CN1407550A - Information record layer formation method and optical record media production - Google Patents
Information record layer formation method and optical record media production Download PDFInfo
- Publication number
- CN1407550A CN1407550A CN 02142239 CN02142239A CN1407550A CN 1407550 A CN1407550 A CN 1407550A CN 02142239 CN02142239 CN 02142239 CN 02142239 A CN02142239 A CN 02142239A CN 1407550 A CN1407550 A CN 1407550A
- Authority
- CN
- China
- Prior art keywords
- information recording
- recording layer
- photic zone
- die
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Manufacturing Optical Record Carriers (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
The present invention provides a method of manufacturing a multilayer optical disk that can suppress cost increase to the minimum and realize a large capacity. First, a first information recording layer is formed on a base plate. On the other hand, a light transmissive resin stamper having fine asperities (the second recording layer for transfer) and adhered together through the first ultraviolet-rays curable light transmissive layer. Then, removing the stamper, the second light transmissive layer is formed on the supper surface of the second information recording layer transferred and formed on the first light transmissive layer. The laser beam La is radiated from the second light transmissive layer to record and/or reproduce information signals on the first and the second information recording layers.
Description
Technical field
The present invention relates to a kind of formation method of information recording layer of optical recording media and the manufacture method that adopts the optical recording media of this formation method
Background technology
As a kind of form of the optical recording media of preserving audio frequency, video and other various information, extensively utilize the CD that for example comes the writing information signal by the impression hole.The citation form of CD as shown in figure 12, CD 2 is provided with the information recode layer 8 that has reflectance coating 6 on the forming board (back up pad) 4 in light transmission, is formed with the protective seam 12 that is formed by uv curing resin etc. thereon.On this CD 2, from coming information recording layer 8 is carried out reading of information signal as euphotic forming board 4 side irradiating laser La.
Information recording layer 8 adopts the injection molded method or is called the method formation (for example opening 2000-251335 referring to Japanese publication spy) of 2P method (Photo-Polymer method).
Under the situation that adopts the injection molded method, photoresist layer (emulsion) is set on the unshowned at first in the drawings glass disk and carries out cut, after developing, form the former dish of eurymeric sample (with the identical type sample of type sample of information recording layer when the device for testing light side is observed).Then, conducting film is set, forms nickel coating by so-called electroforming.Then, nickel coating is peeled off from glass disk, finished and have the minus sample the so-called nickel pressing mold (former pressing mold) of (with the concavo-convex opposite type sample of type sample of information recording layer when the device for testing light side is observed) through aftertreatment.With the nickel pressing mold of this minus sample, perhaps make stamper (eurymeric sample) with the nickel pressing mold, make sub-pressing mold (minus sample) by stamper again, be used to have the injection molded of the forming board 4 of eurymeric sample.
Under the situation that adopts the 2P method, utilize the nickel pressing mold (perhaps sub-pressing mold) of this minus sample, to being coated in the uv curing resin layer 4B Copy Info recording layer 8 on the substrate body 4A, solidify this uv curing resin layer 4B and at the information recording layer 8 of its copying surface from substrate body 4A side irradiation ultraviolet radiation.Because laser is from forming board 4 sides irradiations, so when the device for testing light side was observed, information recording layer 8 became the eurymeric sample.
Yet the spot diameter of laser La is more little, and the record density of CD 2 is high more.Spot diameter and λ/NA (λ: Wavelength of Laser, NA: the numerical aperture of object lens) proportional.Therefore,, must shorten the wavelength X of laser La, perhaps increase the numerical aperture NA of object lens in order to reduce spot diameter.
The wavelength X of the laser La of current use is 780nm in CD series, is 650nm in DVD series, is expected to use near the wavelength of 400nm of blue laser from now on, has shortened wavelength, and spot diameter just diminishes naturally, and recording density increases.
On the other hand,, can increase aberration if increase numerical aperture NA, in order after having increased numerical aperture NA, still to keep little aberration, the reduced thickness of photic zone (forming board 4) that just must be by laser La.
In the past, the photic zone of CD 2 (forming board 4) the resinous formed products that adopt by shapings such as injection molded methods more.But, under the prior art situation, forming board 4 to be made with this facture that thinner and precision is more preferably very difficult than present DVD.Promptly, current present situation is, in the CD as shown in figure 12 2 of the structure that uses as photic zone with forming board 4 (perhaps substrate body 4A+ resin bed 4B), adopt raising NA to improve recording density and on manufacturing technology, reach capacity with the means that realize high capacity.
To this, the improvement technology of two aspects is proposed.
The improvement of first aspect is to realize high capacity by the information recording layer multiple stratification.
For example in DVD-9, in structure shown in Figure 13, information recording layer is 2 layers.That is, formation first information recording layer 32 on first forming board (photic zone) 30, and by 34 coverings of semi-transparent film (translucent reflection horizon).With complete same method, (being downside in the drawings) forms second information recording layer 38 on second forming board (photic zone) 36, and by 40 coverings of reflectance coating (reflection horizon).First substrate 30 and the transparent adhesion means of second substrate, 36 usefulness (photic zone) 42 paste, and the information signal of first, second information recording layer 32,38 are read through first forming board 30 by the irradiation of laser La.The breath recording layer multiple stratification of like this, just can communicating by letter (the real area multiplication of information recording layer) realizes high capacity.
The improvement of second aspect only is to allow the higher NAization of laser La (spot diameter miniaturization) improve the recording density of the information signal in the information recording layer, realize high capacity, for example open flat 8-235638 communique or spy and open in the flat 11-203724 communique etc. and disclose correlation technique Japanese publication spy.Specifically, as shown in figure 14, the forming board 50 that does not need printing opacity is thickened formation as the substrate of CD body with the injection molded method, on this forming board 50, form information recording layer 54 simultaneously with reflection horizon 52, thereon, by the mode of bonding light transmission piece, perhaps adopt method laminations such as the resin-coating formation photic zone 56 as thin as a wafer of spin-coating method.
Laser La is from this thin photic zone 56 sides irradiation, and the information of information recording layer 54 is write and/or reads.Like this, owing to guaranteeing under the prerequisite of bulk strength, can form thinner photic zone in forming board 50 sides, so can realize the densification (high capacity) of the higher NAization of laser La aspect.
But, all have variety of problems respectively in above-mentioned improvement technology aspect first, second.
For example, improvement technology in above-mentioned first aspect is in " information recording layer multiple stratification ", multiple stratification can enlarge the area of the essence of recording layer at the present and the past really, but as existing, remain through the thicker forming board 30 of thickness each information recording layer is carried out access, be difficult to further improve the densification of one deck.
