Sony Corporation

Toshitsugu Ono

Kazuhito Hatta

Tetsuhiro Sakamoto

Hirofumi Kondo

Yuji Aoyama

Tomohiro Sato

An optical recording medium in which deposition of impurities or damage to a surface of the medium illuminated by the light for signal recording and/or reproduction is to be prevented from occurring. An amine salt compound of perfluoropolyether having terminal carboxylic groups, represented by the chemical formulas (1) and/or (2):R&#x2014;COONHRRR&#x2003;&#x2003;(formula 1)RRRNHCO&#x2014;R&#x2014;COONHRRR&#x2003;&#x2003;(formula 2)where Rdenotes a perfluoropolyether group and R, Rand Rdenote hydrogen or a hydrocarbon group, is held on the surface side illuminated by light.

Optical recording medium

Magnetic recording medium and manufacturing method thereof

An optical recording medium incorporating a supporting body; a recording portion which is formed on either main surface of the supporting body and on which a signal is recorded; and a light permeable layer formed on the recording portion, wherein light is applied from a position adjacent to the light permeable layer to record/reproduce a signal, and carboxylic acid amine salt expressed by general formula (1) and/or general formula (2) is held on the surface which is irradiated with light

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Miyagi, Japan

Toshitsugu Ono