摘要:
A recess is formed in a land (2) of an LED reflecting plate (1) formed of a metal plate. The recess comprises a flat LED chip mounting portion (7) and a reflecting portion (8) inclined with respect to the LED chip mounting portion (7). The LED reflecting plate (1) is mounted on a printed wiring board (25) such that the land (2) is fitted in a first through hole (18). An LED chip (27) mounted on the LED chip mounting portion (7) is connected to a terminal portion (22) formed on the printed wiring board (25). The printed wiring board (25) is diced along a third through hole (19) to form an LED device (30) as one unit. With this arrangement, heat radiation properties and reflecting efficiency of the LED device (30) can be improved, and the manufacturing cost can be decreased.
摘要:
A plate-like material is pressed and a middle concave portion centered on a center axis is formed in one axial surface of the material. Likely, an annular concave portion centered on a center axis and radially outwardly arranged is formed in one and/or the other axial surface of the material. The material is then cut along a radially outer rim of the middle concave portion, and between a radially outer rim and a radially inner rim of the annular concave portion. In this way, a thrust plate having indented portions at radially inside and outside portion of the one and/or the other axial surface thereof is manufactured. A burr formed in press working is accommodate within the indented portion and does not axially protrude from the one and/or the other axial surface of the thrust plate.
摘要:
A rotor hub includes a shaft connecting portion arranged to be connected to a shaft serving as a central axis, a disk loading portion centered about the central axis and arranged to support a disk shaped storage medium mounted thereon, a yoke arranged below the disk loading portion and supporting a field magnet at one of an inner side surface thereof and an outer side surface thereof, and a flexible portion connecting the disk loading portion to the yoke and being flexible with respect to a force applied thereto from the yoke.
摘要:
An electronic device is provided which includes a substrate of insulating resin having at least a pair of interior terminal portions on an upper surface thereof, an electronic element mounted on the terminal portions, having at least a pair of electrode terminals thereof, and a member of insulating resin, bonded on the upper surface of said substrate. The frame includes a cavity to store the electronic element. A cover member of insulating material hermetically seals over the cavity. Electrodes are formed at or in vicinity of positions of the terminals of said electronic element to electrically conduct the interior terminal portions for connection outside the device. Alternatively, roughened surfaces can be formed on metal electrode portions, which are formed on the upper surface of substrate for electrically conducting said interior terminal portions to exterior terminal portions.
摘要:
A rotor hub includes a shaft connecting portion arranged to be connected to a shaft serving as a central axis, a disk loading portion centered about the central axis and arranged to support a disk shaped storage medium mounted thereon, a yoke arranged below the disk loading portion and supporting a field magnet at one of an inner side surface thereof and an outer side surface thereof, and a flexible portion connecting the disk loading portion to the yoke and being flexible with respect to a force applied thereto from the yoke.
摘要:
For providing a chip-type light emitting device, having a plural number of light emitting elements therein, so as to enable to obtain a high optical output with preferable conversion efficiency thereof, and a wiring substrate for that, the chip-type light emitting device, mounting the plural number of the light emitting diodes 30, 30 . . . within an inside of an insulating substrate, has a base substrate 10 and a reflector substrate 20, which is laminated and adhered on an upper surface thereof. In the base substrate 10 is formed a though hole 11, on the reverse surface of which is formed a heat radiating plate 12 made from a thick metal thin film. Also, on an inner periphery and a bottom portion of the through hole are formed a reflection film 13, and further wiring patterns 14, 14 . . . are formed on the substrate. On the other hand, the reflector substrate 20 is formed with a through hole 21, having a diameter larger than that of the through hole of the base substrate, and on an inner peripheral surface thereof is formed a reflection film 22. This reflector substrate is disposed and adhered on an upper surface of the base substrate, at such the position that portions of the wiring patterns are exposed through the through hole thereof, and the plural number of the light emitting diodes are connected to the wiring patterns on the base substrate, to be mounted thereon.
摘要:
A recess is formed in a land (2) of an LED reflecting plate (1) formed of a metal plate. The recess comprises a flat LED chip mounting portion (7) and a reflecting portion (8) inclined with respect to the LED chip mounting portion (7). The LED reflecting plate (1) is mounted on a printed wiring board (25) such that the land (2) is fitted in a first through hole (18). An LED chip (27) mounted on the LED chip mounting portion (7) is connected to a terminal portion (22) formed on the printed wiring board (25). The printed wiring board (25) is diced along a third through hole (19) to form an LED device (30) as one unit. With this arrangement, heat radiation properties and reflecting efficiency of the LED device (30) can be improved, and the manufacturing cost can be decreased.
摘要:
A rotor hub includes a shaft connecting portion arranged to be connected to a shaft serving as a central axis, a disk loading portion centered about the central axis and arranged to support a disk shaped storage medium mounted thereon, a yoke arranged below the disk loading portion and supporting a field magnet at one of an inner side surface thereof and an outer side surface thereof, and a flexible portion connecting the disk loading portion to the yoke and being flexible with respect to a force applied thereto from the yoke.
摘要:
A plate-like material is pressed and a middle concave portion centered on a center axis is formed in one axial surface of the material. Likely, an annular concave portion centered on a center axis and radially outwardly arranged is formed in one and/or the other axial surface of the material. The material is then cut along a radially outer rim of the middle concave portion, and between a radially outer rim and a radially inner rim of the annular concave portion. In this way, a thrust plate having indented portions at radially inside and outside portion of the one and/or the other axial surface thereof is manufactured. A burr formed in press working is accommodate within the indented portion and does not axially protrude from the one and/or the other axial surface of the thrust plate.
摘要:
A recess is formed in a land (2) of an LED reflecting plate (1) formed of a metal plate. The recess comprises a flat LED chip mounting portion (7) and a reflecting portion (8) inclined with respect to the LED chip mounting portion (7). The LED reflecting plate (1) is mounted on a printed wiring board (25) such that the land (2) is fitted in a first through hole (18). An LED chip (27) mounted on the LED chip mounting portion (7) is connected to a terminal portion (22) formed on the printed wiring board (25). The printed wiring board (25) is diced along a third through hole (19) to form an LED device (30) as one unit. With this arrangement, heat radiation properties and reflecting efficiency of the LED device (30) can be improved, and the manufacturing cost can be decreased.