That is, can only expect that multiple stratification makes the capacity of area augmenting portion.Though the CD of information recording layer multiple stratification except that the above-mentioned type, has also proposed various types of multiple stratification CDs, all adopt from the formation of the thicker forming board side irradiating laser of thickness, can not break away from this problem.
On the other hand, even in the improvement technology of above-mentioned second aspect promptly " adopts through thin euphotic high NAization and realizes 1 layer densification (high capacity) ", specifically how to form so thin photic zone, still stayed variety of issue.
In general, as forming this thin euphotic method, proposed to go up the method for bonding transparent sheet or the method for employing spin-coating method application of resin at forming board (perhaps back up pad).
But the method for bonding transparent sheet has strict requirement to the optical characteristics and the thickness and precision of thin slice itself, increases cost easily.In addition, even the thickness and precision of transparent sheet is good, because bonding agent is in uneven thickness, apply the inhomogeneous changes in optical properties that causes, the result worsens optical disk property.Therefore, the coating of bonding agent also being had higher requirement, at present, also is the many methods of problem.
Again, form thin euphotic method, be difficult to keep the flatness on coated film surface, near peripheral part in any case the problem of inhomogeneous (protuberance) of coating liquid particularly all takes place easily by adopting the spin-coating method application of resin.As existing C D or DVD, when between laser optical system and the CD bigger interval being arranged, this protuberance can not become big problem, but because of high NAization makes under the less situation in gap between laser optical system and the CD, will become the obstacle that can not ignore.
In a word, under the situation that forms thicker overlay (for example 100 μ m), might enter into information recording area because the thickness of bump or the width of radial direction are very big, but so just may reduce posting field, reading all for the record of information signal to become obstacle.Sometimes also can become the reason that clashes between laser optical system and the CD again.
For the processing of this bump and keeping of coated surfaces flatness, for example open in many documents such as flat 11-203724,11-86355,11-86356 and all propose the various methods that tackle Japanese publication spy.But in other words, no matter which kind of concrete grammar all needs to carry out " certain processing ", can cause the numerous and diverse of manufacturing process like this and increase cost.
Summary of the invention
The objective of the invention is to the formation method and the manufacture method that provide a kind of information recording layer of particular significant effect aspect the novel optical recording media that solves above-mentioned existing issue according to the leap on the idea at one stroke making, even being replicated under the situation that has lighttight parts on the component side of a kind of information recording layer that will duplicate particularly is provided, the information recording layer that is replicated parts and surface thereof also can be cured with ultraviolet ray, and when can guarantee to comprise the high-freedom degree of the raw-material selection when making optical recording media, can realize that high capacity can prevent the technology of manufacturing optical recording media of the increase of cost again keeping under every layer the prerequisite of densification by multiple stratification.
The present invention solves above-mentioned problem by the formation method of the information recording layer of the optical recording media of proposition relevant following (1) formation.
(1) a kind of formation method of information recording layer of optical recording media is characterized in that comprising the steps:
On substrate, press the minus sample and form first information recording layer; Be produced on and have the duplicating of eurymeric sample on self the duplicate surface with second information recording layer and the resin moulding-die that forms with translucent resin; In the first information recording layer of aforesaid substrate side and duplicating under the state of facing mutually respectively with second information recording layer of above-mentioned resin moulding-die side, make aforesaid substrate and resin moulding-die integrated through the first ultra-violet solidified photic zone; From this resin moulding-die side irradiation ultraviolet radiation, make above-mentioned first photic zone and be replicated second information recording layer that duplicates on the face and solidify at it.
As mentioned above, on information recording layer, for example adopt spin-coating method with very thin thickness carry out resin coating, with this (thin) resin overlay as photic zone and from the method for this side irradiating laser, be the means that very are expected to that can improve every layer recording density tremendously.
But, if form thin photic zone separately, no matter adopt the method for bonding slide, still adopt the method for resin coating, as mentioned above, still exist many problems technically with on the cost.
The present invention is conceived to this point, to have solved this problem in this so-called reverse thinking and develop thinking mode that further forms second information recording layer above photic zone.
That is, further form under the situation of (duplicating) second information recording layer above the photic zone, this step above photic zone in the process of duplicating this second information recording layer, occurs pushing at this.This step can be also used as " means of guaranteeing the flatness above first photic zone ".
Be contained under the situation in the folded space of for example forming board (perhaps back up pad) and resin moulding-die becoming the first euphotic resin, there is no need to use slide, and the problems such as bad or protuberance of flatness above the overlay that can not take place will take place inevitably in the prior art.That is,, when forming first photic zone, can eliminate the various unfavorable conditions that exist inevitably in the prior art fully owing to be used for duplicating the effect (in other words realizing the more process of high capacity) of the pressing mold of this second information recording layer.
In addition, in the present invention, predetermined (approaching) second photic zone that forms on second information recording layer carries out laser radiation to first, second information recording layer state.Resin moulding-die has duplicating of minus sample usually and uses information recording layer, and relevant resin moulding-die of the present invention has duplicating with information recording layer this reason just of eurymeric sample.Its result, first, second information recording layer can both high NAization realizes high density recording based on making the photic zone attenuation.
Formation from this second photic zone side irradiating laser, also be because the present invention mainly was conceived to " even exist under the situation of light tight parts being replicated on the component side (the anti-resin moulding-die side of information recording layer) of the information recording layer that will duplicate, the information recording layer that is replicated parts and surface thereof also can be cured with ultraviolet ray " originally.
That is, in the present invention, resin moulding-die adopts translucent material to form, and forms first photic zone that is replicated parts by uv curing resin.Therefore, just can second information recording layer that duplicate on first photic zone and surface thereof be solidified from resin moulding-die side irradiation ultraviolet radiation.Therefore, even, 1) substrate forms with the non-light transmittance material in order to reduce cost; And 2) on the first information recording layer of read-only optical disc, form reflectance coating; Perhaps 3) first information recording layer of erasable optical disk itself has non-light transmission features, when solidifying first photic zone, the original step that just there is no need to adopt the sort of " from being replicated component side (being substrate-side) irradiation ultraviolet radiation " that general 2P method carries out can not produce any problem yet on making.
In addition, in this manual, " curing " might not be meant complete solidified meaning, and is meant that information recording layer or photic zone form the back at optical recording media and get final product at the state of reading Shi Buhui generation obstacle.
As improvement of the present invention distortion, for example, the scheme shown in following is arranged.
(2) in the formation method of the information recording layer of the optical recording media of being put down in writing in (1), it is characterized in that having in the wavelength coverage of material below the above 400nm of 300nm of resin moulding-die of described light transmission transmittance and be the characteristic more than 50%.
