Abstract:
A micromirror device package includes a micromirror device chip having a micromirror device area on an upper surface of the micromirror device chip. A window is mounted above the micromirror device area and to the upper surface of the micromirror device chip by a bead. By forming the window of borosilicate glass and the bead of solder glass, the micromirror device area is hermetically sealed. In this manner, corrosion and contamination of the micromirror device area is prevented.
Abstract:
An image sensor package includes a molding having an interior locking feature and an exterior locking feature. The molding is a low cost molded part. The image sensor package further includes a window having an interior surface and an exterior surface. The exterior locking feature of the molding contacts a periphery of the exterior surface of the window and the interior locking feature of the molding contacts a periphery of the interior surface of the window. In this manner, the window is supported by the molding both top and bottom. Also, the distance which moisture must travel along the interface between the molding and window to reach the image sensor is maximized thus essentially eliminating moisture ingress into the image sensor package.
Abstract:
A plurality of pressure sensor dice are attached to an array of pressure sensor die attach sites located on a custom substrate having holes. The pressure sensor dice are then electrically connected to the pressure sensor die attach sites using standard flip chip techniques. The resulting array of pressure sensor sub-assemblies is then molded, so that a cavity is formed that is open at the bottom of each hole in the custom substrate. A portion of the outer surface of the micro-machine element of each pressure sensor die is left exposed at the bottom of the hole in the substrate. After molding, the exposed outer surface of the micro-machine element is covered with a pressure coupling gel applied in the hole. The resulting array of packaged pressure sensors are then sigulated using well know sawing or laser techniques or by snapping a specially formed snap array.
Abstract:
A miniature radio-frequency identification (RFID) transceiver and a method for making the same are provided. The RFID transceiver is small in size and physically rugged. The RFID transceiver includes an integrated circuit and a radio-frequency antenna that is fixed to the integrated circuit and electrically connected to the integrated circuit. The integrated circuit includes an RFID transceiver circuit. The antenna may be a single thin-film layer over the top surface of the integrated circuit or multiple layers that form a larger antenna in a compact, folded structure. Multiple antenna layers may also be used to form a three-dimensional structure for improved antenna operation or may be used to form separate, independent antennas.
Abstract:
An electronic device, such as a sensor die, is packaged by first forming a hole through a substrate. The hole is made large enough to position the entire electronic device within the hole. A tape is then applied to the second surface of the substrate to cover a second side of the hole, thereby creating a tape surface at the bottom of the hole. The electronic device is then positioned within the hole such that the electronic device is in contact with, and adhered to, the tape surface at the bottom of the hole. Electronic connections are made between the electronic device and the substrate and a layer of encapsulant is applied. In one embodiment, the electronic device is a sensor die and an optical element is positioned over an active region of the sensor die before the encapsulant is applied. The encapsulant then surrounds and holds the optical element in position over the active region of the sensor die.
Abstract:
Image sensor packages are fabricated simultaneously to minimize the cost associated with each individual image sensor package. To fabricate the image sensor packages, windows are molded in molding compound to form a molded window array. A substrate includes a plurality of individual substrates integrally connected together in an array format. Image sensors are attached and electrically connected to corresponding individual substrates. An adhesive layer attaches the molded window array to the substrate. The substrate and attached molded window array are singulated into a plurality of individual image sensor packages.
Abstract:
An improved safety control mechanism for a pulley apparatus of the type comprising main support bars having at least two wheels mounted at their centers a spaced distance apart between the bars and a swing arm assembly pivotally connected to the bars at a point between the centers of the wheels, the swing arm assembly comprising a pair of arms straddling opposing surfaces of the bars and pivotally connected to the bars by a main pivot mechanism extending through complementary aligned apertures in the arms and the bars, the improvement comprising a second bolt mechanism extending through a second complementary aperture disposed in either the bars or the arms and a slot disposed in the other of the bars or the arms; the second aperture or the slot provided in the bars being disposed in the second distance between the center mountings of the wheels; the second aperture or the slot provided in the arms being aligned with the other of the second aperture or the slot provided in the bars with the arms and the bars connected by the main pivot bolt; the slot having an arcuate engagement surface which follows the pivot of the arms and engages the second bolt mechanism against detachment of the arms upon failure of the main pivot bolt; the second aperture and the slot being disposed around the complementary aligned apertures through which the main pivot bolt extends.