Abstract: A light detector according to one embodiment, includes a substrate. The substrate includes a first semiconductor layer, an insulating layer, and a second semiconductor layer. The insulating layer is located on the first semiconductor layer. The second semiconductor layer is located on the insulating layer. The second semiconductor layer includes a photoelectric conversion part. The photoelectric conversion part includes a first semiconductor region and a second semiconductor region. The substrate includes a void and a trench. The void is positioned below the photoelectric conversion part and between the first semiconductor layer and the second semiconductor layer. The trench surrounds the photoelectric conversion part. A lower end of the trench is positioned in the second semiconductor layer. The photoelectric conversion part is electrically connected with an upper surface side of the substrate via a portion below the trench.

Abstract: An electronic component includes an element body made of a composite material of a resin material and metal powder. A plurality of particles of the metal powder are exposed from the resin material and make contact with one another on the outer surface of the element.

Abstract: A light detector includes a semiconductor layer and a light-receiving element. The semiconductor layer is of a first conductivity type. The light-receiving element includes a first semiconductor region, a second semiconductor region, a third semiconductor region, and a fourth semiconductor region. The first semiconductor region is of a second conductivity type. The second semiconductor region is located between the first semiconductor region and the semiconductor layer. The second semiconductor region is of the first conductivity type and contacts the first semiconductor region. The third semiconductor region is located between the second semiconductor region and the semiconductor layer. The third semiconductor region is of the second conductivity type. The fourth semiconductor region is located between the third semiconductor region and the semiconductor layer.

Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

Abstract: An image forming apparatus includes: a housing; drum cartridge attachable to the housing; a toner cartridge attachable to the drum cartridge at an attachment position; and a contacting portion positioned at a side wall of the housing positioned at one end thereof in a first direction. The drum cartridge includes a photosensitive drum and a drum frame. The toner cartridge includes a toner casing, a toner memory, a memory holder holding the toner memory, and a memory holder cover movably holding the memory holder. The memory holder cover has a protrusion protruding in a direction crossing the first direction. In a case where the drum cartridge is to be attached to the housing while the toner cartridge is lifted up from the drum frame than the attachment position, the protrusion is configured to contact the contacting portion to move the toner cartridge to the attachment position from the lifted-up position.

Abstract: An image forming apparatus includes: a main casing; a photosensitive drum rotatable about an axis extending in a first direction; a developing cartridge; a transfer unit; a solvent cartridge accommodating solvent for dissolving toner; an applicator applying the solvent to the toner on a sheet; and a cover movable between an open position and a closed position. The developing cartridge and the solvent cartridge are detachably attachable to the main casing independently of each other. The developing cartridge and the solvent cartridge are positioned between the applicator and the cover in a second direction crossing the first direction, and the solvent cartridge is positioned closer to the applicator than the developing cartridge is to the applicator in a state where the developing cartridge and the solvent cartridge are attached to the main casing and the cover is at the closed position.

Abstract: A developing cartridge includes a housing, a storage medium having an electrical contact surface, a holder holding the electrical contact surface and movable with respect to the housing between a first position and a second position, and a roller including a first roller protrusion. The first roller protrusion is movable between a third position and a fourth position in accordance with rotation of the roller. The holder is movable in accordance with movement of the first roller protrusion. As the first roller protrusion moves from the third position to the fourth position, the holder moves from the first position to the second position.

Abstract: A toner cartridge includes a toner housing, a toner conveyor unit, a first cover, a shutter, a toner memory, and a memory holder. The first cover covers a toner housing opening and is movable together with the toner housing. The shutter includes a protrusion. The memory holder holds the toner memory and is movable relative to the toner housing. When the toner cartridge is attached, the protrusion is located in place, and the toner housing is movable between a close position in which the shutter closes a cover opening of the first cover and an open position in which at least part of a shutter opening of the shutter is aligned with at least part of the cover opening to allow toner to be let out through the cover opening. The position of the memory holder is different from the position of the shutter in a first direction.

Abstract: A developing cartridge includes: a casing; a developing roller rotatable about a developing axis extending in a first direction and positioned at one end portion of the casing in a second direction crossing the first direction; a developing electrode electrically connected to the developing roller and positioned at one end portion of the casing in the first direction; a supply roller rotatable about a supply axis extending in the first direction and configured to supply toner to the developing roller; a supply electrode electrically connected to the supply roller and positioned at one end portion of the casing in the first direction; and an IC chip having an electrical contact surface positioned at one end portion of the casing in the first direction. The electrical contact surface is positioned opposite the developing electrode in the second direction with respect to a part of the supply electrode.

Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

Abstract: An image forming apparatus includes a drum cartridge and developing cartridge. The drum cartridge may include a photosensitive drum rotatable about a first axis extending in an axial direction. The developing cartridge may include a developing roller rotatable about a second axis extending in the axial direction. The image forming apparatus may include a main casing including a slot extending in the axial direction. The image forming apparatus may include a first inner surface positioned inside of the slot, and a second inner surface positioned inside of the slot farther from the cover in the axial direction than the first inner surface from the cover in the axial direction. The first and second inner surfaces may be configured to press the developing roller toward the photosensitive drum.

