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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。
    • 10. 发明授权
    • Method of forming bitline diffusion halo under gate conductor ledge
    • 在栅极导体突起处形成位线扩散晕的方法
    • US06274441B1
    • 2001-08-14
    • US09560073
    • 2000-04-27
    • Jack A. MandelmanRamachandra DivakaruniWilliam R. Tonti
    • Jack A. MandelmanRamachandra DivakaruniWilliam R. Tonti
    • H01L2170
    • H01L29/1045H01L21/266H01L27/10861H01L27/10873H01L27/10888H01L29/1083H01L29/6653H01L29/66659
    • A method for fabricating a MOSFET device including a halo implant comprising providing a semiconductor substrate, a gate insulator layer, a conductor layer, an overlying silicide layer, and an insulating cap; patterning and etching the silicide layer and the insulating cap; providing insulating spacers along sides of said silicide layer and insulating cap; implanting node and bitline N+ diffusion regions; patterning a photoresist layer to protect the node diffusion region and supporting PFET source and drain regions and expose the bitline diffusion region and NFET source and drain regions; etching exposed spacer material from the side of said silicide layer and insulating cap; implanting a P-type impurity halo implant into the exposed bitline diffusion region and supporting NFET source and drain regions; and stripping the photoresist layer and providing an insulating spacer along the exposed side of said silicide layer and insulating cap.
    • 一种制造包括卤素注入的MOSFET器件的方法,包括提供半导体衬底,栅极绝缘体层,导体层,上覆硅化物层和绝缘帽; 图案化和蚀刻硅化物层和绝缘帽; 在所述硅化物层和绝缘盖的侧面提供绝缘垫片; 植入节点和位线N +扩散区域; 图案化光致抗蚀剂层以保护节点扩散区域并支持PFET源极和漏极区域并暴露位线扩散区域和NFET源极和漏极区域; 从所述硅化物层和绝缘盖的侧面蚀刻暴露的间隔物材料; 将P型杂质卤素注入植入暴露的位线扩散区并支持NFET源极和漏极区; 并剥离光致抗蚀剂层,并沿着所述硅化物层和绝缘帽的暴露侧提供绝缘间隔物。