Abstract: A keyboard including a key module is provided. The key module includes a keycap, a rigid modular circuit board and a linkage element. The linkage element is located between the keycap and the modular circuit board. The key module is detachably disposed on the keyboard, so that the key module, either in its entirety or as a part, could be disassembled from or assembled to the keyboard.

Abstract: An antenna module includes two antenna units, two isolation members, and a grounding member. Each antenna unit consists of two feeding ends, two first radiators, and two second radiators. The isolating members are disposed between the first and second portions of each antenna unit. The grounding member is disposed beside the two antenna units and the two isolation members. A first slot is formed among each first radiator, the second radiator, and the grounding member. The two second radiators are connected to the third radiator. A third slot is formed between the second radiator and the second portion. The two antenna units are symmetric to the fourth slot in a mirrored manner, and the two first portions have widths gradually changing along an extending direction of the fourth position.

Abstract: A key module and a keyboard are disclosed. The key module includes a bottom plate including a first opening; a keycap disposed on the bottom plate, and including a visible region corresponding to the first opening; a flexible component disposed between the bottom plate and the keycap, and including a second opening corresponding to the visible region; a support structure connected between the bottom plate and the flexible component, and including a third opening corresponding to the visible region; a circuit layer disposed between the bottom plate and the flexible component, and including a fourth opening corresponding to the visible region; and a pattern modulator disposed below the bottom plate, and including a pattern region corresponding to the visible region.

Abstract: A keyboard structure including a base, at least one key and an electronic element is provided. The key is disposed on the base and sequentially includes a cap, a limiting structure, an elastic member and a membrane switch from top to down, wherein the elastic member is disposed on the membrane switch, the cap is disposed on the elastic member, and the limiting structure connects the cap and the base, such that the cap is configured to move relative to the base in a vertical direction. The electronic element is disposed on the membrane switch and is surrounded by an electrostatic protection zone, wherein the membrane switch has a hole corresponding to the electrostatic protection zone.

Abstract: A framework structure and a keyboard device are provided. The framework structure is applicable to a keyboard module. The keyboard module includes multiple standard keys and multiple function keys. The framework structure includes a frame and a rib portion. The frame correspondingly surrounds the keyboard module. The rib portion is formed in the frame and divides the area in the frame into a first region and a second region. The first region corresponds to the area defined by the standard keys of the keyboard module, and the second region corresponds to the function keys of the keyboard module.

Abstract: A key switch structure and an assembling method thereof are provided. The key switch structure includes a bottom plate, a keycap, a supporting assembly, first connectors, and second connectors. The keycap is disposed on the bottom plate. The supporting assembly is disposed between the bottom plate and the keycap. The first connectors disposed on the bottom plate are integrally formed and directly bonded to the upper surface of the bottom plate, wherein the first connectors and the bottom plate are made of different materials. The second connectors are disposed on the keycap. The supporting assembly is connected to the bottom plate and the keycap through the first connectors and the second connectors.

Abstract: A spirit level includes a housing having an elongated body and a level tube set and a lighting device mounted in the body of the housing. The body has a recessed accommodation chamber and two positioning grooves connected to the recessed accommodation chamber and disposed adjacent to the end portions of the level tubes of the level tube set. The lighting device includes a controller mounted in the recessed accommodation chamber and a plurality of light-emitting devices respectively mounted in the positioning grooves for illuminating the level tubes so that the user can see the level tubes. The invention simplifies the assembly of the spirit level and makes it easy to repair or replace the light-emitting devices of the lighting device without increasing the height or thickness of the spirit level.

Abstract: A framework structure and a keyboard device are provided. The framework structure is applicable to a keyboard module. The keyboard module includes multiple standard keys and multiple function keys. The framework structure includes a frame and a rib portion. The frame correspondingly surrounds the keyboard module. The rib portion is formed in the frame and divides the area in the frame into a first region and a second region. The first region corresponds to the area defined by the standard keys of the keyboard module, and the second region corresponds to the function keys of the keyboard module.

Abstract: A keyboard structure including a base, at least one key and an electronic element is provided. The key is disposed on the base and sequentially includes a cap, a limiting structure, an elastic member and a membrane switch from top to down, wherein the elastic member is disposed on the membrane switch, the cap is disposed on the elastic member, and the limiting structure connects the cap and the base, such that the cap is configured to move relative to the base in a vertical direction. The electronic element is disposed on the membrane switch and is surrounded by an electrostatic protection zone, wherein the membrane switch has a hole corresponding to the electrostatic protection zone.

Abstract: A spirit level includes a housing having an elongated body and a level tube set and a lighting device mounted in the body of the housing. The body has a recessed accommodation chamber and two positioning grooves connected to the recessed accommodation chamber and disposed adjacent to the end portions of the level tubes of the level tube set. The lighting device includes a controller mounted in the recessed accommodation chamber and a plurality of light-emitting devices respectively mounted in the positioning grooves for illuminating the level tubes so that the user can see the level tubes. The invention simplifies the assembly of the spirit level and makes it easy to repair or replace the light-emitting devices of the lighting device without increasing the height or thickness of the spirit level.