(3) in the formation method of the information recording layer of the optical recording media of being put down in writing in (1) or (2), it is characterized in that first photic zone after the described curing and the bonding force between the described resin moulding-die are than the bonding force between described first photic zone and the described substrate a little less than.
(4) in the formation method of the information recording layer of the optical recording media of being put down in writing in (3), it is characterized in that the strong or weak relation of described bonding force is realized by the material of selecting described substrate, first photic zone and resin moulding-die.
(5) in the formation method of the information recording layer of each optical recording media of putting down in writing of (1)～(4), it is characterized in that described resin moulding-die, on the radial direction outside portion of the information recording area of described second information recording layer, set convex shaped part; The part corresponding with described first this protuberance above euphotic is from the described substrate-side bias of facing of this information recording area above first photic zone.
(6) in the formation method of the information recording layer of each optical recording media of putting down in writing of (1)～(5), it is characterized in that further being included on second information recording layer of above-mentioned minus sample and form the second euphotic step, 2 layers the optical recording media that acquisition can be carried out writing of information signal and/or read described first, second information recording layer that is viewed as the eurymeric sample from this laser radiation side from this second photic zone side irradiating laser with spin-coating method.
(7) a kind of formation method of information recording layer of optical recording media is characterized in that repeating following steps: press the minus sample and form first information recording layer on substrate; Be produced on and have the duplicating of eurymeric sample on self the duplicate surface with information recording layer and the resin moulding-die that forms by translucent resin; At the first information recording layer of aforesaid substrate side with through the first ultra-violet solidified photic zone that described substrate and resin moulding-die is integrated as duplicating of above-mentioned resin moulding-die side with duplicating under the state of facing mutually respectively with information recording layer of second information recording layer; Come above-mentioned first photic zone and be replicated in its second information recording layer that is replicated on the face to solidify from this resin moulding-die side irradiation ultraviolet radiation; Remove described resin moulding-die on described first photic zone, to duplicate second information recording layer of residual minus sample; At described second information recording layer of described substrate-side with through ultra-violet solidified second photic zone that described substrate and resin moulding-die is integrated as duplicating of described resin moulding-die side with duplicating under the state of facing mutually respectively with information recording layer of the 3rd information recording layer; Come described second photic zone and be replicated in its 3rd information recording layer that is replicated on the face to solidify from this resin moulding-die side irradiation ultraviolet radiation; Remove described resin moulding-die on described second photic zone, to duplicate the 3rd information recording layer of residual minus sample; On (n-1) photic zone, duplicate the n information recording layer of residual minus sample.Thereby form n layer information recording layer.
(8) in the formation method of the information recording layer of the optical recording media of being put down in writing in (7), it is characterized in that further being included on the n information recording layer of upper of described minus sample and form the euphotic step of n with spin-coating method, acquisition can be carried out the n layer optical recording media that writes and/or read of information signal from this n photic zone irradiating laser to described the first～the n information recording layer that is viewed as the eurymeric sample from this laser radiation side.
(9) a kind of manufacture method of optical recording media, the optical recording media that the manufacture method that it is characterized in that comprising the steps: preparing to be put down in writing in two usefulness (6) or (7) is made is that the inboard is pasted together mutually and forms an optical recording media with separately substrate-side; Thereby obtain from becoming the two sides side irradiates light of one optical recording media, can carry out the double-sided multi-layer optical recording media that writes and/or read of information signal by side separately.
According to the present invention, particularly, when being replicated component side and having light tight parts of the information recording layer that will duplicate, be replicated parts with and the surface information recording layer can be with being cured by ultraviolet ray, on selecting, the material of making optical recording media can provide bigger degree of freedom, on the basis of keeping every floor height densityization, realize high capacity simultaneously, can effectively produce the optical recording media that can suppress Cost Growth to greatest extent by multiple stratification.
Description of drawings
Fig. 1 is near the major part section enlarged diagram of the formation the peripheral part of the suitable CD of the present invention of expression.
Fig. 2 makes the process chart of the step of substrate for expression.
Fig. 3 makes the process chart of the step of resin moulding-die for expression.
Fig. 4 makes the broad cross-section map of the die device of substrate for expression.
Fig. 5 makes the broad cross-section map of the die device of resin moulding-die for expression.
Fig. 6 constitutes the signal skiagraph of the whole bag of tricks of the first euphotic resin for the expression coating.
Fig. 7 is formed second information recording layer, is further formed the second euphotic process chart to carrying out shaping above this simultaneously by resin moulding-die for expression on first photic zone.
Fig. 8 guarantees the sectional drawing of other method example of the second euphotic planarization for expression.
Fig. 9 for expression only first euphotic above the sectional drawing of example of formation recess.
Figure 10 is the process chart of the step of the multiplayer optical disk of three layers of expression manufacturings.
Figure 11 is suitable for the local amplification profile diagram of the formation of two sides of the present invention multiplayer optical disk for expression.
Figure 12 is the local amplification profile diagram of the formation of the existing single-layer type CD of expression.
Figure 13 for expression with the overlapped amplification profile diagram of the major part that is used as the double-side type CD of formation shown in Figure 12.
Figure 14 amplifies disconnected sectional drawing for expression from the part of the conventional example of thin photic zone side irradiating laser.
Embodiment
Below embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is the sectional schematic diagram of the CD of the formation method manufacturing of the information recording layer of the relevant CD of the present invention (optical recording media) of expression employing.Back up pad) 104, the first information recording layer 108 that forms at this substrate 104 and first photic zone 110 that forms at this first information recording layer 108 this CD 102 comprises substrate (forming board: successively from the downside of figure.The thickness D1 of first photic zone 110 is about 20 μ m.On first photic zone 110, further form second information recording layer 114, on this second information recording layer 114, form second photic zone 116.The thickness D2 of second photic zone 116 is about 90 μ m.Laser La writes and/or reads the information signal on first, second information recording layer 108,114 from 116 irradiations of second photic zone.In addition, the peripheral part A1 place of each layer of CD 102 forms predetermined bending.
Below describe each several part in detail.
The formation of aforesaid substrate 104, first information recording layer 108 at first is described.
Its constitute and Figure 14 in forming board 50, reflection horizon 52 and the information recording layer 54 of the conventional example that illustrated substantially the same.With regard to concrete manufacture method, up to the present several method has been proposed also.At this, form according to step shown in Figure 2.
In Fig. 2, the example that expression is only write down in groove.So-called groove is meant the ditch portion in small concavo-convex nearly device for testing light side.This groove has some swings, the address when being used to write down (positional information of blank disc) a little.The part that overstriking symbol 120 expression swinging signals form in Fig. 2.
