Magneto-Optical Disk By Contact Printing Method

Inui, T.; Hirokane, Junji; Ohta, Kenji; Yamaoka, H.; Ishikawa, Toshio

doi:10.1117/12.952763

Cited by 5 publications

(1 citation statement)

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“…Similar effects have been seen in other polymer and onium salt mixtures which are comprised of materials with widely SPIE Vol. 1316 Optical Data Storage (1990) / 181 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/21/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx different polarities.8 Two alternative onium salts were evaluated in formulations of 1 :9 t-BOCstyrene/styrene, (2) p-methylphenyl, diphenylsuiphonium triflate and (3) di-(p-t-butylphenyl)phenylsulphonium hexafluoroantimonate. Onium salt (2) was slightly worse than the triphenylsuiphonium hexaflouorantimonate (1) initially used.…”

Section: Film Shrinkage Measurementsmentioning

confidence: 99%

<title>Generation of optical disk servo patterns by lithographic imaging of photodeformable polymers</title>

et al. 1990

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A novel non-contact method of forming groove servo patterns on optical disk substrates has been demonstrated. The servo forming layer consists of a copolymer of (p-t-butyloxycarbonyloxy)styrene and styrenc formulated with an onium salt which photogenerates acidic species upon exposure to deep UV radiation. If the film is heated after exposure to light the photogeneràted acid cleaves the p-t-butyloxycarbonyl ("t-BOC") group resulting in a thickness change in the regions exposed to radiation. Glass substrates coated with this formulation were exposed with an appropriate mask to deep CV light and the image developed by a post exposure bake of 2 minutes at 90°C. A magneto-optic trilayer consisting of 710 A Zr02/800 A TbFeCo/710 A Zr02 was deposited onto the polymer surface. The complete structure has sufficient track error signal level to be trackable on a precision optical disk test stand with the TES servo loop closed and has a CNR of 53 dB, comparable to the same MO composition deposited on injection molded grooved polycarbonate substrates.

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Section: Film Shrinkage Measurementsmentioning

confidence: 99%