Abstract: The present invention discloses a laser level, which includes a top surface and a bottom surface parallel to each other, and a main body to be installed with a plurality of vials. One end of said main body has an integrally extended configuration of a base. Said base is pivotally connected to one end of a connector, while the other end of said connector is bound with a laser module, so that the laser module can rotate freely around the pivot between the connector and the base to adjust the projection angle of the laser beam.

Abstract: The present invention discloses a laser level, which includes a top surface and a bottom surface parallel to each other, and a main body to be installed with a plurality of vials. One end of said main body has an integrally extended configuration of a base. Said base is pivotally connected to one end of a connector, while the other end of said connector is bound with a laser module, so that the laser module can rotate freely around the pivot between the connector and the base to adjust the projection angle of the laser beam.

Abstract: A key switch structure and an assembling method thereof are provided. The key switch structure includes a bottom plate, a keycap, a supporting assembly, first connectors, and second connectors. The keycap is disposed on the bottom plate. The supporting assembly is disposed between the bottom plate and the keycap. The first connectors disposed on the bottom plate are integrally formed and directly bonded to the upper surface of the bottom plate, wherein the first connectors and the bottom plate are made of different materials. The second connectors are disposed on the keycap. The supporting assembly is connected to the bottom plate and the keycap through the first connectors and the second connectors.

Abstract: A level includes a top surface, a bottom surface parallel with the top surface, and a body accommodating at least one vial. The body has at least one through hole, at least one portion of the vial is exposed through the through hole, a close-ended locating hole is mounted at a side of the through hole, an opened-ended locating hole is mounted at another side of the through hole, and two sides of the vial are accommodated in the two locating holes respectively. A side of the opened-ended locating hole is mounted with a locating aperture so that a magnet is positioned in the locating aperture so as to fix the vial.

Abstract: A level includes a top surface, a bottom surface parallel with the top surface, and a body accommodating at least one vial. The body has at least one through hole, at least one portion of the vial is exposed through the through hole, a close-ended locating hole is mounted at a side of the through hole, an opened-ended locating hole is mounted at another side of the through hole, and two sides of the vial are accommodated in the two locating holes respectively. A side of the opened-ended locating hole is mounted with a locating aperture so that a magnet is positioned in the locating aperture so as to fix the vial.

Abstract: Integrated circuits with electrostatic discharge (ESD) protection circuitry are provided. Integrated circuits may include input-output pins that are coupled to the ESD protection circuitry. The ESD protection circuitry may include diode circuits, a control circuit, and a power clamp circuit. Each diode circuit may have a first terminal that is coupled to a respective input-output pin and a second terminal that is coupled to a shared ESD control line. The control circuit may supply a boosted voltage onto the control line to reverse bias the diode circuits during normal operation while the power clamp is turned off. During an ESD event, the power clamp may be turned on to sink current from the diode circuits. The power clamp may include a transistor having a substrate that is forward biased to improve transistor drive strength during the ESD event and that is reverse biased to reduce leakage during normal operation.

Abstract: An electrostatic discharge (ESD) protection circuit includes an electrostatic discharge bus, first and second resistors coupled in series, first and second capacitors coupled in series, and first and second transistors. The first resistor is coupled to the electrostatic discharge bus. The first capacitor is coupled to the second resistor. The first transistor has a control input that is coupled between the first and the second resistors. The second transistor has a control input that is coupled between the first and the second capacitors.

Abstract: A contact fuse is provided. The contact fuse includes a metal oxide semiconductor (MOS) transistor and a control circuit having outputs coupled to a plurality of terminals of the MOS transistor. The control circuit is operable to forward bias a body-source junction during a programming operation and operable to short the body-source junction during a sensing operation. A method of operating a contact fuse is also provided.

Abstract: An integrated circuit with electrically programmable fuse circuitry coupled to a programming transistor is provided. The programming transistor may be a metal-oxide-semiconductor transistor that is separated from other circuitry in an integrated circuit substrate with shallow trench isolation. The electrically programmable fuse circuitry may be formed in a second layer above the integrated circuit substrate using a conductive material which may be tungsten-based. This second layer may further include interconnect wires made from the same conductive material. The electrically programmable fuse may be coupled to the programming transistor through vias and routing paths in a fourth layer above the integrated circuit substrate. The routing paths in the fourth layer may be made from a conductive material which may be different than the fuse conductive material used to form the programmable fuse circuitry.

Abstract: An electrostatic discharge (ESD) protection structure comprising a polysilicon gate on an insulating layer on a substrate, said gate having first and second sides, a first heavily doped P-region in the substrate on the first side of the gate, a first heavily doped N-region in the substrate on the second side of the gate, and a shallow trench isolation isolating said first P-region and said first N-region from other structures in the substrate. In a first embodiment, the heavily doped regions are formed in a well having opposite conductivity to that of the substrate and a diode is formed at a PN junction between one of the heavily doped regions and the well. To minimize capacitance between the well and the substrate, the substrate is doped at a level of native doping and the well is isolated so that no other wells or heavily-doped regions are nearby in the substrate. Doping levels in the well and the dimensions of the gate are controlled to minimize on resistance (Ron) of the diode.