Abstract: A disc package assembly for packaging and accommodating multiple discs is provided. The disc package assembly includes an upper cover and a base. The upper cover includes a through-hole, a first annular protrusion, a second annular protrusion, and a restraining portion. The thickness of the upper cover gradually increases from the edge of the upper cover toward the center. Further, the base includes a hollow fastening portion and a third annular protrusion. An annular part is formed at the upper end of the fastening portion and has several slots. The fastening portion includes a central through-hole penetrating through the base. The thickness of the base gradually increases from the edge of the base toward the center. The disc package assembly may further include a thermal shrink film for wrapping over the disc package assembly and the discs.

Abstract: A method of manufacturing an optical disc comprises the steps of: (1) forming a substrate including an inner supporting section and an outer information recording section, the inner supporting section having a thickness larger than that of the outer information recording section; and (2) forming a vibration suppressing layer by printing UV curable paste three to five times over the surface of the non-recording side of the outer information recording section from an inner edge of the outer information recording section to a designated diameter, wherein the printed UV curable paste has a weight of 15% to 25% of the weight of the substrate, and at least 90% of the weight of the printed UV curable paste is distributed within a circular region with diameter 90 mm to 110 mm, each time the UV curable paste printed not exceeding 5% of the weight of the substrate.

Abstract: An optical disc of a thicker supporting section and a thinner recording section is characterized by: a reinforcement section of a predetermined width which overlaps a supporting section and a recording section. With the reinforcement section, the structure of the optical disc is strengthened, and the resonant frequency of the optical disc is raised, so that the vibration of the optical disc is suppressed and the disc is suitable for high speed (16× up) reading/writing. The optical disc comprises: a circular opening disposed in the center of the optical disc; an annular recording section; an annular supporting section disposed between the annular recording section and the circular opening, wherein the annular supporting section is thicker than the annular recording section; and an annular reinforcement section which is disposed on one of the two sides of the optical disc and overlaps the annular supporting section and the annular recording section.

Abstract: An optical disc includes a round opening at the center of the optical disc, an annular recording section configured to record information, an annular supporting section between the round opening and the annular recording section and configured to support the optical disc, and a spoiler provided on a non-read/write side of the annular recording section and configured to disturb the flow field inside the optical disc drive when the optical disc is rotating, the spoiler having a centerline average roughness between 2 ?m and 10 ?m, a thickness between 0.02 mm and 0.05 mm, an area occupying at least 5% of the non-read/write side. The flow field so disturbed changes from a laminar state to a turbulent state and thus the read/write characteristics of the disc is improved due to lower air resistance experienced by the rotating disc.

Abstract: An optical disc includes an annular substrate, a coating layer, a damping layer, and a leveling layer. The annular substrate includes a supporting portion, and a recording portion surrounding the supporting portion, wherein the recording portion has a recording surface located on a first side thereof. For disc clamping and cost saving, the supporting portion is thicker than the recording portion. The coating layer is formed on the recoding surface for recording dada. The damping layer is formed on the coating layer to shorten the response time of the optical disc to vibration. The leveling layer is formed on the side of the annular substrate opposite to the recording surface for leveling the disk deformation caused during fabrication. A method for fabricating the aforementioned optical disc is also disclosed.

Abstract: An optical disc capable of suppressing vibration during read/write process includes an annular substrate, a coated layer, and a damping layer. The annular substrate includes a supporting portion and a recording portion, and a recording surface corresponding to the recording portion. The coated layer is formed on the recording surface. The damping layer is formed on the coated layer side of the annular substrate for increasing the response time to vibration of the optical disc. A method for fabricating the aforementioned optical disc is also disclosed.

Abstract: The invention relates to a tool for coating an optical disc, and the tool includes: a coating section for spreading coating material; a restricting section for defining a coating area; and a support section for supporting the coating section and the restricting section. The coating section and the restricting section form a material accommodating space. Also, a method for coating an optical disc by using such tool and a method for fabricating an optical disc are disclosed.

