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    • 5. 发明申请
    • Semiconductor memory
    • 半导体存储器
    • US20060205148A1
    • 2006-09-14
    • US11078647
    • 2005-03-11
    • Joachim DeppeMathias KrauseChristoph KleintChristoph LudwigJens-Uwe SachseGunther Wein
    • Joachim DeppeMathias KrauseChristoph KleintChristoph LudwigJens-Uwe SachseGunther Wein
    • H01L21/336H01L21/3205H01L21/8238
    • H01L21/28282H01L29/4234H01L29/792
    • A non-volatile semiconductor memory (30) comprising a semiconductor substrate (1) and a plurality of memory cells (19) and methods for manufacturing such a memory is provided. Each memory cell (19) comprises a charge-trapping element (5), a gate stack (20), nitride spacers (10) and electrically insulating elements (21). The charge-trapping element (5) is arranged on the semiconductor substrate (1) and comprises a nitride layer (3) sandwiched between a bottom oxide layer (2) and a top oxide layer (4), the charge-trapping element (5) having two lateral sidewalls (24) opposed to one another. The gate stack (20) is arranged on top of the charge-trappinig element (5), the gate stack having two lateral sidewalls (25) opposing one another. The electrically insulating elements (21) are disposed at opposing sidewalls (24) of the charge-trapping element (5) and cover the sidewalls (24) of the charge-trapping element (5). The nitride spacers (10) cover the electrically insulating elements (21) and are arranged on opposing sidewalls (25) of the gate stack (20) and on the electrically insulating elements (21).
    • 提供了包括半导体衬底(1)和多个存储单元(19)的非易失性半导体存储器(30)和用于制造这种存储器的方法。 每个存储单元(19)包括电荷捕获元件(5),栅极堆叠(20),氮化物间隔物(10)和电绝缘元件(21)。 电荷捕获元件(5)设置在半导体衬底(1)上并且包括夹在底部氧化物层(2)和顶部氧化物层(4)之间的氮化物层(3),电荷俘获元件(5) )具有彼此相对的两个侧壁(24)。 栅极堆叠(20)布置在电荷捕获元件(5)的顶部上,栅极堆叠具有彼此相对的两个侧壁(25)。 电绝缘元件(21)设置在电荷捕获元件(5)的相对侧壁(24)处并覆盖电荷捕获元件(5)的侧壁(24)。 氮化物间隔物(10)覆盖电绝缘元件(21)并且布置在栅极堆叠(20)的相对侧壁(25)上以及电绝缘元件(21)上。