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    • 23. 发明授权
    • Planarized selective tungsten metallization system
    • 平面选择性钨金属化系统
    • US5055423A
    • 1991-10-08
    • US383304
    • 1989-07-18
    • Gregory C. SmithThomas D. Bonifield
    • Gregory C. SmithThomas D. Bonifield
    • H01L21/3205H01L21/768
    • H01L21/32051H01L21/76801H01L21/76816H01L21/76829H01L21/76879H01L21/76807
    • In an improved selection tungsten metallization system, a plurality of orifices (20) are cut into a first level dielectric layer (18). A nucleation layer (52), preferably Ti-W alloy, is then formed in each orifice (20) and on the outer surface of the first dielectric layer (18) in a second-level metallization pattern. A second dielectric layer (30) is deposited over the first dielectric layer (18) and the nucleation layer (52), and a reverse second level metallization pattern is used to etch slots (58) back down to the nucleation layers (52) and into orifices (20). Thereafter, tungsten is deposited by selective CVD to fill the first level orifices (20) and the second level slots (58) until the upper surfaces (62) of the tungsten conductors (60) are substantially coplanar with the upper surface (38) of the second dielectric layer (30).
    • 在改进的选择钨金属化系统中,将多个孔(20)切割成第一级介电层(18)。 然后在每个孔口(20)中以第二级金属化图案形成第一介电层(18)的外表面上的成核层(52),优选Ti-W合金。 沉积在第一介电层(18)和成核层(52)上的第二介电层(30),并且使用反向第二级金属化图案来蚀刻回到成核层(52)的槽(58)和 进入孔(20)。 此后,通过选择性CVD沉积钨以填充第一级孔(20)和第二级槽(58),直到钨导体(60)的上表面(62)与上表面(38)的上表面(38)基本共面 第二电介质层(30)。
    • 26. 发明授权
    • Scribe seal connection
    • 划痕密封连接
    • US07968974B2
    • 2011-06-28
    • US12201394
    • 2008-08-29
    • Scott R. SummerfeltThomas D. Bonifield
    • Scott R. SummerfeltThomas D. Bonifield
    • H01L23/02
    • H01L23/585H01L23/562H01L23/564H01L2924/0002H01L2924/00
    • A feedthrough in an IC scribe seal is disclosed. The feedthrough is structured to maintain isolation of components in the IC from mechanical damage and chemical impurities introduced during fabrication and assembly operations. A conductive structure penetrates the scribe seal, possibly in more than one location, connecting an interior region to an exterior region. A feedthrough vertical seal surrounds the conductive element in the IC and connects to the scribe seal. A horizontal diffusion barrier connects to the scribe seal and the feedthrough vertical seal. The feedthrough vertical seal, the horizontal diffusion barrier and the IC substrate form a continuous barrier to chemical impurities around the conductive element in the interior region. The conductive structure includes any combination of a doped region in an active area, an MOS transistor gate layer, and one or more interconnect metal layers. The feedthrough is compatible with aluminum and copper interconnect metallization.
    • 公开了IC划片印章中的馈通。 馈通的结构是保持IC中组件的隔离,防止在制造和组装操作过程中引入的机械损伤和化学杂质。 导电结构可能在不止一个位置上穿过划线密封,将内部区域连接到外部区域。 馈通垂直密封件围绕IC中的导电元件并连接到划线密封件。 水平扩散屏障连接到划线密封和馈通垂直密封。 馈通垂直密封件,水平扩散阻挡层和IC基板在内部区域内对导电元件周围的化学杂质形成连续的屏障。 导电结构包括有源区域中的掺杂区域,MOS晶体管栅极层和一个或多个互连金属层的任何组合。 馈通与铝和铜互连金属化兼容。
    • 27. 发明授权
    • Metallization process for a semiconductor device
    • 半导体器件的金属化工艺
    • US5444018A
    • 1995-08-22
    • US135863
    • 1993-10-13
    • Dennis J. YostThomas D. BonifieldRoc Blumenthal
    • Dennis J. YostThomas D. BonifieldRoc Blumenthal
    • H01L21/28H01L21/285H01L21/768H01L23/522H01L21/441
    • H01L21/28512H01L21/76895H01L2924/0002
    • A contact for a semiconductor device has a via extending through a dielectric and collimated titanium in the via. Depositing titanium by collimation places sufficient metal into high aspect ratio contacts to make good electrical connection. The collimated titanium may be reacted in a nitrogen containing ambient to form a titanium silicide layer at the bottom of the contact and a titanium nitride layer over the titanium silicide layer. The titanium silicide layer provides good electrical contact to a device in a silicon semiconductor substrate and lowers contact resistance. Tungsten may be deposited over the colliminated titanium to form a conductor layer. The titanium nitride layer provides a sticking layer for the tungsten. The contact structure and the method are useful in high aspect ratio contacts present in VLSI multilevel interconnected devices such as dynamic random access memories.
    • 用于半导体器件的触点具有延伸穿过通孔中的电介质和准直钛的通孔。 通过准直沉积钛将足够的金属置入高纵横比触点,以实现良好的电连接。 准直的钛可以在含氮环境中反应以在接触的底部形成硅化钛层,并且在钛硅化物层上方形成氮化钛层。 硅化钛层与硅半导体衬底中的器件提供良好的电接触并降低接触电阻。 钨可以沉积在准直钛上以形成导体层。 氮化钛层为钨提供粘附层。 接触结构和方法对于存在于VLSI多级互连设备(例如动态随机存取存储器)中的高纵横比触点是有用的。