In addition, in instructions, as mentioned above, for simplicity, in final CD 102 the type sample of formed first, second information recording layer 108,114 when the device for testing light side is observed is referred to as the eurymeric sample, type sample in contrast is referred to as the minus sample.That is, swinging signal 120 is in the slot part of eurymeric sample, on the protuberance of minus sample.
In Fig. 2, at first on the former dish 122 of glass, photoresist layer (emulsion) 124 is set and carries out cut, be formed with the groove (eurymeric sample) (Fig. 2 (A)) of swing after developing.Then, conducting film is set, forms nickel coating 126 (Fig. 2 (B)) by so-called electroforming.
Then, this nickel coating 126 is stripped down from the former dish 122 of glass, implement aftertreatment and finish so-called former pressing mold 126M (Fig. 2 (C)) with minus sample.
Under the situation of the CD of the existing type of carrying out access from Figure 12, substrate-side shown in Figure 13, usually adopt this former pressing mold 126M, perhaps make stamper (eurymeric sample), make sub-pressing mold (minus sample) then, be used to produce substrate with eurymeric sample by former pressing mold 126M.
But, in the present embodiment owing to be not from substrate 104 sides but from second photic zone, 116 side irradiating lasers, so make female pressing mold 128 with eurymeric sample by this former pressing mold 126M.Former pressing mold 126M is implemented surface treatment, implement the electrolysis plating by electroforming after, peel off and form this mother's pressing mold 128 (Fig. 2 (D), (E)).The peripheral part A2 of this mother's pressing mold 128 with female pressing mold 128K, as shown in Figure 4, is fixed on the mould 160 as substrate towards substrate 104 lateral bending songs.In Fig. 4, symbol 162 is a fixed mould, and 164 is moveable die, and 166 is spring, and 168 is peripheral ring, and 170 is slot part, and 172 is annular convex.Use the section difference that forms by this slot part 170 and annular convex 172 to keep the bending of substrate with the peripheral part A2 of female pressing mold 128K.The resin that constitutes substrate 104 is injected into moveable die 164 and substrate with in the space folded between female pressing mold 128K and be shaped.
Turn back to Fig. 2, like this, keeping under the case of bending of substrate with female pressing mold 128K, peel off after in mould 160, filling the resin that constitutes substrate 104, finish the substrate 104 (Fig. 2 (F)～(H)) of small jog (information recording area) 132 with the minus sample that is equivalent to first information recording layer 108.On the peripheral part A3 of the small jog 132 on the substrate 104, form the dip plane 135 corresponding with described bending, towards the radial direction outside, the thickness of this peripheral part A3 is from the face attenuation gradually of information recording area 132.
Different with existing multiplayer optical disk, because substrate 104 there is no need to have light transmission, so the expanded range that material is selected can be selected material cheaply, the materials that perhaps more small concavo-convex formability is good etc. can suitably be selected according to the grade of the CD that will make etc.
At this, as shown in Figure 3, serve as that the basis makes the light-transmissive resin pressing mold 140 that is used for forming second information recording layer 114 in addition with this former pressing mold (perhaps sub-pressing mold) 126M.Specifically, at first, the peripheral part A4 that makes former pressing mold (perhaps sub-pressing mold) 126M is to a lateral bending song opposite with small jog 132 1 sides are arranged, and makes resin moulding-die with former pressing mold 126G, and is fixed in fixed mould 182 sides of mould 180 shown in Figure 5.Under this state, the resin that constitutes resin moulding-die 140 is injected into the moveable die 184 of this mould 180 and resin moulding-die with between the former pressing mold 126G and shaping, after peeling off, finish the resin moulding-die with small jog 142 140 (Fig. 3 (B), (C)) of the eurymeric sample that is equivalent to second information recording layer 114.
The maximum of this resin moulding-die 140 is characterised in that to be that pressing mold has eurymeric sample (that is, swinging signal 120 being arranged in slot part) again, and peripheral part A5 has the convex shaped part 140A (Fig. 3 (D)) that protrudes to duplicate surface side (first photic zone, 110 sides).
In addition, to go up the small jog 132 that forms with female pressing mold 128K identical for the shape that is used for duplicating the small jog 142 (duplicate and use second information recording layer) itself that is formed on second information recording layer 114 on this resin moulding-die 140 and the aforesaid substrate that is used for duplicating first information recording layer 108.
In addition, when the CD 102 of relevant present embodiment constituted read-only optical disc, small jog 132 was not a groove and become pre-pits, and forms reflectance coating on first information recording layer 108.
Illustrate that then the thickness that forms is about first photic zone 110 of 20 μ m on this first information recording layer 108.
Form the method for first photic zone 110, several method can be arranged, wherein representational 3 kinds of methods are shown in Fig. 6.
These three kinds of methods all belong under the state that the small jog 142 of first information recording layer 108 that makes substrate 104 sides and resin moulding-die 140 (duplicate and use second information recording layer) is faced respectively mutually through the first ultra-violet solidified photic zone 110 substrate 104 and resin moulding-die 140 incorporate operation categories.
Method shown in Fig. 6 (A) belongs to spin-coating method, and when allowing substrate 104 rotation, 150 the dip plane 152 resin P that drips scatters on whole of first information recording layer 108 along the gap, covers the above-mentioned resin moulding-die of making in addition 140 more thereon.
Method shown in Fig. 6 (B) is the drip resin P of scheduled volume of the substantial middle position on first information recording layer 108, pushes above-mentioned resin moulding-die 140 thereon, utilizes this pressing force, allows the resin P that drips flow through whole of first information recording layer 108.
Method shown in Fig. 6 (C) belongs to injection method, with the state of first information recording layer 108 face-off under pre-configured resin moulding-die 140, in both spaces of 140,108, inject first photic zone resin P.
For any method, its result utilizes the effect of resin moulding-die 140, can realize " duplicating " of the small jog 142 of top " shaping " of first photic zone 110 and second information recording layer 114 simultaneously.
At this, the resin P of inclosure is a ultraviolet curing resin, and resin moulding-die 140 is formed by translucent material, just can solidify first photic zone from resin moulding-die 140 side irradiation ultraviolet radiations.
That is in the clone method that is commonly referred to as the 2P method, be that the said substrate 104 1 side irradiation ultraviolet radiations of present embodiment are usual ways, from being replicated parts one side.
