NEW RAM-BUS MEMORY SYSTEM WITH INTERCHIP OPTICAL INTERCONNECTION

A new optical RAM-bus (GRAM-bus) memory system has been proposed. The GRAM-bus memory has a number of optical interconnections to connect ma ny memory chips. Data transfer using the guided optical interconnectio ns is performed through the optical coupling flip-flop (OC-FF) circuit of the optical coupling sense amplifiers. The ORAM-bus memory test ch ips were fabricated using 2 mu m complementary metal-oxide-semiconduct or (CMOS) technology. The light-emitting diodes (LEDs) were successful ly bonded onto the silicon test chips using the newly developed microb onding technology. The optical writing operation for GRAM-bus memory w as demonstrated using the test chip.