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    • 2. 发明授权
    • Viscous electropolishing system
    • 粘性电解抛光系统
    • US06935933B1
    • 2005-08-30
    • US10036621
    • 2001-12-21
    • Valeriy SukharevWilbur G. Catabay
    • Valeriy SukharevWilbur G. Catabay
    • B24B7/22C25F3/02H01L21/321H01L21/768
    • H01L21/7684C25F3/02H01L21/32115
    • A method for planarizing a surface of an electrically conductive layer on a substrate, where the surface of the electrically conductive layer has relatively high features and relatively low features. A viscous material is applied to the surface of the electrically conductive layer, whereby at least the relatively low features are covered by the viscous material. The substrate is immersed in an electrically conductive solution. An electrical potential is applied between the electrically conductive layer and an electrode within the electrically conductive solution, whereby reaction kinetics favor erosion of the electrically conductive layer. The electrically conductive solution is agitated, thereby selectively uncovering the viscous material from at least features that are relatively high, and thereby preferentially planarizing at least the features that are relatively high.
    • 一种用于平坦化基板上的导电层的表面的方法,其中导电层的表面具有相对较高的特征和相对较低的特征。 将粘性材料施加到导电层的表面,由此至少相对较低的特征被粘性材料覆盖。 将基板浸入导电溶液中。 在导电溶液中的导电层和电极之间施加电位,由此反应动力学有利于导电层的侵蚀。 搅动导电溶液,从而从至少相对高的特征选择性地露出粘性材料,从而优先至少平坦化至少相对高的特征。
    • 4. 发明授权
    • Method for determining via/contact pattern density effect in via/contact etch rate
    • 确定通孔/接触蚀刻速率的通孔/接触图案密度效应的方法
    • US07687303B1
    • 2010-03-30
    • US11264930
    • 2005-11-01
    • Valeriy SukharevAra Markosian
    • Valeriy SukharevAra Markosian
    • H01L21/44
    • H01L21/31116H01L21/76805H01L23/528H01L27/0207H01L2924/0002H01L2924/00
    • A method for determining an effect of via/contact pattern density in via/contact etch rate of a wafer includes determining a neutral etchant species number flux intersecting each via/contact mouth as a function of local layout characteristics and determining variations in the neutral etchant species flux number as a function of the via/contact pattern density in a wafer scale. The comparison of these number fluxes provides the capability to discriminate an underetched or an overetched via/contact from normal vias/contacts satisfying an etch tolerance criterion. Chip designers can modify the layout design to minimize via/contact failures. Chip manufacturers can modify the etching process to minimize via/contact failures.
    • 用于确定晶片的通孔/接触蚀刻速率中的通孔/接触图案密度的影响的方法包括确定与每个通孔/接触嘴相交的中性蚀刻剂种类数量通量作为局部布局特性的函数并确定中性蚀刻剂种类的变化 作为晶片尺度中的通孔/接触图案密度的函数的通量数。 这些数量通量的比较提供了区分未刻蚀或过蚀刻的通孔/触点与满足蚀刻耐受性标准的正常通孔/触点的能力。 芯片设计人员可以修改布局设计,以尽量减少通孔/接触故障。 芯片制造商可以修改蚀刻过程以最小化通孔/接触故障。
    • 9. 发明授权
    • Method of forming variable thickness gate dielectrics
    • 形成可变厚度栅极电介质的方法
    • US6033998A
    • 2000-03-07
    • US38684
    • 1998-03-09
    • Sheldon AronowitzDavid ChanJames KimballDavid LeeJohn HaywoodValeriy Sukharev
    • Sheldon AronowitzDavid ChanJames KimballDavid LeeJohn HaywoodValeriy Sukharev
    • H01L21/8234H01L21/76
    • H01L21/823462
    • Provided is a method of fabricating gate dielectric layers having variable thicknesses and compositions over different regions of a semiconductor wafer. In a preferred embodiment of the present invention, a gate oxide layer is first grown over the various regions. Regions that are to have a relatively thicker, unhardened gate dielectric are masked and the wafer is exposed to a remote low energy nitrogen plasma. After the nitridization process is completed, the mask is removed and the wafer is exposed to further oxidation. The regions where oxynitrides have been formed act as a barrier to the oxidation process. Consequently, different oxide thicknesses can be grown on the same wafer, thinner and hardened where nitridization has been performed, and thicker and not hardened in those regions that were masked during the nitridization. Variable thickness gate dielectrics in accordance with the present invention may be particularly advantageous in semiconductor integrated circuits involving both digital and analog devices.
    • 提供一种制造在半导体晶片的不同区域上具有可变厚度和组成的栅极电介质层的方法。 在本发明的优选实施例中,首先在各个区域上生长栅氧化层。 具有相对较厚,未硬化的栅极电介质的区域被掩蔽,并且晶片暴露于远程低能量氮等离子体。 在氮化处理完成之后,去除掩模并使晶片进一步氧化。 已经形成氮氧化物的区域用作氧化过程的屏障。 因此,可以在相同的晶片上生长不同的氧化物厚度,在已经进行氮化的情况下更薄并且硬化,并且在氮化期间被掩蔽的那些区域中较厚而不硬化。 根据本发明的可变厚栅极电介质在涉及数字和模拟装置的半导体集成电路中可能是特别有利的。