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    • 52. 发明授权
    • UHF/VHF plasma for use in forming integrated circuit structures on
semiconductor wafers
    • UHF / VHF等离子体,用于在半导体晶片上形成集成电路结构
    • US5300460A
    • 1994-04-05
    • US32744
    • 1993-03-16
    • Kenneth S. CollinsCraig A. RoderickChan-Lon YangDavid N. K. WangDan Maydan
    • Kenneth S. CollinsCraig A. RoderickChan-Lon YangDavid N. K. WangDan Maydan
    • C23C16/509H01J37/32H05H1/46H01L21/00H01L21/02H01L21/22H01L21/265
    • H01J37/32174C23C16/509H01J37/32082H05H1/46
    • An improved method of fabricating integrated circuit structures on semiconductor wafers using a plasma-assisted process is disclosed wherein the plasma is generated by a VHF/UHF power source at a frequency ranging from about 50 to about 800 MHz. Low pressure plasma-assisted etching or deposition processes, i.e., processes may be carried out within a pressure range not exceeding about 500 milliTorr; with a ratio of anode to cathode area of from about 2:1 to about 20:1, and an electrode spacing of from about 5 cm. to about 30 cm. High pressure plasma-assisted etching or deposition processes, i.e., processes may be carried out with a pressure ranging from over 500 milliTorr up to 50 Torr or higher; with an anode to cathode electrode spacing of less than about 5 cm. By carrying out plasma-assisted processes using plasma operated within a range of from about 50 to about 800 MHz, the electrode sheath voltages are maintained sufficiently low, so as to avoid damage to structures on the wafer, yet sufficiently high to preferably permit initiation of the processes without the need for supplemental power sources. Operating in this frequency range may also result in reduction or elimination of microloading effects.
    • 公开了使用等离子体辅助方法制造半导体晶片上的集成电路结构的改进方法,其中等离子体由VHF / UHF电源以约50至约800MHz的频率产生。 低压等离子体辅助蚀刻或沉积工艺,即工艺可以在不超过约500毫托的压力范围内进行; 阳极与阴极面积的比例为约2:1至约20:1,电极间距约为5cm。 到约30厘米。 高压等离子体辅助蚀刻或沉积工艺,即工艺可以在500毫乇至50乇以上的压力下进行; 阳极至阴极间距小于约5厘米。 通过使用在约50至约800MHz的范围内操作的等离子体等离子体辅助处理,电极护套电压保持足够低,以避免损坏晶片上的结构,但足够高以优选允许引发 该过程无需补充电源。 在该频率范围内工作也可能导致微载物效应的降低或消除。
    • 55. 发明授权
    • Method of etching sacrificial layer
    • 蚀刻牺牲层的方法
    • US08298950B2
    • 2012-10-30
    • US12830370
    • 2010-07-05
    • Chan-Lon YangYeng-Peng WangChiu-Hsien Yeh
    • Chan-Lon YangYeng-Peng WangChiu-Hsien Yeh
    • H01L21/311
    • H01L21/823842H01L21/32134H01L21/32135H01L27/11H01L27/1104
    • An exemplary method of etching sacrificial layer includes steps of: providing a substrate formed with a sacrificial layer and defined with a first region and a second region, the sacrificial layer disposed in both the first and second regions; forming a hard mask covering the first region while exposing the second region; performing a first etching process on the sacrificial layer to thin the sacrificial layer while forming a byproduct film overlying the thinned sacrificial layer; performing a second etching process on the byproduct film to remove a portion of the byproduct layer for exposing a portion of the thinned sacrificial layer, while another portion of the byproduct film disposed on sidewalls of the thinned sacrificial layer being remained; and performing a third etching process on the thinned sacrificial layer, to remove the portion of the thinned sacrificial layer exposed in the second etching process.
