Abstract: A micro light-emitting element is provided. The micro light-emitting element includes a first-type semiconductor having a bottom surface and a light-emitting layer disposed on the first-type semiconductor. The micro light-emitting element also includes a second-type semiconductor disposed on the light-emitting layer and an intrinsic semiconductor disposed on the second-type semiconductor and made of the same material as the second-type semiconductor. The intrinsic semiconductor has a top surface relative to the bottom surface. The sidewalls of the first-type semiconductor, the light-emitting layer, the second-type semiconductor, and the intrinsic semiconductor form a continuous side surface, and the side surface connects the bottom surface to the top surface.

Abstract: A pressing machine for joining two workpieces includes a workbench (10), a rigging (30) providing periodical vertical movement, a pair of pressing devices (42) for impacting the workpieces, and a push apparatus (70). A wedge block (40) is secured under the rigging. The wedge block has two first slopes (48). The push apparatus includes a push block (70) with a second slope. A stop screw (26) is secured in the workbench. When the rigging is moved downwardly, the pressing devices impact the workpieces and the first slopes abut against the second slope. The push block is moved toward the workpieces, thereby pushing one workpiece to move relative to the other one. When the wedge block abuts the stop screw, the push block stops pushing the workpiece. The moving workpiece is completely engaged with hooks formed in the stationary workpiece at corresponding openings defined in the moving workpiece.

Abstract: A pressing machine for joining two workpieces includes a workbench (10), a rigging (30) providing periodical vertical movement, a pair of pressing devices (42) for impacting the workpieces, and a push apparatus (70). A wedge block (40) is secured under the rigging. The wedge block has two first slopes (48). The push apparatus includes a push block (70) with a second slope. A stop screw (26) is secured in the workbench. When the rigging is moved downwardly, the pressing devices impact the workpieces and the first slopes abut against the second slope. The push block is moved toward the workpieces, thereby pushing one workpiece to move relative to the other one. When the wedge block abuts the stop screw, the push block stops pushing the workpiece. The moving workpiece is completely engaged with hooks formed in the stationary workpiece at corresponding openings defined in the moving workpiece.