width direction is made variable according to a pattern designing value, enabling multi-Vth integrated circuit without increasing the number of manufacturing steps.
摘要:
A semiconductor integrated circuit device is comprised of an amplifier circuit having first and second PMOS and NMOS transistors. The first PMOS transistor has a gate electrode and a drain electrode connected together. The second PMOS transistor has a gate electrode connected to the gate electrode of the first PMOS transistor and a course electrode connected to a course electrode of the first PMOS transistor. The first NMOS transistor has a drain electrode connected to the drain electrode of the first PMOS transistor and a gate electrode sat as a first input terminal. The second NMOS transistor has a drain electrode connected to a drain electrode of the second PMOS transistor, a source electrode connected to a sourse electrode of the first NMOS transistor, and a gate electrode sat as a second input terminal. At least one of the first NMOS transistor and the second NMOS transistor is comprised of a buried channel transistor.
摘要:
There is provided a manufacturing method using a structure capable of realizing a power management semiconductor device and an analog semiconductor device, in which low costs, short manufacturing periods, and low voltage operation are possible, which have low power consumption, high drive power, high grade function, and high accuracy. With respect to the power management semiconductor device and the analog semiconductor device which each include a CMOS transistor and a resistor, the manufacturing method is a method of obtaining a P-type polycide structure as a laminate structure of a P-type polycrystalline silicon film and a high melting point metallic silicide film for respective gate electrodes of an NMOS transistor and a PMOS transistor as divided by a conductivity type thereof in a CMOS transistor. In addition, a resistor used for a voltage dividing circuit and a CR circuit is formed by using a polycrystalline silicon film as a layer different from the gate electrode.