摘要:
A single external power supply variable speed induction motor and a control method thereof are disclosed. An induction motor includes: a stator in which coils directly connected to a single-phase or 3-phase or more systematic power supply are wound; a rotor that is supported to be rotatable in the stator; a power conversion device that is attached to the rotor and controls a rotor current without connection of a separate external power supply; and a control circuit that is connected to the power conversion device and controls the power conversion device.
摘要:
A channel allocation method for use in a wireless communication environment, where Wireless Local Area Networks (WLANs) and Wireless Personal Area Networks (WPANs) coexist, includes collecting, at an access point, information on channels used by the WLANs and WPANs, determining available WLAN channels and available WPAN channels based on the channel information, allocating one of the available WLAN channels and one of the available WPAN channels to the access point, and informing the WLANs and WPANs of the allocated WLAN and WPAN channels.
摘要:
Manufacturing a wafer level stack package includes the steps of back-grinding a lower surface of a wafer including a plurality of first semiconductor chips. A support member is attached to a lower surface of the back-grinded wafer. One or more second semiconductor chips are stacked on the respective first semiconductor chips of the back-grinded wafer. First through-electrodes are formed to electrically connect the stacked first semiconductor chips and second semiconductor chips. Third semiconductor chips are attached to uppermost ones of the stacked second semiconductor chips, and the third semiconductor chips have second through-electrodes which are electrically connected to the first through-electrodes and re-distribution lines which are connected to the second through-electrodes. Outside connection terminals are attached to the re-distribution lines of the third semiconductor chips. The first semiconductor chips of a wafer level on which the second and third semiconductor chips are stacked are sawed to for semiconductor packages at a chip level.
摘要:
A wafer level chip scale package having an enhanced heat exchange efficiency with an EMF shield is presented. The wafer level chip scale package includes a semiconductor chip, an insulation layer, and a metal plate. The semiconductor chip has a plurality of bonding pads on an upper face thereof. The insulation layer is disposed over the upper face of the semiconductor chip and has openings that expose some portions of the bonding pads. The metal plate covers an upper face of the insulation layer and side faces of the semiconductor chip in which the metal plate is electrically insulated from the bonding pads.
摘要:
The present invention may provide shoes comprising an arch pad, the shoes comprising: an arch pad provided with a block seating groove that is formed in an area corresponding to the arch part of a foot; and an arch block positioned on the block seating groove and formed convexly so as to protrude from the upper surface of the arch pad such that the upper surface of the arch block pressurizes the arch part of the foot. The arch block comprises: a base portion fixed to the block seating groove; and a deformation portion which can be attached to/detached from the base portion such that the position in which the deformation portion pressurizes the arch part can be adjusted according to the position in which the deformation portion is installed on the base portion.
摘要:
Provided are a probe and an apparatus for measuring a thickness of an oxide layer of a fuel rod, capable of testing claddings of inner and outer fuel rods of a nuclear fuel assembly without disassembling the nuclear fuel assembly. The probe includes a fuel rod transfer region on which an eddy current sensor capable of continuously testing claddings of outer fuel rods of a fixed nuclear fuel assembly is mounted. Further, the apparatus includes a frame in which a cylinder driven in upward and downward directions is mounted, a first probe connected to one side of the cylinder in order to test claddings of outer fuel rods of a nuclear fuel assembly, and a second probe connected to the other side of the cylinder in order to test claddings of inner fuel rods of the nuclear fuel assembly.
摘要:
An image sensor module includes a semiconductor chip. Photodiode units are disposed in an active region of the semiconductor chip to convert light into electric signals. Pads are disposed in a peripheral region formed around the active region and the pads are electrically connected to the photodiode units. A connecting region is formed around the peripheral region. Re-distribution layers are electrically connected to respective pads and extend to the connecting region. A transparent substrate covers the photodiode units and the pads and exposes at least a portion of the re-distribution layers. Connecting layers are electrically connected to the respective re-distribution layers and extend to a top surface of the transparent substrate. Connecting members are connected to the respective connecting layers disposed on the top surface of the transparent substrate.
摘要:
Disclosed are a stacked semiconductor package and a method for manufacturing the same. The method for manufacturing a stacked semiconductor package includes preparing a substrate formed with a seed metal layer; laminating semiconductor chips having via holes aligned with one another on the seed metal layer to form a semiconductor chip module; and growing a conductive layer inside of the via holes using the seed metal layer to form a conductive growth layer inside of the via holes.
摘要:
Methods for fabricating semiconductor devices are provided including sequentially stacking hardmask layers, a first sacrificial layer, and a second sacrificial layer on a substrate, forming first mandrels on the first sacrificial layer by etching the second sacrificial layer, forming first spacers on side walls of the first mandrels, forming a photoresist pattern disposed outside a region from which the first mandrels have been removed, forming second and third mandrels by etching the first sacrificial layer using the first spacers and the photoresist pattern as respective etching masks, forming second and third spacers on side walls of the second and third mandrels, forming first and second active patterns respectively having first and second pitches by etching the hardmask layer and at least a portion of the substrate, and forming a device isolation layer so that upper portions of the first and second active patterns protrude therefrom.
摘要:
A wafer level chip scale package having an enhanced heat exchange efficiency with an EMF shield is presented. The wafer level chip scale package includes a semiconductor chip, an insulation layer, and a metal plate. The semiconductor chip has a plurality of bonding pads on an upper face thereof. The insulation layer is disposed over the upper face of the semiconductor chip and has openings that expose some portions of the bonding pads. The metal plate covers an upper face of the insulation layer and side faces of the semiconductor chip in which the metal plate is electrically insulated from the bonding pads.