Computer memory types

Volatile

DRAM, e.g. DDR SDRAM SRAM Upcoming T-RAM Z-RAM TTRAM Historical Delay line memory Selectron tube Williams tube

Non-volatile

ROM PROM EPROM EEPROM Flash memory Upcoming FeRAM MRAM CBRAM PRAM SONOS RRAM Racetrack memory NRAM Millipede Historical Drum memory Magnetic core memory Plated wire memory Bubble memory Twistor memory

T-RAM, short for "Thyristor RAM" or "thyristor random-access memory", 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, which exploits the electrical property known as negative differential resistance and is called Thin-Capacitively-Coupled-Thyristor^[1], is used to create memory cells capable of very high packing densities. Due to this, this memory is highly scalable, and already has a storage density that is several times higher than found in conventional six-transistor SRAM memory. It is expected the next generation of T-RAM memory to have the same density as DRAM.

It is assumed that this type of memory will be used in the next-generation processors by AMD, produced in 32nm and 22nm ^[2], replacing the previously licensed but unused Z-RAM technology.

[edit] References

[edit] External links

• T-RAM Semiconductor
• T-RAM Description
• EE Times: GlobalFoundries to apply thyristor-RAM at 32-nm node
• Semiconductor International: GlobalFoundries Outlines 22 nm Roadmap

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