High-ratio-accuracy capacitor geometries for integrated...

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H - Electricity

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356/25

H01L 27/00 (2006.01) H01G 4/30 (2006.01) H01G 4/38 (2006.01)

Patent

CA 1121915

16 HIGH-RATIO-ACCURACY CAPACITOR GEOMETRIES FOR INTEGRATED CIRCUITS Abstract of the Disclosure A number of known circuit configurations require high-ratio-accuracy capacitors. Maintaining such ratios during the various processing steps involved in fabricating the configurations in integrated-circuit form has been found to be difficult. In accordance with this invention, ratio capacitors are made in integrated-circuit form utilizing a unique geometry. In one specific embodiment, a so-called H-section geometry that is largely insensitive to processing variations is utilized to form the capacitors. In this way, high-yield low-parasitic precisely matched pairs of ratio capacitors are achieved.

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