But, in the present embodiment, because substrate 140 sides at first photic zone 110, formed reflectance coating when constituting as read-only optical disc, formed lighttight first information recording layer 108 during as erasable optical disk, though so not impossibility from substrate 104 side irradiation ultraviolet radiations, the non-constant of efficient.At this, in the present embodiment,, adopt translucent resin as the material of resin moulding-die 140,140 side irradiation ultraviolet radiation B solidify first photic zone 110 from this resin moulding-die.Like this, can not waste the energy of irradiation, and ultraviolet irradiation system does not need the special equipment that maximizes yet.Specifically, if the following wavelength transmittance of the above 400nm of employing 300nm is the translucent resin more than 50%, just can obtain satisfied effect.
In addition, relevant same problem, if for example can be with heating someway as the substrate 104 that is replicated parts, adopting this substrate 104 also be effectively as the manufacture method of thermoset resin, at this moment carries out ultraviolet ray and has shone from being replicated component side with regard to not needing.But, consider in this field (optical recording media field), the equipment and the technical knowhow of solidifying ultraviolet curing resin with ultraviolet irradiation are very complete, cost is also low on making, and the reliability and the degree of freedom of (particularly to thermal deformation) when considering small concavo-convex on the duplicate surface that forms pressing mold and forming the convex shaped part of outer circumferential side, optimum method still forms pressing mold with " translucent resin " that have excellent moldability, shines the substrate 104 that solidifies by the ultraviolet curing resin shaping and use from the ultraviolet ray of die-side.
Shown in Fig. 7 (A), (B),, just form the small jog 142 of the minus sample that is equivalent to second information recording layer 114 in the above simultaneously if solidify first photic zone 110 from resin moulding-die 140 side irradiation ultraviolet radiation B like this.Therefore, if under this state, remove resin moulding-die 140, will stay the small jog 142 of the minus sample that is equivalent to second information recording layer 114 at topmost.
If observe from the device for testing light side, this second information recording layer 114 (minus sample) just has conduct second information recording layer 114 small concavo-convex of eurymeric sample.
In addition, if with the bonding force between first photic zone 110 and the resin moulding-die 140 than the bonding force between first photic zone 110 and the aforesaid substrate 104 a little less than, then be more prone to peel off resin moulding-die 140.Like this, though can be by between above-mentioned first photic zone 110 and above-mentioned resin moulding-die 140, applying the lubricating film that promotion is peeled off, perhaps applying bonding film on the contrary between above-mentioned first photic zone 110 and aforesaid substrate 140 realizes, but as described later shown in the embodiment, the selection by material realizes it being the most reasonable approach.
Form second photic zone 116 of about 90 μ m in the above.Form the method for second photic zone 116,, shown in figure (C), (D), adopt the spin-coating method manufacturing here though several method is arranged.
The shape of each layer peripheral part below is described.
As described in before this accompanying drawing, in the present embodiment, the corresponding part A 3 in the radial direction outside portion of the information recording area S1 of the top and first information recording layer 108 of substrate 104 (small jog 132) begins private side bias towards this substrate 104 from the part than information recording area S1, thereby makes the thickness attenuation of substrate 104.
Specifically, as mentioned above, form the bias of this substrate 104 by substrate with the curved shape of the peripheral part A2 of female pressing mold 128K, the thickness of substrate 104 is towards radial direction outside attenuation gradually, forms the dip plane 135 that the private side to this substrate 104 tilts.
On the other hand, this first photic zone 110 of the part A 6 corresponding with the radial direction outside portion of the information recording area S2 of the second top information recording layer 114 of first photic zone 110 also leans on to substrate 104 lateral deviations towards the radial direction outside gradually from the part of information recording area S2.Specifically, as Fig. 3, shown in Figure 7, convex shaped part 140A be set form this bias by outstanding on the peripheral part A5 of the information recording area S2 of second information recording layer 114 of resin moulding-die 140, and form this first photic zone 110 towards the radial direction outside gradually to dip plane 137 that substrate 104 lateral deviations are leaned on.
Therefore, if on first photic zone 110 that forms second information recording layer 114, form second photic zone 116 with spin-coating method, carrying out protrusion 160 that the resin coating time exists inevitably according to existing spin-coating method is just absorbed by the dip plane 137 of the peripheral part of this first photic zone 110 fully, even protrusion 160 itself exists, can not protrude (referring to Fig. 7 (D), Fig. 1) towards upside from the surface of the information recording area of second photic zone 116 yet.
Therefore, even do not carry out any aftertreatment, also can produce the CD 102 that can not produce special defective products.
[embodiment 1]
At this, the relevant curved shape of the peripheral part (outside portion) of each layer that utilizes is prevented that the experimental example that the top protuberance of second photic zone 116 takes place from describing.
In this experiment, (such as already explained) utilize the injection molded legal system to make substrate 104 and resin moulding-die 140.Being loaded into female pressing mold 128K and the resin moulding-die that the substrate of molding die 160,180 uses is groove record usefulness with former pressing mold or sub-pressing mold 126G, and gauge is 0.3 μ m.
For substrate 104, adopt polycarbonate resin (H4000-N282 that the エ of Mitsubishi Application ジ ニ ア リ Application グ プ ラ ス チ Star Network ス makes), 125 ℃ of mold temperatures, 360 ℃ of resin melt temperatures, 35 tons of mold clamping forces are made the substrate 104 of external diameter 12cm, thickness 1.1mm.
On the other hand, resin moulding-die 140 adopts olefin resins (ZEONEX-E28R that Japanese ゼ オ Application is made), 125 ℃ of mold temperatures, and 370 ℃ of resin melt temperatures, 35 tons of mold clamping forces are made the resin moulding-die 140 of external diameter 13cm, thickness 1.0mm.In addition, adopting olefin resin as the material of resin moulding-die 140 is in order to peel off (guaranteeing the bonding force relation weak than the bonding force between first photic zone 110 and the aforesaid substrate 104 between first photic zone 110 and the resin moulding-die 140) easily after duplicating second information recording layer 114, and guarantees that the interior transmittance of wavelength coverage below the above 400nm of above-mentioned 300nm is at the light transmission features more than 50%.
The peripheral shape of substrate 104 be the part (inclination) of thin thickness from from the position of outer circumference end 1.0mm, be 1.0mm at the thickness (tilt quantity) of the part (dip plane 135) of place, outer end thin thickness.Again, the peripheral shape of resin moulding-die 140 is the thick part of thickness from from the position of the outer circumference end 1.0mm of pairing optic disc base board, is 1.1mm at the thickness (protrusion amount) of the convex shaped part 140A at place, outer end.
When adopting these substrates 104, resin moulding-die 140 to make above-mentioned CD 102, the protrusion 160 of peripheral part can be not outstanding from the surface of second photic zone 116 of information recording area S1, S2 correspondence, and recessed 20 μ m.
