Memory Cross-Section

This slice through a modern memory chip shows how the storage for bits and the wires that connect them stack up in layer upon layer of circuits etched at the fabulously fine pitch of 22 nanometers.

Looking a little closer, we can see the wordline transistors on the tri-gate fin, with passing wordlines at the end of each fin. Two capacitors contact each fin, and the bitline contact is in the centre of the fin. chipworks

The electrical storage elements that do the remembering are marked as capacitors.

The criss-cross of wires that address individual capacitors are labeled wordline and bitline.

Other circuit wires stack up in layers like the worst clover-leaf you've ever seen. These are labeled by their level number, M1, M2, etc. M stands for metal.