Reflective layer sputtering target for forming and optical recording medium with the reflective layer, a reflective layer

摘要

(1), and an optical recording medium has (2), the reflective layer recording layer laminated thereon (3), the protective layer (4) substrate. Reflective layer (3), and Cu of 99.7 to 73.0% by weight as the main component, Ag and 0.2 to 18.0 wt%, and a Ti of 0.1 to 9.0 wt% It is an alloy thin film made. Thickness of the reflective layer is 50nm~150nm. It has an improved corrosion resistance, an optical recording medium comprising a (3) The reflective layer is to maintain high reflectance. Target for forming a (3) the reflective layer is also provided.