Abstract: A projection device, includes a housing including an opening, a projection lens disposed in the housing, a lens cover module including a lens cover, and a Hall switch including a Hall sensor and a magnet. The lens cover shields the opening when the lens cover is in the closed position, and the housing exposes the opening and exposes the projection lens when the lens cover is in the open position. The Hall sensor is disposed on one of the housing and the lens cover, and the magnet is disposed on the other one of the lens cover and the housing corresponding to the Hall sensor. The Hall switch generates a first control signal when the lens cover is moved from the closed position to the open position. The Hall switch generates a second control signal when the lens cover is moved from the open position to the closed position.

Abstract: A continuous process for preparing a polyester shrinkable film includes: pumping an amorphous PET-based polyester melt having a melt viscosity ?1 directly from a polymerization reactor into a first cooling zone; cooling the polyester melt to increase the melt viscosity thereof to a melt viscosity ?2 such that a difference between ?2 and ?1 ranges from 1500 poise to 3500 poise; feeding the polyester melt into a second cooling zone; cooling the polyester melt to increase the melt viscosity thereof to a melt viscosity ?3 ranging from 5000 poise to 12000 poise such that a difference between ?3 and ?2 ranges from 1000 poise to 5500 poise; and pumping the polyester melt from the second cooling zone into a zone for film-forming treatment.

Abstract: A system and machine-implemented method of wireless network access are provided. First network credentials for a first wireless network hosted by a wireless-enabled device are received from a server. A first network connection with the wireless-enabled device in the first wireless network is established based on the first network credentials. Second network credentials for a second wireless network are provided to the wireless-enabled device via the first network connection. A second network connection with the wireless-enabled device in the second wireless network is established based on the second network credentials.

Abstract: A ball screw includes a screw having a primary spiral groove. A first nut unit includes a first nut and first balls. The first nut has a first spiral groove. The first balls are located in the first spiral groove and contact the inner surface of the first spiral groove by a first contact angle. A second nut unit includes a second nut and second balls. The second nut has a second spiral groove. The second balls are located in the second spiral groove and contact the inner surface of the second spiral groove by a second contact angle which is different from the first contact angle. When a first wearing trace is formed along the screw by the first balls, the first nut unit is replaced with the second nut unit. A second wearing trace is formed along the screw and not overlapped with the first wearing trace.

Abstract: A semiconductor device includes a semiconductor substrate having a gate trench including of an upper trench and a lower trench. The upper trench is wider than the lower trench. A gate is embedded in the gate trench. The gate includes an upper portion and a lower portion. A first gate dielectric layer is between the upper portion and a sidewall of the upper trench. The first gate dielectric layer has a first thickness. A second gate dielectric layer is between the lower portion and a sidewall of the lower trench and between the lower portion and a bottom surface of the lower trench. The second gate dielectric layer has a second thickness that is smaller than the first thickness.

Abstract: A method for manufacturing a negative electrode material of a lithium battery is provided. The method includes: covering a metal material and a carbon material on a surface of a silicon material; performing a thermal process for reacting the metal material with the carbon material on the surface of the silicon material thereby forming a silicon composite material and at least one projection on the surface of the silicon material, wherein a free end of the projection is extended to form a head, the silicon composite material is used as the negative electrode material of the lithium battery, the silicon composite material comprises a composite layer forming on the surface of the silicon material, and the composite layer comprises a metal silicide, a metal oxide, a silicon carbide and a silicon oxide.

Abstract: A system and machine-implemented method of wireless network access are provided. First network credentials for a first wireless network hosted by a wireless-enabled device are received from a server. A first network connection with the wireless-enabled device in the first wireless network is established based on the first network credentials. Second network credentials for a second wireless network are provided to the wireless-enabled device via the first network connection. A second network connection with the wireless-enabled device in the second wireless network is established based on the second network credentials.

Abstract: A semiconductor device includes a semiconductor substrate having a gate trench including an upper trench and a lower trench. The upper trench is wider than the lower trench. A gate is embedded in the gate trench. The gate includes an upper portion and a lower portion. A first gate dielectric layer is between the upper portion and a sidewall of the upper trench. The first gate dielectric layer has a first thickness. A second gate dielectric layer is between the lower portion and a sidewall of the lower trench and between the lower portion and a bottom surface of the lower trench. The second gate dielectric layer has a second thickness that is smaller than the first thickness.

Abstract: A cleaning grinding head structure includes a main body, a connecting member connected with the main body, a stop ring mounted between the main body and the connecting member, and an operation member mounted on the connecting member. The main body has a first end provided with a fitting section and a second end provided with a connecting section. The main body has a mounting section arranged on the connecting section. The mounting section is provided with a plurality of slots. The connecting member has a first end provided with a locking section and a second end provided with a driving section. The locking section is provided with a mounting recess mounted on the connecting section. The mounting recess has a periphery provided with a plurality of ribs inserted into the slots of the main body.

Abstract: A method of manufacturing a semiconductor device is provided, which includes the steps of providing a capacitor structure, forming a conductive layer on the capacitor structure, performing a hydrogen doping process to the conductive layer, forming a metal layer on the conductive layer after the hydrogen doping process, and patterning the metal layer and the conductive layer to forma top electrode plate.

