CN1466139A - Method for making disc - Google Patents

Abstract

The invention is a manufacturing method of CD disk which applies to base board agglutinated with cover board and base board. The method overcomes the problem that the mechanism character appears abnormity along with the time gone through controlling the hyperbolic refractive index at 23mm point of radius on the cover board between -10nm-35nm, so it can increase the life the disk.

Description

The disc manufacture method

Technical field

The invention relates to a kind of disc manufacture method, and particularly relevant for a kind of hyperbolic refractive index by the adjustment cover plate, to improve the disc manufacture method of disc warpage phenomenon.

Background technology

Disc since have storage volume big, preserve easily, storage life limit for length, with low cost, be difficult for advantage such as infringement with data, replace generally traditional magnetic Storage Media gradually and become one of indispensable medium of modern.Because the manufacturing technology and the multimedia video compress technique of laser photoelectricity product are increasingly mature, the developing direction of following light memory medium is all towards high power capacity, small size development, so (Digital VersatileDisk DVD) becomes the main flow in market gradually the big Video CD of storage volume.Common on the market Video CD product can slightly be divided into prerecorded DVD and two kinds of kenels of recordable type DVD, wherein, prerecorded DVD can be divided into kenels such as DVD-5, DVD-9, DVD-10, DVD-18, and recordable type DVD can be divided into kenels such as DVD-R, DVD-RW, DVD-RAM.

Fig. 1 to Fig. 4 is the structural profile synoptic diagram of four kinds of prerecorded DVD.At first please refer to Fig. 1, the DVD-5 disc mainly is made of substrate 100, pre-record layer 102, reflection horizon 104, cementing layer 106 and cover plate 108.The making of general DVD-5 is that the layer 102 of pre-recording is made on the substrate 100 with reflection horizon 104, substrate 100 is passed through cementing layer 106 and cover plate 108 gummeds afterwards again.Therefore, DVD-5 is the structure of a single-surface single-layer, and its capacity is about 4.7GB.

Then please refer to Fig. 2, the DVD-10 disc mainly by substrate 200, pre-record the layer 202, reflection horizon 204, cementing layer 206, reflection horizon 208, pre-record the layer 210 and substrate 212 constituted.The making of the general DVD-10 layer 202 of will pre-recording is made on the substrate 200 with reflection horizon 204, and the layer 210 of will pre-recording is made on the substrate 212 with reflection horizon 208, afterwards again with substrate 200 by cementing layer 206 and substrate 212 gummeds.Therefore, DVD-10 is the structure of a two-sided individual layer, and its capacity is about 9.4GB.

Then please refer to Fig. 3, the DVD-9 disc is made of substrate 300, the layer 302 of pre-recording, semi-reflective layer 304, pre-record layer 306, reflection horizon 308, cementing layer 310 and cover plate 312.The making of general DVD-9 is that the layer 302 of pre-recording, semi-reflective layer 304, pre-record layer 306 and reflection horizon 308 are made on the substrate 300, afterwards again with substrate 300 by cementing layer 310 and cover plate 312 gummeds.Therefore, DVD-9 is the structure of a single-surface double-layer, and its capacity is about 8.5GB.

Then please refer to Fig. 4, the DVD-18 disc mainly by substrate 400, pre-record the layer 402, semi-reflective layer 404, pre-record the layer 406, reflection horizon 408, cementing layer 410, reflection horizon 412, pre-record the layer 414, semi-reflective layer 416, pre-record the layer 418 and substrate 420 constituted.The making of general DVD-18 is that the layer 402 of pre-recording, semi-reflective layer 404, pre-record layer 406 and reflection horizon 408 are made on the substrate 400, and the layer 418 of will pre-recording, semi-reflective layer 416, pre-record layer 414 and reflection horizon 412 be made in substrate 420, afterwards again with substrate 400 by cementing layer 410 and cover plate 420 gummeds.Therefore, DVD-18 is a two-sided structure of two layers, and its capacity is about 17GB.