Abstract: A method of manufacturing an optical disc comprises the steps of: (1) forming a substrate including an inner supporting section and an outer information recording section, the inner supporting section having a thickness larger than that of the outer information recording section; and (2) forming a vibration suppressing layer by printing UV curable paste three to five times over the surface of the non-recording side of the outer information recording section from an inner edge of the outer information recording section to a designated diameter, wherein the printed UV curable paste has a weight of 15% to 25% of the weight of the substrate, and at least 90% of the weight of the printed UV curable paste is distributed within a circular region with diameter 90 mm to 110 mm, each time the UV curable paste printed not exceeding 5% of the weight of the substrate.

Abstract: An optical disc includes a round opening at the center of the optical disc, an annular recording section configured to record information, an annular supporting section between the round opening and the annular recording section and configured to support the optical disc, and a spoiler provided on a non-read/write side of the annular recording section and configured to disturb the flow field inside the optical disc drive when the optical disc is rotating, the spoiler having a centerline average roughness between 2 ?m and 10 ?m, a thickness between 0.02 mm and 0.05 mm, an area occupying at least 5% of the non-read/write side. The flow field so disturbed changes from a laminar state to a turbulent state and thus the read/write characteristics of the disc is improved due to lower air resistance experienced by the rotating disc.

Abstract: The invention relates to a tool for coating an optical disc, and the tool includes: a coating section for spreading coating material; a restricting section for defining a coating area; and a support section for supporting the coating section and the restricting section. The coating section and the restricting section form a material accommodating space. Also, a method for coating an optical disc by using such tool and a method for fabricating an optical disc are disclosed.

Abstract: An optical disc includes an annular substrate, a coating layer, a damping layer, and a leveling layer. The annular substrate includes a supporting portion, and a recording portion surrounding the supporting portion, wherein the recording portion has a recording surface located on a first side thereof. For disc clamping and cost saving, the supporting portion is thicker than the recording portion. The coating layer is formed on the recoding surface for recording dada. The damping layer is formed on the coating layer to shorten the response time of the optical disc to vibration. The leveling layer is formed on the side of the annular substrate opposite to the recording surface for leveling the disk deformation caused during fabrication. A method for fabricating the aforementioned optical disc is also disclosed.

Abstract: An optical disc includes an annular substrate, a coating layer, and a compensation sheet. The annular substrate has a supporting portion, a recording portion surrounding the supporting portion, and a recording surface corresponding to the recording portion. The coating layer is formed on the recording surface for recording data. The compensation sheet is attached to the annular substrate so that the coating layer is sandwiched between the annular substrate and the compensation sheet, and that the thickness of the optical disc at the recording portion is the same as the thickness of the optical disc at the supporting portion, wherein the data read/write is performed from the compensation sheet side of the optical disc by a driving device. A method of fabricating the same is also disclosed.

Abstract: An optical disc capable of suppressing vibration during read/write process includes an annular substrate, a coated layer, and a damping layer. The annular substrate includes a supporting portion and a recording portion, and a recording surface corresponding to the recording portion. The coated layer is formed on the recording surface. The damping layer is formed on the coated layer side of the annular substrate for increasing the response time to vibration of the optical disc. A method for fabricating the aforementioned optical disc is also disclosed.

Abstract: An optical disk substrate includes an annular substrate and a protruding portion. The annular substrate has an inner supporting portion and an outer recording portion having a recording surface. The protruding portion overlaying on the supporting portion has a plurality of indentations on its outer periphery, wherein the total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion. An optical disk, wherein a paint layer for recording data is coated on the recording surface of the disk substrate, is also disclosed.

Abstract: An optical disk substrate with a central hole is disclosed in the invention. The optical disk substrate includes: a first annular area for clamping, which surrounds the outer edge of the central hole and includes a first upper surface and a first lower surface thereon; and a second annular area for forming an information storing area, which surrounds the outer edge of the first annular area and includes a second upper surface and a second lower surface thereon; besides, the first lower surface and the second lower surface are on the same plane, whereas the first upper surface is higher than the second upper surface. Moreover, an optical disk that applies the optical disk substrate and a method for forming the optical disk are also disclosed in the invention.