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    • 41. 发明授权
    • Neighbor effect cancellation in memory array architecture
    • 内存阵列架构中的邻居效应消除
    • US06937523B2
    • 2005-08-30
    • US10696728
    • 2003-10-27
    • Noam Eshel
    • Noam Eshel
    • G11C16/28G11C16/06
    • G11C16/28
    • Non-volatile memory (NVM) cells are sensed using a forced neighbor signal to eliminate improper readings generated by a neighbor effect. A selected NVM cell is sensed using a near-ground signal by applying a potential to a first terminal, coupling a second terminal to ground, and then decoupling the second terminal and comparing the resulting cell signal with a reference signal as both signals are developing (i.e., increasing from ground). A forced neighbor signal is applied to one more neighboring cells such that as the sensed cell signal develops (increases from ground), the forced neighbor signal develops at a similar rate, thereby maintaining a voltage across the neighboring cells close to zero and thus preventing leakage of the sensed cell signal through the neighbor cell(s). A dc sensing approach utilizes a current source and grounded resistor to minimize leakage through the neighbor cell(s).
    • 使用强制相邻信号感测非易失性存储器(NVM)单元,以消除由相邻效应产生的不正确读取。 使用近地信号,通过向第一终端施加电位,将第二终端耦合到地,然后将第二终端解耦并在两个信号正在发展时将所得到的信号信号与参考信号进行比较,来使用近地信号来感测选定的NVM单元 即从地面增加)。 强制相邻信号被施加到一个更邻近的小区,使得随着感测到的小区信号的发展(从地面增加),强制邻居信号以相似的速率发展,从而保持邻近小区的电压接近零,从而防止泄漏 的感测单元信号通过相邻单元。 直流感测方法利用电流源和接地电阻来最小化通过相邻电池的泄漏。
    • 42. 发明申请
    • Efficient test structure for non-volatile memory and other semiconductor integrated circuits
    • 非易失性存储器和其他半导体集成电路的高效测试结构
    • US20030074611A1
    • 2003-04-17
    • US09975064
    • 2001-10-10
    • Tower Semiconductor Ltd.
    • Ishai Nachumovsky
    • G11C029/00
    • G11C29/006G11C29/48
    • A test system includes a test wafer having non-volatile memory dies and an exposed set of pads. A probe wafer includes test circuitry, a first set of pads exposed at a first surface, a second set of pads exposed at a second surface (opposite the first surface), and an interconnect structure. The interconnect structure includes traces that extend through the probe card or around the edges of the probe card, between the first and second surfaces. A prober aligns the test wafer with the probe wafer, such that the pads of the test wafer contact the first set of pads of the probe wafer. The prober further contacts the second set of pads of the probe wafer, and provides connections between these pads and a tester. The probe wafer is fabricated using semiconductor processing techniques, so that precise alignment exists between the test wafer and the probe wafer.
    • 测试系统包括具有非易失性存储器管芯和暴露的焊盘的测试晶片。 探针晶片包括测试电路,在第一表面暴露的第一组焊盘,在第二表面(与第一表面相对)暴露的第二组焊盘,以及互连结构。 互连结构包括在第一和第二表面之间延伸穿过探针卡或探针卡的边缘周围的迹线。 探测器将测试晶片与探针晶片对准,使得测试晶片的焊盘接触探针晶片的第一组焊盘。 探测器进一步接触探针晶片的第二组焊盘,并提供这些焊盘和测试仪之间的连接。 使用半导体处理技术制造探针晶片,使得在测试晶片和探针晶片之间精确对准。
    • 45. 发明授权
    • Program/erase endurance of EEPROM memory cells
    • EEPROM存储单元的编程/擦除耐久性
    • US6157570A
    • 2000-12-05
    • US243973
    • 1999-02-04
    • Ishai Nachumovsky
    • Ishai Nachumovsky
    • G11C11/56G11C16/04G11C16/34H01L27/115
    • G11C16/3495G11C11/5671G11C16/0475G11C16/349H01L27/115
    • A circuit and method increases the endurance of memory cells in a memory array by decreasing the number of times a memory cell is programmed or erased. A bit-wise program/erase controller coupled to the memory array modifies the erasing and programming of multi-bit data words by erasing only those memory cells which must be erased and programming only those memory cells which must be programmed. Specifically, the bit-wise program/erase controller compares a new data word, which will be written into the memory array at a write address, with the current data word at the write address. The memory cells at the write address are categorized into a first subset and a second subset. The first subset of memory cells are currently in a programmed state but must be erased because the corresponding bit of the new data word is at an erased logic level. The second subset of memory cells are currently in an erased state but must be programmed because the corresponding bit of the new data word is at a programmed logic level. Bit-wise program/erase controller erases only the first subset of memory cells and programs only the second subset of memory cells. Thus, over multiple writes into the memory array, the number times each memory cell is erased or programmed is reduced resulting in greater endurance of the memory cells.
    • 电路和方法通过减少存储器单元被编程或擦除的次数来增加存储器阵列中存储单元的耐久性。 耦合到存储器阵列的逐位程序/擦除控制器通过仅擦除必须擦除的那些存储器单元并且仅编程那些必须被编程的存储器单元来修改多位数据字的擦除和编程。 具体来说,逐位编程/擦除控制器将在写入地址处将写入存储器阵列的新数据字与写入地址处的当前数据字进行比较。 写地址处的存储单元被分类为第一子集和第二子集。 存储器单元的第一子集当前处于编程状态,但必须被擦除,因为新数据字的相应位处于擦除的逻辑电平。 存储器单元的第二子集当前处于擦除状态,但必须被编程,因为新数据字的相应位处于编程逻辑电平。 逐位程序/擦除控制器仅擦除存储器单元的第一个子集,仅擦除存储器单元的第二个子集。 因此,在对存储器阵列的多次写入中,每个存储单元被擦除或编程的次数减少,导致存储器单元的更大的耐久性。