Fig. 5 is the structural profile synoptic diagram of recordable type DVD.Please refer to Fig. 5, recordable type DVD mainly is made of substrate 500, pre-record layer 502, reflection horizon 504, cementing layer 506 and cover plate 508.The making of general record type DVD is that the layer 502 of pre-recording is made on the substrate 500 with reflection horizon 504, substrate 500 is glued together by cementing layer 506 and cover plate 508 afterwards again.

Recordable type DVD can slightly be divided into kenels such as DVD-R, DVD-RW and DVD-RAM.Wherein, DVD-R is a recordable type disc, and its structure and DVD-5 are similar, and capacity is 4.7GB, and only the difference part is to dispose between substrate 500 and the reflection horizon 504 is a recording layer 502 but not the layer of pre-recording.DVD-RW is the disc of rewritable, its manifolding number of times up to 1,000 time about, its capacity is all 4.7GB.Structure and the DVD-R of DVD-RW are similar, and only the difference part is the material of its recording layer 502, and it is the unitized construction of trilamellar membrane.And DVD-RAM also is the disc of rewritable, its manifolding number of times up to 100,000 times about, its structure and DVD-RW are similar, thought difference part is that the material of its recording layer 502 is different with the rete number.

Be known in and carry out DVD-5, DVD-9 and recordable type DVD one substrate and the cover plate gummed that contains information constituted, because substrate and cover plate are the base material of different qualities, therefore the mechanical property of disc can change along with the time behind gummed, and then have influence on the quality of disc, even may cause disc normally to read or record.

In addition, owing to the mechanical property of disc can change along with the time,, also might cause damage to reading device so the disc after the warpage not only can't normally read or record.

Summary of the invention

Therefore, the objective of the invention is to propose a kind of disc manufacture method, be applicable to the disc that forms by substrate and cover plate gummed, by the quality and the life-span of hyperbolic refractive index to improve disc of control cover plate.

For reaching above-mentioned purpose of the present invention, a kind of disc manufacture method is proposed, a substrate at first is provided, on substrate, form in regular turn one pre-record the layer and a reflection horizon.One cover plate then is provided, and control cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm.At last with substrate and cover plate gummed, to form a DVD-5 disc.

For reaching above-mentioned purpose of the present invention, a kind of disc manufacture method is proposed, a substrate at first is provided, on substrate, form layer, a reflection horizon, a semi-reflective layer and a layer of pre-recording of pre-recording in regular turn.One cover plate then is provided, and control cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm.At last with substrate and cover plate gummed, to form a DVD-9 disc.

For reaching above-mentioned purpose of the present invention, a kind of disc manufacture method is proposed, a substrate at first is provided, on substrate, form a recording layer and a reflection horizon in regular turn.One cover plate then is provided, and control cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm.At last with substrate and cover plate gummed, to form a DVD-9 disc.

Among the present invention, substrate, cover plate for example form with injection molding method; Reflection horizon on the substrate for example forms with sputtering way; And the juncture between substrate and the cover plate for example is rotary coating gummed method, hot melt adhesive pressing gummed method, screen printing gummed method, patch gummed method, and the compression set method etc.

For reaching above-mentioned purpose of the present invention, a kind of cover plate is proposed, be suitable for becoming a disc with a base plate bonding, wherein this cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm.

Description of drawings

Fig. 1 to Fig. 4 is the structural profile synoptic diagram of four kinds of prerecorded DVD;

Fig. 5 is the structural profile synoptic diagram of recordable type DVD;

Fig. 6 is the block flow diagram of making according to a preferred embodiment of the present invention disc;

Fig. 7 A, Fig. 7 B and Fig. 7 C tabular respectively go out each parameter value that the present embodiment disc measures in radius 23mm, 45mm and 57mm place; And

Fig. 8 A, Fig. 8 B and Fig. 8 C tabular respectively go out each parameter value that known disc measures in radius 23mm, 45mm and 57mm place.

