摘要:
The present invention provides a SAW device package used in filters, duplexers, etc., in particular, which simplifies sealing process for protecting the active area of a SAW device. The SAW device package comprises a wiring substrate, as a package base having connection patterns, having bare chip attaching means. A bare chip is flip-bonded and attached to the attaching means on the wiring substrate while maintaining the airtight condition. A resin molding part covers the top of the bare chip to seal the device. The invention facilitates maintaining an airtight condition of the active area which affects the operational characteristics of the device, and simplifies the manufacturing processes. Furthermore, the improved structure of the wiring substrate blocks the external moisture permeation, thereby enabling the device to better withstand the external changes.
摘要:
Disclosed herein is a stack type surface acoustic wave package. The surface acoustic wave package comprises a first bare chip having a plurality of electrodes formed thereon, a second bare chip having a plurality of electrodes and via-holes formed thereon, a connecting portion electrically connecting the first bare chip to an upper surface of the second bare chip such that the electrodes of the first bare chip face the electrodes of the second bare chip, and a sealing member provided on the first and second bare chips to form an air-tight space on an operating surface between the first and second bare chips. The surface acoustic wave package can prevent deformation due to thermal impact from the outside during a packaging process, enhancing reliability of the product, minimizing the size of the product, and reducing manufacturing costs by reducing the number of components and material costs.
摘要:
The invention provides a fabrication method of an LED package for easily fabricating LED packages of excellent heat radiation characteristics. In the method, a metallic package substrate having a recess and a reflecting surface formed in the recess is prepared, and the package substrate is selectively anodized and divided into two package electrode parts divided from each other. Then, an light emitting device is mounted on the bottom of the recess. Preferably, the package substrate is a metal substrate made of Al or Al-based metal.
摘要:
An apparatus and method of transmiting/receiving a multimedia broadcats/multicats service (MBMS) is disclosed. The present invention enables ARQ and HARQ to be aplied to the MBMS transmision, thereby enabling more efficient data transmision at a greater rate.
摘要:
Disclosed herein is a vacuum processing apparatus for performing a desired process for a substrate after establishing a vacuum atmosphere therein. More particularly, the vacuum processing apparatus includes a vacuum chamber, which is divided into a chamber body and an upper cover. The upper cover is configured to be easily opened away from and closed to the chamber body.
摘要:
Methods are provided of depositing a silicon oxide film on a substrate disposed in a substrate processing chamber. The substrate has a gap formed between adjacent raised surfaces. A silicon-containing gas, an oxygen-containing gas, and a fluent gas are flowed into the substrate processing chamber. The fluent gas has an average molecular weight less than 5 amu. A first high-density plasma is formed from the silicon-containing gas, the oxygen-containing gas, and the fluent gas to deposit a first portion of the silicon oxide film over the substrate and within the gap with a first deposition process that has simultaneous deposition and sputtering components having relative contributions defined by a first deposition/sputter ratio. A second high-density plasma is formed from the silicon-containing gas, the oxygen-containing gas, and the fluent gas to deposit a second portion of the silicon oxide film over the substrate and within the gap with a second deposition process that has simultaneous deposition and sputtering components having relative contributions defined by a second deposition/sputter ratio. The second deposition/sputter ratio is less than the first deposition/sputter ratio. Each of the first and second deposition/sputter ratios is defined as a ratio of a sum of a net deposition rate and a blanket sputtering rate to the blanket sputtering rate.
摘要:
A printed circuit board (PCB) having a three-dimensional spiral inductor, which includes a plurality of insulating layers and conductor layers. The PCB comprises a plurality of coil conductor patterns made of conductive material and shaped into strips, which is provided on the plurality of conductor layers, respectively, such that the plurality of coil conductor patterns are parallel to each other and positioned on the same plane perpendicular to the conductor layers, and in which each of the plurality of coil conductor patterns is longer than an adjacent inner coil conductor pattern.
摘要:
The present invention provides an electroactive solid-state actuator, including a solid polymer electrolyte film having first and second main surfaces facing each other, and first and second conductive polymer layers infiltrated into the first and second main surfaces of the solid polymer electrolyte film. Further, a method of manufacturing the electroactive solid-state actuator is provided, the method including preparing a solid polymer film having first and second main surfaces facing each other, infiltrating a monomer of a conductive polymer into the first and second main surfaces of the solid polymer film, followed by polymerization, to form first and second conductive polymer layers, and immersing the solid polymer film into an ionic liquid or liquid electrolyte to be converted to an electrically conductive polymer.
摘要:
The present invention relates to notifying updated control information of a point-to-multipoint service in a wireless communications system. An indication about whether control channel information has been updated is transmitted and received during a time interval where data of the point-to multipoint service is not transmitted between a network and a mobile terminal. Furthermore, and indication about whether the control channel information has been updated is transmitted and received via a physical channel, to which a traffic channel is mapped. This allows the mobile terminal, which receives data of a specific point-to-multipoint service discontinuously, to effectively recognize whether the control channel information has been updated.
摘要:
The present invention provides a flat fluorescent lamp. The flat fluorescent lamp comprises a single plate. Consequently, the flat fluorescent lamp is structurally safe, brightness of the flat fluorescent lamp is high, and efficiency of the flat fluorescent lamp is also high without the provision of other additional optical components. The present invention also provides a method of manufacturing such a flat fluorescent lamp.