Patent ID: 8976506
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A metal-on-metal capacitor cell design comprising a plurality of metal layers, each metal layer comprising a design comprising: a first set of fingers and a second set of fingers, wherein the first set of fingers and the second set of fingers are interdigitated; a first peripheral finger and a second peripheral finger which is perpendicular to the first peripheral finger; an angled feedline between the first peripheral finger and the second peripheral finger; wherein the first set of fingers comprises a first subset of fingers directly connected to the angled feed line and extending towards the first peripheral finger and a second subset of fingers directly connected to the angled feedline and extending towards the second peripheral finger, wherein the first subset of fingers and the second subset of fingers encompass all fingers directly connected to the angled feedline in a metal layer, wherein fingers in the first subset are substantially perpendicular to fingers in the second subset, wherein the second set of fingers comprises a first subset of fingers connected to the first peripheral finger and extending towards the angled feedline and a second subset of fingers connected to the second peripheral finger and extending towards the angled feedline, wherein fingers in the first subset are substantially perpendicular to fingers in the second subset, wherein each metal layer in the cell design is symmetrical about a line through the angled feedline, and wherein the design is rotated by 180° between adjacent metal layers, said adjacent layers being interconnected with a plurality of vias, said vias only being located in fingers at a periphery of the cell.