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    • 53. 发明授权
    • Spacer for a split gate flash memory cell and a memory cell employing the same
    • 分离栅闪存单元的间隔器和采用其的存储单元
    • US07202130B2
    • 2007-04-10
    • US10775290
    • 2004-02-10
    • Yuan-Hung LiuChih-Ta WuYeur-Luen TuChi-Hsin LoChia-Shiung Tsai
    • Yuan-Hung LiuChih-Ta WuYeur-Luen TuChi-Hsin LoChia-Shiung Tsai
    • H01L21/336H01L29/788
    • H01L27/11568H01L27/115H01L27/11521H01L29/42324
    • A spacer, a split gate flash memory cell, and related method of forming the same. In one aspect, a composite spacer includes a first spacer insulating layer having a first deposition distribution that varies as a function of a location on a substrate. The composite spacer also includes a second spacer insulating layer having a second deposition distribution that varies in substantial opposition to the first deposition distribution. In another aspect, a composite spacer includes a first spacer insulating layer having a substantially uniform deposition distribution across a surface thereof. The composite spacer also includes a second spacer insulating layer having a varying deposition distribution with a thinner composition in selected regions of the memory cell. In another aspect, a coupling spacer provides for a conductive layer that extends between a floating gate and a substrate insulating layer adjacent a source recessed into the substrate of the memory cell.
    • 间隔物,分裂栅极闪存单元及其相关方法。 在一个方面,一种复合间隔物包括具有第一沉积分布的第一间隔绝缘层,其随着基底上的位置而变化。 复合间隔物还包括具有与第一沉积分布基本相反的第二沉积分布的第二间隔绝缘层。 在另一方面,复合间隔物包括在其表面上具有基本均匀的沉积分布的第一间隔绝缘层。 复合间隔物还包括具有在存储单元的选定区域中具有较薄组成的不同沉积分布的第二间隔绝缘层。 在另一方面,耦合间隔物提供导电层,该导电层在浮置栅极和与凹入到存储器单元的衬底中的源极相邻的衬底绝缘层之间延伸。
    • 54. 发明申请
    • SPLIT GATE FLASH DEVICES
    • 分闸门闪存器件
    • US20070069328A1
    • 2007-03-29
    • US11555712
    • 2006-11-02
    • Shih-Chang LiuChi-Hsin LoGwo-Yuh ShiauChia-Shiung Tsai
    • Shih-Chang LiuChi-Hsin LoGwo-Yuh ShiauChia-Shiung Tsai
    • H01L29/00
    • H01L21/76224H01L21/823481H01L27/115H01L27/11521
    • A method for forming a split gate flash device is provided. In one embodiment, a semiconductor substrate with a dielectric layer formed thereover is provided. A conductor layer is formed overlying the dielectric layer. A masking layer is deposited overlying the conductor layer. A light sensitive layer is formed overlying the masking layer. The light sensitive layer is patterned and etched to form a pattern of openings therein. The masking layer and the conductor layer are etched according to the pattern of openings in the light sensitive layer. The conductor layer is etched at the outer surface area between the conductor layer and the dielectric layer to form undercuts. The dielectric layer is etched to form a notch profile at the outer surface area between the conductor layer and the dielectric layer and portions of the substrate are etched to form a plurality of trenches. An isolation layer is filled over the plurality of trenches and the masking layer. The masking layer and portions of the conductor layer and isolation layer are etched away, wherein a portion of the isolation layer is preserved in the notch profile.