    • 蚀刻牺牲层的示例性方法包括以下步骤:提供形成有牺牲层并且由第一区域和第二区域限定的衬底,所述牺牲层设置在第一和第二区域中; 在暴露所述第二区域的同时形成覆盖所述第一区域的硬掩模; 在所述牺牲层上执行第一蚀刻工艺以使所述牺牲层变薄,同时形成覆盖所述薄化的牺牲层的副产物膜; 在副产品膜上执行第二蚀刻工艺以去除副产物层的一部分,用于暴露部分减薄的牺牲层,同时保留设置在减薄的牺牲层的侧壁上的副产物膜的另一部分; 以及对所述减薄的牺牲层执行第三蚀刻工艺,以去除在所述第二蚀刻工艺中暴露的所述薄化牺牲层的所述部分。
    • 58. 发明授权
    • Methods for cleaning contact openings to reduce contact resistance
    • 清洁接触开口以减少接触电阻的方法
    • US07253094B1
    • 2007-08-07
    • US10993031
    • 2004-11-19
    • Jie ZhangVinay KrishnaChan-Lon Yang
    • Jie ZhangVinay KrishnaChan-Lon Yang
    • H01L21/4763
    • H01L21/76897H01L21/02063H01L21/32134H01L21/76814
    • A method for processing a semiconductor topography which includes removing metal oxide layers from the bottom of contact openings is provided. In some embodiments, the method may include etching openings within a dielectric layer to expose conductive and silicon surfaces within the semiconductor topography is provided. In such cases, the method further includes exposing the semiconductor topography to an etch process adapted to remove metal oxide material from the conductive surfaces without substantially removing material from the silicon surfaces. In some cases, the etch chemistry used for the etch process may include sulfuric acid. In addition or alternatively, the etch chemistry may include hydrogen peroxide. In any case, the etch chemistry may be distinct from chemistries used to remove residual matter generated from the etch process used to form the openings within the dielectric and/or the removal of the masking layer used to pattern the openings.
    • 提供一种处理半导体形貌的方法,其包括从接触孔的底部去除金属氧化物层。 在一些实施例中,该方法可以包括蚀刻介电层内的开口以暴露半导体形貌中的导电和硅表面。 在这种情况下,该方法还包括将半导体形貌暴露于适于从导电表面除去金属氧化物材料的蚀刻工艺,而基本上不从硅表面去除材料。 在一些情况下,用于蚀刻工艺的蚀刻化学可能包括硫酸。 另外或替代地,蚀刻化学品可以包括过氧化氢。 在任何情况下,蚀刻化学可能不同于用于去除由用于在电介质中形成开口的蚀刻工艺产生的残余物质和/或去除用于图案化开口的掩模层的化学物质。
    • 60. 发明授权
    • Polycide gate structure and method of manufacture
    • 聚酰胺门结构及其制造方法
    • US06492250B1
    • 2002-12-10
    • US09638923
    • 2000-08-15
    • Hidetake HoriuchChan-Lon Yang
    • Hidetake HoriuchChan-Lon Yang
    • H01L214763
    • H01L29/4933H01L21/28061
    • A polycide gate structure and a method of forming the polycide gate. A substrate having a gate dielectric layer, a polysilicon layer, a silicide layer and an insulation layer thereon is provided. The polysilicon layer is above the gate dielectric layer, the silicide layer is above the polysilicon layer, and the insulation layer is above the silicide layer. A patterned photoresist layer is formed over the insulation layer. Using the photoresist layer as a mask, an anisotropic etching operation is carried out to remove the exposed insulation layer. Again using the photoresist layer as a mask, a first type of plasma is used to carry out a first anisotropic etching operation to remove the exposed silicide layer. A metallic oxide layer is formed on the sidewalls of the silicide layer by the oxidation of a portion of the retained silicide layer. Using the photoresist layer as a mask, a second type of plasma is used to carry out a second anisotropic etching operation to remove the exposed polysilicon layer. The metallic oxide layer is resistant to attack by the second type of plasma.
    • 多晶硅栅极结构和形成多晶硅栅极的方法。 提供了具有栅极电介质层,多晶硅层,硅化物层及其绝缘层的衬底。 多晶硅层位于栅极电介质层之上,硅化物层位于多晶硅层上方,绝缘层位于硅化物层之上。 在绝缘层上形成图案化的光致抗蚀剂层。 使用光致抗蚀剂层作为掩模,进行各向异性蚀刻操作以去除暴露的绝缘层。 再次使用光致抗蚀剂层作为掩模,使用第一类型的等离子体进行第一各向异性蚀刻操作以除去暴露的硅化物层。 通过一部分保留的硅化物层的氧化,在硅化物层的侧壁上形成金属氧化物层。 使用光致抗蚀剂层作为掩模,使用第二类型的等离子体进行第二种各向异性蚀刻操作以去除暴露的多晶硅层。 金属氧化物层耐受第二类型等离子体的侵蚀。