TYM system: an integrated tool for inherent line yield improvements for entire fab

Abstract

Total line yield management (TYM) is a new concept that analyzes the wafer loss all over the fab and transforms the data elements to an effective knowledge base for smart uses. TYM system enables dramatic cost saving. The TYM system is the effective way for achieving 99% factory line yield. A factory with excellent performance achieves line yield results of approx. 94%. A comparison between total line yield management (TYM) verses the traditional line yield management emphasis the huge enhancement. In terms of direct cost that was wasted in 300-mm, the contribution could be more than $19.322 million. In terms of marketing loss the penalty is much higher. Excellent fabs will save money and less effective fabs the line yield improvement will help survivability.