    • 提供了一种用于形成分离栅极闪光装置的方法。 在一个实施例中,提供了其上形成介电层的半导体衬底。 形成覆盖在电介质层上的导体层。 掩蔽层沉积在导体层上。 形成覆盖掩模层的光敏层。 对感光层进行图案化和蚀刻以在其中形成开口图案。 掩模层和导体层根据光敏层中的开口图案进行蚀刻。 在导体层和电介质层之间的外表面区域处蚀刻导体层以形成底切。 蚀刻电介质层以在导体层和电介质层之间的外表面区域形成切口轮廓,并且蚀刻衬底的部分以形成多个沟槽。 隔离层填充在多个沟槽和掩蔽层上。 掩模层和导体层和隔离层的部分被蚀刻掉,其中隔离层的一部分保留在凹口轮廓中。
    • 56. 发明申请
    • METHOD FOR PREVENTING TRENCHING IN FABRICATING SPLIT GATE FLASH DEVICES
    • 用于防止在制造分离栅格闪存器件中进行TRENCHING的方法
    • US20060275984A1
    • 2006-12-07
    • US11141902
    • 2005-06-01
    • Shih-Chang LiuChi-Hsin LoGwo-Yuh ShiauChia-Shiung Tsai
    • Shih-Chang LiuChi-Hsin LoGwo-Yuh ShiauChia-Shiung Tsai
    • H01L21/336H01L29/788
    • H01L21/76224H01L21/823481H01L27/115H01L27/11521
    • A method for forming a split gate flash device is provided. In one embodiment, a semiconductor substrate with a dielectric layer formed thereover is provided. A conductor layer is formed overlying the dielectric layer. A masking layer is deposited overlying the conductor layer. A light sensitive layer is formed overlying the masking layer. The light sensitive layer is patterned and etched to form a pattern of openings therein. The masking layer and the conductor layer are etched according to the pattern of openings in the light sensitive layer. The conductor layer is etched at the outer surface area between the conductor layer and the dielectric layer to form undercuts. The dielectric layer is etched to form a notch profile at the outer surface area between the conductor layer and the dielectric layer and portions of the substrate are etched to form a plurality of trenches. An isolation layer is filled over the plurality of trenches and the masking layer. The masking layer and portions of the conductor layer and isolation layer are etched away, wherein a portion of the isolation layer is preserved in the notch profile.
    • 提供了一种用于形成分离栅极闪光装置的方法。 在一个实施例中,提供了其上形成介电层的半导体衬底。 形成覆盖在电介质层上的导体层。 掩蔽层沉积在导体层上。 形成覆盖掩模层的光敏层。 对感光层进行图案化和蚀刻以在其中形成开口图案。 掩模层和导体层根据光敏层中的开口图案进行蚀刻。 在导体层和电介质层之间的外表面区域处蚀刻导体层以形成底切。 蚀刻电介质层以在导体层和电介质层之间的外表面区域形成切口轮廓,并且蚀刻衬底的部分以形成多个沟槽。 隔离层填充在多个沟槽和掩蔽层上。 掩模层和导体层和隔离层的部分被蚀刻掉,其中隔离层的一部分保留在凹口轮廓中。
    • 57. 发明申请
    • Novel process for erase improvement in a non-volatile memory device
    • 用于擦除非易失性存储器件中的擦除的新方法
    • US20060170029A1
    • 2006-08-03
    • US11045850
    • 2005-01-28
    • Shih-Chang LiuChi-Hsin LoShih-Chi FuChia-Ta HsiehWen-Ting ChuChia-Shiung Tsai
    • Shih-Chang LiuChi-Hsin LoShih-Chi FuChia-Ta HsiehWen-Ting ChuChia-Shiung Tsai
    • H01L29/788
    • H01L27/11521H01L21/28273H01L27/115
    • A method of making embedded non-volatile memory devices includes forming a first mask layer overlying a polycrystalline silicon layer in a cell region and a peripheral region on a semiconductor substrate wherein the first mask layer has a plurality of openings in the cell region. Portions of the polycrystalline silicon layer exposed in the plurality of openings can be oxidized to form a plurality of poly-oxide regions, and the first mask layer can then be removed. The polycrystalline silicon layer not covered by the plurality of poly-oxide regions can be etched to form a plurality of floating gates, wherein etching the polycrystalline silicon layer is accompanied by a sputtering. A dielectric layer can then be formed, as well as a second mask layer in both the cell region and the peripheral region. The second mask layer in the cell region is partially etched back after a photoresist layer is formed over the second mask layer in the peripheral region. The dielectric layer is partially etched to form multiple thicknesses of the dielectric layer. The second mask layer is removed and a plurality of control gates are formed partially overlying the plurality of floating gates in the cell region.
    • 一种制造嵌入式非易失性存储器件的方法包括形成覆盖单元区域中的多晶硅层的第一掩模层和半导体衬底上的外围区域,其中第一掩模层在单元区域中具有多个开口。 在多个开口中暴露的多晶硅层的一部分可以被氧化以形成多个多晶氧化物区域,然后可以去除第一掩模层。 可以蚀刻不被多个多晶氧化物区域覆盖的多晶硅层以形成多个浮栅,其中蚀刻多晶硅层伴随着溅射。 然后可以形成电介质层,以及在电池区域和周边区域中形成第二掩模层。 在周边区域中的第二掩模层上形成光致抗蚀剂层之后,单元区域中的第二掩模层被部分地回蚀。 电介质层被部分蚀刻以形成介电层的多个厚度。 去除第二掩模层,并且多个控制栅极部分地覆盖在单元区域中的多个浮动栅极上。