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    • 2. 发明授权
    • Method for fabricating a shallow-trench isolation structure with a
rounded corner in integrated circuit
    • 用于在集成电路中制造具有圆角的浅沟槽隔离结构的方法
    • US5956598A
    • 1999-09-21
    • US164736
    • 1998-10-01
    • Kuo-Tai HuangGwo-Shii YangTri-Rung YewWater Lur
    • Kuo-Tai HuangGwo-Shii YangTri-Rung YewWater Lur
    • H01L21/762H01L21/76
    • H01L21/76224
    • A semiconductor fabrication method is provided for fabricating a shallow-trench isolation (STI) structure with a rounded corner in integrated circuits through a rapid thermal process (RTP). In the fabrication of the STI structure, a sharp corner is often undesirably formed. This sharp corner , if not eliminated, causes the occurrence of a leakage current when the resultant IC device is in operation that significantly degrades the performance of the resultant IC device. To eliminate this sharp corner , an RTP is performed at a temperature of above 1,100.degree. C., which temperature is higher than the glass transition temperature of the substrate, for about 1 to 2 minutes. The result is that the surface of the substrate is oxidized into an sacrificial oxide layer and the sharp corner is deformed into a rounded shape with a larger convex radius of curvature. This allows the problems arising from the existence of the sharp corner to be substantially eliminated. Compared to the prior art, this method not only is more simplified in process, but also allows a considerable saving in thermal budget, which makes this method more cost-effective to implement than the prior art.
    • 提供半导体制造方法,用于通过快速热处理(RTP)在集成电路中制造具有圆角的浅沟槽隔离(STI)结构。 在STI结构的制造中,通常不希望地形成尖锐的拐角。 如果不消除这个尖角,则当所得到的IC器件运行时会导致泄漏电流的发生,这显着降低了所得IC器件的性能。 为了消除这个尖角,RTP在高于1100℃的温度下进行,该温度高于基板的玻璃化转变温度约1至2分钟。 其结果是,衬底的表面被氧化成牺牲氧化物层,并且尖角变形为具有较大凸曲率半径的圆形形状。 这允许基本上消除由尖角存在引起的问题。 与现有技术相比,该方法不仅在过程中更简化,而且还可以大大节省热预算,这使得该方法比现有技术更具成本效益。
    • 3. 发明授权
    • Method of manufacturing shallow trench isolation
    • 制造浅沟槽隔离的方法
    • US06251783B1
    • 2001-06-26
    • US09189847
    • 1998-11-12
    • Tri-Rung YewKuo-Tai HuangGwo-Shii YangWater Lur
    • Tri-Rung YewKuo-Tai HuangGwo-Shii YangWater Lur
    • H01L21302
    • H01L21/31053H01L21/76229
    • A method of manufacturing shallow trench isolation structures. The method includes the steps of depositing insulating material into the trench of a substrate to form an insulation layer. The substrate has a plurality of active regions, each occupying a different area and having different sizes. In addition, there is a silicon nitride layer on top of each active region. Thereafter, a photoresist layer is then deposited over the insulation layer. Next, a portion of the photoresist layer is etched back to expose a portion of the oxide layer so that the remaining photoresist material forms a cap layer over the recessed area of the insulation layer. Subsequently, using the photoresist cap layer as a mask, the insulation layer is etched to remove a portion of the exposed oxide layer, thereby forming trenches within the oxide layer. After that, the photoresist cap layer is removed. Finally, a chemical-mechanical polishing operation is carried out to polish the insulation layer until the silicon nitride layer is exposed.
    • 制造浅沟槽隔离结构的方法。 该方法包括以下步骤:将绝缘材料沉积到衬底的沟槽中以形成绝缘层。 基板具有多个活性区域,每个活性区域占据不同的区域并且具有不同的尺寸。 此外,在每个有源区的顶部有一个氮化硅层。 此后,然后将光致抗蚀剂层沉积在绝缘层上。 接下来,将光致抗蚀剂层的一部分回蚀刻以暴露氧化物层的一部分,使得剩余的光致抗蚀剂材料在绝缘层的凹陷区域上形成覆盖层。 随后,使用光致抗蚀剂覆盖层作为掩模,蚀刻绝缘层以去除暴露的氧化物层的一部分,从而在氧化物层内形成沟槽。 之后,去除光致抗蚀剂覆盖层。 最后,进行化学机械抛光操作以抛光绝缘层,直到暴露氮化硅层。
    • 7. 发明授权
    • Method of forming a liner for shallow trench isolation
    • 浅沟槽隔离衬垫的形成方法
    • US06180492B2
    • 2001-01-30
    • US09237298
    • 1999-01-25
    • Hsueh-Hao ShihTri-Rung YewWater LurGwo-Shii Yang
    • Hsueh-Hao ShihTri-Rung YewWater LurGwo-Shii Yang
    • H01L2176
    • H01L21/76224
    • An improved method for forming shallow trench isolation structure is described. The present method comprises the steps of providing a pad oxide layer and a mask layer on a semiconductor substrate and forming a trench structure therein. Next, a liner oxide layer is formed on the surface of the trench structure in the semiconductor substrate and is extensively formed on the side surface of the mask layer exposed therein and the top surface of the mask layer by wet oxidation. A dielectric material is deposited on the liner oxide layer and fills the trench structure. The dielectric material layer is planarized. The mask layer and the pad oxide layer are then removed to form the isolation structures. The method for forming the shallow trench structures on a semiconductor structure in accordance with the present invention can eliminate the kink effect that occurs in the conventional method.
    • 描述了一种用于形成浅沟槽隔离结构的改进方法。 本方法包括以下步骤:在半导体衬底上提供衬垫氧化物层和掩模层,并在其中形成沟槽结构。 接下来,在半导体衬底中的沟槽结构的表面上形成衬垫氧化物层,并且通过湿氧化在其中暴露于其中的掩模层的侧表面和掩模层的顶表面上广泛地形成衬里氧化物层。 电介质材料沉积在衬垫氧化物层上并填充沟槽结构。 介电材料层被平坦化。 然后去除掩模层和焊盘氧化物层以形成隔离结构。 根据本发明的在半导体结构上形成浅沟槽结构的方法可以消除在常规方法中发生的扭结效应。