While it's not something I'd recommend, these are solid-state devices and can be surprisingly robust.

However, they have been largely supplanted by solid-state devices such as the transistor.

The solid-state device came into its own with the invention of the transistor in 1947.

The tester has all these features and can check solid-state devices in and out of circuit.

These things were solid-state devices, no moving parts.

One of the first solid-state devices was a crystal radio.

It was the first computer to do all of its logic with solid-state devices.

Every solid-state device has a small voltage drop across it.

The transistor, invented in 1947, was the first solid-state device to come into commercial use.

The development of alternating current and solid-state devices has rendered it obsolete.