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    • 1. 发明授权
    • Method for forming a high surface area trench capacitor
    • 高表面积沟槽电容器的形成方法
    • US06319787B1
    • 2001-11-20
    • US09107980
    • 1998-06-30
    • Gerhard EndersMatthias IlgDietrich Widmann
    • Gerhard EndersMatthias IlgDietrich Widmann
    • H01L2120
    • H01L27/10861H01L27/10829
    • A trench capacitor having a substrate with a trench extending therein with a nested, e.g., concentric, conductive regions disposed within the trench. A dielectric material is disposed within the substrate. The dielectric material has portions thereof disposed between the concentric conductive regions to dielectrically electrically separate one of the conductive regions from another one of the conductive regions. The dielectrically separated conductive regions provide a pair of electrodes for the capacitor. Selected ones of the concentric conductive regions are electrically connected to provide one of the electrodes for the capacitor. The substrate has a conductive region therein and one of the concentric conductive regions providing one of the electrodes is electrically connected to the conductive region in the substrate. One of the concentric conductive regions is electrically connected to a conductive region in the substrate through a bottom portion of the trench.
    • 一种沟槽式电容器,其具有在其中延伸有沟槽的衬底,其具有设置在沟槽内的嵌套的,例如同心的导电区域。 电介质材料设置在衬底内。 电介质材料具有设置在同心导电区域之间的部分,以将导电区域中的一个与另一个导电区域电介质电分离。 介电分离的导电区域为电容器提供一对电极。 选择的同心导电区域被电连接以提供用于电容器的电极之一。 衬底在其中具有导电区域,并且提供电极之一的同心导电区域中的一个电连接到衬底中的导电区域。 一个同心导电区域通过沟槽的底部电连接到衬底中的导电区域。
    • 4. 发明授权
    • Integrated circuits and manufacturing methods
    • 集成电路和制造方法
    • US06492282B1
    • 2002-12-10
    • US08846925
    • 1997-04-30
    • Dirk TobbenPeter WeigandMatthias Ilg
    • Dirk TobbenPeter WeigandMatthias Ilg
    • H01L21316
    • H01L21/31051H01L21/76801H01L21/76825H01L21/76826H01L21/76828H01L21/76837
    • A method of filling gaps between adjacent gate electrodes of a semiconductor structure. A self-planarizing material is deposited over the structure. A first portion of such material flow between the gate electrode to fill the gaps and a second portion of such material becomes deposited over tops of the gate electrodes and over the gaps to form a layer with a substantially planar surface. A phosphorous dopant is formed in the second portion of the self-planarizing material. Thus, relatively small gaps may be filled effectively with a layer having a very planar surface for subsequent photolithography. The phosphorous dopant provides gettering to remove adverse effects of alkali contaminant ions which may enter the gap filling material. The dielectric constant of the material filing the gaps, i.e., the first portion of the gap filling material, being substantially free of such contaminants, has a relatively low dielectric constant thereby reducing electrical coupling between adjacent electrodes. The self-planarizing material is a flowable material. The flowable oxide may be spun on or may be deposited by gaseous deposition. The phosphorous dopant may be provided by, for example: implanting phosphorous ions into the second portion of the self-planarizing layer and heating the material to both cure such material and activate the phosphorous ions; depositing a phosphorous doped layer over the layer of self-planarizing material, heating the structure to out-diffuse the phosphorous dopant into the second portion of the self-planarizing material and selectively removing the deposited layer; or by curing the spun-on self-planarizing material in a phosphine environment.
    • 一种在半导体结构的相邻栅电极之间填充间隙的方法。 在该结构上沉积自平面化材料。 这种材料的第一部分在栅极电极之间流动以填充间隙,并且这种材料的第二部分沉积在栅电极的顶部上并在间隙上沉积以形成具有基本平坦表面的层。 在自平面化材料的第二部分中形成磷掺杂剂。 因此,可以用具有非常平坦的表面的层有效地填充相对小的间隙用于随后的光刻。 磷掺杂剂提供吸气以除去可能进入间隙填充材料的碱性污染物离子的不利影响。 填充间隙的材料的介电常数,即间隙填充材料的第一部分基本上没有这种污染物,具有相对低的介电常数,从而减少相邻电极之间的电耦合。 自平面化材料是可流动的材料。 可流动的氧化物可以通过气相沉积或在其上沉积。 磷掺杂剂可以通过例如:将磷离子注入到自平坦化层的第二部分中并加热材料以固化这种材料并激活磷离子来提供磷掺杂剂; 在所述自平面化材料层上沉积磷掺杂层,加热所述结构以将所述磷掺杂剂扩散到所述自平面化材料的第二部分中并选择性地去除所述沉积层; 或通过在磷化氢环境中固化纺丝自平面化材料。
    • 5. 发明授权
    • Fabrication of trench capacitors using disposable hard mask
    • 使用一次性硬掩模制作沟槽电容器
    • US06190955B1
    • 2001-02-20
    • US09014433
    • 1998-01-27
    • Matthias IlgRichard L. KleinhenzSoichi NadaharaRonald W. NunesKlaus PennerKlaus RoithnerRadhika SrinivasanShigeki Sugimoto
    • Matthias IlgRichard L. KleinhenzSoichi NadaharaRonald W. NunesKlaus PennerKlaus RoithnerRadhika SrinivasanShigeki Sugimoto
    • H01L218244
    • H01L21/3081
    • Improved trench forming methods for semiconductor substrates using BSG avoid the problems associated with conventional TEOS hard mask techniques. The methods comprise: (a) providing a semiconductor substrate, (b) applying a conformal layer of borosilicate glass (BSG) on the substrate; (c) forming a patterned photoresist layer over the BSG layer whereby a portion of a layer underlying the photoresist layer is exposed, (d) anisotropically etching through the exposed portion of the underlying layer, through any other layers lying between the photoresist layer and the semiconductor substrate, and into the semiconductor substrate, thereby forming a trench in the semiconductor substrate. Preferably, one or more dielectric layers are present on the substrate surface prior to application of the BSG layer. One or more chemical barrier and/or organic antireflective coating layers may be applied over the BSG layer between the BSG layer and the photoresist layer. The methods are especially useful for forming deep trenches in silicon substrates with pad dielectric layers.
    • 使用BSG的半导体衬底的改进的沟槽形成方法避免了与常规TEOS硬掩模技术相关的问题。 所述方法包括:(a)提供半导体衬底,(b)在衬底上施加保形层硼硅酸盐玻璃(BSG);(c)在BSG层上形成图案化的光刻胶层,由此在光刻胶下面的一部分层 (d)通过位于光致抗蚀剂层和半导体衬底之间的任何其它层,通过底层的暴露部分进行各向异性蚀刻,并进入半导体衬底,由此在半导体衬底中形成沟槽。优选地,一个 或更多的介电层在施加BSG层之前存在于衬底表面上。 可以在BSG层和光致抗蚀剂层之间的BSG层上施加一个或多个化学屏障和/或有机抗反射涂层。 该方法对于在具有焊盘电介质层的硅衬底中形成深沟槽特别有用。