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    • 4. 发明授权
    • Methods for forming nitrogen-rich regions in a floating gate and
interpoly dielectric layer in a non-volatile semiconductor memory device
    • 在非易失性半导体存储器件中的浮栅和互聚电介质层中形成富氮区的方法
    • US6001713A
    • 1999-12-14
    • US154074
    • 1998-09-16
    • Mark T. RamsbeyVei-Han ChanSameer HaddadChi ChangYu SunRaymond Yu
    • Mark T. RamsbeyVei-Han ChanSameer HaddadChi ChangYu SunRaymond Yu
    • H01L21/28H01L21/265
    • H01L21/28273
    • Methods are provided for significantly reducing electron trapping in semiconductor devices having a floating gate and an overlying dielectric layer. The methods form a nitrogen-rich region within the floating gate near the interface to an overlying dielectric layer. The methods include selectively introducing nitrogen into the floating gate prior to forming the overlying dielectric layer. This forms an initial nitrogen concentration profile within the floating gate. An initial portion of the overlying dielectric layer is then formed of a high temperature oxide (HTO). The temperature within the floating gate is purposely raised to an adequately high temperature to cause the initial nitrogen concentration profile to change due to the migration of the majority of the nitrogen towards the interface with the overlying dielectric layer and an interface with an underlying layer. Consequently, the floating gate is left with a first nitrogen-rich region near the interface to the overlying dielectric layer and a second nitrogen-rich region near the interface to the underlying layer. The first nitrogen-rich region has been found to reduce electron trapping within the floating gate, which could lead to false programming of the floating gate. Unlike a conventional thermally grown oxide film, the high temperature oxide film within the interpoly dielectric layer advantageously prevents the surface of the floating gate from becoming too granular. As such, the resulting interpoly dielectric layer, which typically includes several films, can be formed more evenly.
    • 提供了用于显着减少具有浮置栅极和上覆电介质层的半导体器件中的电子俘获的方法。 该方法在与上覆电介质层的界面附近的浮栅内形成富氮区。 所述方法包括在形成上覆电介质层之前将氮气选择性地引入浮栅。 这在浮动栅极内形成初始氮浓度分布。 然后由上覆电介质层的初始部分由高温氧化物(HTO)形成。 浮置栅极内的温度有意地升高到足够高的温度,以使得初始氮浓度分布由于大部分氮向与上覆介质层的界面的迁移以及与下层的界面而改变。 因此,浮置栅极在与上覆电介质层的界面附近的第一富氮区域和与下层的界面附近的第二富氮区域留下。 已经发现第一个富氮区域减少了浮动栅极内的电子俘获,这可能导致浮动栅极的错误编程。 与传统的热生长氧化膜不同,多聚电介质层内的高温氧化膜有利地防止浮栅的表面变得太细。 因此,可以更均匀地形成通常包括几个膜的所得到的互间介电层。
    • 6. 发明授权
    • Ramp source hot-hole programming for trap based non-volatile memory devices
    • 用于基于陷阱的非易失性存储器设备的斜坡源热孔编程
    • US06934190B1
    • 2005-08-23
    • US10863933
    • 2004-06-09
    • Zengtao LiuZhizheng LiuYi HeSameer HaddadMark Randolph
    • Zengtao LiuZhizheng LiuYi HeSameer HaddadMark Randolph
    • G11C16/04G11C16/10G11C16/34
    • G11C16/10G11C16/3454
    • Methods of operating dual bit memory devices including programming with a range of values are provided. The present invention employs a range of ramp source program pulses to iteratively perform a program operation that employs hot hole injection. The range is related to channel lengths of individual dual bit memory cells within the memory device. To program a bit of a particular dual bit memory cell, a negative gate program voltage is applied to its gate, a positive drain voltage is applied to its acting drain, and its substrate is connected to ground. Additionally, a ramp source voltage of the range of ramp source program pulses is concurrently applied to an acting source of the dual bit memory cell. A verification operation is then performed and the programming is repeated with a decremented ramp source voltage on verification failure.
    • 提供了包括具有一定范围值的编程的双位存储器件的操作方法。 本发明采用一系列斜坡源程序脉冲来迭代地执行采用热空穴注入的程序操作。 该范围与存储器件内的各个双位存储单元的通道长度有关。 为了编程一个特定的双位存储单元,负栅极编程电压被施加到其栅极,正的漏极电压被施加到其作用漏极,并且其衬底连接到地。 此外,斜坡源程序脉冲范围的斜坡源电压同时施加到双位存储单元的作用源。 然后执行验证操作,并且在验证失败时以递减的斜坡源电压重复编程。
    • 7. 发明授权
    • Method of programming, erasing and repairing a memory device
    • 编程,擦除和修复存储设备的方法
    • US08482959B2
    • 2013-07-09
    • US13324759
    • 2011-12-13
    • Swaroop KazaSameer Haddad
    • Swaroop KazaSameer Haddad
    • G11C11/00G11C11/36
    • G11C11/5685G11C13/0007G11C13/004G11C13/0069G11C13/0097G11C2013/0071G11C2213/15G11C2213/79
    • A method of repairing a memory device is provided. If an erase process is unsuccessful, a repair process is performed. A programmed state of the memory device is determined, A subsequent erase process dependent on the programmed state is performed. Also, a method of programming and erasing a memory device is provided. The memory device includes first and second electrodes and a switching layer therebetween. A first on-state resistance characteristic of the memory device is provided in programming the memory device by application of a first voltage to the gate of a transistor in series with the memory device. Other on-state resistance characteristics of the memory device, different from the first on-state resistance characteristic, may be provided by application of other voltages, different from the first voltage, to the gate of the transistor.
    • 提供了修复存储器件的方法。 如果擦除过程不成功,则执行修复过程。 确定存储器件的编程状态。执行取决于编程状态的后续擦除过程。 另外,提供了编程和擦除存储器件的方法。 存储器件包括第一和第二电极以及它们之间的开关层。 提供存储器件的第一导通电阻特性,通过将第一电压施加到与存储器件串联的晶体管的栅极来对存储器件进行编程。 可以通过将不同于第一电压的其他电压施加到晶体管的栅极来提供不同于第一导通电阻特性的存储器件的其他导通电阻特性。