Interdigitated capacitors

same as any other capacitor
basic model two plates, area A, charge q, separation d, dielectric k, etc

then there's another one in series
and another in series etc

http://www.avx.com/products/ceramic-...ted-capacitor/
look at the interdigitated capacitor datasheet

literature.cdn.keysight.com/litweb/pdf/5989-8912EN.pdf