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    • 2. 发明授权
    • Method of contact structure formation
    • 接触结构形成方法
    • US06121129A
    • 2000-09-19
    • US784158
    • 1997-01-15
    • Nancy Anne GrecoStephen Edward GrecoTina Jane Wagner
    • Nancy Anne GrecoStephen Edward GrecoTina Jane Wagner
    • H01L21/28H01L21/768H01L21/4763
    • H01L21/768H01L21/76877
    • A method of forming a semiconductor structure having features of differing sizes, includes forming a first layer on a semiconductor substrate; patterning only a first plurality of features of a first feature size on the first layer; removing portions of the first layer, the portions corresponding to the first plurality of features, filling the first plurality of openings; forming a second layer, the second layer overlying the first layer and the filled openings; patterning a second plurality of features of a second feature size on the second layer; removing portions of the first layer and second layer, the portions corresponding to the second plurality of features, the second plurality of openings extending through the first and second layers, and filling the second plurality openings.
    • 一种形成具有不同尺寸特征的半导体结构的方法,包括在半导体衬底上形成第一层; 仅在第一层上构图第一特征尺寸的第一多个特征; 去除第一层的部分,对应于第一多个特征的部分,填充第一多个开口; 形成第二层,所述第二层覆盖所述第一层和所述填充的开口; 在第二层上构图第二特征尺寸的第二多个特征; 去除第一层和第二层的部分,对应于第二多个特征的部分,第二多个开口延伸穿过第一和第二层,并填充第二多个开口。
    • 3. 发明授权
    • Process for reducing pattern factor effects in CMP planarization
    • 降低CMP平面化中图案因素影响的方法
    • US5928960A
    • 1999-07-27
    • US738506
    • 1996-10-24
    • Nancy Anne GrecoStephen Edward Greco
    • Nancy Anne GrecoStephen Edward Greco
    • H01L21/3205H01L21/304H01L21/3105H01L21/00
    • H01L21/31053
    • According to the present invention, an improved method for planarizing the surface of a dielectric or metal layer in an integrated circuit manufacturing process is disclosed. The dielectric or metal layer to be planarized is selectively patterned and etched over different regions of the surface. The size, shape, density, and depth of the patterns are determined by the pattern factor of the integrated circuit structures underlying the layer to be planarized. Further, by using the pattern factor of the underlying structures to determine the density, size, depth and placement of the surface pattern, the overall planarization process can be improved. Other empirically determined factors, such as material strength, CMP slurry temperature, and pad pressure can also be used to further refine the CMP process. By varying the pattern over the entire surface of the layer to be planarized, the CMP material removal rate can be controlled to achieve a more planar surface.
    • 根据本发明,公开了一种用于在集成电路制造工艺中平坦化电介质或金属层的表面的改进方法。 要平坦化的介电层或金属层被选择性地图案化并蚀刻在表面的不同区域上。 图案的尺寸,形状,密度和深度由待平坦化层下面的集成电路结构的图案因子确定。 此外,通过使用下面的结构的图案因子来确定表面图案的密度,尺寸,深度和放置,可以提高整体平坦化处理。 还可以使用其他经验确定的因素,例如材料强度,CMP浆料温度和垫压力来进一步改进CMP工艺。 通过改变要平坦化的层的整个表面上的图案,可以控制CMP材料去除速率以实现更平坦的表面。