Abstract: A CNC single-turret twin-spindle efficiency-doubled metal processing machine includes: a chassis having a Z-axis mounting surface and a Y-axis mounting surface perpendicular to the Z-axis mounting surface; a spindle driving source mounted on the Z-axis mounting surface of the chassis; a first spindle unit arranged on the Z-axis mounting surface of the chassis and coupled to the spindle driving source; a second spindle unit arranged on the Z-axis mounting surface of the chassis and coupled to the spindle driving source so that the spindle driving source is operable to simultaneously drive the first spindle unit and the second spindle unit to do reciprocal movement on the same axis for approaching and leaving; a turret unit mounted on the Y-axis mounting surface of the chassis and including a plurality of clamp groups arranged at predetermined angles. Each of the clamp groups includes two tool clamps that respectively clamp two identical tools.

Abstract: A system and machine-implemented method of wireless network access are provided. First network credentials for a first wireless network hosted by a wireless-enabled device are received from a server. A first network connection with the wireless-enabled device in the first wireless network is established based on the first network credentials. Second network credentials for a second wireless network are provided to the wireless-enabled device via the first network connection. A second network connection with the wireless-enabled device in the second wireless network is established based on the second network credentials.

Abstract: A method of fabricating a buried word line structure includes providing a substrate with a word line trench therein. Two source/drain doped regions are disposed in the substrate at two sides of the word line trench. Later, a silicon oxide layer is formed to cover the word line trench. A titanium nitride layer is formed to cover the silicon oxide layer. Next, a tilt ion implantation process is performed to implant silicon atoms into the titanium nitride layer to transform part of the titanium nitride layer into a titanium silicon nitride layer. A conductive layer is formed in the word line trench. Subsequently, part of the conductive layer, part of the titanium silicon nitride layer and part of the silicon oxide layer are removed to form a recess. Finally, a cap layer fills in the recess.

Abstract: A C-type CNC machine center generally includes a chassis, a displaceable table, a work table, a working spindle, a coupling seat, and a driver device. The chassis has a working area, a power area, and a displacement channel communicating with the working area and the power area. The displaceable table is slidably mounted to the chassis and located in the working area. The coupling seat is slidably coupled to the base seat in the power area and includes an elongate hollow body and is fixedly mounted, with an end thereof, to the displaceable table. The driver device includes a motor mounted to the base seat in the power area and a ball screw coupled to the motor and the coupling seat to drive the coupling seat and the displaceable table to synchronously conduct reciprocal movement in a given direction. The coupling seat separates the ball screw from the working area.

Abstract: A linear slide rail includes a rail having four primary grooves respectively defined in two opposite sides of the rail. A first slide includes a first passage, and each of two opposite insides of the first passage has two first grooves. Multiple first balls contact the primary grooves and the first grooves. Each of the first grooves has a first contact angle. When a first wearing trace is formed along the rail by the first balls and the first slide, the first slide and the first balls are replaced with a second slide and multiple second balls. Each of the second grooves of the second slide has a second contact angle which is different from the first contact angle. A second wearing trace is formed along the rail by the second balls and the second slide. The first and second wearing traces are not overlapped with each other.

Abstract: A method for obtaining a diameter is provided. The method is to be applied to a multi-roller module system and includes: designating a target linear velocity associated with a wire moving in the multi-roller module system, and a value of a presumed diameter parameter associated with a diameter of a main roller; calculating an initial rotational speed of the main roller; measuring a current rotational speed of the fixed-diameter rotating component; calculating an actual linear velocity of the wire; and determining that the value of the presumed diameter parameter equals an actual diameter of the main roller when it is determined that the ratio of the target linear velocity to the actual linear velocity is equal to one.

Abstract: A method of manufacturing a semiconductor device is provided, which includes the steps of providing a capacitor structure, forming a conductive layer on the capacitor structure, performing a hydrogen doping process to the conductive layer, forming a metal layer on the conductive layer after the hydrogen doping process, and patterning the metal layer and the conductive layer to forma top electrode plate.

Abstract: A novel compound is disclosed, which comprises: a 7-membered ring segment, which is formed by a cis-stilbene segment and a bridge atom with four bonds; and a fluorene segment connecting to the bridge atom with a double bond. In addition, an organic electronic device is also disclosed, and an organic layer therein comprises the novel compound of the present invention.

Abstract: A method of fabricating a buried word line structure includes providing a substrate with a word line trench therein. Two source/drain doped regions are disposed in the substrate at two sides of the word line trench. Later, a silicon oxide layer is formed to cover the word line trench. A titanium nitride layer is formed to cover the silicon oxide layer. Next, a tilt ion implantation process is performed to implant silicon atoms into the titanium nitride layer to transform part of the titanium nitride layer into a titanium silicon nitride layer. A conductive layer is formed in the word line trench. Subsequently, part of the conductive layer, part of the titanium silicon nitride layer and part of the silicon oxide layer are removed to form a recess. Finally, a cap layer fills in the recess.

Abstract: A roll-and-press friction-driving harmonic drive gear reducer includes: a wave generator having an elliptical external contour; a flexible spline having an output end and an open annular wall connected to the output end, the open annular wall having an external circumferential surface that includes an external roll-and-press area in an annular form, the external roll-and-press area including an annular section of external teeth adjacent to an end edge and a circumferential external curved surface adjacent to the annular external teeth; and a circular spline, which has an end that is recessed to form an accommodation hole that is inwardly extended, the accommodation hole having an internal circumferential surface that includes an internal roll-and-press area, the internal roll-and-press area including an annular section of internal teeth adjacent to an end edge and a circumferential internal curved surface adjacent to the set of internal teeth.