Patent ID: 8497550

Claim:
A DRAM memory cell, comprising: a first finFET structure, having a U-shaped cross-section and comprising: a first fin; a second fin opposite to the first fin; a trench disposed between the first fin and the second fin; and a trench capacitor for storing charge; and a second finFET structure adjacent to the first finFET structure, the second finFET structure having a U-shaped cross section and comprising: a first fin, comprising: a source follower transistor; and an n-doped region above the source follower transistor; a second fin opposite to the first fin and comprising: an access transistor; a trench capacitor, for storing charge; a trench disposed between the first fin and the second fin of the second finFET structure; a write word line disposed in the trench; and a read word line disposed in the trench and stacked above the write word line; wherein when the read word line of the second finFET structure is fired high, parasitic coupling between the n-doped region of the first fin of the second finFET structure and the trench capacitor of the first finFET structure enables data to be read from the first finFET structure.