In the present embodiment, because the thickness of first, second photic zone 110,116 by laser is respectively 20 μ m, 90 μ m, even so improve numerical aperture NA, also can keep little aberration, high NAization can improve every layer recording density more, compare with 2 stratotypes, can realize more high capacity from the type (type of Figure 13) of forming board 30 side irradiates lights.Even compare,, also can realize high capacity because the number of plies increases with 1 stratotype of existing (type of Fig. 4) of the same type again.
And because the curved shape at peripheral part place, even when second photic zone 116 adopts spin-coating methods to form, the protrusion 160 of coated surfaces is also not obvious as the protrusion of optical disc surface, does not therefore need planarization is carried out on these second photic zone, 116 surfaces.Like this, just can realize high capacity and cost degradation simultaneously.
In addition, in the above-described embodiments, though the thickness of first, second photic zone 110,116 is decided to be 20 μ m, 90 μ m respectively, the thickness of first, second photic zone 110,116 not only is defined in this thickness.But from the reliability consideration that CD is made, this euphotic thickness is minimum must be more than number μ m.Again, consider the optical system of high NAization, even in the maximum thickness that also preferably is suppressed at respectively about 40 μ m, 170 μ m.Be preferably 30 μ m respectively, below the 130 μ m.
Again, in the above-described embodiments, make the peripheral part bending of each layer,, also special unfavorable condition can not take place, but such curved configuration might not be necessary even adopt spin-coating method to form at second photic zone of topmost.
As mentioned above, originally propose method or technology that several employing spin-coating methods carry out planarization to the resin coated surfaces, in the present invention, when forming second photic zone, for example do not forbidden adopting a kind of in these schemes.
[embodiment 2]
In order to compare, according to waiting by the inventor and the parallel experiment of carrying out of the experiment of relevant the foregoing description 1, except peripheral part is the combination of the substrate (104) on plane (not forming the flexure type sample) and resin moulding-die (140), according to having made CD (102) with the same condition of the foregoing description 1, the protrusion of most peripheral (160) ratio will protrude 60 μ m corresponding to the surface of second photic zone 116 of information recording area (S2).Under this state, CD (102) might produce conflict with the laser device for testing light with unillustrated read-write among the figure, needs certain aftertreatment of enforcement.
But, for example as shown in Figure 8,, then pre-sizing R2 peripheral part A8 is in addition cut away if form final products how many bigger size R1 than CD 202 itself, adopt such method just can address this is that.
Again, also can be on second photic zone 216 mounting as the surface smoothing glass plate 221 (referring to the imaginary line of Fig. 8) of imaginary pressing mold planarization is carried out on the surface, can also adopt the bonding mode of resin sheet.
The CD that adopts the present invention to make, existing either side for relevant high capacity is improved technology, all has the high added value of clear superiority, and the relevant first euphotic formation, because do not exist any technical problem just can make, so in fact can raise the cost hardly.Therefore, only about second photic zone, even adopt and the same processing of prior art, the relevant cost burden also can " relatively " significantly reduce.
Therefore, making under the situation of the so-called highest CD of high reliability more,, also can adopt other suitable method for the second euphotic processing.
In addition, except the having or not of flexure type sample, the formation of each layer is identical with previous embodiment among Fig. 8, and following two bit signs identical or similar portions and previous embodiment adopt identical symbol among the figure, and omit repeat specification.
In addition, in the above-described embodiments, not only on first photic zone 110, and on substrate 104, also be formed with dip plane 135 on the peripheral part, but, as shown in Figure 9, only on first photic zone 110, form bias portion (dip plane) 137 on the peripheral part, just can prevent generation protuberance 160 on second photic zone 116 according to condition.Therefore, if bottom line forms bias portion on the peripheral part on first photic zone 110, so just not necessarily need on the peripheral part of following laminar substrate 104A, form bias portion.
Again, the shape of bias portion is not limited to simple dip plane, as long as can prevent the protuberance of peripheral part above the spin coating, for example according to allow the experimental result of spin coating flattening surface determine that the degree of depth of this bias portion and shape get final product as far as possible.
On the other hand, as needs are formed thin resin overlay above carry out smooth shaping method, the function of utilization of the present invention pressing mold at this moment forms further information recording layer thereon.Therefore, this method is got up continuously, just can easily produce the multi-layer recording medium more than 3 layers.
For example, in order to make 3 layers of optical recording media, as shown in figure 10, only need set gradually substrate 304, at the first information recording layer 308 that forms on this substrate 304, at first photic zone 310 that forms on this first information recording layer 308, at second information recording layer 314 that forms on this first photic zone 310, at second photic zone 316 that forms on this second information recording layer 314, at the 3rd information recording layer 322 that forms on second photic zone 315, the 3rd photic zone 324 that on the 3rd information recording layer 322, forms; From the 3rd photic zone 324 side irradiating laser La, above-mentioned first, second, third information recording layer 308,314,322 is carried out writing and/or reading of information signal.
In order to duplicate each information recording layer, use the resin moulding-die 340,350 identical respectively with above-mentioned resin moulding-die 140.At this moment, need only formation dip plane 339 on second photic zone 316.The existence of dip plane 339 can absorb protrusion 360.
Further, the same fully overlapping number of times that increases can be made the n layer optical recording media more than 3 layers.In the present invention, owing to solidify ultra-violet solidified photic zone, be simple repetitive operation from resin moulding-die side irradiation ultraviolet radiation, can form the information recording layer of random layer in theory.
Specifically, repeat the information recording layer that following steps just can form the n layer: promptly, on substrate, press the minus sample and form first information recording layer; Be produced on and have the duplicating of eurymeric sample on self the duplicate surface with information recording layer and the resin moulding-die that forms by translucent resin; At the first information recording layer of aforesaid substrate side with through the first ultra-violet solidified photic zone that described substrate and resin moulding-die is integrated with binding function as duplicating of above-mentioned resin moulding-die side with duplicating under the state of facing mutually respectively with information recording layer of second information recording layer; Come above-mentioned first photic zone and be replicated in its second information recording layer that is replicated on the face to solidify from this resin moulding-die side irradiation ultraviolet radiation; Remove described resin moulding-die on described first photic zone, to duplicate second information recording layer of residual minus sample; At described second information recording layer of described substrate-side with through ultra-violet solidified second photic zone that described substrate and resin moulding-die is integrated with binding function as duplicating of described resin moulding-die side with duplicating under the state of facing mutually respectively with information recording layer of the 3rd information recording layer; Come described second photic zone and be replicated in its 3rd information recording layer that is replicated on the face to solidify from this resin moulding-die side irradiation ultraviolet radiation; Remove described resin moulding-die on described second photic zone, to duplicate the 3rd information recording layer of residual minus sample; On (n-1) photic zone, duplicate the n information recording layer of residual minus sample.
