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    • 3. 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。
    • 7. 发明授权
    • Semiconductor device and method of operating it
    • 半导体器件及其操作方法
    • US06295229B1
    • 2001-09-25
    • US09351742
    • 1999-07-08
    • Kuo-Tung ChangErwin J. PrinzCraig T. Swift
    • Kuo-Tung ChangErwin J. PrinzCraig T. Swift
    • G11C1604
    • G11C16/0433G11C16/12
    • A semiconductor device (70) includes a memory cell having a select transistor (67) and a storage transistor (65) having a relatively uniform tunnel dielectric thickness under both the floating gate (651) of the storage transistor and the select gate (671) of the select transistor (67). The select transistor (67) is adjacent to the drain region (68) for the memory cell to nearly eliminate a drain disturb problem. During programming, the control gate (652) is at a negative potential, and the drain region (68) is at a positive potential. The drain potential is sufficiently low to not degrade the tunnel dielectric layer (42) of the select transistor (67). During erase, a positive potential is applied to the control gate (652). The relatively uniform tunnel dielectric layer (42) thickness of the select transistor (67) allows for a faster operating device by increasing the read current of the memory device.
    • 半导体器件(70)包括具有在存储晶体管的浮动栅极(651)和选择栅极(671)两者下具有相对均匀的隧道电介质厚度的选择晶体管(67)和存储晶体管(65)的存储单元, 的选择晶体管(67)。 选择晶体管(67)与用于存储单元的漏极区域(68)相邻,几乎消除了漏极干扰问题。 在编程期间,控制栅极(652)处于负电位,漏区(68)处于正电位。 漏极电位足够低以不降低选择晶体管(67)的隧道介电层(42)。 在擦除期间,向控制栅极施加正电位(652)。 选择晶体管(67)的相对均匀的隧道介电层(42)的厚度通过增加存储器件的读取电流而允许更快的操作器件。
    • 9. 发明申请
    • METHOD FOR PROCESS INTEGRATION OF NON-VOLATILE MEMORY CELL TRANSISTORS WITH TRANSISTORS OF ANOTHER TYPE
    • 非易失性存储单元晶体管与其他类型晶体管的集成方法
    • US20080261367A1
    • 2008-10-23
    • US11738003
    • 2007-04-20
    • Erwin J. PrinzMehul D. Shroff
    • Erwin J. PrinzMehul D. Shroff
    • H01L21/8232
    • H01L27/105H01L27/11526H01L27/11546H01L29/7833
    • A method for making a semiconductor device having non-volatile memory cell transistors and transistors of another type is provided. In the method, a substrate is provided having an NVM region, a high voltage (HV) region, and a low voltage (LV) region. The method includes forming a gate dielectric layer on the HV and LV regions. A tunnel oxide layer is formed over the substrate in the NVM region and the gate dielectric in the HV and LV regions. A first polysilicon layer is formed over the tunnel dielectric layer and gate dielectric layer. The first polysilicon layer is patterned to form NVM floating gates. An ONO layer is formed over the first polysilicon layer. A single etch removal step is used to form gates for the HV transistors from the first polysilicon layer while removing the first polysilicon layer from the LV region.
    • 提供一种制造具有非易失性存储单元晶体管和另一种晶体管的半导体器件的方法。 在该方法中,提供具有NVM区域,高电压(HV)区域和低电压(LV))区域的衬底。 该方法包括在HV和LV区域上形成栅极电介质层。 隧道氧化物层形成在NVM区域中的衬底上,HV和LV区域中的栅极电介质。 第一多晶硅层形成在隧道介电层和栅介质层上。 图案化第一多晶硅层以形成NVM浮动栅极。 在第一多晶硅层上形成ONO层。 单个蚀刻去除步骤用于从第一多晶硅层形成用于HV晶体管的栅极,同时从LV区域移除第一多晶硅层。