Patent ID: 8916919
Filing Date: 2014-12-23
Classification: H01L

Abstract:
1. A metal capacitor structure comprising a plurality of line level structures and at least one via level structure, wherein said plurality of line level structures extends across a plurality of line levels that are numerically labeled with consecutive integers along a vertical direction from a substrate and wherein, at each line level, said plurality of line level structures comprises: a first line level structure comprising a first rectangular tab structure having a shape of a first rectangular parallelepiped and a first plurality of parallel metal lines protruding from, and adjoined to, a sidewall of said first rectangular tab structure; and a second line level structure comprising a second rectangular tab structure having a shape of a second rectangular parallelepiped and a second plurality of parallel metal lines protruding from, and adjoined to, a sidewall of said second rectangular tab structure, said sidewall of said second rectangular tab structure being parallel to said sidewall of said first rectangular tab structure, wherein said first plurality of parallel metal lines and said second plurality of parallel metal lines collectively constitute an interdigitated uniform pitch structure having a pitch in a direction that is perpendicular to a lengthwise direction of said first and second pluralities of parallel metal lines, and said first rectangular tab structure and said second rectangular tab structure do not protrude into a region between said sidewall of said first rectangular tab structure and said sidewall of said second rectangular tab structure, and each of said first rectangular tab structure and said second rectangular tab structure has a tab width, as measured between a pair of sidewalls of a corresponding rectangular tab structure along said lengthwise direction of said first and second pluralities of parallel metal lines, that is greater than 1 ½ times said pitch, wherein, across said plurality of line levels, a lengthwise direction of metal lines within an interdigitated uniform pitch structure in an even-numbered line level is perpendicular to a lengthwise direction of metal lines within another interdigitated uniform pitch structure in an odd-numbered line level, wherein said at least one via level structure comprises a first plurality of intra-line via structures and a second plurality of intra-line via structures that are located between an (x+1)-th line level and an x-th line level, wherein x is a positive integer, wherein parallel metal lines within said (x+1)-th line level and parallel metal lines within said x-th level extend in directions perpendicular to each other such that horizontal cross-sectional areas of said parallel metal lines within said (x+1)-th line level and said parallel metal lines within said x-th line level overlap and define a plurality of areal overlap regions, wherein each of said first plurality of intra-line via structures and said second plurality of intra-line via structures is located within one of said plurality of overlap regions, said first plurality of intra-line via structures provide vertically conductive paths between said first line level structures in said (x+1)-th line level and said x-th line level, said second plurality of intra-line via structures provide vertically additional conductive paths between said second line level structures in said (x+1)-th line level and said x-th line level, and said first plurality of intra-line via structures is electrically isolated from said second plurality of intra-line via structures, wherein each pair of vertically adjacent first rectangular tab structures is contacted by a plurality of first intra-tab via structures at a first rectangular corner region that is defined as an entire region at which horizontal cross-sectional areas of said pair of vertically adjacent first rectangular tab structures overlap in a top-down view, and each pair of vertically adjacent second rectangular tab structures is contacted by a plurality of second intra-tab via structure at a second rectangular corner region defined as an entire region at which horizontal cross-sectional areas of said pair of vertically adjacent second rectangular tab structures overlap in said top-down view.