What do microchip transistors look like physically and how are they wired?

Question

I have watched several youtube videos on how transistors work but all the explanations use a classic resin coated transistor with three prongs you can solder to you project . What I just can’t seem to grasp is how the that can be translated to a solid silicon disk.

Physically, how are the three layers separated (npn/pnp); and more importantly, how do you wire up a billion of them?

In: 1

Answer 1

The term you’re looking for is **integrated circuit**. YouTube should have good stuff when you search that.

Briefly, the silicon is treated with different chemicals or etched away to create small transistors.