Form the n photic zone of topmost in the above, from this n photic zone side irradiates light, just can to above-mentioned first, second ... the n information recording layer carries out writing and/or reading of information signal, thereby can obtain the CD of n layer.
In addition, identical with 2 layers situation, even multilayer constitutes, as long as peripheral part is partial to more following one deck lateral deviation on (n-1) is euphotic, the protrusion that is produced when forming uppermost n photic zone with spin-coating method is just not obvious.But, when (n-1) euphotic thickness (in order to absorb the portion of having fallen) is too thin, as above-mentioned embodiment, just need be from the layer beginning bias more.If from below layer beginning bias more, even (n-1) photic zone is thin, also can form big bias (in case of necessity want than (n-1) euphotic thickness big bias) above the photic zone at (n-1), thus the protuberance can fully absorb the n photic zone and form the time.
Even under the situation of making the CD of single face more than 3 layers, as the License Value of each the euphotic thickness that is used for forming CD, the n photic zone is below the 170 μ m, preferably below the 130 μ m, other photic zone is below the 40 μ m, and preferably below the 30 μ m, 2 layers situation is not special to be changed.
But in the time of more than 3 layers, if each euphotic thickness is too thick, the formation position of initial first information recording layer can be away from the end face of rayed side.Therefore, say qualitatively that the CD that cans be compared to most 2 layers will approach, actual License Value gets final product than above-mentioned value low 30%～70% respectively.
Again, the light transmission features of resin moulding-die transmittance under the wavelength coverage below the above 400nm of 300nm is preferably more than 50%, and the situation of this point and 2 layers is not special to be changed.
At last, as shown in figure 11, prepare 2 multi-layer recording mediums of making like this (402A and 402B), with separately substrate 404A, 404B side is that the inboard is bonded, and just can manufacture can be from 402 liang of surface irradiation laser La of CD and carry out the double-sided multi-layer CD 402 that writes and/or read of information signal from a side separately.
If what form substrate 404A, 404B thinnerly (about 0.6mm), CD 402 overall thickness can keep identical with the single-sided discs that this illustrates before.
This double-sided multi-layer CD 402 is different with existing both-sided optical disc, can carry out access to each information recording layer from thin photic zone side, every layer recording density can keep reaching the CD level of Figure 14, every multiple stratification, and form on the two sides, so can constitute the CD of capacity maximum level so far.
In addition, the formation of each layer, because identical with previous embodiment, back two of identical or similar part and previous embodiment are adopted identical symbol among the figure, and omit repeat specification.
Claims (13)
1. the formation method of the information recording layer of an optical recording media is characterized in that comprising as following steps:
On substrate, press the minus sample and form first information recording layer;
Be produced on and have duplicating of eurymeric sample on self the duplicate surface and use second information recording layer, and the resin moulding-die that forms with translucent resin;
In the first information recording layer of aforesaid substrate side and duplicating under the state of facing mutually respectively with second information recording layer of above-mentioned resin moulding-die side, make aforesaid substrate and resin moulding-die integrated through the first ultra-violet solidified photic zone;
From this resin moulding-die side irradiation ultraviolet radiation, make above-mentioned first photic zone and be replicated second information recording layer that duplicates on the face and solidify at it.
2. the formation method of the information recording layer of optical recording media according to claim 1 is characterized in that the wavelength coverage of material below the above 400nm of 300nm of the resin moulding-die of described light transmission has transmittance in the characteristic more than 50%.
3. the formation method of the information recording layer of optical recording media according to claim 1, it is characterized in that first photic zone after the described curing and the bonding force between the described resin moulding-die are than the bonding force between described first photic zone and the described substrate a little less than.
4. the formation method of the information recording layer of optical recording media according to claim 2, it is characterized in that first photic zone after the described curing and the bonding force between the described resin moulding-die are than the bonding force between described first photic zone and the described substrate a little less than.
5. the formation method of the information recording layer of optical recording media according to claim 3 is characterized in that the strong or weak relation of described bonding force is realized by the material of selecting described substrate, first photic zone and resin moulding-die.
6. the formation method of the information recording layer of optical recording media according to claim 4 is characterized in that the strong or weak relation of described bonding force is realized by the material of selecting described substrate, first photic zone and resin moulding-die.
7. according to the formation method of the information recording layer of each described optical recording media in the claim 1～6, it is characterized in that described resin moulding-die, on the radial direction outside portion of the information recording area of described second information recording layer, set convex shaped part and euphotic with described first above the corresponding part of this protuberance from this information recording area above first photic zone towards described substrate-side bias.
8. according to the manufacture method of each described optical recording media in the claim 1～6, it is characterized in that further being included on second information recording layer of described minus sample and adopt spin-coating method to form the second euphotic step; Can be thereby obtain from this second photic zone irradiating laser to observe 2 layers the optical recording media that described first, second information recording layer of becoming the eurymeric sample carries out writing of information signal and/or reads from this laser radiation layer.
9. the manufacture method of optical recording media according to claim 7 is characterized in that further being included on second information recording layer of described minus sample and adopts spin-coating method to form the second euphotic step; Can be thereby obtain from this second photic zone irradiating laser to observe 2 layers the optical recording media that described first, second information recording layer of becoming the eurymeric sample carries out writing of information signal and/or reads from this laser radiation layer.
10. the formation method of the information recording layer of an optical recording media is characterized in that repeating following steps:
On substrate, press the minus sample and form first information recording layer;
Be produced on and have the duplicating of eurymeric sample on self the duplicate surface with information recording layer and the resin moulding-die that forms by translucent resin;
At the first information recording layer of aforesaid substrate side with through the first ultra-violet solidified photic zone that described substrate and resin moulding-die is integrated as duplicating of above-mentioned resin moulding-die side with duplicating under the state of facing mutually respectively with information recording layer of second information recording layer;
Come above-mentioned first photic zone and be replicated in its second information recording layer that is replicated on the face to solidify from this resin moulding-die side irradiation ultraviolet radiation;
Remove described resin moulding-die on described first photic zone, to duplicate second information recording layer of residual minus sample;
At described second information recording layer of described substrate-side with through the second ultra-violet solidified photic zone that described substrate and resin moulding-die is integrated as duplicating of described resin moulding-die side with duplicating under the state of facing mutually respectively with information recording layer of the 3rd information recording layer;
Come described second photic zone and be replicated in its 3rd information recording layer that is replicated on the face to solidify from this resin moulding-die side irradiation ultraviolet radiation;
Remove described resin moulding-die on described second photic zone, to duplicate the 3rd information recording layer of residual minus sample;
Thus, on (n-1) photic zone, duplicate the n information recording layer of residual minus sample, and form the information recording layer of n layer.
