Electronics - Semiconductor Principles - Discussion

The first solid state device (cat's whisker) was INVENTED in 1906 not manufactured, as the question is asking when is the first solid state device manufactured (Manufacture means producing something on a large scale). Around 1960's was the time that they really started to manufacture in big quantities solid state electronics, years after the invention of the transistors.

1960 is the exact answer. I agree with the given answer.

1906 is the exact answer.

The first solid state device were manufactured in 1906.

What was the cat's whisker crystal detector in a pre second world radio if not a solid state device? Your not confusing integrated circuits with solid state devices are you?

What are the solid state devices available?