Improving semiconductor manufacturing yields by using Raman spectroscopic analysis

In order to implement effective countermeasures to improve yields, it is essential to analyze particles, clarify their material and determine their source in a short period of time. However, it took time to determine the source of particles using conventional particle analysis methods such as EDX and FT-IR, due to shortcomings arising from their measurement principles. Raman spectroscopic analysis is a method for analyzing particles which compensates for the insufficiencies of conventional analysis methods, so there is possibility that it will enable the determination of particle sources in a shorter period of time. We selected four types of 64 M D-RAM production equipment where particles originating from that manufacturing equipment were considered to be reducing yields.