Eli5: How is the same size chip now able to carry so much more memory?

Question

Eli5: How is the same size chip now able to carry so much more memory?

In: 6

Answer 1

They’re able to make the circuits much smaller. And now they’re stacking them in 3D. So before you had maybe a 10×10 grid, now you have a 20x20x20 cube.