Patent ID: 8004289

Claim:
A structure, comprising: (a) a first semiconductor wafer including a first capacitive coupling structure; and (b) a second semiconductor wafer including a second capacitive coupling structure, wherein the first and second semiconductor wafers are in direct physical contact with each other via a common surface, wherein if the first and second semiconductor wafers are moved with respect to each other by a first displacement distance of 1 nm in a first direction while the first and second semiconductor wafers are in direct physical contact with each other via the common surface, then a change of at least 10 −18 F in capacitance of a first capacitor comprising the first and second capacitive coupling structures results, wherein the first direction is essentially parallel to the common surface, wherein the first capacitive coupling structure comprises a first doped semiconductor region and a first silicide region, wherein the second capacitive coupling structure comprises a second doped semiconductor region and a second silicide region, wherein the first capacitive coupling structure comprises N first capacitive coupling fingers, N being an integer greater than 1, wherein the second capacitive coupling structure comprises N second capacitive coupling fingers, wherein the N first capacitive coupling fingers are aligned one-to-one to the N second capacitive coupling fingers, wherein the N first capacitive coupling fingers and the N second capacitive coupling fingers have a same first finger width and a same first finger spacing, wherein the first semiconductor wafer further comprises a fifth capacitive coupling structure that comprises M third capacitive coupling fingers, M being an integer greater than 1, wherein the second semiconductor wafer further comprises a sixth capacitive coupling structure that comprises M fourth capacitive coupling fingers, wherein the M third capacitive coupling fingers are aligned one-to-one to the M fourth capacitive coupling fingers, wherein the M third capacitive coupling fingers and the M fourth capacitive coupling fingers have a same second finger width and a same second finger spacing, wherein the first finger width is ten times the second finger width, and wherein the first finger spacing is ten times the second finger spacing.