| 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} |
| 428 | DF | .~ Electromagnetic or particle radiation {2} |
| 429 | | .~.~ Charged or elementary particles {1} |
| 430 | DF | .~.~.~> With active region having effective impurity concentration less than 1012 atoms/cm3 |