Thyristor RAM ('T-RAM) is a new type of DRAM computer memory invented and developed by T-RAM Semiconductor, which departs from the usual designs of memory cells, combining the strengths of the DRAM and SRAM: high speed and high volume. This technology exploits the electrical property known as negative differential resistance and is called thin capacitively-coupled thyristor used to create memory cells capable of very high packing densities. This memory is highly scalable and already has a storage density that is several times higher than found in conventional six-transistor SRAM memory