A method of decomposing a cured aromatic epoxy resin uses a molten salt bath at less than about 350° C. The molten salt bath includes a plurality of alkali metal hydroxides. The cured aromatic epoxy resin can be in intimate physical contact with a metal or alloy. The cured aromatic epoxy resin can be patterned by a lithographic method. The lithographic method can be multibeam interference lithography to form a three-dimensional photonic crystal template on a conductive substrate for electrodeposition of metal. Contacting the three-dimensional photonic crystal template with the electrodeposited metal with the molten salt bath can form a metal matrix device displaying a periodic pattern that is the inverse of the periodic pattern of the decomposed three-dimensional photonic crystal template.

A method of decomposing a cured aromatic epoxy resin uses a molten salt bath at less than about 350° C. The molten salt bath includes a plurality of alkali metal hydroxides. The cured aromatic epoxy resin can be in intimate physical contact with a metal or alloy. The cured aromatic epoxy resin can be patterned by a lithographic method. The lithographic method can be multibeam interference lithography to form a three-dimensional photonic crystal template on a conductive substrate for electrodeposition of metal. Contacting the three-dimensional photonic crystal template with the electrodeposited metal with the molten salt bath can form a metal matrix device displaying a periodic pattern that is the inverse of the periodic pattern of the decomposed three-dimensional photonic crystal template.

Stacked magnetic cores that can achieve high density with a small footprint, as well as methods of fabricating and using the same, are provided. A stacked magnetic core can be fabricated by depositing nanomagnetic films with control in composition and nanostructure via a continuous electroplating process. The magnetic films are interspersed with thin adhesive films (that can be insulating) in an automated roll-to-roll process. That is, the magnetic films and adhesive films are disposed in an alternating fashion. The adhesive films can keep the magnetic films completely electrically isolated from each other, while also adhering adjacent magnetic films to each other.

Stacked magnetic cores that can achieve high density with a small footprint, as well as methods of fabricating and using the same, are provided. A stacked magnetic core can be fabricated by depositing nanomagnetic films with control in composition and nanostructure via a continuous electroplating process. The magnetic films are interspersed with thin adhesive films (that can be insulating) in an automated roll-to-roll process. That is, the magnetic films and adhesive films are disposed in an alternating fashion. The adhesive films can keep the magnetic films completely electrically isolated from each other, while also adhering adjacent magnetic films to each other.

Articles prepared by additive manufacturing of preforms that are coated by electrodeposition of nanolaminate materials, and methods of their production are described.

Articles prepared by additive manufacturing of preforms that are coated by electrodeposition of nanolaminate materials, and methods of their production are described.

Disclosed is a method for preparing a high-flatness metal foil suitable for making a metal mask, and the method comprises the following steps: forming a raw metal coarse foil; rolling the raw metal coarse foil at least once into a high-flatness metal foil; performing, by a heat treatment device, heat treatment processing on the precisely rolled metal foil according to a preset temperature and a preset time; using a tension leveler to perform tension leveling on the rolled and heat-treated metal foil; and obtaining a high-flatness metal foil after completion of the tension leveling and forming a rolled metal foil in a continuous forming process. The resulting metal foil has high flatness and low residual stress, which improves quality and performance of the metal foil and is suitable for the fabrication of fine metal masks.

Disclosed is a method for preparing a high-flatness metal foil suitable for making a metal mask, and the method comprises the following steps: forming a raw metal coarse foil; rolling the raw metal coarse foil at least once into a high-flatness metal foil; performing, by a heat treatment device, heat treatment processing on the precisely rolled metal foil according to a preset temperature and a preset time; using a tension leveler to perform tension leveling on the rolled and heat-treated metal foil; and obtaining a high-flatness metal foil after completion of the tension leveling and forming a rolled metal foil in a continuous forming process. The resulting metal foil has high flatness and low residual stress, which improves quality and performance of the metal foil and is suitable for the fabrication of fine metal masks.

An embodiment of the present invention provides a copper foil which comprises a copper layer and an anticorrosive film placed on the copper layer, and has a Young's modulus of 3800 to 4600 kgf/mm.sup.2 and a modulus bias factor (MBF) less than 0.12, wherein the modulus bias factor (MBF) is obtained by formula 1 below.
MBF=(maximum Young's modulus−minimum Young's modulus)/(average Young's modulus)  [Formula 1]

An electroforming method capable of suppressing peeling of an electroforming material from an electroforming master during electroforming, and controlling a shape of an electroforming material, and a method for producing an electroforming material are provided. The present invention is to provide the electroforming method including forming an electroforming material on a surface of an electroforming master in an electroforming liquid by using the electroforming master as a cathode, in which the electroforming master includes a conductive substrate having a pattern on a surface, the pattern having a protruding portion of which a surface is non-conductive, and an underlying layer that has a sheet resistance of 500Ω/□ or greater, and that is formed on at least a part of the surface of the substrate in an in-plane direction, and the method for producing an electroforming material.