Electrical characterization of megabit DRAMs. 11. Internal testing

For pt.I. see ibid., vol.8, no.3, p.36-43 (1991). Contactless tools for testing inside dynamic RAMs, including hot-spot detection, emission microscopy, scanning laser microscopy, and submicron electron beam testing, are described. Basic principles and experimental setups are described. The utility of the techniques is assessed     

Electrical characterization of megabit DRAMs. 1. External testing

An approach to the electrical characterization of dynamic RAMs in which chip design and DRAM process technology are verified and optimized concurrently is reported. Both parametric and functional tests were performed. The authors describe an information and scheduling system for analysis and testing that handles the required electrical measuring data from the testers. It is shown how data analysis supports the interpretations by data correlations on a real statistical basis. The short learning cycle required by this approach was obtained by ensuring the smooth cooperation of all those involved in the overall analysis