DVDR optical disk

Abstract

A DVDR optical disc structure is prepared for forming reflection layer by the first and the second as well as the third reflection layers, using gold layer as the first reflection layer and silver layer as the second reflection layer as well as copper layer as the third reflection layer.

Description

technical field [0001] The present invention relates to the structure of optical discs, especially optical data carriers such as DVDR discs (DVD-ROM, DVD9, DVD-R / RW, DVD+R / RW and other DVD formats). Background technique [0002] DVD (Data Versatile Disc) has become the mainstream of optical information storage media and is the most popular optical storage medium due to its advantages of high storage density, small size, long storage period, low cost, high compatibility and low error rate. one of the media. Technically speaking, DVD is a relatively new generation of optical disc storage technology. It is much larger in digital capacity than CD, and the reading and writing speed is much faster, and it can hold movie-like video better than CD audio, pictures and computer data. DVD is intended to cover home entertainment, computing and business intelligence in a single digital format. It has replaced laser discs, is expected to replace video cassettes and video game TVs, and ...

AI Technical Summary

Problems solved by technology

When the reflective material is sputtered on the dye layer, due to the active chemical properties of silver, it is easy to react with a small amount of solvent remaining in the dye layer, which will cause bubbles, pinholes, etc. platter quality

This will result in unqualified or downgraded disc quality, which will increase the manufacturing cost of the disc manufacturer, which is obviously unfavorable to the production of discs.

[0014] At the same time, the adhesive glue in the adhesive layer may also chemically corrode the silver reflective layer, and the adhesive will also erode itself, thereby generating air bubbles in the disc, and the air in the air bubbles will oxidize the silver. After a certain period of time, pinholes will form

A disc containing air bubbles will cause delamination due to the huge centrifugal force generated by the high-speed rotation of the disc itself when reading data, which will affect the long-term stability of the DVDR disc, and even directly lead to the scrapping of the disc and damage to the reading device

Therefore, the use of pure silver (99.99% pure) as the reflective material in the traditional technology is not perfect, and there are also certain defects in the traditional optical disc structure, which is an important reason for the above-mentioned various defects.

Images