100,200,212,300,312,400,420,500: substrate

102,202,210,302,306,402,406,414,418: the layer of pre-recording

104,204,208,308,504,408,412: the reflection horizon

106,206,310,410,506: cementing layer

108,312,508: cover plate

304,404,416: semi-reflective layer

Embodiment

Fig. 6 is the block flow diagram of making according to a preferred embodiment of the present invention disc.No matter be prerecorded DVD and recordable type DVD, the two all is to be about the substrate of 0.6mm and the cover plate gummed forms by two thickness.The making of prerecorded DVD (as scheming a left side) at first provides substrate, and this substrate for example forms in the mode of ejection formation, then forms at least one deck pre-record layer and reflection horizon on substrate in regular turn, and the reflection horizon for example forms by the mode of sputter.And after the reflection horizon forms, provide cover plate, and control cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm, wherein herein the preferred range of hyperbolic refractive index between between-the 10nm to 20nm.At last with cover plate and base plate bonding, to form a prerecorded DVD.

The making of the making of recordable type DVD and prerecorded DVD is close, and only difference is to form on the substrate is pre-record layer but not recording layer.

In the present embodiment, the technology of gummed mainly contains following five kinds: (1) rotary coating gummed method, (2) hot melt adhesive pressing gummed method, (3) screen printing gummed method, (4) patch gummed method, and (5) compression set method.Wherein, rotary coating gummed method mainly is to utilize the disc fast rotational that the UV glue in the disc is outwarded winding to the full wafer disc, re-uses the UV rayed and makes its drying.The method has advantages such as low cost of manufacture, control method be easy, but for the less stable of disc warpage, and is subjected to light, heat affecting easily and changes.

Hot melt adhesive pressing gummed method mainly is to utilize solid-state hot melt adhesive to heat into the melting state, and utilizes cylinder to be evenly distributed on the disc, afterwards pressurization, deburring again.The method has the easily advantage of control of mechanical property, but the method is equally for the less stable of disc warpage, and is subjected to light, heat affecting easily and changes.

Screen printing gummed method mainly is that UV glue is extracted on the web plate, utilizes scraper that UV glue is evenly distributed on the disc then, fits simultaneously and pressurizes after then using the UV rayed.The speed of production of the method is fast, mechanical property is easier to control, and the disc quality of being produced is more stable, but the process conditions of the method are more and complicated, and this also reacts on the technology cost.

Patch gummed method mainly is to utilize the patch of a similar double sticky tape, and substrate and cover plate are glued together.The mechanical property of the method is grasped easily, and its control method is simple and easy, and is applicable to the applying between any cover plate and the substrate, but the employed gummed board of the method is very expensive.

The compression set method mainly is to utilize the UV rayed on UV glue, so that the prepolymerization of UV glue then places the UV glue after the prepolymerization between cover plate and the substrate, and carry out pressing with pressuring method.And after the disc pressing, utilize a sheet metal pressing to suppress the phenomenon of warpage.The disc mechanical property of the method institute output is good, but the method has that cost is higher, qualification rate is lower, and UV glue is in the inconsistent shortcoming of the ductility of disc inner ring and outer ring.

Fig. 7 A, Fig. 7 B and Fig. 7 C tabular respectively go out each parameter value that the present embodiment disc measures in radius 23mm, 45mm and 57mm place; Fig. 8 A, Fig. 8 B and Fig. 8 C tabular respectively go out each parameter value that known disc measures in radius 23mm, 45mm and 57mm place.Fig. 7 A to Fig. 7 C glues together the front shroud hyperbolic at disc 1～disc 9, gummed front shroud warpage, gummed back shroud hyperbolic, gummed back shroud warpage, gummed metacoxal plate warpage, accelerated tests back shroud warpage, accelerated tests metacoxal plate warpage, and the measurement of accelerated tests front and back disc warpage variable quantity, and Fig. 8 A to Fig. 8 C glues together the front shroud hyperbolic at disc 10～disc 21, gummed front shroud warpage, gummed back shroud hyperbolic, gummed back shroud warpage, gummed metacoxal plate warpage, accelerated tests back shroud warpage, accelerated tests metacoxal plate warpage, and the measurement of accelerated tests front and back disc warpage variable quantity.

