High Density Static RAM for In-Situ Bulk Data Storage

Static CMOS Random Access Memory (RAM) can be packaged to achieve a density of 1 MByte per running inch of 6" I.D. pressure case, using 64 kbit memory devices. A bulk data storage subsystem using this technique, including 1 MByte/sec CPU interface, backup power system, and memory array of up to 16 MBytes, was constructed and tested in an operational microstructure profiler. Results are discussed, and the general advantages and disadvantages of this data storage method are considered.