| 257 / | HD | ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES) |
| 213 | DF | FIELD EFFECT DEVICE {6} |
| 256 | DF | .~ Junction field effect transistor (unipolar transistor) {15} |
| 280 | DF | .~.~ With Schottky gate {3} |
| 282 | ![]() | .~.~.~ Gate closely aligned to source region {1} |
| 283 | DF | .~.~.~.~> With groove or overhang for alignment |