摘要:
A photodiode array is provided which includes a cell comprised of at least a substrate, an insulating film formed on the substrate, a semiconductor layer containing an impurity of first conductivity type and provided on the insulating film, an impurity-diffusion layer of second conductivity type formed in the semiconductor layer and reaching the insulating film, and at least one impurity-diffusion layer of the first conductivity type formed within the impurity-diffusion layer of the second conductivity type and reaching the insulating film, wherein pn junctions are defined between the layers of opposite conductivity types and arranged laterally, and of the pn junctions, any pn junction of a predetermined order are connected to each other in series. By virtue of this arrangement, the area of pn junctions per unit area of a substrate is increased thereby contributing to a reduction in chip size and in production cost.
摘要:
A voltage regulator diode according to the present invention comprises: a semiconductor substrate (W); a highly doped source region (3) formed in the substrate (W) to adjoin one surface thereof; a highly doped drain region (D) formed in tile substrate (W) to adjoin the above-mentioned surface; a source electrode (4) held in contact with the source region (3); a shorting electrode (9) held in contact with the drain region (D); a gate insulating portion (8a) formed between the source region (3) and the drain region (4) to partly cover the above-mentioned surface of the substrate (W); and a gate electrode (10) formed to cover the gate insulating portion (8a). The gate electrode (19) is shorted to the drain region (D) through the shorting electrode (9). As a result, a channel (12) is formed in the substrate (W) to establish conduction between the source region (3) and the drain region (4) when a gate voltage not less than a predetermined threshold value is applied.
摘要:
A method for producing a semiconductor device, is composed of steps of: covering a lower side of a semiconductor wafer with a heavy metal and disposing the semiconductor wafer in a chamber; causing the heavy metal to diffuse into the semiconductor wafer by heating the semiconductor wafer with a heat source having a small thermal capacity; and thereafter, ceasing to heat with the heat source, then charging the chamber with a cooling gas.
摘要:
A focus detecting apparatus having an optical device movable to cause the light from an object to be imaged on a predetermined plane and comparing the different imaged conditions of the light from the object on the predetermined plane comprises a light intensity distribution detecting device for detecting the distribution of the intensity of light on the predetermined plane and putting out a detection signal indicative of the distribution of the intensity of light on the predetermined plane, a device for taking out a high frequency component from the detection signal, a device for rectifying the taken out high frequency component, a device for forming the envelope of the rectified high frequency component, a device for integrating the envelope at any time and putting out an integrated value, and a focus detecting device for detecting, on the basis of the integrated value of the envelope, the amount of movement necessary for the imaging optical device to cause the light from the object to be imaged on the predetermined plane.
摘要:
A liquid discharge apparatus includes a head to discharge liquid onto a conveyed object, at least one light source to irradiate the conveyed object with light having a high relative intensity in a range of wavelength in which a relative reflectance of the liquid is high, and a detector including at least one optical sensor to perform imaging of the conveyed object being irradiated by the at least one light source, to generate data. The detector is configured to generate a detection result based on the data. The detection result including at least one of a conveyance amount of the conveyed object and a conveyance speed of the conveyed object.
摘要:
A conveyance device includes a conveyor to convey a conveyed object, a head unit to perform an operation on the conveyed object being conveyed at a first conveyance speed, a sensor to acquire data of the conveyed object, a gauge to output a measured travel amount of the conveyed object, and a processor. The processor includes a calculator to calculate a detection result including at least one of a position, a speed of travel, and a calculated travel amount of the conveyed object based on the data acquired by the sensor; and an adjusting unit to adjust a timing of acquisition of the data acquired while the conveyed object is conveyed at the first conveyance speed, based on the detection result and the measured travel amount of the conveyed object being conveyed at a second conveyance speed lower than the first conveyance speed.
摘要:
A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
摘要:
An image forming apparatus includes an image carrier; an image forming unit; a processor for controlling the image forming unit according to a predetermined image forming condition setting data; an image density sensor to detect an image density of the toner pattern formed on the image carrier; a reference rotary position detector; an image density fluctuation data acquisition unit to obtain an image density fluctuation data of more than one circumferential length of the photoreceptor drum with reference to the reference rotary position detected by the reference rotary position detector based on a result related to the toner pattern formed on the image carrier detected by the image density sensor; and a correction data generator to generate a correction data to correct a reference image forming condition setting data with a correction amount corresponding to each rotary position of the rotary member to thus reduce the image density fluctuation.
摘要:
An image forming apparatus includes a rotatable image carrier that carries a toner image having a length corresponding to at least a circumferential length of the carrier; an image density detector that detects a density of the image; a potential detector that detects, over at least the circumferential length, a surface potential of the carrier before toner adheres thereto; a first image forming device that adjusts the density with a first factor, and forms an image based on a first condition of the first factor; a second image forming device that adjusts the density with a second factor, and forms an image based on a second condition of the second factor; a first determining device that determines the first condition based on uneven density; and a second determining device that determines the second condition based on uneven density and a potential distribution of the surface potential.
摘要:
A disclosed to-be-transferred object length measurement device includes a first rotating body; a passage detection unit detecting a passage of the to-be-transferred object; a rotation amount measurement unit measuring a rotation amount of the first rotating body in a first measurement period; a second rotating body feeding the to-be-transferred object; a speed detection unit detecting a first feeding speed and a second feeding speed of the to-be-transferred object; and a calculation unit calculating a feeding distance of the to-be-transferred object per a predetermined rotation amount of the first rotating body based on the first feeding speed, and further calculating a length of the to-be-transferred object based on the rotation amount of the first rotating body in the first measurement period, the feeding distance, and the second feeding speed of the to-be-transferred object in the second measurement period.