DPM Reduction on Dual-Port Caches
نویسندگان
چکیده
This paper presents two linear tests for unique faults in dual-port SRAMs: a single-addressing tests (March s2PF-), and a double-addressing test (March d2PF-). The faults for which the tests are designed are developed using defect injection and circuit simulation of all possible resistive defects at the electrical level. An analytical as well as an industrial evaluation of the two tests, together with other used dual-port tests will be presented. Although predicted by IFA, the production Defect per Million (DPM) screening of March s2PFand March d2PFon two different designs was surprising. The DPM was measured at 680 for one layout and at 141 for the other one. This calls for the necessity of considering March s2PFand March d2PF-, or leaving substantial DPM on table.
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