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AssigneeSilicon Valley Bank
InventorsBrian S. Medower, Michael F. Braitberg, David H. Davies
Estimating the term…
A digital optical information disk contains content and/or non-content information on both sides of a single substrate produced by a process that embosses the surfaces of both sides substantially simultaneously. Simultaneous molding substantially eliminates the need for lamination when two or more data layers are to be provided. Preferably, the disk is relatively small, such as less than 50 mm in diameter and can replicate marks or features with a z-dimension magnitude of about 80 nm or more. The disk remains within a specified opto-mechanical range of an optical transducer and has little, if any, non-planarity (warp) or other distortion. The disk can be used for reading pre-written or mastered content, e.g., in a user's device, and/or can include information or features that permits or supports utility functions, allowing the user to record data thereon such as tracking, sector, location, timing, synchronization features or combinations thereof. Preferably, the disk is formed by an injection-only technique, although it is possible to provide suitable disks by an injection-compression technique as well.
A method for producing a digital optical disk which has first and second sides, the method comprising:
A digital optical information bearing disk comprising:
An information recording disk having embossed replicated digital optical information on both sides of a double-side molded substrate in the absence of laminating a substrate portion having said first side to a substrate portion having said second side.
29 A disk, as claimed in claim 23, wherein said disk has a diameter less than 50 mm.
A disk having embossed replicated digital optical information on both sides wherein said disk is produced by a process of injection molding both sides substantially simultaneously.
A method of fabricating a disk comprising:
Dependencies are inferred from the claim text.