Intel Processor Micro-architecture Code Names

It follows a tick-tock naming convention.

Tock - New micro-architecture while keeping the process technology the same.
Tick  - Improving on the previous micro-architecture using process technology. (45nm etc.)


Nehalem (tock)         45nm
Westmere (tick)        32nm

Sandy Bridge (tock)  32 nm
Ivy Bridge (tick)        22 nm

Haswell (tock)            22nm
Broadwell (tick)          14nm



source - Wikipedia Articles