A semiconductor structure includes a substrate having a frontside and a backside; a static random-access memory (SRAM) circuit having SRAM bit cells formed on the frontside of the substrate, wherein each of the SRAM bit cells including two inverters cross-coupled together, and a first and second pass gates coupled to the two inverters; a first bit-line disposed on the frontside of the substrate and connected to the first pass gate; and a second bit-line disposed on the backside of the substrate and connected to the second pass gate.