The present technology is generally related to a filter assembly. The filter assembly has a first layer has a base layer defining a first perimeter region and a region central to the first perimeter region. A first adhesive is disposed on a first surface of the first layer substantially within the central region, and first adsorbent beads are coupled to the first adhesive. A second layer has a first sheet of filter material having a second perimeter region, wherein the first perimeter region and the second perimeter region are bonded. A third layer has a second sheet of filter material having a third perimeter region, wherein the first perimeter region and the third perimeter region are bonded. The base layer, second layer, and third layer are substantially coextensive.

An interconnected corrugated carbon-based network comprising a plurality of expanded and interconnected carbon layers is disclosed. In one embodiment, each of the expanded and interconnected carbon layers is made up of at least one corrugated carbon sheet that is one atom thick. In another embodiment, each of the expanded and interconnected carbon layers is made up of a plurality of corrugated carbon sheets that are each one atom thick. The interconnected corrugated carbon-based network is characterized by a high surface area with highly tunable electrical conductivity and electrochemical properties.

A method for manufacturing a substrate includes processing a side face of a laminate that includes substrates and a sheet-shaped spacer disposed between adjacent substrates. The processing of the side face includes bringing the laminate into a pressed state, first side face processing for processing a side face of the laminate in the pressed state, releasing the laminate from the pressed state after the first side face processing, intermediate processing for performing one of dividing the laminate released from the pressed state into two or more laminates, combining the laminate released from the pressed state with another laminate in a stacking direction, and leaving the laminate released from the pressed state as it is, bringing the laminate that has undergone the intermediate processing into a pressed state after the intermediate processing, and processing a side face of the laminate in the pressed state after the intermediate processing.

Automatic separation of substrates from spacers within a substrate/spacer stack or laminate for use during a hard disk recording media fabrication process. In one example, a delamination apparatus includes a roller or brush configured to rotate while pressing against a flat surface of a substrate at one end of the laminate to peel the substrate from the laminate to expose an adjacent spacer and to then rotate against a flat surface of the spacer to peel the spacer from the laminate to expose another substrate of the laminate. The apparatus also includes a pusher bar configured to push against the opposite end of the laminate to push the laminate against the roller. The pusher bar may be offset from a central longitudinal axis of the laminate. A bath may be provided for submerging the laminate, the pusher, and the roller in a lubricating liquid. Method embodiments are also described.

A multilayer optical information recording disk comprising a plurality of recording layers and intermediate layers provided between the plurality of recording layers, and a method for manufacturing the same are provided. At least one of two intermediate layers disposed adjacent to respective sides of one recording layer is made of adhesive. Each of the recording layers includes a polymer binder and a dye dispersed in the polymer binder or includes a polymer to which a dye is bonded. Each recording layer is configured such that the dye absorbs a recording beam and generates heat which deforms the recording layer, causing an interface between the recording layer and the intermediate layer made of adhesive to have a protrusive shape protruding into the intermediate layer, thereby recording information thereat. The interface between the recording layer and the recording layer made of adhesive has a groove for track-following servo control.

The present invention is to provide: a photosensitive composition for volume hologram recording and a photosensitive substrate for volume hologram recording, which provide increased sensitivity during hologram recording and a high refractive index modulation amount, and which do not inhibit the decolorization of the sensitizing dye; and a volume hologram recorded medium which provides high-luminance hologram images with increased productivity. Disclosed is a photosensitive composition for volume hologram recording, comprising: a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the photopolymerization initiator, a binder resin, and a thiol group-containing compound, wherein the photopolymerizable monomer contains a photoradically polymerizable monomer and a photocationically polymerizable monomer; wherein the thiol group-containing compound is a chain transfer agent for the photoradically polymerizable monomer and is a polyfunctional secondary thiol compound having two or more secondary thiol groups per molecule; and wherein the content of the thiol group-containing compound is 1.5 to 30 parts by mass with respect to 100 parts by mass of the photoradically polymerizable monomer.

There is provided an optical recording medium including: three reproduction layers, wherein reflectance R1, R2, and R3 of the three reproduction layers on a side of a surface irradiated with reproduction light is equal to or greater than 5%, and wherein any absolute value of a difference delta R between two selected from the reflectance R1, R2, and R3 is equal to or less than 7%.

A printable recording media containing a substrate and a coating layer including a mixture of a first polymer selected from the group consisting of a polymer comprising ethylene residues and vinyl alcohol residues and a polymer comprising vinyl alcohol residues and a second polymer comprising ethylene residues, ethyl acrylate or acrylic ester residues and maleic anhydride residues wherein the amount of first polymer, in the mixture, is about 50% to about 95% by weight. Also disclosed herein is a method for making such printable recording media.

An aspect of the present invention relates to ferromagnetic hexagonal ferrite powder, the average particle size of which is equal to or less than 20 nm, and which comprises, on a particle number basis, equal to or more than 50% of ellipsoid hexagonal ferrite powders satisfying relation (1):

1.2<major axis length/minor axis length<2.0(1).

Provided is an optical recording medium including: two discs, each of which includes a substrate and a plurality of recording layers; and an attachment layer which is provided between the two discs and includes ultraviolet curable resin, wherein thickness of each of the substrates in the two discs is equal to or greater than 0.3 mm and equal to or less than 0.545 mm, wherein transmittance of the two discs is equal to or less than 20%, and wherein inversion rates on both surface sides of the attachment layer are equal or substantially equal to each other, and are equal to or greater than 70%.