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    • 36. 发明授权
    • Recovery of electronic properties in process-damaged ferroelectrics by voltage-cycling
    • 通过电压循环恢复工艺损坏的铁电体中的电子特性
    • US06171934B2
    • 2001-01-09
    • US09144297
    • 1998-08-31
    • Vikram JoshiNarayan SolayappanWalter HartnerG{umlaut over (u)}nther Schindler
    • Vikram JoshiNarayan SolayappanWalter HartnerG{umlaut over (u)}nther Schindler
    • H01L21326
    • H01L27/11502H01L27/11507H01L28/55
    • An integrated circuit is formed containing a metal-oxide ferroelectric thin film. An voltage-cycling recovery process is conducted to reverse the degradation of ferroelectric properties caused by hydrogen. The voltage-cycling recovery process is conducted by applying from 104 to 1011 voltage cycles with a voltage amplitude of from 1 to 15 volts. Conducting voltage-cycling at a higher temperature in the range 30-200° C. enhances recovery. Preferably the metal oxide thin film comprises layered superlattice material. Preferably the layered superlattice material comprises strontium bismuth tantalate or strontium bismuth tantalum niobate. If the integrated circuit manufacture includes a forming-gas anneal, then the voltage-cycling recovery process is performed after the forming-gas anneal. The voltage-cycling recovery process obviates oxygen-recovery annealing, and it allows continued use of conventional hydrogen-rich plasma processes and forming-gas anneals without the risk of permanent damage to the ferroelectric thin film.
    • 形成含有金属氧化物铁电体薄膜的集成电路。 进行电压循环恢复处理以逆转由氢引起的铁电性能的降低。 通过施加电压幅度为1至15伏特的104至1011个电压周期来执行电压循环恢复过程。 在30-200℃范围内的较高温度下进行电压循环,提高了回收率。 优选地,金属氧化物薄膜包括层状超晶格材料。 优选地,层状超晶格材料包括钽酸铋钽铋或铌酸铋钽酸铋。 如果集成电路制造包括成形气体退火,则在成形气体退火之后执行电压循环恢复过程。 电压循环恢复过程避免氧回收退火,并且其允许继续使用常规富氢等离子体工艺和形成气体退火,而不会对铁电薄膜造成永久损坏的风险。
    • 39. 发明授权
    • Maintaining item-to-node mapping information in a distributed system
    • 在分布式系统中维护项目到节点映射信息
    • US08671151B2
    • 2014-03-11
    • US11657778
    • 2007-01-24
    • Vikram JoshiAlexander TsukermanArvind NithrakashvapJia ShiTudor Bosman
    • Vikram JoshiAlexander TsukermanArvind NithrakashvapJia ShiTudor Bosman
    • G06F15/16
    • G06F17/30557
    • A method and apparatus for maintaining an item-to-node mapping among nodes in a distributed cluster is provided. Each node maintains locally-stored system-state information indicating that node's understanding of which master nodes are alive and dead. Instead of employing a global item-to-node mapping, each node acts upon a locally determined mapping based on its locally-stored system-state information. For any two nodes with the same locally-stored system-state information, the locally determined mapping is the same. A node updates its locally-stored system-state information upon detecting a node failure or receiving a message from another node indicating different locally-stored system-state information. The new locally-stored system-state information is transmitted on a need-to-know basis, and consequently nodes with different item-to-node mappings may operate concurrently. Mechanisms to avoid nodes assuming conflicting ownership of items are employed, thus allowing node failures to propagate via asynchronous messaging instead of requiring a cluster-wide synchronization event.
    • 提供了一种用于在分布式集群中的节点之间维护项目到节点映射的方法和装置。 每个节点维护本地存储的系统状态信息,指示节点了解哪些主节点存活和死亡。 代替采用全局项目到节点映射,每个节点基于其本地存储的系统状态信息在本地确定的映射上作用。 对于具有相同本地存储的系统状态信息的任何两个节点,本地确定的映射是相同的。 当节点检测到节点故障或从另一节点接收到指示不同的本地存储的系统状态信息的消息时,节点更新其本地存储的系统状态信息。 新的本地存储的系统状态信息是在需要知道的基础上传输的,因此具有不同项目到节点映射的节点可以同时运行。 采用避免节点假设项目所有权冲突的机制,从而允许节点故障通过异步消息传播,而不需要群集范围的同步事件。