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    • 48. 发明授权
    • Phase change material memory device
    • 相变材料存储器件
    • US06586761B2
    • 2003-07-01
    • US09948830
    • 2001-09-07
    • Tyler A. Lowrey
    • Tyler A. Lowrey
    • H01L4700
    • H01L45/06H01L27/2463H01L45/124H01L45/1293H01L45/144H01L45/1691
    • A phase change material memory cell may be formed with singulated, cup-shaped phase change material. The interior of the cup-shaped phase change material may be filled with a thermal insulating material. As a result, heat losses upwardly through the phase change material may be reduced and adhesion problems between the phase change material and the rest of the device may likewise be reduced in some embodiments. In addition, a barrier layer may be provided between the upper electrode and the remainder of the device that may reduce species incorporation from the top electrode into the phase change material, in some embodiments. Chemical mechanical planarization may be utilized to define the phase change material reducing the effects of phase change material dry etching in some embodiments.
    • 相变材料存储单元可以形成为单切形的杯形相变材料。 杯状相变材料的内部可以填充绝热材料。 结果,在一些实施例中,相变材料向上的热损失可能会降低,同相材料与器件的其余部分之间的粘合问题同样可以减少。 此外,在一些实施例中,可以在上电极和器件的其余部分之间提供阻挡层,其可以减少从顶电极引入到相变材料中的物质。 在一些实施方案中,化学机械平面化可用于限定相变材料减少相变材料干蚀刻的影响。
    • 50. 发明授权
    • Method of fabricating conductive straps to interconnect contacts to corresponding digit lines by employing an angled sidewall implant and semiconductor devices fabricated thereby
    • 通过采用成角度的侧壁注入和由此制造的半导体器件制造导电带以将触点互连到相应的数字线的方法
    • US06329686B1
    • 2001-12-11
    • US09439623
    • 1999-11-12
    • Tyler A. LowreyShubneesh Batra
    • Tyler A. LowreyShubneesh Batra
    • H01L2972
    • H01L27/10888H01L21/76895H01L27/10814H01L27/10885H01L27/112
    • A method of interconnecting bit contacts to corresponding digit lines of a semiconductor memory device. The method is particularly useful for fabricating semiconductor memory devices having digit lines that are less than about 0.2 microns wide and spaced less than about 0.2 microns apart from one another. A mask, which shields portions of the digit lines of the semiconductor device, through which portions of the digit lines proximate the bit contacts are exposed, is disposed over the semiconductor device. The mask preferably includes elongated apertures alignable transversely to the digit lines. Dopant is directed toward the semiconductor device at a non-perpendicular angle to a plane of the semiconductor device. Thus, portions of the sidewall spacers of one side of each of the digit lines, sidewall spacers on the opposite sides of the digit lines, or the bit contacts may not be exposed to dopant. Doped oxide regions of the sidewall spacers may be removed with selectivity over undoped oxide regions or silicon nitride regions of the sidewall spacers. As the doped oxide regions are removed from the digit lines, a connect region of a conductive element of each of the digit lines is exposed. Conductive material may then be disposed adjacent the exposed connect region of the conductive element and in contact with the bit contact to establish an electrical link between the bit contact and its corresponding digit line. Semiconductor devices including such a conductive strap structure and, in particular, semiconductor devices which employ a conductive strap to interconnect a bit contact and a digit line having widths of less than about 0.2 microns and spaced less than about 0.2 microns apart from an adjacent digit line are also within the scope of the present invention.
    • 将位触点互连到半导体存储器件的相应数字线的方法。 该方法特别适用于制造具有小于约0.2微米宽并且彼此间隔小于约0.2微米的数字线的半导体存储器件。 屏蔽半导体器件的数字线的部分,靠近位触点的数位线的部分被暴露的掩模设置在半导体器件上。 掩模优选地包括横向于数字线对准的细长孔。 掺杂剂以与半导体器件的平面非垂直的角度指向半导体器件。 因此,每个数字线的一侧,数字线的相对侧上的侧壁间隔物或位触点的部分侧壁间隔物可能不暴露于掺杂剂。 可以在侧壁间隔物的未掺杂氧化物区域或氮化硅区域上选择性地去除侧壁间隔物的掺杂氧化物区域。 随着从数字线移除掺杂氧化物区域,每个数字线的导电元件的连接区域被暴露。 然后可以将导电材料设置在导电元件的暴露的连接区域附近并与位触点接触,以在位触点和其相应的数字线之间建立电连接。 包括这种导电带结构的半导体器件,特别是采用导电带来互连位触点和数字线的半导体器件,其宽度小于约0.2微米,间隔小于约0.2微米,与相邻数字线 也在本发明的范围内。