High-throughput critical dimensions uniformity (CDU) measurement of two-dimensional (2D) structures using scanning electron microscope (SEM) systems
2011
In this paper, we tested a novel methodology of measuring critical dimension (CD) uniformity, or CDU, with electron
beam (e-beam) hotspot inspection and measurement systems developed by Hermes Microvision, Inc. (HMI). The
systems were used to take images of two-dimensional (2D) array patterns and measure CDU values in a custom
designated fashion. Because this methodology combined imaging of scanning micro scope (SEM) and CD value
averaging over a large array pattern of optical CD, or OCD, it can measure CDU of 2D arrays with high accuracy, high
repeatability and high throughput.
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