A 1Mb CMOS DRAM with design-for-test functions

A mask programmable 1Mb CMOS DRAM family has been developed featuring design-for-test functions which allow the memory to reconfigured as an 8b parallel 128Kb organization to reduce test time. With a 1μm twin-well CMOS technology and a contactless trench cell, the chip measures 49mm
²
.