Patent ID: 9285404
Filing Date: 2016-03-15
CPC Classification: B81B,B81C,G01L,G01R

Claim Text:
1. A test structure comprising: a first capacitor structure having a first conductor plate, a second conductor plate, and an electrical insulator layer interposed between and in contact with each of said first and said second conductor plates, said first capacitor structure producing a first capacitance; and a second capacitor structure having a third conductor plate and a fourth conductor plate spaced apart by a cavity, said second capacitor structure producing a second capacitance, wherein a ratio of said second capacitance to said first capacitance is utilized to estimate a critical dimension of said cavity, wherein said first and second capacitor structures are formed on a substrate upon which a pressure sensor is formed, said pressure sensor includes a sense cell having a sense cavity, said sense cavity is characterized by a width, said critical dimension is proportional to said width of said sense cavity, and said critical dimension is utilized to estimate a sensitivity of said pressure sensor.