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    • 2. 发明申请
    • SELF-ALIGNED VIA PATTERNING WITH MULTI-COLORED PHOTOBUCKETS FOR BACK END OF LINE (BEOL) INTERCONNECTS
    • 自动对准通过多行彩色胶片的背面(BEOL)互连
    • US20150255284A1
    • 2015-09-10
    • US14720821
    • 2015-05-24
    • Robert L. BristolJames M. BlackwellAlan M. MyersKanwal Jit Singh
    • Robert L. BristolJames M. BlackwellAlan M. MyersKanwal Jit Singh
    • H01L21/033H01L23/532H01L23/522H01L21/768H01L23/528
    • H01L21/0338H01L21/0332H01L21/0335H01L21/0337H01L21/31144H01L21/76801H01L21/76808H01L21/76811H01L21/76813H01L21/76816H01L21/76897H01L23/5226H01L23/528H01L23/53295H01L2924/0002H01L2924/00
    • Self-aligned via patterning with multi-colored photobuckets for back end of line (BEOL) interconnects is described. In an example, an interconnect structure for an integrated circuit includes a first layer of the interconnect structure disposed above a substrate, the first layer including a first grating of alternating metal lines and dielectric lines in a first direction. The dielectric lines have an uppermost surface higher than an uppermost surface of the metal lines. A second layer of the interconnect structure is disposed above the first layer of the interconnect structure, the second layer including a second grating of alternating metal lines and dielectric lines in a second direction, perpendicular to the first direction. The dielectric lines have a lowermost surface lower than a lowermost surface of the metal lines of the second grating. The dielectric lines of the second grating overlap and contact, but are distinct from, the dielectric lines of the first grating. First and second dielectric regions are disposed between the metal lines of the first grating and the metal lines of the second grating, and in a same plane as upper portions of the dielectric lines of the first grating and lower portions of the dielectric lines of the second grating. The first dielectric region is composed of a first cross-linked photolyzable material, and the second dielectric region is composed of a second, different, cross-linked photolyzable material.
    • 描述了通过用于后端(BEOL)互连的多色photobuckets图案化的自对准。 在一个示例中,用于集成电路的互连结构包括布置在衬底上方的互连结构的第一层,第一层包括在第一方向上交替的金属线和介质线的第一光栅。 介质线具有高于金属线的最上表面的最上表面。 所述互连结构的第二层设置在所述互连结构的所述第一层上方,所述第二层包括垂直于所述第一方向的第二方向的交替金属线和介质线的第二光栅。 介质线具有比第二光栅的金属线的最下表面低的最低表面。 第二光栅的介质线与第一光栅的介质线重叠并接触,但不同。 第一和第二电介质区域设置在第一光栅的金属线和第二光栅的金属线之间,并且在与第一光栅的介电线的上部和第二栅的介电线的下部相同的平面中 光栅。 第一电介质区域由第一交联光可光化材料组成,第二电介质区域由第二不同的交联光可光化材料组成。