Advanced Monitoring Method for Copper Interconnect Process ISSM Paper: PC-O-202
2007
Stabilizing copper interconnect process is the key for yield and reliability improvement. Forming adequate grains in a copper film is so important to have the stable process, but there is no proper method of monitoring grains in a copper film. We introduce an advanced method of monitoring grain size using scattering light that we call the micro-haze method. We verified the effectiveness of the method by the experimen- tal design and concluded that the method makes it possible to monitor grains in a copper film.
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