Multi-layer high-K metal gate (HKMG) film stacks require the adoption of a feedforward process.
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Ibaraki, Japan ...
Ellipsometry and reflectometry are optical measurement techniques used for surface analysis and thin-film characterization. 1 Both methods rely on light reflection but differ in their approach.