An impedance matching device includes a variable capacitor constituted by a non-linear dielectric thin film and an upper electrode disposed on a lower electrode formed on a substrate. The non-linear dielectric thin film is formed by a deposition, screen-printing, electroplating, or other technique, and...http://www.google.fr/patents/US6100773?utm_source=gb-gplus-shareBrevet US6100773 - Impedance matching device
