Abstract: A light-emitting diode and a manufacturing method thereof are provided. The manufacturing method includes following steps. First, an LED wafer is provided. The LED wafer includes a substrate and a light-emitting semiconductor stacking structure positioned on the surface of the substrate. The light-emitting semiconductor stacking structure includes a first type semiconductor layer, an active layer, and a second type semiconductor layer from a side of the substrate. Second, dicing lanes are defined on the upper surface of the LED wafer. Third, dicing is performed along the dicing lanes of the substrate using a laser. The laser is focused on the lower surface of the substrate to form a surface hole and focused inside the substrate to form an internal hole. The diameter of the surface hole is greater than the diameter of the internal hole. Fourth, the LED wafer is separated into LED chips along the dicing lanes.

Abstract: A rotary seat including a base includes an outer surface, and a composite material layer attached to at least a part of the outer surface. The base also includes a recess for accommodating a turntable and including a first opening on the outer surface. The material of the composite material layer includes fibers and a resin. Therefore, the rotary seat may be more lightweight. A rotary table is also provided and includes the rotary seat, a driving device which drives the rotary seat to rotate, and a turntable which is rotatably disposed in the recess of the base.

Abstract: A pin-jointed structure connected between a cover member and a base member of a mobile electronic device is disclosed to include a pivot holder affixed to the base member, a mounting plate affixed to the cover member and pivoted to the pivot holder, and a spring plate connected between the mounting plate and a boss of the cover member for buffering the drawing force between the pivot holder and the mounting plate to prevent breaking of the boss of the cover member when the cover member is opening from or closing on the base member.

Abstract: An engaging and ejecting device for expansion module/cell of portable computer, including a control member and a switch member pivotally disposed on one side of a housing of the portable computer. The control member and the switch member drivingly cooperate with each other. One side of the expansion module is disposed with a block body. After the module is inserted into the portable computer housing, the control member, switch member and control block drivingly cooperate with each other to engage the module inside the computer housing. When the switch member is pushed outward, the module is ejected out of the computer housing.

Abstract: An insertion cartridge for hard disc of a portable computer. The cartridge includes an upper cover and a lower cover mated with each other. Two sides of each of the upper and lower covers are formed with at least one fixing plate. When the upper cover is assembled with the lower cover, the fixing plates are firmly overlapped on each other. After the hard disc is enclosed in the insertion cartridge, the insertion cartridge with the hard disc is fitted into the portable computer and electrically connected with the hard disc connector of the portable computer. Then, the insertion cartridge with the hard disc is locked with the internal component of the portable computer. In addition, multiple resilient plates are disposed on two lateral sides of the lower cover. When the upper and lower covers are assembled, the resilient plates contact with the inner wall of the upper cover to serve as contact points.