Fifth generation SPARC64 processor is developed for high-end unix servers. A semiconductor process used is 130nm CMOS PD SOI process. The processor runs at 1.35GHz clock and dissipates about SOW. A high reliability is required for the high-end server used for the enterprise and/or social infrastructures. Since a large server incorporates many processor chips, a reliability of an individual processor must be very high. On the other hand, an advancing semiconductor scaling is adversely affecting the reliable operation of the circuits. We have added error check circuitry to the logic circuits of the processor in addition to the on chip memory arrays to achieve high reliability under this circumstance. This is the world first use of the error detection and recovery technique on the logic circuits for the unix server processor.
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