Variable Capacitor Testing via Forward-Bias Light and Thermal Detection

The patent segments the testing process by electrically isolating individual variable capacitors using switch circuits. Each capacitor can be tested independently through its dedicated switch, allowing failure location to be identified at the component level rather than testing the entire array as a single unit. This segmentation transforms the undifferentiated high-difficulty test into multiple simple, locatable component tests.

The patent performs preliminary testing of individual variable capacitors before final device assembly using the switch circuit array. By testing each capacitor independently in its dedicated circuit region before bonding to the final substrate, failures are identified and located early in the manufacturing process. This preliminary action prevents the need to disassemble finished devices for failure location, greatly improving ease of repair.

The patent merges the testing function into the existing manufacturing process by integrating switch circuits and test signal generation into the standard production flow. The test process uses the same bonding equipment and substrate structures, combining multiple functions (bonding, switching, signaling, and measurement) into a unified manufacturing system rather than adding separate complex test equipment.