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Laser Trimmed Dimensions on Optical Disk Photopolymer

IP.com Disclosure Number: IPCOM000037161D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29

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Eckhoff, H Polleys, RW Smith, DR [+details]


Precisely controlled radial dimensions and edge geometry on optical disks with photopolymer (2P) on glass have been obtained with the use of excimer lasers. Inner and outer radii, as well as edge shape (taper), are critical for the 2P layer on an optical disk. The dimensional control is required to maximize available disk space for storage capacity, while a tapered edge is required to obtain a hermetic environmental seal for the corrosion-sensitive magneto-optic layer.