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    • 31. 发明申请
    • Flash memory device with NAND architecture with reduced capacitive coupling effect
    • 具有NAND架构的闪存器件具有降低的电容耦合效应
    • US20060285387A1
    • 2006-12-21
    • US11445491
    • 2006-05-31
    • Rino MicheloniRoberto RavasioIiaria Motta
    • Rino MicheloniRoberto RavasioIiaria Motta
    • G11C16/04
    • G11C16/3404G11C16/3409
    • A NAND flash memory device includes a matrix of memory cells each having a threshold voltage. The matrix includes an individually erasable sector and is arranged in plural rows and columns with the cells of each column arranged in plural strings of cells connected in series. The memory device includes logic that erases the cells of a selected sector, and restoring logic that restores the threshold voltage of the erased cells. The restoring logic acts in succession on each of plural blocks of the sector, each block including groups of one or more cells. The restoring logic reads each group with respect to a limit value exceeding a reading reference value, programs only each group wherein the threshold voltage of at least one cell does not reach the limit value, and stops the restoring in response to reaching the limit value by at least one set of the groups.
    • NAND闪速存储器件包括每个具有阈值电压的存储器单元矩阵。 矩阵包括单独的可擦除扇区,并且被布置成多行和列,其中每列的单元被排列成串联连接的多个单元格单元。 存储器件包括擦除所选扇区的单元的逻辑,以及恢复已擦除单元的阈值电压的恢复逻辑。 恢复逻辑依次作用于扇区的多个块中的每个块,每个块包括一个或多个单元的组。 恢复逻辑相对于超过读取参考值的极限值读取每个组,仅对至少一个单元的阈值电压未达到极限值的每个组进行编程,并响应于达到极限值而停止恢复 至少一组这些组。
    • 38. 发明申请
    • NAND FLASH MEMORY DEVICE WITH ECC PROTECTED RESERVED AREA FOR NON-VOLATILE STORAGE OF REDUNDANCY DATA
    • 具有ECC保护区域的NAND闪存存储器件,用于非易失存储冗余数据
    • US20080065937A1
    • 2008-03-13
    • US11854685
    • 2007-09-13
    • Rino MicheloniRoberto RavasioAlessia Marelli
    • Rino MicheloniRoberto RavasioAlessia Marelli
    • G11C29/04
    • G11C29/82G06F11/1068G11C29/24G11C2029/0411
    • Basic redundancy information is non-volatily stored in a reserved area of an addressable area of a memory array, and is copied to volatile storage therein at every power-on of the memory device. The unpredictable though statistically inevitable presence of failed array elements in such a reserved area of the memory array corrupts the basic redundancy information established during the test-on wafer (EWS) phase of the fabrication process. This increases the number of rejects, and lowers the yield of the fabrication process. This problem is addressed by writing the basic redundancy data in the reserved area of the array with an ECC technique using a certain error correction code. The error correction code may be chosen among majority codes 3, 5, 7, 15 and the like, or the Hamming code for 1, 2, 3 or more errors, as a function of the fail probability of a memory cell as determined by the EWS phase during fabrication.
    • 基本冗余信息被非挥发地存储在存储器阵列的可寻址区域的保留区域中,并且在存储器件的每次上电时复制到其中的易失性存储器。 在存储器阵列的这种保留区域中,不可预测的,不可避免的存在故障阵列元件会破坏在制造过程的测试晶片(EWS)阶段期间建立的基本冗余信息。 这增加了废品的数量,降低了制造工艺的产量。 通过使用特定的纠错码通过ECC技术将阵列的保留区域中的基本冗余数据写入该问题来解决该问题。 可以在多数代码3,5,7,15等之中选择纠错码,或者对于1,2,3或更多个错误,可以选择Hamming代码作为存储器单元的故障概率的函数,如由 EWS相制造期间。
    • 39. 发明申请
    • NON-VOLATILE, ELECTRICALLY-PROGRAMMABLE MEMORY
    • 非易失性,电可编程存储器
    • US20080052458A1
    • 2008-02-28
    • US11844465
    • 2007-08-24
    • Rino MicheloniRoberto Ravasio
    • Rino MicheloniRoberto Ravasio
    • G06F12/00
    • G11C11/5628G11C16/0483G11C16/3418G11C2211/5641
    • A solid-state mass storage device is provided. The solid-state mass storage device defines a storage area adapted to store data; the storage area is adapted to be exploited for storing data with a first storage density at a first data transfer speed. The storage area includes at least a first storage area portion and a second storage area portion. The solid-state mass storage device further includes accessing logic adapted to exploit the first storage area portion for storing data with a second storage density at a second data transfer speed, and adapted to exploit the second storage area portion for storing data with a third storage density and a third data transfer speed. The second storage density is lower than the third storage density, which is in turn lower than or equal to the first storage density; the second data transfer speed is higher than the third data transfer speed, which is in turn higher than or equal to the first data transfer speed.
    • 提供固态大容量存储装置。 固态大容量存储装置定义适于存储数据的存储区域; 存储区域适于被利用以以第一数据传送速度存储具有第一存储密度的数据。 存储区域至少包括第一存储区域部分和第二存储区域部分。 固体大容量存储装置还包括访问逻辑,其适于利用第一存储区域部分以第二数据传输速度存储具有第二存储密度的数据,并且适于利用第二存储区域部分来存储具有第三存储器的数据 密度和第三数据传输速度。 第二储存密度低于第三储存密度,其又低于或等于第一储存密度; 第二数据传送速度高于第三数据传送速度,其又高于或等于第一数据传送速度。
    • 40. 发明申请
    • METHOD FOR COMPACTING THE ERASED THRESHOLD VOLTAGE DISTRIBUTION OF FLASH MEMORY DEVICES DURING WRITING OPERATIONS
    • 写入操作期间闪存存储器件的擦除阈值电压分配方法
    • US20080049521A1
    • 2008-02-28
    • US11844480
    • 2007-08-24
    • Rino MicheloniLuca CrippaRoberto RavasioFederico Pio
    • Rino MicheloniLuca CrippaRoberto RavasioFederico Pio
    • G11C16/04
    • G11C16/344
    • A method for operating a flash memory device. The memory device includes a matrix of memory cells each one having a programmable threshold voltage defining a value stored in the memory cell. The method includes the steps of erasing a block of memory cells, and compacting the threshold voltages of the memory cells of the block within a predefined compacting range, wherein the step of compacting includes: selecting at least one first memory cell of the block for writing a target value; restoring the threshold voltage of a subset of the memory cells of the block to the compacting range, the subset including the at least one first memory cell and/or at least one second memory cell of the block being adjacent to the at least one first memory cell; and at least partially writing the target value into the at least one first memory cell.
    • 一种用于操作闪存设备的方法。 存储器件包括存储器单元矩阵,每个存储器单元具有限定存储在存储器单元中的值的可编程阈值电压。 该方法包括以下步骤:擦除存储器单元块,以及在预定的压缩范围内压缩块的存储单元的阈值电压,其中压缩步骤包括:选择块写入的至少一个第一存储单元 目标值 将块的存储器单元的子集的阈值电压恢复到压缩范围,该子集包括与至少一个第一存储器相邻的块的至少一个第一存储器单元和/或至少一个第二存储器单元 细胞; 并且至少部分地将目标值写入至少一个第一存储单元。