Whether above-mentioned accelerated tests mainly is weather-proof and design at disc, so the environmental baseline in the accelerated tests is called weather-proof condition.In the present embodiment, the weather-proof condition of accelerated tests is: about 80 ℃ of operating temperature, and operational humidity is about 85%, and about 50 hours of running time.

Please be simultaneously with reference to Fig. 7 A and Fig. 8 A, among Fig. 7 A, in disc 1～disc 9 manufacturing process, because the hyperbolic at gummed front shroud radius 23mm place is controlled at-10nm to 35nm between, so the warpage variable quantity of accelerated tests front and back disc is respectively-0.09 ,-0.18 ,-0.32 ,-0.22 ,-0.23 ,-0.16 ,-0.3 ,-0.19 and-0.35.Among Fig. 8 A, in disc 10～disc 21 manufacturing process, because the hyperbolic at gummed front shroud radius 23mm place is not through control, so the warpage variable quantity of disc is respectively 1.03,1.03,1.07,1.07,1.06,1.12,1.23,1.28,1.27,1.29,1.3 and 1.33 before and after the accelerated tests.More as can be known, the warpage variable quantity of disc 1～disc 9 before and after accelerated tests is much smaller than the warpage variable quantity of disc 10～disc 21 before and after accelerated tests by Fig. 7 A and Fig. 8 A.

Then please be, and Fig. 8 C simultaneously with reference to Fig. 7 B, Fig. 7 C, Fig. 8 B, by above-mentioned graphic in as can be known, the reduction phenomenon of warpage variable quantity can betide on the position of radius 45mm and 57mm equally before and after the accelerated tests.

In sum, disc manufacture method of the present invention has following advantage at least:

1. disc manufacture method of the present invention can be avoided disc, and factor does not produce warpage because of environment is good etc., promotes to some extent for the quality and the compatibility of disc.

2. disc manufacture method of the present invention can overcome disc and produce the unusual problem of mechanical property along with the time, makes increase the serviceable life of disc.

3. disc manufacture method of the present invention can be avoided disc warpage and damage the phenomenon of reading device.

Claims (12)

1. a disc manufacture method is characterized in that, this method comprises at least:

One substrate is provided;

On this substrate, form the layer of pre-recording;

Go up formation one reflection horizon in this layer of pre-recording;

One cover plate is provided, control this cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm; And

With this substrate and this cover plate gummed, to form a disc.

2. disc manufacture method as claimed in claim 1 is characterized in that, this substrate is to form with injection molding method.

3. disc manufacture method as claimed in claim 1 is characterized in that, this cover plate is to form with injection molding method.

4. disc manufacture method as claimed in claim 1 is characterized in that, this reflection horizon is to form with sputtering way.

5. disc manufacture method as claimed in claim 1 is characterized in that, the juncture of this substrate and this cover plate comprises rotary coating gummed method, hot melt adhesive pressing gummed method, screen printing gummed method, patch gummed method, and the compression set method.

6. disc manufacture method as claimed in claim 1 is characterized in that, more comprises the following steps: after this layer of pre-recording forms

Form a semi-reflective layer on this pre-records layer; And

Form one second and pre-record layer on this semi-reflective layer.

7. a disc manufacture method is characterized in that, this method comprises at least:

One substrate is provided;

On this substrate, form a recording layer;

On this recording layer, form a reflection horizon;

One cover plate is provided, control this cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm; And

With this substrate and this cover plate gummed, to form a disc.

8. disc manufacture method as claimed in claim 7 is characterized in that, this substrate is to form with injection molding method.

9. disc manufacture method as claimed in claim 7 is characterized in that, this cover plate is to form with injection molding method.

10. disc manufacture method as claimed in claim 7 is characterized in that, this reflection horizon is to form with sputtering way.

11. disc manufacture method as claimed in claim 7 is characterized in that, the juncture of this substrate and this cover plate comprises rotary coating gummed method, hot melt adhesive pressing gummed method, screen printing gummed method, patch gummed method, and the compression set method.

12. a cover plate is suitable for forming a disc with a base plate bonding, it is characterized in that, this cover plate in the hyperbolic refractive index at radius 23mm place between between-the 10nm to 35nm.

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