Patent ID: 9019686
Filing Date: 2015-04-28
Classification: H01G,H01L

Abstract:
1. A method of tuning capacitor devices fabricated on a wafer substrate, each capacitor device comprising: a first plate fabricated on the substrate, a dielectric fabricated on the first plate, a second plate fabricated on the dielectric so that the dielectric is located between the first and second plates, the second plate including a plurality of subparts, each of the plurality of subparts including a first end and a second end and being connected to each subpart adjacent to the subpart at the first and second ends by a corresponding pair of first and second trimming connections located, respectively, at the first and second ends of the subpart, such that the plurality of subparts are connected together by a plurality of corresponding pairs of first and second trimming connections, each of the subparts having predefined dimensions so as to provide a tuning range for the capacitor's capacitance value, the method comprising the steps of: providing a laser device that emits a laser beam for cutting and thereby trimming subparts of the second plate, registering the laser beam to the capacitor device on the wafer substrate to be tuned, moving the laser beam along the capacitor device on an open-loop basis according to registration marks inserted on the wafer substrate and thereby cutting at least one corresponding pair of first and second trimming connections, whereby the capacitor's capacitance value is tuned to a predetermined value by the at least one of the corresponding pairs of first and second trimming connections being cut by the laser beam.