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    • 47. 发明授权
    • III-nitride device and method with variable epitaxial growth direction
    • III族氮化物器件和具有可变外延生长方向的方法
    • US07491627B2
    • 2009-02-17
    • US11894850
    • 2007-08-22
    • Robert BeachPaul Bridger
    • Robert BeachPaul Bridger
    • H01L21/36H01L21/20
    • H01L29/66325H01L29/2003
    • A semiconductor device composed of III-nitride materials is produced with epitaxial growth that permits vertical and lateral growth geometries to improve device characteristics. The resulting device has a greater breakdown voltage due to the greater integrity of the semiconductor material structure since no ion implantation processes are used. The epitaxially grown layers also exhibit greater thermal conductivity for improved operation with power semiconductor devices. The device may include a laterally grown charge compensated area to form a superjunction device. The resulting device may be bidirectional and have improved breakdown voltage in addition to higher current capacity for a given voltage rating.
    • 由III族氮化物材料制成的半导体器件由外延生长制成,允许垂直和侧向生长几何形状来改善器件特性。 由于没有使用离子注入工艺,所以由于半导体材料结构的更高的完整性,所得到的器件具有更大的击穿电压。 外延生长的层还表现出更大的导热性,以改善功率半导体器件的工作。 该装置可以包括横向生长的电荷补偿区域以形成超连接装置。 所得到的器件可以是双向的,并且除了给定额定电压的较高电流容量之外还具有改进的击穿电压。
    • 49. 发明申请
    • Field effect transistor with enhanced insulator structure
    • 具有增强的绝缘体结构的场效应晶体管
    • US20070298556A1
    • 2007-12-27
    • US11895096
    • 2007-08-23
    • Robert Beach
    • Robert Beach
    • H01L21/338
    • H01L29/7787H01L29/2003
    • A III-nitride based field effect transistor obtains improved performance characteristics through manipulation of the relationship between the in-plane lattice constant of the interface of material layers. A high mobility two dimensional electron gas generated at the interface of the III-nitride materials permits high current conduction with low ON resistance, and is controllable through the manipulation of spontaneous polarization fields obtained according to the characteristics of the III-nitride material. The field effect transistor produced can be made to be a nominally on device where the in-plane lattice constants of the material forming the interface match. A nominally off device may be produced where one of the material layers has an in-plane lattice constant that is larger than that of the other layer material. The layer materials are preferably InAlGaN/GaN layers that are particularly tailored to the characteristics of the present invention.
    • 基于III族氮化物的场效应晶体管通过处理材料层的界面的面内晶格常数之间的关系来获得改进的性能特性。 在III族氮化物材料的界面处产生的高迁移率二维电子气体允许具有低导通电阻的高电流传导,并且可以通过操纵根据III族氮化物材料的特性获得的自发极化场来控制。 所产生的场效应晶体管可以在名义上成为形成界面的材料的面内晶格常数匹配的器件上。 可以制造名义上关闭的装置,其中材料层之一的面内晶格常数大于其它层材料的面内晶格常数。 层材料优选是特别适合于本发明特征的InAlGaN / GaN层。
    • 50. 发明申请
    • Power Saving Function for Wireless Lans: Methods, System and Program Products
    • 无线蓝牙的节能功能:方法,系统和程序产品
    • US20070230386A1
    • 2007-10-04
    • US11538324
    • 2006-10-03
    • Robert Beach
    • Robert Beach
    • H04L12/56
    • H04L47/24H04W52/0216Y02D70/142Y02D70/23
    • A wireless data communication system has a first station or mobile unit is linked to a second station configured as an access unit to support packet communication, voice or data, where the voice packets are transmitted in the Continuously Aware Mode (CAM) mode while other packets are buffered by the access point and held until asked for by the first station when in a Power Saving-Poll (PSP) mode. A monitoring apparatus at the access point monitors all transmitted packets and sorts the packets to the mobile unit according to CAM or PSP mode. Voice packets are sent out immediately to the mobile unit. Other packets are stored at the access point. The packet arrival rate may vary during transmission and due to random packet delays introduced by propagation characteristic and processing apparatus. The packet arrival rate and delays are taken into account by the first station in an algorithm to determine and extend the normal safe period in which the station receiver may be powered off.
    • 无线数据通信系统具有第一站或移动单元被链接到配置为接入单元的第二站,以支持分组通信,语音或数据,其中语音分组以连续感知模式(CAM)模式发送,而其他分组 由PSP(Power Saving-Poll)模式被接入点缓冲并保持到第一站所要求的时间。 接入点处的监视装置监视所有发送的分组,并根据CAM或PSP模式将分组分类到移动单元。 语音数据包立即发送到移动单元。 其他数据包存储在接入点。 分组到达速率可以在传输期间和由于传播特性和处理设备引入的随机分组延迟而变化。 分组到达速率和延迟由第一站在算法中考虑以确定和扩展站接收机可以断电的正常安全期。