Abstract: A server includes a chassis, an air duct, a sensing module and a board management controller. The air duct is disposed in the chassis. The sensing module is disposed in the chassis. The sensing module senses whether the air duct is correctly installed. The board management controller is disposed in the chassis and coupled to the sensing module. When the air duct is not correctly installed, the sensing module notifies the board management controller to generate a warning message.

Abstract: The present invention provides a wafer notch leveling device, which comprises a body, a first rotating portion, a positioning portion, a power portion, and a control unit. The body has a support portion and a pivot portion is provided at each terminal of the body, the pivot portion pivotally connects a plurality of supporting arms. The first rotating portion and the positioning portion are electrically connected with the power portion. The power portion is electrically connected with the control unit. Especially, when a plurality of wafers are placed on the support portion and fixed, the first rotating portion is electrically connected with the power portion through the control unit to drive the plurality of wafers to rotate the wafers, a notch on the wafer is leveled through the positioning portion.

Abstract: A planetary reducer contains: a sun gear rod, a gear assembly, a first external gear, and a second external gear. The sun gear rod includes an extension and a toothed section. The gear assembly includes a post, a first planetary gear, and a second planetary gear. Some of multiple teeth of the first planetary gear and some of multiple teeth of the second planetary gear expose outside the post. A number of the multiple teeth of the first planetary gear is different from a number of the multiple teeth of the second planetary gear. The first external gear includes a first surrounding portion and a first toothed portion which meshes with the first planetary gear. The second external gear includes a second surrounding portion and a second toothed portion which meshes with the second planetary gear.

Abstract: The present invention discloses a structure of an emitter electrode for enhancing ion currents, including a tip end part and a shank part. The tip end part has a pinpoint, a first diameter, and a radius of curvature. A length of the tip end part with the shank part is from the pinpoint to a first position of the shank part and a distance between the first position and the pinpoint is 300 times the first diameter. The radius of curvature of the tip end part ranges from 50 nanometers to 5 micrometers. The first diameter is 2 times the radius of curvature.

Abstract: The present invention discloses a structure of an emitter electrode for enhancing ion currents, including a tip end part and a shank part. The tip end part has a pinpoint, a first diameter, and a radius of curvature. A length of the tip end part with the shank part is from the pinpoint to a first position of the shank part and a distance between the first position and the pinpoint is 300 times the first diameter. The radius of curvature of the tip end part ranges from 50 nanometers to 5 micrometers. The first diameter is 2 times the radius of curvature.

Abstract: The present invention provides a wafer notch leveling device, which comprises a body, a first rotating portion, a positioning portion, a power portion, and a control unit. The body has a support portion and a pivot portion is provided at each terminal of the body, the pivot portion pivotally connects a plurality of supporting arms. The first rotating portion and the positioning portion are electrically connected with the power portion. The power portion is electrically connected with the control unit. Especially, when a plurality of wafers are placed on the support portion and fixed, the first rotating portion is electrically connected with the power portion through the control unit to drive the plurality of wafers to rotate the wafers, a notch on the wafer is leveled through the positioning portion.