摘要:
In a ferroelectric capacitor, two displacements (points b and c) of a remanent polarization correspond to data “1” and one displacement (point a) of the remanent polarization corresponds to data “0”. When the data “1” is written, either of two electric voltage pulses different in potential or in pulse width is applied to the ferroelectric capacitor to position the displacement of the remanent polarization in the ferroelectric capacitor at the point b or at the point c. When the data “0” is written, on the other hand, the displacement of the remanent polarization in the ferroelectric capacitor is positioned at the point a.
摘要:
A semiconductor memory device has a plurality of memory cells each having a first ferroelectric capacitor for storing data as a polarization value. First voltage applying means applies a first read voltage between the pair of electrodes of the first ferroelectric capacitor composing that one of the plurality of memory cells from which data is to be read. Data reading means detects the polarization value in the first ferroelectric capacitor when the first read voltage is applied between the pair of electrodes of the first ferroelectric capacitor and thereby reads the data stored in the first ferroelectric capacitor therefrom. A hysteresis loop in the first ferroelectric capacitor is shifted in a direction of voltage opposite in polarity to the first read voltage.
摘要:
A semiconductor memory of this invention is composed of an MFMIS transistor including a first field effect transistor and a ferroelectric capacitor formed on or above the first field effect transistor with a gate electrode of the first field effect transistor working as or being electrically connected to a lower electrode of the ferroelectric capacitor, an upper electrode of the ferroelectric capacitor working as a control gate and the first field effect transistor having a first well region; and a second field effect transistor having a second well region that is isolated from the first well region of the first field effect transistor. The first well region of the first field effect transistor is electrically connected to the source region of the second field effect transistor, and the gate electrode of the first field effect transistor is electrically connected to the drain region of the second field effect transistor.
摘要:
The multi-layered heat resistant metal tube is disclosed. This tube has excellent anti-coking characteristics and is suitable for use under the conditions where carbon tends to deposit and accumulate thereon due to contacting with hydrocarbons at a high temperature. The tube is made by forming weld-mounted overlaid layer of Cr—Ni alloy by building-up welding over the inner surface and/or the outer surface of a substrate tube made of a heat resistant metal. The Cr—Ni alloy comprises 35% by weight or more of Cr and satisfies the relationship: Ni(w%)≧0.5Cr(wt %). Building-up welding is preferably carried out by PPW (Plasma Powder Welding) in which the filler metal is supplied in the form of powder.
摘要:
A semiconductor memory includes a storing transistor for storing data, wherein the storing transistor includes an MFS transistor, an MFIS transistor, or an MFMIS transistor, and a selecting transistor for selecting the storing transistor. The storing transistor is a first field effect transistor having a first well region. The selecting transistor is second field effect transistor having a second well region that is isolated from the first well region of the first field effect transistor. The semiconductor memory further includes a first voltage supply line for supplying a DC voltage to the first well region of the first field effect transistor, and a second voltage supply line, independent of the first voltage supply line, for supplying a DC voltage to the second well region of the second field effect transistor.
摘要:
A multi-valued data is written in a ferroelectric capacitor, which stores a multi-valued data in accordance with displacement of polarization of a ferroelectric film thereof, by applying a relatively high first writing voltage or a relatively low second writing voltage between a first electrode and a second electrode of the ferroelectric capacitor. Next, a potential difference induced between the first and second electrodes is removed. Then, the multi-valued data is read by detecting the displacement of the polarization of the ferroelectric film by applying a reading voltage between the second electrode and a substrate where a reading FET for detecting the displacement of the polarization of the ferroelectric film is formed. The reading voltage has the same polarity as the first writing voltage and is set to such magnitude that, in applying the reading voltage, a first potential difference induced between the gate electrode of the reading FET and the substrate when the multi-valued data is written by applying the first writing voltage is smaller than a second potential difference induced between the gate electrode and the substrate when the multi-valued data is written by applying the second writing voltage.
摘要:
A supporting structure of a pedal device for a vehicle, comprising: a pedal bracket fixed to a vehicle body so as to support a rotating shaft portion of a suspended type pedal device for a vehicle; and a displacement controlling device coupled to a rear end portion of the pedal bracket so as to control the displacement of a stepping surface of the pedal device for a vehicle as a result of displacement of the displacement controlling device substantially in a downward direction of the vehicle by an external force of a predetermined value or greater which is applied to a front portion of the vehicle.
摘要:
A process for preparing an alloy having excellent corrosion resistance and abrasion resistance is provided. The alloy is prepared by providing a powder mixture or VC-powder-containing wire having a matrix metal, including a VC powder having a particle diameter of 10 .mu.m or less, and at least one member selected from the group consisting of an Fe-base alloy, a Co-base alloy and a Ni-base alloy. The powder mixture or VC-powder-containing wire is melted with a heat source having a high energy density. The resultant melt is then cooled to homogeneously crystallize and/or precipitate VC, such that the particle diameter of the VC is reduced to 5 .mu.m or less in the matrix metal phase. Also disclosed is a process for preparing a surface-modified metallic member from a metallic member and an alloy prepared from the aforementioned process.
摘要:
An apparatus for indicating a strike at bowling alleys has a display board provided with a plurality of displays adapted to show a plurality of symbols thereon, a detector adapted to detect the occurrence of a strike, a microcomputer adapted to determine a several-digit number at random in accordance with an output from the detector, and a lighting circuit adapted to show numerals on the display board in accordance with numeric signals from the microcomputer. The microcomputer outputs random numeric signals successively to the lighting circuit with the microcomputer has received an output from the detector, to show numerals on the display board so that the numerals look as if they were rotated, and the outputting of the numeric signals to the lighting circuit is continued so as to show after the lapse of a predetermined period of time the determined numerals on the displays on the display board in order at predetermined time intervals.