Method and apparatus for characterizing features formed on a substrate
    21.
    发明授权
    Method and apparatus for characterizing features formed on a substrate 失效
    用于表征形成在基板上的特征的方法和装置

    公开(公告)号:US07459319B2

    公开(公告)日:2008-12-02

    申请号:US11681843

    申请日:2007-03-05

    IPC分类号: H01L23/58 H01L21/00

    摘要: A method and apparatus for testing and characterizing features formed on a substrate. In one embodiment, a test structure is provided that includes a test element having a first side and an opposing second side. A first set of one or more structures defining a first region having a first local density are disposed adjacent the first side of the test element. A second set of one or more structures defining a second region having a second local density are disposed adjacent the second side of the test element. A third set of one or more structures defining a third region having a first global density are disposed adjacent the first region. A fourth set of one or more structures defining a fourth region having a second global density are disposed adjacent the second region.

    摘要翻译: 一种用于测试和表征在基板上形成的特征的方法和装置。 在一个实施例中,提供了包括具有第一侧和相对的第二侧的测试元件的测试结构。 限定具有第一局部密度的第一区域的一个或多个结构的第一组结构设置在测试元件的第一侧附近。 限定具有第二局部密度的第二区域的一个或多个结构的第二组结构设置在测试元件的第二侧附近。 限定具有第一全局密度的第三区域的一个或多个结构的第三组结构设置在第一区域附近。 限定具有第二全局密度的第四区域的第四组一个或多个结构设置在第二区域附近。

    Method and apparatus for characterizing features formed on a substrate
    23.
    发明授权
    Method and apparatus for characterizing features formed on a substrate 失效
    用于表征形成在基板上的特征的方法和装置

    公开(公告)号:US07196350B2

    公开(公告)日:2007-03-27

    申请号:US11128133

    申请日:2005-05-12

    IPC分类号: H01L23/58

    摘要: A method and apparatus for testing and characterizing features formed on a substrate. In one embodiment, a test structure is provided that includes a test element having a first side and an opposing second side. A first set of one or more structures defining a first region having a first local density are disposed adjacent the first side of the test element. A second set of one or more structures defining a second region having a second local density are disposed adjacent the second side of the test element. A third set of one or more structures defining a third region having a first global density are disposed adjacent the first region. A fourth set of one or more structures defining a fourth region having a second global density are disposed adjacent the second region.

    摘要翻译: 一种用于测试和表征在基板上形成的特征的方法和装置。 在一个实施例中,提供了包括具有第一侧和相对的第二侧的测试元件的测试结构。 限定具有第一局部密度的第一区域的一个或多个结构的第一组结构设置在测试元件的第一侧附近。 限定具有第二局部密度的第二区域的一个或多个结构的第二组结构设置在测试元件的第二侧附近。 限定具有第一全局密度的第三区域的一个或多个结构的第三组结构设置在第一区域附近。 限定具有第二全局密度的第四区域的第四组一个或多个结构设置在第二区域附近。

    Method for enhancing field oxide thickness at field oxide perimeters
    25.
    发明授权
    Method for enhancing field oxide thickness at field oxide perimeters 失效
    在场氧化物周边增强场氧化物厚度的方法

    公开(公告)号:US5686346A

    公开(公告)日:1997-11-11

    申请号:US622696

    申请日:1996-03-26

    申请人: Michael P. Duane

    发明人: Michael P. Duane

    IPC分类号: H01L21/762 H01L21/76

    CPC分类号: H01L21/76216 Y10S438/911

    摘要: A method for enhancing the thickness of a field oxide layer at perimeters of the field regions is presented. The use of a relatively thin pad oxide layer under a nitride layer reduces lateral encroachment of the field oxide layer into device active areas, but also results in undesirable elevational disparities in an upper surface of the field oxide layer near perimeters. Elevational disparities are created when the field oxide layer grows up and around vertical edges of remaining portions of the patterned nitride layer. An oxide deposition step followed by a directional etch process are used to fill in the elevational disparities, increasing the thickness of the field oxide layer at perimeters of the field regions. In a first embodiment, an oxide layer is deposited over the exposed surface following removal of remaining portions of the nitride layer over device active areas. In a second and third embodiment, oxide layer deposition and etch follow removal of substantially all of the remaining portions of the pad oxide layer and an upper portion of the field oxide layer as to expose the silicon substrate in device active areas. In the third embodiment, a sacrificial oxide layer is grown in and on device active areas prior to oxide layer deposition and etch.

    摘要翻译: 提出了一种用于增强场区域周围的场氧化物层厚度的方法。 在氮化物层下面使用相对薄的衬垫氧化物层减少了场氧化物层的横向侵入到器件有源区域中,而且导致近场外场氧化物层的上表面的不希望的高差。 当场氧化物层在图案化氮化物层的剩余部分的垂直边缘生长并且围绕着垂直边缘时产生高度差异。 随后进行定向蚀刻工艺的氧化物沉积步骤用于填充高程差异,增加场区域周边的场氧化物层的厚度。 在第一实施例中,在将氮化物层的剩余部分去除器件有源区域之后,将氧化物层沉积在暴露表面上。 在第二和第三实施例中,氧化物层沉积和蚀刻随后去除衬垫氧化物层的基本上所有其余部分和场氧化物层的上部,以便在器件有源区域中暴露硅衬底。 在第三实施例中,牺牲氧化物层在氧化物层沉积和蚀刻之前生长在器件有源区域中和之上。