Abstract: A method includes forming a pad layer. The pad layer includes a first portion over a first part of a semiconductor substrate, and a second portion over a second part of the semiconductor substrate. The first portion has a first thickness, and the second portion has a second thickness smaller than the first thickness. The semiconductor substrate is then annealed to form a first oxide layer over the first part of the semiconductor substrate, and a second oxide layer over the second part of the semiconductor substrate. The pad layer, the first oxide layer, and the second oxide layer are removed. A semiconductor layer is epitaxially grown over and contacting the first part and the second part of the semiconductor substrate.

Abstract: A robot teaching device is suitable for being signal connected to a controller used to control a robot, and includes: a connecting base which includes an enable switch and a first connector, and is connected to the controller by a transmission wire; a motion device which is removably disposed in the connecting base, and includes a second connector connected to the first connector, and a touch screen for displaying plural virtual keys. The motion device will be wirelessly signal connected to the controller, when it is removed from the connecting base, and the touch screen will display the virtual keys. When the motion device is inserted in the connecting base, and the enable switch is not pressed, the first and second connectors will be connected, and the virtual keys will be switched off. The virtual keys will be switched on after the enable switch is kept being pressed.

Abstract: A robot teaching device is suitable for being signal connected to a controller used to control a robot, and includes: a connecting base which includes an enable switch and a first connector, and is connected to the controller by a transmission wire; a motion device which is removably disposed in the connecting base, and includes a second connector connected to the first connector, and a touch screen for displaying plural virtual keys. The motion device will be wirelessly signal connected to the controller, when it is removed from the connecting base, and the touch screen will display the virtual keys. When the motion device is inserted in the connecting base, and the enable switch is not pressed, the first and second connectors will be connected, and the virtual keys will be switched off. The virtual keys will be switched on after the enable switch is kept being pressed.

Abstract: A gait rehabilitation machine and a method of using the same for lower-limb rehabilitation. The gait rehabilitation machine includes: a frame; a rear supporting member provided at the frame so that the back side of a human body can lean against the rear supporting member; a thigh supporting member corresponding to a thigh of the human body and pivotally connected to the frame; a shank supporting member corresponding to the corresponding shank of the human body, pivotally connected to the thigh supporting member, and having a pedal to be stepped on by the human body; a knee supporting member corresponding to the corresponding knee of the human body and provided at the thigh supporting member or the shank supporting member; and a transmission device for driving the shank supporting member to move. Thus, a patient can do lower-limb gait rehabilitation exercise without using a suspension system.

Abstract: A motion guide device includes a rolling passage formed between two members, a number of cylindrical roller bearing members disposed in the rolling passage and engaged between the members, and a number of spacers disposed in the rolling passage and engaged between the cylindrical roller bearing members, the spacers each include two opposite curved depressions for engaging with the cylindrical outer peripheral surfaces of the cylindrical roller bearing members, and each defined by a planar middle surface, a tilted upper surface and a tilted lower surface inclined relative to the planar middle surface and the vertical axis (Z) of the spacer for selectively engaging with the cylindrical roller bearing members.

Abstract: A ball screw with sectional circulating assemblies comprises an inner circulating block and an outer circulating block. In assembly, the inner circulating block is initially placed between the screw shaft and the nut before the rolling balls and the screw shaft are positioned, thus preventing the rolling balls from dropping out and the interference with the threads of the screw shaft. After the rolling balls and the screw shaft are positioned, the outer circulating block is placed into the nut and engaged with the inner circulating block, and the outer circulating block is fixed to the nut. This method can maintain the tightness of the nut, thus preventing the leakage of noise.

Abstract: A directional position control method uses an instructor device and a controller to control motion of a robot, and a directional-control starter is used to actuate a directional control function. The directional-control starter controls the controller to drive the robot to move according to the instructor direction reference by converting the coordinate of the robot into the coordinate of the instructor. The directional position control method allows the movement direction reference of the robot to be defined manually or automatically, so that the robot can be moved based on the instructor direction reference of the instructor, allowing the operator to operate the robot by intuition without too much discretion, consequently reducing difficulty and error in operating the robot. Besides, the operator can control the robot by staying at the location where the instructor is located, without standing close to the robot, therefore, improving safety of operating the robot.

Abstract: A motion guide device includes a rolling passage formed between two members, a number of cylindrical roller bearing members disposed in the rolling passage and engaged between the members, and a number of spacers disposed in the rolling passage and engaged between the cylindrical roller bearing members, the spacers each include two opposite curved depressions for engaging with the cylindrical outer peripheral surfaces of the cylindrical roller bearing members, and each defined by a planar middle surface, a tilted upper surface and a tilted lower surface inclined relative to the planar middle surface and the vertical axis (Z) of the spacer for selectively engaging with the cylindrical roller bearing members.

Abstract: A ball screw with sectional circulating assemblies comprises an inner circulating block and an outer circulating block. In assembly, the inner circulating block is initially placed between the screw shaft and the nut before the rolling balls and the screw shaft are positioned, thus preventing the rolling balls from dropping out and the interference with the threads of the screw shaft. After the rolling balls and the screw shaft are positioned, the outer circulating block is placed into the nut and engaged with the inner circulating block, and the outer circulating block is fixed to the nut. This method can maintain the tightness of the nut, thus preventing the leakage of noise.

Abstract: A roller screw includes a long shaft, a screw nut sleeved onto the long shaft, and rollers, a turnaround member and a turnover member set in between the long shaft and the screw nut. The turnaround member enables the rollers to circulate. The turnover member defines a turnover passage extending over the peripheral surface of the long shaft and connected between two load paths in the long shaft and the screw nut to constitute a circulation path. The direction of arrangement of the rollers before entering the turnover passage is different from that after moving out of the turnover passage so that the amount ratio of the rollers that are arranged in two different directions is kept constant for industrial application.

