Abstract: A device includes a top dielectric layer having a top surface. A metal pillar has a portion over the top surface of the top dielectric layer. A non-wetting layer is formed on a sidewall of the metal pillar, wherein the non-wetting layer is not wettable to the molten solder. A solder region is disposed over and electrically coupled to the metal pillar.

Abstract: A package component is free from active devices therein. The package component includes a substrate, a through-via in the substrate, a top dielectric layer over the substrate, and a metal pillar having a top surface over a top surface of the top dielectric layer. The metal pillar is electrically coupled to the through-via. A diffusion barrier is over the top surface of the metal pillar. A solder cap is disposed over the diffusion barrier.

Abstract: A four-fiber collimator is coupled to the optics of a single interleaver to produce the functionality of two co-packaged interleavers. Two fibers of the collimator are coupled to the core optics of a single interleaver to produce two pairs of output beams. The other two fibers of the collimators are coupled to receive the reflection output beams. The geometry of the optical fibers in the bundle is controlled to produce interleaver outputs with no offset. In another embodiment two fibers of the four-fiber collimator are coupled as inputs to and the other two fibers as outputs from a Fabry-Perot etalon. The geometry of the fibers and the focal length of the collimator are controlled to produce two outputs with peaks offset by a predetermined amount.

Abstract: In a grating based tunable filter, an input beam that includes multiple wavelengths is directed into an input fiber of a circulator. The beam is collimated and then is reflected by a rotationally actuated mirror. The beam is then magnified and propagates onto and through a transmission diffraction grating which causes the different wavelengths of the transmitted beam to deflect into different angles.

Abstract: A DPSK demodulator is implemented in Sagnac interferometer configuration with a delay line element introduced in one or both of the optical paths of the transmitted and reflected beams. Because the two reflected and transmitted beams travel on the same optical path (though in opposite directions), the Sagnac interferometer provides all the advantages of a common-path interferometer, is thermally and mechanically stable, and the phase requirements are greatly reduced. In its simplest form, the Sagnac DPSK demodulator. In the preferred embodiment, the beam-splitting surface and one of the mirrors are combined into a rhomb beam-splitter structure and the other two mirrors into a right-angle prism. In a DQPSK embodiment, the input beam is split by an upfront beam splitter into two parallel beams that are then directed toward the rhomb-beam-splitter/right-angle-prism combination of the invention.

Abstract: A liquid crystal display panel including an active device array substrate, an opposite substrate, a plurality of spacers and a liquid crystal layer is provided. The active device array substrate includes a plurality of position limiting structures, each including a first and a second position limiting pattern. The opposite substrate is disposed above the active device array substrate. The spacers are disposed on the opposite substrate, and the spacers are protruded towards the active device array substrate and extended adjacent to the first and second position limiting patterns. Displacement of each spacer is limited by the first or second position limiting pattern. The first position limiting patterns limit the displacement of a portion of the spacers along a first azimuth range, the second position limiting patterns limit the displacement of a portion of the spacers along a second azimuth range, and the first and second azimuth ranges are different.

Abstract: A switchable free-spectral-range mode selector is used to change the free spectral range of a free-space delay-line interferometer. The mode selector consists of a rotatable device with at least one transparent plate selected to produce the desired change in the free spectral range of the delay-line interferometer. The device may be rotated in and out of the free-space optical path of on of the interferometer arms. If used as a DPSK demodulator, the device enables operation at multiple predetermined free spectral ranges. In the preferred embodiment, the demodulator includes a 50/50 beam-splitter cube combined with two cavities. The mode selector consists of a plurality of different transparent slabs attached to a rotatable shaft so that any one of the slabs or none may be inserted in the appropriate optical path to obtain the desired FSR mode of operation.

Abstract: A data storage device, a stacking method thereof, and a data storage device assembly are provided. The data storage device assembly includes a first data storage device and a second data storage device respectively having a body, a magnetic element, and a storage device. Each body has a first containing space and a second containing space. Each magnetic element is disposed in the corresponding first containing space. At least one of the magnetic elements of the first and the second data storage device is a magnet. Each storage device is disposed in the corresponding second containing space and includes an electrical connector terminal, a memory chip, and a memory controller with no crystal oscillator. The magnetic elements of the first and the second data storage device attract each other so that the body of the first data storage device is stacked on the body of the second data storage device.

Abstract: Rhomb beam splitters are used to implement various optical demodulators, in particular PSK and DPSK demodulators. The parallel beam-splitting and reflective surfaces of the rhomb structure produce reflection and transmission beams that exit the beam splitter parallel to one another and with a relative phase shift determined by the distance between the surfaces. These features afford the advantages of low cost, compactness, easily tunable, and temperature-insensitive optical structures for constructing a variety of optical demodulators.

