Method of manufacturing an optical recording medium
AssigneeSeiko Epson Corporation, a Japanese Corporation
InventorNobuhiko Kano
Life of this patent
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Abstract
An optical recording medium and a method for manufacturing an optical recording medium from a first substrate having a first surface and a second substrate having a second surface facing the first surface of the first substrate. At least one of the first and second substrates includes an information recording layer. An adhesive material is selectively applied to one of the first and second surfaces. The first surface of the first substrate is then positioned in close facing engagement with the second surface of the second substrate, and the first and second substrates are adhered under predetermined partial vacuum conditions. Preferred materials, adhesives, viscosity of the adhesives, pressures for adhering the substrates, and degree of vacuum are disclosed.
Claims33
A method of manufacturing an optical recording medium using a first substrate having a first surface formed as the surface of a layer of dielectric material and a second substrate having a second surface facing said first surface of said first substrate, at least one of said first and second substrates including an information recording layer proximate the respective first and second surfaces thereof, comprising the steps of selectively applying an adhesive material to said first surface of said first substrate in a ring shaped pattern so that adhesive will properly wet the surface of the substrates, creating a partial vacuum of between about 30 torr and 5.times.10.sup.-3 torr around said first and second substrates, and positioning said second surface of said second substrate adjacent said first surface of said first substrate with said adhesive material therebetween and pressing the substrates together with a force no greater than about the weight of one of the first and second substrates to adhere said first and second substrates together to form said optical recording medium.
Dependencies are inferred from the claim text.