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    • 5. 发明授权
    • Low bitline capacitance structure and method of making same
    • 低位线电容结构及其制作方法
    • US06426247B1
    • 2002-07-30
    • US09764824
    • 2001-01-17
    • Ramachandra DivakaruniJeffrey P. GambinoJack A. MandelmanRajesh Rengarajan
    • Ramachandra DivakaruniJeffrey P. GambinoJack A. MandelmanRajesh Rengarajan
    • H01L21338
    • H01L27/10888H01L23/485H01L27/10861H01L27/10885H01L2924/0002H01L2924/00
    • A method for forming a memory device having low bitline capacitance, comprising: providing a gate conductor stack structure on a silicon substrate, said gate stack structure having a gate oxide layer, a polysilicon layer, a silicide layer, and a top dielectric nitride layer; oxidizing sidewalls of said gate oxide stack; forming sidewall spacers on the sidewalls of said gate conductor stack, said sidewall spacers comprising a thin layer of nitride having a thickness ranging from about 50 to about 250 angstroms; overlaying the gate structure with a thin nitride liner having a thickness ranging from about 25 to about 150 angstroms; depositing an insulative oxide layer over the gate structure; polishing the insulative oxide layer down to the level of the nitride liner of the gate structure; patterning and etching the insulative oxide layer to expose said nitride liner; forming second sidewall spacers over said first sidewall spacers, said second sidewall spacers comprising an oxide layer having a thickness ranging from about 100 to about 400 angstroms; and, depositing and planarizing a layer of polysilicon covering said gate structure and the sidewall spacers.
    • 一种用于形成具有低位线电容的存储器件的方法,包括:在硅衬底上提供栅极导体堆叠结构,所述栅堆叠结构具有栅极氧化层,多晶硅层,硅化物层和顶部电介质氮化物层; 氧化所述栅极氧化层的侧壁; 在所述栅极导体堆叠的侧壁上形成侧壁间隔物,所述侧壁间隔物包括厚度范围为约50至约250埃的薄氮化物层; 用具有约25至约150埃的厚度的薄氮化物衬垫覆盖栅极结构; 在栅极结构上沉积绝缘氧化物层; 将绝缘氧化物层抛光到栅极结构的氮化物衬垫的水平面; 图案化和蚀刻绝缘氧化物层以暴露所述氮化物衬垫; 在所述第一侧壁间隔物上形成第二侧壁间隔物,所述第二侧壁间隔物包括厚度范围为约100至约400埃的氧化物层; 并且沉积和平坦化覆盖所述栅极结构和侧壁间隔物的多晶硅层。
    • 8. 发明授权
    • Structure and method for dual gate oxidation for CMOS technology
    • 用于CMOS技术的双栅极氧化的结构和方法
    • US06674134B2
    • 2004-01-06
    • US09173430
    • 1998-10-15
    • Wayne S. BerryJeffrey P. GambinoJack A. MandelmanWilliam R. Tonti
    • Wayne S. BerryJeffrey P. GambinoJack A. MandelmanWilliam R. Tonti
    • H01L2976
    • H01L21/823481H01L21/76224H01L21/823462
    • The present invention provides an integrated circuit which comprises a substrate having a plurality of device regions formed therein, said plurality of device regions being electrically isolated from each other by shallow trench isolation (STI) regions and said plurality of device regions each having opposing edges abutting its corresponding STI region; selected ones of said devices regions having a preselected first device width such that an oxide layer formed thereon includes substantially thicker perimeter regions, along said opposing edges, compared to a thinner central region that does not abut its corresponding STI region; and selected other ones of the device regions having a preselected device width substantially narrower in width than the first device width such that an oxide layer formed thereon includes perimeter regions, along opposing edges, that abut each other over its central region thereby preventing formation of a corresponding thinner central region.
    • 本发明提供一种集成电路,其包括其中形成有多个器件区的衬底,所述多个器件区通过浅沟槽隔离(STI)区域彼此电隔离,并且所述多个器件区域各自具有相对的边缘邻接 其对应的STI区域; 所选择的所述器件区域具有预先选择的第一器件宽度,使得形成在其上的氧化物层与不相邻其对应的STI区的较薄的中心区域相比,沿着所述相对的边缘包括基本上较厚的周边区域; 以及选定的其它器件区域具有基本上比第一器件宽度窄的宽度的预选器件宽度,使得形成在其上的氧化物层包括沿相对边缘的周边区域,该周边区域在其中心区域上彼此邻接,从而防止形成 相应较薄的中心区域。