Method for producing optic disc sheet and transport method for optic disc sheet stock body
A technology for optical discs and laminates, which is applied in the manufacture of optical record carriers, recording/reproducing by optical methods, and optical record carriers, etc., can solve the problem of the deterioration of the appearance quality of optical discs, the enlargement of peeling parts, and the inability of sheets to adhere completely. And other issues
Inactive Publication Date: 2003-06-25
FUJIFILM HLDG CORP
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Problems solved by technology
This wrinkling and delamination also contributes to a loss of optical disc appearance, as is the case if the plate is not fully adhered to the disc substrate
Furthermore, when peeling occurs on the sheet, air will enter between the sheet and the disc substrate, so that the sheet cannot be completely adhered to the disc substrate
When using an optical disc, the part where the air intrudes into it will be used as the starting point, and the peeling part of the plate will be enlarged, and the laser transmittance will be changed, which will cause recording and reproduction errors.
Method used
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experiment example 1
[0106] In this experimental example, the disc substrate of the optical disc is made of polycarbonate with a thickness of 1.2 mm and an outer diameter of 120 mm by molding. On the recording surface of this disk substrate, guide grooves having a groove depth of 175 nm, a groove width of 500 nm, and a track pitch of 1600 nm were formed. In addition, on the recording surface, a DC magnetic sputtering machine was used to form an aluminum film with a thickness of 80 nm as a light reflection layer. On the other hand, a transparent film of polyethylene terephthalate (PET) with a thickness of 62 μm is used as the substrate, and it is processed into the same shape as the disc substrate. In addition, in the disk substrate of this experimental example, an annular groove (hereinafter referred to as an inner peripheral annular groove) was formed on the inner peripheral side of the recording layer on the recording surface. This inner peripheral annular groove is equivalent to Figure 1 to ...
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Abstract
A method for manufacturing an optical disc and a method for transporting a multilayered optical disc are provided. When adhering the sheet and the disc substrate, after the adhesive is supplied to the outer side of the groove on the disc substrate, the sheet is loaded on the disc substrate. The adhesive is pressed to extend to the groove. At this timer, because the surplus adhesive is blocked when flowing into the groove, the surplus adhesive does not overflow easily toward the inner side of the groove. In addition, even if the adhesive overflows toward the inner side of the groove the adhesive is kept between the non-adhered portion of the sheet and the disc substrate, preventing the adhesive from moving to the disc surface. The non-adhered portion is cut by the cutting blade after the adhesive is completely cured, and then removed from the disc substrate.
Description
technical field [0001] The invention relates to a manufacturing method of an optical disc. The optical disc utilizes laser light to record or reproduce information. In particular, a method for manufacturing an optical disc in which a sheet made of a transparent resin is bonded to a disc substrate to form a cover layer, and a method for transporting an optical disc laminate for transporting An optical disc laminate formed by placing a film-like sheet on a disc substrate with a liquid adhesive. Background technique [0002] Optical discs that use lasers to record or reproduce data, such as CD-R (Compact Disc-Recordable), a CD (Compact Disc), a DVD (Digital Versatile Disc), or a DVD-R (Digital Versatile Disc-Recordable) have become more and more popular. more and more common. However, in recent years, it is hoped that the optical disc can store a larger amount of information, such as image data, so the research on high density continues to be carried out. The recording densi...
Claims
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IPC IPC(8): B29C65/52B32B37/12G11B7/24G11B7/24056G11B7/26
CPCB29C65/1406B29C65/521B32B2429/02B32B37/1284B29C65/1483B29C2035/0827B29L2017/005G11B7/265B29C65/7847B29C65/4845G11B7/266B29C65/1448B29C66/452B29C65/1435B29C66/71B29C66/1122Y10T156/1744Y10T156/108Y10T156/1768B29C65/7811B29K2067/003B29K2069/00
Inventor 片山和俊宇佐美由久
Owner FUJIFILM HLDG CORP