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    • 6. 发明授权
    • Program and erase in a thin film storage non-volatile memory
    • 在薄膜存储非易失性存储器中编程和擦除
    • US06791883B2
    • 2004-09-14
    • US10178658
    • 2002-06-24
    • Craig T. SwiftJane A. YaterAlexander B. HoeflerKo-Min ChangErwin J. PrinzBruce L. Morton
    • Craig T. SwiftJane A. YaterAlexander B. HoeflerKo-Min ChangErwin J. PrinzBruce L. Morton
    • G11C1600
    • G11C16/0466
    • A non-volatile memory having a thin film dielectric storage element is programmed by hot carrier injection (HCI) and erased by tunneling. The typical structure for the memory cells for this type of memory is silicon, oxide, nitride, oxide, and silicon (SONOS). The hot carrier injection provides relatively fast programming for SONOS, while the tunneling provides for erase that avoids the difficulties with the hot hole erase (HHE) type erase that generally accompanies hot carrier injection for programming. HHE is significantly more damaging to dielectrics leading to reliability issues. HHE also has a relatively narrow area of erasure that may not perfectly match the pattern for the HCI programming leaving an incomplete erasure. The tunnel erase effectively covers the entire area so there is no concern about incomplete erase. Although tunnel erase is slower than HHE, erase time is generally less critical in a system operation than is programming time.
    • 具有薄膜电介质存储元件的非易失性存储器通过热载流子注入(HCI)编程并通过隧道擦除。 这种存储器的存储单元的典型结构是硅,氧化物,氮化物,氧化物和硅(SONOS)。 热载波注入为SONOS提供相对快速的编程,而隧道提供擦除,避免了通常伴随热载流子注入进行编程的热孔擦除(HHE)类型擦除的困难。 HHE对电介质的破坏性更大,导致可靠性问题。 HHE还具有相对较窄的擦除区域,可能不完全匹配HCI编程的模式,从而导致不完整的擦除。 隧道擦除有效地覆盖整个区域,所以不用担心不完全擦除。 虽然隧道擦除比HHE慢,但擦除时间在系统操作中通常不如编程时间那么重要。
    • 8. 发明授权
    • Nonvolatile memory with enhanced carrier generation and method for
programming the same
    • 具有增强载波生成的非易失性存储器和用于编程的方法
    • US5258949A
    • 1993-11-02
    • US620813
    • 1990-12-03
    • Ko-Min ChangMing-Bing Chang
    • Ko-Min ChangMing-Bing Chang
    • G11C17/00G11C16/04G11C16/12H01L21/8246H01L21/8247H01L27/112H01L29/788H01L29/792G11C13/00
    • G11C16/12H01L29/7885
    • Programming speed of a nonvolatile memory is improved by enhancing carrier generation. In one form, a nonvolatile memory has a control gate which overlies a channel region in a substrate. A floating gate overlies a portion of the channel region and is positioned between the substrate and the control gate. A source and a drain are formed in the substrate, being displaced by the channel region. A first programming voltage is applied to the drain to create an electric field at a junction between the drain and channel region. Current is forced into the source and through the substrate in order to enhance carrier generation at the junction between the drain and channel region, thereby increasing an electric field at the junction. A second programming voltage, having a ramp shaped leading edge, is applied to the control gate to increase the electrical field and to program the memory to a predetermined logic state.
    • 通过增强载体生成来提高非易失性存储器的编程速度。 在一种形式中,非易失性存储器具有覆盖在衬底中的沟道区域的控制栅极。 浮动栅极覆盖沟道区的一部分并位于衬底和控制栅之间。 源极和漏极形成在衬底中,被沟道区域置换。 将第一编程电压施加到漏极,以在漏极和沟道区域之间的结处产生电场。 电流被迫进入源极并通过衬底,以便增强在漏极和沟道区域之间的结处的载流子产生,从而增加了结处的电场。 具有斜坡形状的前沿的第二编程电压被施加到控制栅极以增加电场并将存储器编程到预定的逻辑状态。