Into the Blu

New PTM processes for Blu-ray mastering and the ´Art of Coating´ within the limits of BD specs are still demanding tasks for every manufacturer. Focussed on 3rd generation media dr. schwab Inspection Technology supports the industry with new features and enhancements for process control and optimization, including inline environmental control and climate chamber test.

PTM Mastering

As one of the most relevant enhancements to the diffraction order measurement system DOMS^XE-blu it offers now the integrated functionality to fully control the phase transition mastering (PTM) processes for Blu-ray discs. A high-precision spectrometer measures the thickness of phase-change layers for all types of PTM Mastering, two layers at a time, on Si-wafer and glass-masters.

Inline CLT Measurement

The spin coating process is very sensitive to changes of temperature. This is of particular importance in case of Blu-ray Disc cover layer application due to its thickness with tight variation limits. dr.schwab offers a solution for in-line layer thickness measurement directly after coating process with immediate feedback to the production line. This allows to quickly and automatically adapt process parameters in a closed loop process. Measurement is possible while the disc is moved from one station to the next by the disc handling.

Particle Counter & Temperature Sensor

Inline measurement and monitoring of the ambient air are an essential enhancement to control and optimize the production process. Measuring size and count of particles as well as temperature and humidity inside of production lines is made easy. Integrated in our Trend and Analysis software this offers the ability to monitor production yield and environmental conditions.

Environmental Tilt Measurement

The asymmetric layer structure makes Blu-ray Discs highly sensitive to environmental changes. Tight specifications require guaranteed accuracy under all climatic conditions. Therefore dr. schwab IT has developed a special off-line system for Tilt measurement inside a climate chamber. The system supports horizontal and vertical disc position and is available as one- or three-chuck version.