We have used gold with non-ablative hole formation mechanism for our recording media and have developed a process for optimization. The materials are highly sensitive, with long archival life and are overcoat compatible. The optical efficiency of the multiple layer recording structure can be optimized by simple optical monitoring. Uniformity of 14" planar disk coating can be achieved with proper masking technique.
"New Media Development At Burroughs: Material And Coating", Proc. SPIE 0382, Optical Data Storage, (1 January 1983); doi: 10.1117/12.970193; https://doi.org/10.1117/12.970193