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    • 3. 发明授权
    • Chemical mechanical polishing in forming semiconductor device
    • 化学机械抛光成型半导体器件
    • US06790742B2
    • 2004-09-14
    • US10293243
    • 2002-11-13
    • Ming-Sheng YangJuan-Yuan WuWater Lur
    • Ming-Sheng YangJuan-Yuan WuWater Lur
    • H01L2176
    • H01L21/76229
    • A method of chemical-mechanical polishing for forming a shallow trench isolation is disclosed. A substrate having a number of active regions, including a number of relatively large active regions and a number of relative small active regions, is provided. The method comprises the following steps. A silicon nitride layer on the substrate is formed. A number of shallow trenches are formed between the active regions one or more of which may constitute an alignment mark. An oxide layer is formed over the substrate, so that the shallow trenches are filled with the oxide layer. A partial reverse active mask is formed on the oxide layer. The partial reverse active mask exposes a portion of the oxide layer over the large active area and over the alignment mark. The oxide layer of each large active region and the alignment mark is removed. The partial reverse active mask is removed. The oxide layer is planarized.
    • 公开了用于形成浅沟槽隔离的化学机械抛光的方法。 提供了具有多个有效区域的基板,包括多个相对较大的有源区域和多个相对小的有源区域。 该方法包括以下步骤。 形成衬底上的氮化硅层。 在有源区域之间形成多个浅沟槽,其中一个或多个可以构成对准标记。 在衬底上形成氧化物层,使得浅沟槽被氧化物层填充。 在氧化物层上形成部分反向有源掩模。 部分反向有源掩模将氧化物层的一部分暴露在大的有效区域上方和对准标记之上。 去除每个大活性区域的氧化物层和对准标记。 去除部分反向主动掩模。 氧化层平坦化。
    • 9. 发明授权
    • Method for improving non-uniformity of chemical mechanical polishing by over coating
    • 通过过涂层改善化学机械抛光不均匀的方法
    • US06344408B1
    • 2002-02-05
    • US09296177
    • 1999-04-22
    • Hsueh-Chung ChenMing-Sheng YangJuan-Yuan WuWater Lur
    • Hsueh-Chung ChenMing-Sheng YangJuan-Yuan WuWater Lur
    • H01L214763
    • H01L21/3212
    • A method for improving non-uniformity of chemical mechanical polishing by over coating layer is disclosed. The essential point of the invention is that an over coating layer is formed over a surface before the surface is planarized by a chemical mechanical polishing process. Note that polishing rate of the over coating layer must be less than the polishing rate of the surface, where the ratio of polishing rate is called as selectivity. Because the topography of the surface is not uniform, the topography of the over coating layer also is non-uniform and then the polishing probability in different parts of the over coating layer is different. Obviously, when the over coating layer on the higher area part of the surface is totally consumed, these are residual over coating layer on the lower area part of the surface. Thus, over polishing in the lower area part is prevented by residual over coating layer. Before total over coating layer is polished, the polished account of the surface is higher in the high area part and is lower in the lower area part. Thus, uniformity of the surface is enhanced. Moreover, enhancement of uniformity is direct proportional to product of selectivity and depth of over coating layer.
    • 公开了一种通过过涂层改善化学机械抛光不均匀性的方法。 本发明的要点在于,在通过化学机械抛光工艺对表面进行平面化之前,在表面上形成过涂覆层。 注意,涂层的抛光速率必须小于抛光速率比被称为选择性的表面的抛光速率。 由于表面的形貌不均匀,外涂层的形貌也不均匀,在外涂层不同部位的抛光概率不同。 显然,当表面的较高区域部分上的过涂层完全消耗时,这些是在表面的下部区域上的残留涂层。 因此,通过残留的覆盖层来防止在下部区域部分的过度抛光。 在完全涂覆层被抛光之前,表面的抛光量在高面积部分较高,下部区域较低。 因此,表面的均匀性增强。 此外,均匀性的增强与涂层的选择性和深度的乘积成正比。
    • 10. 发明授权
    • Method of improving surface planarity of chemical-mechanical polishing operation by forming shallow dummy pattern
    • 通过形成浅虚拟图案提高化学机械抛光操作的表面平面度的方法
    • US06214745B1
    • 2001-04-10
    • US09195685
    • 1998-11-19
    • Ming-Sheng YangYimin HuangJuan-Yuan WuWater Lur
    • Ming-Sheng YangYimin HuangJuan-Yuan WuWater Lur
    • H01L2131
    • H01L21/7684H01L21/3212
    • A chemical-mechanical polishing method utilizes a shallow dummy pattern for planarizing a dielectric layer. The method includes the steps of first forming a shallow dummy pattern on the dielectric layer, and then coating a patterned photoresist layer over the dielectric layer. Thereafter, the photoresist layer is used as a mask to form openings in other areas of the dielectric layer. Subsequently, the photoresist layer is removed to expose the shallow dummy pattern, and then a glue/barrier layer and a conductive layer are sequentially deposited. Next, a chemical-mechanical polishing operation is carried out to remove excess conductive layer and glue/barrier layer above the dielectric layer as well as the shallow dummy pattern at the same time. Since the removal rate of glue/barrier layer in each area above the dielectric layer is about the same, a planar substrate surface is obtained.
    • 化学机械抛光方法利用浅哑图形来平坦化介电层。 该方法包括以下步骤:首先在电介质层上形成浅哑图案,然后在电介质层上涂覆图案化的光致抗蚀剂层。 此后,将光致抗蚀剂层用作掩模以在电介质层的其它区域中形成开口。 随后,去除光致抗蚀剂层以露出浅哑图案,然后依次沉积胶/阻挡层和导电层。 接下来,进行化学机械抛光操作,以同时去除介电层上方的多余的导电层和胶/阻挡层以及浅哑图案。 由于介电层上方的每个区域中胶/阻挡层的去除速率大致相同,所以获得了平坦的基板表面。