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    • 5. 发明申请
    • A method of forming semiconductor structures
    • 一种形成半导体结构的方法
    • US20060234469A1
    • 2006-10-19
    • US11409134
    • 2006-04-21
    • David DickersonRichard LaneCharles DennisonKunal ParekhMark FischerJohn Zahurak
    • David DickersonRichard LaneCharles DennisonKunal ParekhMark FischerJohn Zahurak
    • H01L21/76
    • H01L21/76232H01L21/0332H01L21/76235
    • In one aspect, the invention includes an isolation region forming method comprising: a) forming an oxide layer over a substrate; b) forming a nitride layer over the oxide layer, the nitride layer and oxide layer having a pattern of openings extending therethrough to expose portions of the underlying substrate; c) etching the exposed portions of the underlying substrate to form openings extending into the substrate; d) after etching the exposed portions of the underlying substrate, removing portions of the nitride layer while leaving some of the nitride layer remaining over the substrate; and e) after removing portions of the nitride layer, forming oxide within the openings in the substrate, the oxide within the openings forming at least portions of isolation regions. In another aspect, the invention includes an isolation region forming method comprising: a) forming a silicon nitride layer over a substrate; b) forming a masking layer over the silicon nitride layer; c) forming a pattern of openings extending through the masking layer to the silicon nitride layer; d) extending the openings through the silicon nitride layer to the underlying substrate, the silicon nitride layer having edge regions proximate the openings and having a central region between the edge regions; e) extending the openings into the underlying substrate; f) after extending the openings into the underlying substrate, reducing a thickness of the silicon nitride layer at the edge regions to thin the edge regions relative to the central region; and g) forming oxide within the openings.
    • 一方面,本发明包括一种隔离区形成方法,包括:a)在衬底上形成氧化物层; b)在所述氧化物层上形成氮化物层,所述氮化物层和氧化物层具有延伸穿过其中的开口图案以暴露所述下面的衬底的部分; c)蚀刻下面的衬底的暴露部分以形成延伸到衬底中的开口; d)在蚀刻下面的衬底的暴露部分之后,去除氮化物层的部分,同时留下一些保留在衬底上的氮化物层; 以及e)在去除所述氮化物层的部分之后,在所述衬底的所述开口内形成氧化物,所述开口内的氧化物形成至少部分隔离区域。 另一方面,本发明包括一种隔离区形成方法,包括:a)在衬底上形成氮化硅层; b)在氮化硅层上形成掩模层; c)形成延伸穿过掩模层的开口图案到氮化硅层; d)将开口穿过氮化硅层延伸到下面的衬底,氮化硅层具有靠近开口的边缘区域,并且在边缘区域之间具有中心区域; e)将开口延伸到下面的基底中; f)在将开口延伸到下面的基底之后,减小边缘区域处的氮化硅层的厚度,以使边缘区域相对于中心区域变薄; 和g)在开口内形成氧化物。
    • 10. 发明授权
    • Array of bit line over capacitor array of memory cells
    • 存储单元电容阵列上的位线阵列
    • US5705838A
    • 1998-01-06
    • US692748
    • 1996-08-06
    • Mark JostCharles Dennison
    • Mark JostCharles Dennison
    • H01L21/02H01L21/768H01L21/8242H01L27/108H01L29/41
    • H01L27/10852H01L21/768H01L21/76877H01L27/10808H01L28/40H01L28/60H01L28/82H01L28/84H01L28/86H01L28/90Y10S148/05
    • A semiconductor memory device includes, a) a semiconductor substrate; b) a field effect transistor gate positioned outwardly of the semiconductor substrate; c) opposing active areas formed within the semiconductor substrate on opposing sides of the gate; d) a capacitor electrically connected with one of the active areas; the capacitor comprising an inner storage node, a capacitor dielectric layer, and an outer cell node; the inner storage node electrically connecting with the one active area, the inner storage node having an upper surface at an elevation; e) a bit line; f) a dielectric insulating layer positioned intermediate the bit line and the other active area; and g) an electrically conductive bit line plug extending through the insulating layer to contact with the other active area and electrically interconnect the bit line with the other active area, the bit line plug being homogeneous in composition between the other active area and the elevation of the inner storage node upper surface. A method of producing such a construction is also disclosed.
    • 半导体存储器件包括:a)半导体衬底; b)位于半导体衬底外侧的场效应晶体管栅极; c)在栅极的相对侧上形成在半导体衬底内的相对的有源区; d)与有源区域之一电连接的电容器; 所述电容器包括内部存储节点,电容器介电层和外部单元节点; 所述内部存储节点与所述一个活动区域电连接,所述内部存储节点具有在高度处的上表面; e)有点线 f)位于位线和另一个有效区域之间的介电绝缘层; 并且g)导电位线插头,其延伸穿过所述绝缘层以与所述另一有源区域接触并且将所述位线与所述另一个有源区域电互连,所述位线插头在所述另一个有效区域和 内部存储节点上表面。 还公开了一种制造这种结构的方法。