Equipment and method of making optical recording medium

Abstract

An apparatus for preparing the optical record medium (disc) is composed of an injection moulding station with mother disc for producing disc substrates, a conveying belt for conveying, cooling and solidifying the disc substrates, a sputtering station for sputtering the reflecting material on the disc substrates, and an adhesive station for adhering the disc substrates to form disc. Said adhesive station has a voltage generator for applying instantaneous pulse voltage to each disc substrate to remove the air bubbles from adhesive and a rotating unit for rotating the each disc substrate in a disc by a relative angle to obtain better dynamic balance.

Description

technical field [0001] The present invention relates to the field of optical recording media. In particular, the present invention relates to an apparatus and method for producing a disc-shaped optical recording medium for transmitting or recording digital information, the use of said apparatus and implementation of the method for producing discs can reduce disc unevenness, At the same time, it avoids the dynamic unbalance that may occur when the disc is read, and eliminates air bubbles in the adhesive layer of the finished disc. Background technique [0002] DVD (Digital Versatile Disc) is one of the most popular optical storage media. DVD is intended to cover home entertainment, computing and business intelligence in a single digital format. Technically speaking, DVD is a relatively new generation of optical disc storage technology. Compared with CD, it has much larger digital capacity and much faster read / write speed. It can hold movie-like files better than CD audio an...

AI Technical Summary

Problems solved by technology

The disk containing adhesive bubbles will be delaminated due to the huge centrifugal force generated by high-speed rotation during use, which mainly affects the long-term stability of the DVD disk environmental test, and even directly causes the disk to be scrapped and the reading device to be destroyed

In addition, after each plate is made by compression molding, due to various reasons such as the density of the injection molding material, the humidity gradient, the shrinkage of the protective paint, and the heat gradient during injection molding, deformation and warpage often occur

The unevenness of the disk makes the physical center of gravity of the disk inconsistent with the geographical center of the disk, so when the disk is read, it is easy to cause the dynamic imbalance of the disk "jumping" up and down

This dynamic imbalance will affect playback and cause damage to the mechanical servo system of the player, resulting in misreading, noise, burning failure, loss of saved data, and inability to save data for a long time, etc.

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