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    • 3. 再颁专利
    • Optimized container stacked capacitor dram cell utilizing sacrificial oxide deposition and chemical mechanical polishing
    • 利用牺牲氧化物沉积和化学机械抛光优化容器堆叠电容器电容器
    • USRE38049E1
    • 2003-03-25
    • US08759058
    • 1996-10-07
    • Charles H. DennisonMichael A. Walker
    • Charles H. DennisonMichael A. Walker
    • H01L2120
    • H01L28/91
    • An existing stacked capacitor fabrication process is modified to construct a three-dimensional stacked container capacitor. The present invention develops the container capacitor by etching an opening (or contact opening) into a low etch rate oxide. The contact opening is used as a form for deposited polysilicon that conforms to the sides of the opening walls. Within the thin poly lining of the oxide container a high etch-rate oxide, such as ozone TEOS, is deposited over the entire structure thereby bridging across the top of the oxide container. The high etch-rate oxide is planarized back to the thin poly and the resulting exposed poly is then removed to separate neighboring containers. The two oxides, having different etch rates, are then etched thereby leaving a free-standing poly container cell with 100% (or all) of the higher etch rate oxide removed and a pre-determined oxide surrounding the container still intact.
    • 修改现有的堆叠电容器制造工艺以构建三维堆叠容器电容器。 本发明通过将开口(或接触开口)蚀刻成低蚀刻速率氧化物来开发容器电容器。 接触开口用作与开口壁的侧面一致的沉积多晶硅的形式。 在氧化物容器的薄多孔衬里内,在整个结构上沉积诸如臭氧TEOS的高蚀刻速率氧化物,从而桥接穿过氧化物容器的顶部。 将高蚀刻速率的氧化物平面化回到薄的多晶硅上,然后除去所得到的暴露的聚合物以分离相邻的容器。 然后蚀刻具有不同蚀刻速率的两种氧化物,从而留下独立的多容器电池,其具有100%(或全部)更高蚀刻速率的氧化物,并且包围容器的预定氧化物仍然完整。
    • 4. 发明授权
    • Treatment of exposed silicon and silicon dioxide surfaces
    • 处理暴露的硅和二氧化硅表面
    • US06521534B1
    • 2003-02-18
    • US09639369
    • 2000-08-15
    • Karl M. RobinsonMichael A. Walker
    • Karl M. RobinsonMichael A. Walker
    • H01L21302
    • H01L21/02052B08B3/08C11D7/06C11D7/08C11D11/0047H01L21/67051H01L21/67057
    • A chemical mechanical polishing step is performed to expose a silicon/silicon dioxide interface on a surface situated on a semiconductor substrate. The semiconductor substrate is dipped in a solution of about 200 parts of deionized water, about 1 part of hydrofluoric acid, and at least 5 parts tetramethyl ammonium hydroxide. The exposed silicon/silicon dioxide interface is then contacted with an organic carboxylic acid surfactant having a critical micelle concentration greater than or equal to 1−7 m/l and having a pH from about 2.2 to about 7. Lastly, the exposed silicon/silicon dioxide interface is rinsed in deionized water or sulfuric acid to remove silicon dioxide particles from the exposed silicon/silicon dioxide interface, leaving a very clean, low particulate surface on both the silicon dioxide and silicon portions thereof, with little or no etching of the silicon portion.
    • 进行化学机械抛光步骤以暴露位于半导体衬底上的表面上的硅/二氧化硅界面。 将半导体衬底浸入约200份去离子水,约1份氢氟酸和至少5份氢氧化四甲基铵溶液中。 然后暴露的硅/二氧化硅界面与具有大于或等于1-7m / l的临界胶束浓度并且具有约2.2至约7的pH的有机羧酸表面活性剂接触。最后,暴露的硅/硅 二氧化硅界面在去离子水或硫酸中漂洗以从暴露的硅/二氧化硅界面中除去二氧化硅颗粒,在其二氧化硅和硅部分上留下非常干净的低颗粒表面,几乎没有或没有蚀刻硅 一部分。
    • 6. 发明授权
    • Polishing pad and system
    • 抛光垫和系统
    • US06277015B1
    • 2001-08-21
    • US09300007
    • 1999-04-26
    • Karl M. RobinsonMichael A. Walker
    • Karl M. RobinsonMichael A. Walker
    • B24D1100
    • B24B37/26B24B41/047
    • The present invention comprises a method of chemical-mechanical polishing of a surface on a semiconductor substrate by providing a fixed-abrasive polishing pad; providing a surface to be polished; and providing a chemical polishing solution containing a surface tension-lowering agent that lowers the surface tension of the solution from the nominal surface tension of water to a surface tension that sufficiently wets a hydrophobic surface to be polished such that chemical-mechanical polishing is accomplished. The present invention also comprises pad improvements that mechanically sweep the polishing solution under the pad or that receive polishing solution from the back of the pad such that a tangential and radial shear is placed on the polishing solution as it flows away from the pad.
    • 本发明包括通过提供固定研磨抛光垫对半导体衬底上的表面进行化学机械抛光的方法; 提供要抛光的表面; 并且提供含有表面张力降低剂的化学抛光溶液,其将溶液的表面张力从水的标称表面张力降低到充分润湿要抛光的疏水表面的表面张力,从而实现化学机械抛光。 本发明还包括垫片改进,其将抛光溶液机械地扫过垫片下方或者从垫的背面接收抛光溶液,使得当抛光溶液从衬垫流出时,切向和径向剪切被放置在抛光溶液上。
    • 7. 发明授权
    • Polishing polymer surfaces on non-porous CMP pads
    • 在无孔CMP垫上抛光聚合物表面
    • US06200901B1
    • 2001-03-13
    • US09095299
    • 1998-06-10
    • Guy F. HudsonMichael A. Walker
    • Guy F. HudsonMichael A. Walker
    • C09K1300
    • G03F7/40H01L21/31053H01L21/31133H01L21/31138
    • Methods of oxidizing the surface of a photoresist material on a semiconductor substrate to alter the photoresist material surface to be substantially hydrophillic. Oxidation of the photoresist material surface substantially reduces or eliminates stiction between a planarizing pad and the photoresist material surface during chemical mechanical planarization. This oxidation of the photoresist material may be achieved by oxygen plasma etching or ashing, by immersing the semiconductor substrate in a bath containing an oxidizing agent, or by the addition of an oxidizing agent to the chemical slurry used during planarization of the resist material.
    • 在半导体衬底上氧化光致抗蚀剂材料的表面以将光致抗蚀剂材料表面改变为基本上是亲水的方法。 在化学机械平面化期间,光致抗蚀剂材料表面的氧化大大减少或消除了平坦化焊盘和光致抗蚀剂材料表面之间的静摩擦。 光致抗蚀剂材料的这种氧化可以通过将半导体衬底浸入含有氧化剂的浴中,或者通过在抗蚀剂材料的平坦化期间使用的化学浆料中加入氧化剂,通过氧等离子体蚀刻或灰化来实现。