Abstract: A roller screw structure comprises a nut, a screw and a rolling assembly. The rolling assembly is movably disposed between the nut and the screw and includes at least one rolling cone. The slantwise rolling surface of the rolling cone contacts the spiral groove surfaces of the nut and the screw in a line-to-line manner, and the angle between the rolling surface and the self-rotation axis of the rolling cone is from 0 degree to 6.3 degrees. Thereby, making the distance between the self-rotation axis and the rolling surface of the rolling cone of the rolling assembly different can prevent the occurrence of speed difference caused at different rolling paths of the rolling assembly.

Abstract: A gait rehabilitation machine and a method of using the same are provided for lower-limb rehabilitation. The gait rehabilitation machine includes: a frame; a rear supporting member provided at the frame so that the back side of a human body can lean against the rear supporting member; a thigh supporting member corresponding to a thigh of the human body and pivotally connected to the frame; a shank supporting member corresponding to the corresponding shank of the human body, pivotally connected to the thigh supporting member, and having a petal to be stepped on by the human body; a knee supporting member corresponding to the corresponding knee of the human body and provided at the thigh supporting member or the shank supporting member; and a transmission device for driving the shank supporting member to move. Thus, a patient can do lower-limb gait rehabilitation exercise without using a suspension system.

Abstract: A nut rotary ball screw with a predetermined pressure structure is disclosed. In the nut rotary ball screw of the present invention, we may rotate the predetermined pressure adjusting device to adjust the magnitude of the predetermined pressure by generating a predetermined pressure between the first inner slot and the outer slot as well as the first rolling pieces and between the second inner slot and the outer slot as well as the first rolling pieces. The present invention can greatly simplify the complicated adjustment process of the predetermined pressure in the prior art and can eliminate the time-consuming grinding step and the steps to disassemble or assemble a bolt. Accordingly, the present may simplify the adjustment process of the predetermined pressure and may lower the production cost.

Abstract: A roller screw includes a long shaft, a screw nut sleeved onto the long shaft, and rollers, a turnaround member and a turnover member set in between the long shaft and the screw nut. The turnaround member enables the rollers to circulate. The turnover member defines a turnover passage extending over the peripheral surface of the long shaft and connected between two load paths in the long shaft and the screw nut to constitute a circulation path. The direction of arrangement of the rollers before entering the turnover passage is different from that after moving out of the turnover passage so that the amount ratio of the rollers that are arranged in two different directions is kept constant for industrial application.

Abstract: A ball screw device includes an elongated screw shaft and a ball nut having helical grooves for receiving ball bearing members, a housing is attached to the ball nut and includes a bore for receiving the screw shaft, and includes one or more slots communicative with the bore of the housing, and one or more wiper members are changeably engaged into the slots of the housing and include a wiper element engaged into the bore of the housing for engaging into the groove of the screw shaft and for removing or wiping off the dirt from the helical groove of the screw shaft and for preventing the ball nut and the screw shaft from being damaged by the dirt.

Abstract: A sectional circulating assembly for a ball screw comprises an inner circulating block and an outer circulating block. In assembly, the inner circulating block is initially placed between the screw shaft and the nut before the rolling balls and the screw shaft are positioned, thus preventing the rolling balls from dropping out and the interference with the threads. After the rolling balls and the screw shaft are positioned, the outer circulating block is placed into the nut and to be engaged with the inner circulating block, and the outer circulating block is fixed to the nut. This method can maintain the tightness of the nut, thus preventing the leakage of noise.

Abstract: A screw-driven fan device includes a screw, a screw nut, a fan, and a connecting unit. An external edge of the screw has a rolling groove formed thereon and a groove formed alternately with the rolling groove. The screw nut, disposed on the screw, has a linking portion. The fan has a rotary axle with a hole formed thereon for screw passing through. The fan further has blades surrounding the rotary axle. The hole has a flange formed on an interior side thereof and engaged with the groove. The connecting unit has a space therein such that the fan can be placed in the space.

Abstract: A roller screw having plural circulating devices cooperating with plural helical grooves comprises a screw, a nut, plural rollers and circulating devices. The screw is provided in a surface with at least two helical grooves. The nut is provided with helical grooves opposite to the screw and receiving holes in a peripheral wall thereof, and each receiving hole is provided with a fixing groove at each of two ends thereof. The rollers are arranged in the helical grooves of the screw and the nut. The circulating devices have the same number of the helical grooves of the screw, and each circulating device includes an opening at each of two ends thereof and a passage between the two openings.

Abstract: A ball screw device includes an elongated screw shaft and a ball nut having helical grooves for receiving ball bearing members, a housing is attached to the ball nut and includes a bore for receiving the screw shaft, and includes one or more slots communicative with the bore of the housing, and one or more wiper members are changeably engaged into the slots of the housing and include a wiper element engaged into the bore of the housing for engaging into the groove of the screw shaft and for removing or wiping off the dirt from the helical groove of the screw shaft and for preventing the ball nut and the screw shaft from being damaged by the dirt.

Abstract: A roller screw structure comprises a nut, a screw and a rolling assembly. The rolling assembly is movably disposed between the nut and the screw and includes at least one rolling cone. The slantwise rolling surface of the rolling cone contacts the spiral groove surfaces of the nut and the screw in a line-to-line manner, and the angle between the rolling surface and the self-rotation axis of the rolling cone is from 0 degree to 6.3 degrees. Thereby, making the distance between the self-rotation axis and the rolling surface of the rolling cone of the rolling assembly different can prevent the occurrence of speed difference caused at different rolling paths of the rolling assembly.