11. the manufacture method of optical recording media according to claim 10 is characterized in that further being included on the n information recording layer of upper of described minus sample and adopts spin-coating method to form the euphotic step of n;
Can be thereby obtain from this n photic zone irradiating laser to observing the optical recording media that described the first～the n information recording layer that becomes the eurymeric sample carries out the n layer that writes and/or read of information signal from this laser radiation layer.
12. the manufacture method of an optical recording media is characterized in that preparing 2 optical recording medias that adopt the described manufacture methods of claim 8 to make, and is that the inboard fits together mutually and forms 1 optical recording media with separately substrate-side;
Thereby obtain to carry out side separately from the two sides irradiates light that makes 1 optical recording media the optical recording media of the double-sided multi-layer that writes and/or read of information signal.
13. the manufacture method of an optical recording media is characterized in that preparing 2 optical recording medias that adopt the described manufacture methods of claim 11 to make, and is that the inboard fits together mutually and forms 1 optical recording media with separately substrate-side;
Thereby obtain to carry out side separately from the two sides side irradiates light that makes 1 optical recording media the optical recording media of the double-sided multi-layer that writes and/or read of information signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001260029 | 2001-08-29 | ||
| JP2001260029A JP2003067990A (en) | 2001-08-29 | 2001-08-29 | Forming method of information recording layer on optical recording medium, and manufacturing method of optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1407550A true CN1407550A (en) | 2003-04-02 |
| CN1280807C CN1280807C (en) | 2006-10-18 |
Family
ID=19087293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02142239 Expired - Fee Related CN1280807C (en) | 2001-08-29 | 2002-08-27 | Information record layer formation method and optical record media production |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2003067990A (en) |
| CN (1) | CN1280807C (en) |
| TW (1) | TWI224333B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114482B (en) * | 2006-07-27 | 2010-04-07 | 株式会社名机制作所 | Optical disk substrate, forming mold, blue-ray disk and manufacturing method thereof |
| CN101261853B (en) * | 2007-03-06 | 2010-08-11 | 太阳诱电株式会社 | Optical information recording medium and manufacturing method thereof |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005067055A (en) * | 2003-08-26 | 2005-03-17 | Tdk Corp | Mold, substrate for optical disk, and optical disk |
| JP2005085403A (en) * | 2003-09-10 | 2005-03-31 | Tdk Corp | Manufacturing method of disk-shaped recording medium and stamper member usable for manufacturing method of disk-shaped recording medium |
| JP4514582B2 (en) * | 2003-11-12 | 2010-07-28 | 三菱化学メディア株式会社 | Method of manufacturing optical recording medium and light transmissive stamper |
| TWI327726B (en) | 2005-03-11 | 2010-07-21 | Origin Electric | Optical disk manufacturing apparatus |
| JP4554405B2 (en) * | 2005-03-11 | 2010-09-29 | オリジン電気株式会社 | Optical disc manufacturing apparatus and manufacturing method |
| JP2007294076A (en) * | 2006-03-31 | 2007-11-08 | Mitsubishi Kagaku Media Co Ltd | Method and apparatus for manufacturing optical recording medium |
| JP5337365B2 (en) * | 2007-10-18 | 2013-11-06 | 出光興産株式会社 | Aromatic polycarbonate resin composition for resin stamper, method for producing resin stamper, and resin stamper |
| JP6811442B2 (en) | 2016-03-17 | 2021-01-13 | パナソニックＩｐマネジメント株式会社 | Optical disc recording medium |
-
2001
- 2001-08-29 JP JP2001260029A patent/JP2003067990A/en not_active Withdrawn
-
2002
- 2002-08-15 TW TW91118446A patent/TWI224333B/en not_active IP Right Cessation
- 2002-08-27 CN CN 02142239 patent/CN1280807C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114482B (en) * | 2006-07-27 | 2010-04-07 | 株式会社名机制作所 | Optical disk substrate, forming mold, blue-ray disk and manufacturing method thereof |
| CN101261853B (en) * | 2007-03-06 | 2010-08-11 | 太阳诱电株式会社 | Optical information recording medium and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI224333B (en) | 2004-11-21 |
| CN1280807C (en) | 2006-10-18 |
| JP2003067990A (en) | 2003-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1225733C (en) | Mfg. method of optical information recording medium, its mfg. appts. and optical information recording medium | |
| CN1197066C (en) | Optical recording medium and optical disc apparatus | |
| CN1175408C (en) | Optical information recording medium and producing method thereof | |
| CN1394332A (en) | Optical recording medium, optical recording medium production method, optical recording medium production apparatus, program and medium | |
| CN1280807C (en) | Information record layer formation method and optical record media production | |
| CN1495746A (en) | Optical data recording medium and making method, and clamping said medium method | |
| EP1434211A1 (en) | Stamper for manufacturing optical recording medium, method for forming information recording area and light transmitting layer, and optical recording medium | |
| CN1191578C (en) | Disk-like multilayer information recording medium and production method thereof | |
| CN1240064C (en) | Method for producing optical information recording medium | |
| CN1224025C (en) | Optical disk and method for mfg. same | |
| CN1324074A (en) | Optical recording medium | |
| CN1251213C (en) | Optical recording medium | |
| US7844984B2 (en) | Optical recording medium and manufacturing method thereof | |
| CN101061541A (en) | Optical disk and method for manufacturing optical disk | |
| CN1755814A (en) | Optical disc and optical disc device | |
| CN1220194C (en) | Moulding die, mould system, recording medium base plate, recording medium, optical disc base plate, optical disc, moulding die making method | |
| CN1768382A (en) | Optical recording medium and process for producing the same | |
| US20070210467A1 (en) | Apparatus for fabricating cover layer of optical information storage media and operating method of the same | |
| TWI294125B (en) | Manufacturing method of cover layer of optical information storage media | |
| JP2006196146A (en) | Optical disk and manufacturing method of optical disk | |
| CN1732524A (en) | Magnetic disk substrate and optical disk | |
| CN1266683C (en) | Testing disc | |
| JP4306705B2 (en) | Optical disc and optical disc manufacturing method | |
| CN1246850C (en) | Optical disk and method for mfg. same | |
| CN100342439C (en) | Method for producing optical information storage media and template separating codition decision method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061018 Termination date: 20210827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |