WO/2005/101397 is referenced by 2 patents.

The invention relates to a master substrate, a method for making a high­density relief structure, and optical discs replicated with the high-density relief structure, the master substrate comprising a substrate layer (10) and a recording stack deposited on the substrate layer, the recording stack comprising: - an information layer (12), - an interface layer (11) sandwiched between said information layer and the substrate, said information layer (12) comprising a growth-dominated phase-change material for forming marks and spaces representing an encoded data pattern, wherein said recording material is an alloy comprising at least two materials of the group of materials containing Ge, Sb, Te, In, Se, Bi, Ag, Ga, Sn, Pb, As. A very high-density relief structure is achieved.

Title
Optical master substrate and method to manufacture high-density relief structure
Application Number
PCT/IB2005/051160
Publication Number
2005/101397
Application Date
April 8, 2005
Publication Date
October 27, 2005
Inventor
Loch Rolf A
Meinders Erwin R
Agent
UITTENBOGAARD Frank
Assignee
Loch Rolf A
Meinders Erwin R
Koninklijke Philips Electronics
IPC
G11B 07/26
G11B 07/24
G11B 07/0045
View Original Source