Sony Corporation

Sony Dadc Corporation

Sony Disc & Digital Solutions Inc.

Kabushiki Kaisha Kobe Seiko Sho

Sony Chemical & Information Device Corporation

Kobelco Research Institute, Inc.

Naoki Okawa

Jun Nakano

Tetsuhiro Sakamoto

Yuki Tauchi

Katsuhisa Aratani

Junichi Nakai

Hidetoshi Watanabe

Shintaro Tanaka

Kozaburo Hayashi

Hitoshi Matsuzaki

Kiichiro Oguni

Satoshi Yanagida

Yukie Suzuki

Takehide Endo

Provided is a fusing method of a substrate layer including: treating a joining surface of a substrate layer formed from a resin using an organic solvent having solubility with respect to the resin; and heating the treated substrate layer at less than a glass transition temperature or a softening point temperature of the resin and crimping the heated substrate layer.

Fusing method of substrate layer, manufacturing method of microfluidic chip and fusing apparatus of substrate layer

A method of producing a recording medium includes preparing a substrate of the recording medium, forming a first face recording layer at a first face side of the substrate, forming a first face protection layer for protecting the first face recording layer on the first face recording layer, forming a second face constituting whole or a part of a layer configuration at a second face side of the substrate,

Method of producing recording medium, and recording medium

[Object] To provide a durable read-only optical recording medium having less variances in characteristics of a metal reflective film due to a temporal change. [Solving Means] Provided is a read-only optical recording medium () including: a substrate (); an information recording surface onto which information is recorded by combining pits (P) and lands (L); and a metal reflective film () that is provided in contact with the information recording surface and represented by AlXZ, where x and z each represent an atomic %, X is constituted of an element including at least Ti, Z is constituted of an element including at least Fe, x is 1.0 to 3.0, and z is 0.05 to 1.0.

Read-only optical recording medium

A pirated optical recording medium may be determined which is produced by physically transferring a shape of pits and lands formed on a substrate of an optical recording medium. The optical recording medium is provided with excellent weatherability and long-term storage reliability. A reflective film formed of an Ag alloy film of AgXCu, where X is at least one element among Ti, W, Ta, V, Mo, Nb and Zr, is formed on a substrate on which main data is recorded with a combination of pits and lands. A mark may be formed so that a reproduction signal level in the recorded mark of auxiliary data write once recorded on the reflective film is increased, and a reproduction signal level is decreased in an optical recording medium prepared by physically transferring the surface shape of the pits and lands of the substrate. A pirated optical recording medium may be determined in this manner.

Optical recording medium having write once metal reflective film

A solvent-free photocurable resin composition is provided which can be applied to the surface of optical discs or the like to form a highly transparent protective film that can stably adhere to the surface and effectively protect the surface from scratches. The solvent-free photocurable resin composition contains a urethane(meth)acrylate oligomer, a trifunctional (meth)acrylic acid ester monomer, a photopolymerization initiator, and a dilution monomer. The dilution monomer contains a fluorine-based (meth)acrylic acid ester monomer having three or more fluorine atoms and a monofunctional or difunctional (meth)acrylic acid ester monomer in amounts of from 10 to 40 wt% and from 10 to 30 wt%, respectively.

Solvent-free photocurable resin composition for protective film

The invention relates to an Ag-based alloy sputtering target including at least one element selected from the group consisting of Ti, V, W, Nb, Zr, Ta, Cr, Mo, Mn, Fe, Co, Ni, Cu, Al, and Si in a total amount of 1 to 15% by weight, in which the Ag-based alloy sputtering target has an arithmetic mean roughness (Ra) of 2 &#x3bc;m or more and a maximum height (Rz) of 20 &#x3bc;m or more at a sputtering surface thereof.

AG-based alloy sputtering target

According to the present invention, there is provided an optical recording medium including at least an information recording layer and a reflective film in which the reflective film is comprised of an AgCu alloy thin film containing Cu the content of which is greater than or equal to 3.0 [atomic %] and less than or equal to 6.5 [atomic %]. Thus, the optical recording medium can be made inexpensive and weather resistance of the optical recording medium can be improved, thereby making it possible to avoid characteristics of the optical recording medium from being deteriorated even after it has been stored for a long time.

Growing community of inventors

Tokyo, Japan

Naoki Okawa