Abstract: The invention provides a method for forming a light emitting device. A first substrate is provided. A plurality of patterned masks is formed on the first substrate, or on a semiconductor epitaxial layer grown on the first substrate, or the first substrate is etched to form a plurality of trenches, followed by performing an epitaxial lateral overgrowth process to grow an epitaxy layer over the first substrate. A light emitting structure is formed on the epitaxy layer. A first electrode layer is formed on the light emitting structure. The light emitting structure is wafer bonded to a second substrate. A photoelectrochemical etching process is performed to lift off the first substrate from the epitaxy layer.

Abstract: An electronic input device with piezoelectric sensor is provided, the electronic input device includes a housing, a piezoelectric sensing layer provided on the surface of the housing, an electrode plate provided and served to cover on top of the piezoelectric sensing layer. When a user's skin is in contact with the electrode plate, galvanic skin signals that represent the user's physiology status are transferred to the input device, meanwhile the piezoelectric sensing layer sends piezoelectric signals corresponding to the pressing level pressed by the user. When the piezoelectric sending layer is pressed to a proper level, effective galvanic skin signals are determined to the input device.

Abstract: The invention provides a method for forming a light emitting device. A first substrate is provided. A plurality of patterned masks is formed on the first substrate, or on a semiconductor epitaxial layer grown on the first substrate, or the first substrate is etched to form a plurality of trenches, followed by performing an epitaxial lateral overgrowth process to grow an epitaxy layer over the first substrate. A light emitting structure is formed on the epitaxy layer. A first electrode layer is formed on the light emitting structure. The light emitting structure is wafer bonded to a second substrate. A photoelectrochemical etching process is performed to lift off the first substrate from the epitaxy layer.

Abstract: Rhomb beam splitters are used to implement various optical demodulators, in particular PSK and DPSK demodulators. The parallel beam-splitting and reflective surfaces of the rhomb structure produce reflection and transmission beams that exit the beam splitter parallel to one another and with a relative phase shift determined by the distance between the surfaces. These features afford the advantages of low cost, compactness, easily tunable, and temperature-insensitive optical structures for constructing a variety of optical demodulators.

Abstract: The invention provides a wedge pair suitable for use in interferometers. The wedge pair produces a phase shift between beams of light propagating in the interferometer. The invention includes a wedge pair and a mechanism for translating a first wedge of the pair with respect to a second wedge of the pair, where the first wedge has the same wedge angle and material of the second wedge and where the vertex of the first wedge and the vertex of the second wedge are pointed in opposite directions.

Abstract: The present invention discloses a method of cooling an ultramobile device with microfins attached to an external wall of an enclosure surrounding the ultramobile device.

Abstract: The present invention discloses a method of cooling an ultramobile device with microfins attached to an external wall of an enclosure surrounding the ultramobile device.

Abstract: A liquid crystal display panel including an active device array substrate, an opposite substrate, a plurality of spacers and a liquid crystal layer is provided. The active device array substrate includes a plurality of position limiting structures, each including a first and a second position limiting pattern. The opposite substrate is disposed above the active device array substrate. The spacers are disposed on the opposite substrate, and the spacers are protruded towards the active device array substrate and extended adjacent to the first and second position limiting patterns. Displacement of each spacer is limited by the first or second position limiting pattern. The first position limiting patterns limit the displacement of a portion of the spacers along a first azimuth range, the second position limiting patterns limit the displacement of a portion of the spacers along a second azimuth range, and the first and second azimuth ranges are different.

Abstract: An absorptive coating is in contact with an optical beam splitter such that a signal beam and a reference beam incident on the beam splitter from opposite sides are can be combined to produce two interference beams having a phase difference of about ? 2 .

Abstract: A 3D semiconductor package using an interposer is provided. In an embodiment, an interposer is provided having a first die electrically coupled to a first side of the interposer and a second die electrically coupled to a second side of the interposer. The interposer is electrically coupled to an underlying substrate, such as a packaging substrate, a high-density interconnect, a printed circuit board, or the like. The substrate has a cavity such that the second die is positioned within the cavity. The use of a cavity may allow smaller conductive bumps to be used, thereby allowing a higher number of conductive bumps to be used. A heat sink may be placed within the cavity to aid in the dissipation of the heat from the second die.

Abstract: An optical spectrum analyzer is implemented with a detector combined with a tunable filter mounted on a stage capable of 360-degree rotation at a constant velocity. Because of the constant rate of angular change, different portions of the input spectrum are detected at each increment of time as a function of filter position, which can be easily measured with an encoder for synchronization purposes. The unidirectional motion of the mirror permits operation at very high speeds with great mechanical reliability. The same improvements may be obtained using a diffraction grating or a prism, in which case the detector or an intervening mirror may be rotated instead of the grating or prism.