摘要:
A plurality of recesses are provided on a first main surface of an n-type semiconductor region of a semiconductor chip forming a constant voltage diode, and a p++-type semiconductor region is provided on the first main surface including inner faces of the plurality of recesses. Thereby, a portion of a depletion layer width with high voltage dependency and a portion thereof with low voltage dependency can be provided at a p-n junction portion of the constant voltage diode formed by the p++-type semiconductor region and the n-type semiconductor region. As a result, a leakage current can be reduced in a blocking state where a breakdown voltage of the p-n junction portion of the constant voltage diode is set to be low. Accordingly, a leakage current of a constant voltage diode can be lowered.
摘要:
Providing a technology capable of obtaining a desired resistance value through preferable controllability, and improving linearity between voltage and current. A semiconductor bulk resistance element of the present invention comprise a semiconductor chip having a main surface (first main surface), and on the first main surface of a semiconductor resistor layer (an n−type semiconductor region) to work as a bulk resistor, a guard ring layer (a p+ type semiconductor region) of a conductive type opposite to the semiconductor resistor layer is formed, and a contact layer (an n++ type semiconductor region) that goes through the guard ring layer and is of a conductive type same as the semiconductor resistor layer, has a higher impurity concentration than that of the semiconductor resistor layer and the guard ring layer is formed, and on the top of the contact layer and at the bottom of the semiconductor resistor layer, semiconductor regions (n++ type semiconductor regions) that have ohmic contact with electrodes and are of a conductive type same as the semiconductor resistor layer, and has an impurity concentration same as or higher than that of the contact layer are adjacently arranged respectively.
摘要:
A Transfer device (10) includes an intermediate transfer belt (41), a plurality of intermediate transfer roller (34A-34D) and a transfer member moving mechanism (20). The transfer member moving mechanism moves the intermediate transfer rollers (34A-34D) between pressing positions causing the intermediate transfer belt (41) to be pressed against respective photoreceptor drums (31A-31D) and separate positions causing the intermediate transfer belt (41) to be separate from the respective photoreceptor drums (31A-31D). The transfer member moving mechanism (20) causes a second pressing position of the intermediate transfer roller for monochrome (34A) in monochromatic image forming to be different from a first pressing position of the intermediate transfer roller for monochrome (34A) in full-color image forming so that an amount of pressing of the intermediate transfer belt (41) by the intermediate transfer roller for monochrome (34A) becomes greater in monochromatic image forming than in full-color image forming.
摘要:
An image forming apparatus includes a transfer belt unit which has an intermediate transfer belt for supporting toner images and primary transfer rollers for pressing the intermediate transfer belt against corresponding photoreceptor drums and moves the intermediate transfer belt along the surface of each photoreceptor drum to transfer the toner images to the intermediate transfer belt. The intermediate transfer belt is formed so as to be 30 μm to 50 μm in average thickness, each primary transfer roller is arranged at a position, along the moving direction of the intermediate transfer belt, which is deviated downstream with respect to the moving direction from the position where the intermediate transfer belt is in contact with the photoreceptor and which is projected toward the photoreceptor drum side so as to press the intermediate transfer belt against photoreceptor with a nip pressure ranging from 10 gf/cm2 to 40 gf/cm2.
摘要翻译:图像形成装置包括转印带单元,该转印带单元具有用于支撑调色剂图像的中间转印带和用于将中间转印带压靠在相应的感光鼓上的一次转印辊,并使中间转印带沿着每个感光鼓的表面移动以转印调色剂 图像到中间转印带。 中间转印带形成为平均厚度为30μm至50μm,每个一次转印辊布置在沿着中间转印带的移动方向的位置,该位置相对于移动方向从下游偏离 中间转印带与感光体接触并且朝向感光鼓侧突出的位置,以便以10gf / cm 2至40gf / cm 2的压区压力将中间转印带压靠感光体。
摘要:
An electrostatic charger according to the present invention includes a needle electrode, a support, and a cleaning member. The needle electrode has a linear array of needles. The support can move along the linear array. The cleaning member is supported by the support rotatably on an axis perpendicular to the linear array. While the support is moving with the cleaning member along the linear array, the cleaning member rotates, with the needles sinking in order into and subsequently coming in order out of the cleaning member. When the cleaning member makes each rotation while moving with the support, some of the needles sink in positions into the cleaning member where any other needles did not sink when the cleaning member made the previous rotation.
摘要:
A developer collecting apparatus includes a positioning frame for determining a mounting position of a photoreceptor onto a casing; a waste developer container in which waste developer eliminated by cleaning section is stored; and a container mounting section for mounting the waste developer container so as to be removable from the positioning frame and holding the waste developer container so as to be angularly displaceable with respect to the positioning frame. Further, the container mounting section includes a container holding member that is disposed so as to be angularly displaceable with respect to the positioning frame, for holding the waste developer container; a cam member disposed so as to be movable in a direction orthogonal to a direction in which the container holding member is angularly displaced; and an elastic member for biasing the cam member to the container holding member with an elastic force.
摘要:
A waste toner collecting container which is used in a color image forming apparatus and can be removed from the machine and stores waste toner particles which have not been transferred to recording paper and have been collected, is constructed such that an air sealing member is disposed at the coupling between the waste toner collecting container and a conveying member for conveying the collected waste toner into the waste toner collecting container to prevent the waste toner from seeping out at the coupling when the waste toner is conveyed and to seal the collecting port so that no waste toner will spill out from the waste toner collecting container which has been removed for replacement after the waste toner collected and conveyed therein has reached the predetermined amount.
摘要:
A transfer device is provided including an intermediate transfer belt and transfer rollers associated with respective of photosensitive drums. Each of the transfer rollers and the intermediate transfer belt define therebetween a contact range of which center lies downstream of the center of a contact range (transfer nip region) defined between the associated photosensitive drum and the endless belt in the direction of movement of the endless belt. The transfer roller deforms the path of movement of the intermediate transfer belt by contacting the intermediate transfer belt, and the resulting deformation causes the intermediate transfer belt to contact the periphery of the photosensitive drum over a predetermined range.
摘要:
In an image forming apparatus a primary transfer is carried out such that toner images on a plurality of photoreceptors are transferred and laminated onto an intermediate transfer member, and a recording paper and the intermediate transfer member are sandwiched between a secondary transfer roller disposed so as to be in contact with the intermediate transfer member and a secondary transfer counter roller disposed opposite to the secondary transfer roller, to carry out a secondary transfer that the toner images on the intermediate transfer member are transferred onto the recording paper. At the time, an electric field is applied to the recording paper, and further the secondary transfer counter roller is switched by a switch between grounded state and floating state so that a potential difference between the intermediate transfer member and the secondary transfer roller can be adjusted.
摘要:
A roller turning force generator is connected to a driving gear which is mounted on a shaft. The shaft is connected to offset roller assemblies disposed in an offset mechanism via connecting gears. The offset roller assemblies rotatably supported inside the offset mechanism are turned by a driving force transmitted from the roller turning force generator to discharge individual sheets of a printing medium in a sheet transport direction. The offset mechanism is linked to an offsetting force generator so that the offset mechanism can be shifted along a direction perpendicular to the sheet transport direction.