CN1248044A

CN1248044A - Optical record medium

Info

Publication number: CN1248044A
Application number: CN98112629A
Authority: CN
Inventors: 黄笳唐
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-13
Filing date: 1998-09-13
Publication date: 2000-03-22

Abstract

The optical record medium has highly reflective metal layer adhered closely to the surface of substrate material. The said metal layer may be made of metal silver with purity not lower than 99.9% or silver alloy containing silver in 50-95 wt% and at least one kind of metal selected from Conduct, In, Sn, Bi, Cu, Al, Pb, Zn and Cr.

Description

Optical record medium

The present invention relates to the material of optical information storer coding, specifically be meant the material of canned data coding that includes substrate layer and be close to the soft metal layer of substrate layer.

At present, substrate layer by made such as the polymkeric substance of polycarbonate, polyester, polypropylene, the light polymkeric substance of monochloro ethene fragrance, ethene chimney thing, plastic optical fibre reinforced plasticss, on substrate, attach the soft metal layer of high reflectance, but such optics recovering information is widely used, as CD, VCD, LD, CVD, DVD, CD-ROM as playing and the CD of canned data data.

In these storage systems, information is expressed by the high reflecting background layer on the device by being stored on the device with minimum concaveconvex structure.In manufacture process, such concaveconvex structure permanently is pressed in the disc, when the relative laser beam of device is passive, because the difference of the reflected signal that the existence of these jogs produces, but the signal that therefore provides electronics to decode.The essence of detected modulation signal is because the phase relation between the reflected light of the reflected light of concaveconvex structure and its peripheral part changes from the coding structure of these systems.Thereby it is very important that the activity of sunk part circumferential surface and the metal surface of reflection keep relatively unaffected when datum recover.Any destruction on this surface all will cause optical signal quality decline in reading process, thereby the error rate (BEK) of increase sunk part becomes the ratio of image and sound with the reduction conversion of signals.The soft metal that requires to be attached on the substrate layer in manufacture process has low-melting characteristics, so that can make laser emission under the little energy consumption of trying one's best, form jog rapidly, material preferably has lower thermal diffusion coefficient simultaneously, so that the heat that in the process of writing, produces neither can the loss adjacency substrate layer, can transverse dispersion do not make expanded in size a little yet, clean and in soft metal layer, form, distinct point, the soft metal reaction has suitable surface energy in addition, so that the point edge that is produced when the light beam that use is write is clear, thereby be to be obvious in the process of reading, signal clearly, the most important thing is that the reflection horizon, soft metal will be evenly, and can between information point and circumferential surface thereof, provide tangible, contrast clearly is so that conversion of signals becomes the ratio of image and sound to reach maximum.In addition, in order to ensure the long preservation of coded message, require the softer metals of active reflection to have the corrosion resistance and the inoxidizability of height, corrosion and oxidation can directly make signal rotten.

The invention provides a kind of improved light storage device, it can provide more obvious, the economical rationality of signal, and producing cost clearly in the process of reading.

The present invention utilizes the substrate of a metal clad film, constitute substrate with glass, pottery, epoxy resin, plastics, fiber-reinforced plastic, metal and their compound substance, metallic film is made by argent or silver alloy with highly reflective energy, wherein the purity of argent is not less than 99.9%, and silver alloy is that 50% to 95% silver and one group comprise that selecting many a kind of metals in cadmium, indium, tin, antimony, bismuth, magnesium, copper, aluminium, zinc, the chromium forms by percentage by weight.

Need metal or metal alloy to have the corrosion-resistant neutrality and the oxidative resistance of height as a kind of good metallic film; could guarantee the long-term protection of light storage device and not make signal rotten; the spraying or be plated on the substrate layer smooth; avoid making signal produce mistake at do not produce concavo-convex of manufacture process laser ablation concavo-convex because of coating inhomogeneous; influence conversion quality; be affixed on easily and guarantee to reduce during fabrication difficulty and saving manufacturing cost on the substrate, the highly reflective of coating is very important to improving signal quality and reducing the light storage device expense simultaneously.

Present metallic film at light storage device, one class is main material with highly purified gold, one class is the metallic film material that the patent No. 88100713 of Chinese patent has been announced, it is by comprising that with one group at least two kinds of metals selecting in the metal of cadmium, indium, tin, antimony, aluminium, bismuth, magnesium, copper, aluminium, zinc and silver form, and every kind of shared percentage by weight of metal is at least 5%.No matter highly purified gold is from the corrosivity inoxidizability, coating evenly, slickness and reflectivity all are much higher than metal alloy, highly purified gold film reflectivity 96%, and the reflectivity of optical thin film of metal alloy only is 83%, though the light storage device performance of high-purity gold metal film is higher than the performance that metal alloy is a metallic film, price is much higher than metal alloy compositions, thereby is difficult to promote.Highly purified argent and silver alloy are as the metallic film of light storage device, have a lot of identical performances with highly purified gold coating, as has a higher corrosion resistance, inoxidizability and high reflectance, luminance factor common metal alloy layer is high by 15%, can increase substantially the quality of light storage device, the gold of the relative purity of price is much lower simultaneously, the producing cost economical rationality.

Claims

The information storage medium of reading with optical means, high reflectance soft metal layer after comprising a substrate and being attached to substrate, substrate glass, pottery, epoxy resin, plastics, fiber-reinforced plastic, metal and their compound substance, it is characterized in that being attached to the high-reflectivity metal layer of substrate layer, form by argent or silver alloy, wherein the purity of argent must not be lower than 99.9%, and silver alloy is that 50% to 95% silver and one group comprise cadmium, plug with molten metal, is selected at least a metal in the tin, antimony, bismuth, copper, aluminium, chromium, lead, zinc and form by percentage by weight.