Abstract: A semiconductor storage device includes a stacked body where a conductive layer and an insulating layer are stacked a multiple number of times; a plate-shaped portion extending along a stacking direction of the stacked body and a first direction and dividing the stacked body along a second direction; and a pillar penetrating the stacked body. A width of the plate-shaped portion in the second direction at the same height as a conductive layer located at the top is larger than a width of the plate-shaped portion in the second direction at the same height as a conductive layer located at the bottom, and a width of the pillar in the second direction at the same height as the conductive layer located at the top is smaller than a width of the pillar in the second direction at the same height as the conductive layer located at the bottom.

Abstract: An optical recording medium is provided with: a first substrate having first pits on one face thereof; a first reflective layer that is formed on the face bearing the first pits of the first substrate in a manner so as to reflect lands and recesses of the first pits; a second substrate that is formed on the first reflective layer, with second pits being formed on a face on the side opposite to the first reflective layer; a second reflective layer that is formed on the face bearing the second pits of the second substrate in a manner so as to reflect lands and recesses of the second pits; and a cover layer formed on the second reflective layer. In this structure, the first pit depth d1 that is a difference between lands and recesses of the first reflective layer, the wavelength ? of signal-reproducing laser light and the refractive index n1 of the second substrate satisfy the following relational expressions: ?/(5n1)?d1??/(3n1) and d1??/(4n1).

Abstract: An optical recording medium is provided with: a first substrate having first pits on one face thereof; a first reflective layer that is formed on the face bearing the first pits of the first substrate in a manner so as to reflect lands and recesses of the first pits; a second substrate that is formed on the first reflective layer, with second pits being formed on a face on the side opposite to the first reflective layer; a second reflective layer that is formed on the face bearing the second pits of the second substrate in a manner so as to reflect lands and recesses of the second pits; and a cover layer formed on the second reflective layer. In this structure, the first pit depth d1 that is a difference between lands and recesses of the first reflective layer, the wavelength ? of signal-reproducing laser light and the refractive index n1 of the second substrate satisfy the following relational expressions: ?/(5n1)?d1??/(3n1) and d1??/(4n1).

Abstract: An optical-recording medium, comprising: a substrate on which information is formed as pit rows constituted by concavities and convexities having a predetermined track pitch; at least a first metal reflective layer; and a transparent resin layer formed on the first metal reflective layer, which are formed on the substrate, wherein the information is reproduced by applying a light beam onto a signal face formed on the resin layer side of the first metal reflective layer, characterized in that the following relational expression: 1.0<D(S)/D(L)?1.3 is satisfied, provided that a depth of the shortest pit formed in the signal face is D(S) and a depth of the longest pit formed in the signal face is D(L).

Abstract: The object of the present invention is to provide a method of manufacturing a master of an optical information recording medium, a method of manufacturing a stamper of an optical information recording medium, a master and a stamper of an optical information recording medium and an optical information recording medium, in which the shape of a pattern of pits and/or a groove remains high-quality by reducing the change of state of an inorganic material when transcribing a predetermined pattern of pits and/or a groove on a side of the stamper, even when an inorganic material is used as an resist.

Abstract: The following steps are included: a step of changing crystal states of the specific portion of an resist layer of a master disk having an etching layer and the resist layer formed on the etching layer through exposure, a step of removing the specific portion, a step of removing the portion of the etching layer overlapping the removed portion of the resist layer, a step of forming a conductive film from which the resist layer is removed, a step of performing electroforming by using the conductive film as an electrode, and a step of exfoliating the etching layer from the conductive film.

Abstract: When producing a second stamper by forming a nickel electroformed film on a father stamper having patterns of pits and lands, defects appear on the second stamper during the stage of separating the second stamper from the father stamper. The object of the present invention is to decrease these defects. A method for manufacturing a stamper comprises performing a plasma surface treatment on a surface of a father stamper 106 having patterns of pits and lands, forming a nickel electroformed film (II) 107 on the surface of the father stamper 106, and separating the nickel electroformed film (II) 107 from the father stamper 106 so as to form a mother stamper 108.

Abstract: A method for producing a master disk 105 for an optical disk 110 includes a layer forming step of forming a heat-sensitive material layer 102 on a substrate 101, an exposure step of exposing the heat-sensitive material layer 102 partially to a laser beam, and a pit and land pattern forming step of forming a pattern of pits and lands by means of the difference between the etching rates of the exposed portion and the unexposed portion of the heat-sensitive material layer 102. The heat-sensitive material layer 102 includes at least Sb and O. When the composition ratio of O is defined as x (atom %), x is 3 or more and 50 or less.

Abstract: A method of manufacturing a master of an optical information recording medium includes a resist layer formation step of using a resist to form a resist layer on an upper surface of a substrate, an exposure step for selectively exposing the resist layer to cause a change of state in the resist layer, and a development step for performing an alkali development process on the resist layer after the exposure step. The resist is primarily composed of an inorganic material and contains at least Te and O, and further contains a stabilizing additive having a lower solubility than TeO2 in an alkaline environment.

Abstract: A multilayer film including a first magnetic layer, a second magnetic layer, and a third magnetic layer in the stated order is formed so that a Curie temperature TC2 of the second magnetic layer is set to be lower than a Curie temperature TC1 of the first magnetic layer and a Curie temperature TC3 of the third magnetic layer and that the third magnetic layer is a perpendicular magnetization film. In at least a part of a region at a temperature lower than TC2, the first magnetic layer is perpendicularly magnetized by exchange coupling with the second magnetic layer, and the magnetization of the third magnetic layer is transferred to the first magnetic layer via the second magnetic layer because of the exchange coupling. The second magnetic layer is made of a magnetic layer that remains in an in-plane magnetization state at room temperature and is perpendicularly magnetized in a temperature range from a critical temperature TCR higher than room temperature to the Curie temperature TC2 of the same.

Abstract: By irradiating a light beam between recording tracks of the magneto-optical recording medium, the magnetic anisotropy of at least one layer selected from the group consisting of the domain wall displacement layer and the recording layer formed between the recording tracks can be made lower than that of said layers on the recording tracks, and a bias magnetic field is applied at least between recording tracks while a light beam is radiated. Because of this, initialization of a medium may be conducted simultaneously.

Abstract: By irradiating a light beam between recording tracks of the magneto-optical recording medium, the magnetic anisotropy of at least one layer selected from the group consisting of the domain wall displacement layer and the recording layer formed between the recording tracks can be made lower than that of said layers on the recording tracks, and a bias magnetic field is applied at least between recording tracks while a light beam is radiated. Because of this, initialization of a medium may be conducted simultaneously.

Abstract: A multilayer film including a first magnetic layer, a second magnetic layer, and a third magnetic layer in the stated order is formed so that a Curie temperature TC2 of the second magnetic layer is set to be lower than a Curie temperature TC1 of the first magnetic layer and a Curie temperature TC3 of the third magnetic layer and that the third magnetic layer is a perpendicular magnetization film. In at least a part of a region at a temperature lower than TC2, the first magnetic layer is perpendicularly magnetized by exchange coupling with the second magnetic layer, and the magnetization of the third magnetic layer is transferred to the first magnetic layer via the second magnetic layer because of the exchange coupling. The second magnetic layer is made of a magnetic layer that remains in an in-plane magnetization state at room temperature and is perpendicularly magnetized in a temperature range from a critical temperature TCR higher than room temperature to the Curie temperature TC2 of the same.