Shockley diode
| Component type | Active |
|---|---|
| First produced | 1950s |
| First produced by | Shockley Semiconductor Laboratory |
| Pin names | Anode and cathode |
| Electronic symbol | |
The Shockley diode (named after William Shockley) is a four-layer semiconductor diode. It is a PNPN diode with alternating layers of P-type and N-type material. It is equivalent to a thyristor with a disconnected gate. Shockley diodes were manufactured and marketed by Shockley Semiconductor Laboratory in the late 1950s. The Shockley diode has a negative resistance characteristic. It was largely superseded by the DIAC.