257 / | HD | ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES) |
414 | DF | RESPONSIVE TO NON-ELECTRICAL SIGNAL (E.G., CHEMICAL, STRESS, LIGHT, OR MAGNETIC FIELD SENSORS) {4} |
415 | .~ Physical deformation {3} | |
416 | DF | .~.~> Acoustic wave |
417 | DF | .~.~> Strain sensors {1} |
420 | DF | .~.~> Means to reduce sensitivity to physical deformation |