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Browse Prior Art Database

Improved Polymer Films for Optical Recording

IP.com Disclosure Number: IPCOM000045364D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Ahn, KY: AUTHOR [+4]

Abstract

Optical recording films are described which are fabricated by dry plasma deposition of alpha-methyl styrene or isobutylene with SO(2) to produce thermally unzippable polymer films.

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Improved Polymer Films for Optical Recording

Optical recording films are described which are fabricated by dry plasma deposition of alpha-methyl styrene or isobutylene with SO(2) to produce thermally unzippable polymer films.

An all-dry plasma deposition process is used to produce high molecular weight films by co-deposition of selective monomers to produce unique copolymers for optical recording. To make a polymer film sensitive to laser (optical) or thermal energy, SO(2) is co-deposited with a monomer such as alpha-methyl styrene or isobutylene to produce copolymers, such as follows:

These polymers will exhibit unzipping characteristics which will revert the polymer into its volatile monomer species upon irradiation with thermal energy. ultraviolet, or electron-beam radiation. Also, since these polymers can be selectively crosslinked during the plasma deposition process, additional stability can be added to the films. Furthermore, using the plasma deposition technique isobutylene can be co-deposited with both alpha-methyl styrene and with SO(2) to obtain polymer systems which cannot be synthesized by conventional polymerization techniques. An idealized example is shown below.

These polymers will have unique thermal unzipping properties which can be tailored to the optical storage materials system by optimizing the ratios of feedstock monomers used in plasma polymerizing the polymers

In a typical application in optical information storage on a disk, the polymer ...