A test report is necessary to show the compliance between custom description and our final wafers data. We will test the wafer characerization by equipment before shipment, testing surface roughness by atomic force microscope, type by Roman spectra instrument, resistivity by non-contact resistivity testing equipment,micropipe density by polarizing microscope, orientation by X-ray Orientator etc. if the wafers meet the requirement, we will clean and pack them in 100 class clean room, if the wafers do not match the custom spec, we will take it off.
Testing Project: XRD Rocking Curves
The half-height full width (FWHM) is an expression of the range of functions given by the difference between two extreme values of the independent variable equal to half of its maximum. In other words, it is the width of the spectral curve measured between those points on the Y-axis, which is half the maximum amplitude.
Below are examples of XRD Rocking Curves of GaN Material:
XRD Rocking Curves of GaN Material