G PHYSICS
G11 INFORMATION STORAGE
G11C STATIC STORES
11/00 Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
G11C11/21 using electric elements
G11C11/34 using semiconductor devices
G11C11/40 using transistors
G11C11/401 forming cells needing refreshing or charge regeneration, i.e. dynamic cells