Abstract: Toner cartridge includes a housing, an agitator, an auger, a first protrusion, and a second protrusion. The housing includes a first toner accommodating portion having and a second toner accommodating portion. The auger is rotatable about a second axis extending in a first direction and is configured to convey toner from a first toner accommodating portion to the second toner accommodating portion. The first protrusion is positioned at a first side of the second toner accommodating portion. The first protrusion extends in the first direction. The second protrusion is positioned at a second side of the second toner accommodating portion and extends in the first direction.

Abstract: A developing cartridge includes: a developing roller; a coupling for rotating the developing roller; a shaft; and a clutch. The developing roller is rotatable about a first axis extending in an axial direction. The coupling is rotatable about a second axis extending in the axial direction. The shaft rotatably supports the coupling. The clutch is rotatable together with the coupling about the shaft in a case where the coupling rotates in a first rotational direction. In a case where the coupling rotates in a second rotational direction opposite to the first rotational direction, the clutch engages with a portion of the shaft and the clutch and the coupling do not rotate.

Abstract: An image forming apparatus includes a drum cartridge and developing cartridge. The drum cartridge may include a photosensitive drum rotatable about a first axis extending in an axial direction. The developing cartridge may include a developing roller rotatable about a second axis extending in the axial direction. The image forming apparatus may include a main casing including a slot extending in the axial direction. The image forming apparatus may include a first inner surface positioned inside of the slot, and a second inner surface positioned inside of the slot farther from the cover in the axial direction than the first inner surface from the cover in the axial direction. The first and second inner surfaces may be configured to press the developing roller toward the photosensitive drum.

Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

Abstract: An image forming apparatus includes: a housing; drum cartridge attachable to the housing; a toner cartridge attachable to the drum cartridge at an attachment position; and a contacting portion positioned at a side wall of the housing positioned at one end thereof in a first direction. The drum cartridge includes a photosensitive drum and a drum frame. The toner cartridge includes a toner casing, a toner memory, a memory holder holding the toner memory, and a memory holder cover movably holding the memory holder. The memory holder cover has a protrusion protruding in a direction crossing the first direction. In a case where the drum cartridge is to be attached to the housing while the toner cartridge is lifted up from the drum frame than the attachment position, the protrusion is configured to contact the contacting portion to move the toner cartridge to the attachment position from the lifted-up position.

Abstract: A toner cartridge includes: a toner casing configured to accommodate toner therein; a toner memory; a memory holder holding the toner memory; a memory holder cover; a gear positioned at an outer surface of the toner casing; and a gear cover. The memory holder cover movably holds the memory holder. The memory holder cover has a pawl. The gear cover is positioned at one end portion of the toner casing at one side in a first direction. The gear cover covers at least a part of the gear and has a hook in which the pawl is inserted.

Abstract: A developer cartridge may include: a first gear having a small-diameter gear portion and a large-diameter gear portion; and a second gear including: a first columnar portion centered on a second axis; a second columnar portion having a smaller diameter than the first columnar portion; a first engagement portion extending along a portion of a peripheral surface of the first columnar portion and engageable with the small-diameter gear portion; a second engagement portion extending along a portion of a peripheral surface of the second columnar portion and positioned closer to a housing than the first engagement portion in an axial direction and engageable with the large-diameter gear portion; and a protruding portion protruding in the axial direction and rotatable together with the first engagement portion and the second engagement portion. The second engagement portion may engage the large-diameter gear portion after the first engagement portion engages the small-diameter gear portion.

Abstract: An image forming apparatus includes a main housing, a drawer, and a cartridge. The drawer is movable between an inside position inside the main housing and an outside position outside the main housing. The cartridge is installable into and removable from the drawer. The cartridge includes a photosensitive drum configured to rotate about a drum axis. The drawer comprises a lock member movable between a lock position in which the drawer is locked to the main housing, and an unlock position in which the drawer is unlocked from the main housing. The cartridge installed in the drawer is rotatable about the drum axis between a first position and a second position. The lock member is positioned in the lock position when the cartridge is positioned in the first position, and positioned in the unlock position when the cartridge is positioned in the second position.

Abstract: Toner cartridge includes a housing, an agitator, an auger, a first protrusion, and a second protrusion. The housing includes a first toner accommodating portion having and a second toner accommodating portion. The auger is rotatable about a second axis extending in a first direction and is configured to convey toner from a first toner accommodating portion to the second toner accommodating portion. The first protrusion is positioned at a first side of the second toner accommodating portion. The first protrusion extends in the first direction. The second protrusion is positioned at a second side of the second toner accommodating portion and extends in the first direction.