TW200905671A - Light information recording medium - Google Patents

Abstract

The invention provides a recordable optical information recording medium for recording and regenerating through irradiating short wavelength laser. On the substrate, the recordable optical information recording medium includes an orbit such as guiding groove formed by a slot, and an optical recording layer taking the organic pigment material as the main material, can record information through irradiating short wavelength laser from the optical recording layer side, and can read the change of reflecting light of short wavelength laser to regenerate the information; the recording polarity of the recordable optical information recording medium is LTH type, the refractive index n ranges from 1.2 to 2.1 when the optical recording layer is not recorded, the attenuation quotient k ranges from 0.01 to 0.7, and n+k ranges from 1.4 to 2.1; the recordable optical information recording medium carries out recording and regenerating through irradiating short wavelength laser.

Description

200905671 IX. Description of the Invention: [Technical Field] The present invention relates to an optical information recording medium which can be recorded and reproduced by irradiating short-wavelength laser light. [Prior Art] As an optical information recording medium using an organic dye as a recording material, there is a recordable optical information recording medium. The recordable optical information recording medium uses a so-called red laser light to record information and reproduces the recorded information. The red laser light irradiates the semiconductor laser light having a wavelength of 75 0 to 830 nm. . Then, a recordable CD (C〇mpaCt disk, CD) with a recording capacity of 650 MB or 700 MB (so-called CD-R (Compact disk - Recordable)) has been developed. Then, developed a digital versatile disc (so-called DVD-R/+R) that uses shorter wavelength red laser light with a wavelength of 640 to 680 nm. The capacity is 4.7 GB. In turn, the aforementioned CD-R or DVD-R/+R has been widely used. The above recording polarity is a High to Low type (hereinafter referred to as "HTL type"). Specifically, the above-mentioned High to Low type refers to a type in which the reflectance of the pre-formed portion of the pit in the unrecorded state is high, and the reflectance of the pit portion formed after recording becomes low. As a larger light information recording medium, a light disc that can be recorded and reproduced using so-called blue-violet laser light is currently being developed. The wavelength of the blue-violet laser light is shorter than the wavelength of the previous red laser light, which is 350. Laser light of ~500 nm (for example around 405 nm). In 2, 6 years, 128792.doc 200905671 HD (High Definition) DVD-R has been commercialized, using laser light with a wavelength of 405 nm for recording or reproduction, and recording capacity of 15 in a single layer. An organic pigment is used in the GB light recording layer. Moreover, a recordable inorganic blue light disc (so-called BD-R (BIu-ray Disc-Recordable)) has also been commercialized, and it uses a laser light having a wavelength of 405 nm for recording or reproduction, and can further increase the single An inorganic material is used in the optical recording layer of the recording capacity of the layer. These organic HD DVD-R and inorganic BD_R are recorded along the groove in the same manner as dvd_r/+r. Then, the organic recording polarity is Low to High (hereinafter referred to as "lth type"). Specifically, the above-mentioned L〇w to High type refers to a type in which the reflectance of the pre-formed portion of the pit in the unrecorded state is low, and the reflectance of the pit portion formed after recording becomes high. In contrast, the recording polarity of the recordable inorganic Blu-ray disc is the same as that of the DVD-R/+R. As shown in Fig. 1, a commercially available HDDVD_R uses a disk-shaped substrate 2' on which a groove 7 as a guide groove is formed on the main surface of the substrate. A portion between the groove 7 of the substrate 2 and the groove 7 is referred to as a land 8. The optical recording layer 3 and the light reflecting layer 4 are sequentially formed on the upper surface of the disk-shaped substrate 2 on which the grooves are formed. On the upper surface of the light reflecting layer 4, a dummy substrate 6 which also serves as a protective layer is laminated via the bonding layer 5. In the rib surface 1 optical disc 1 obtained by the above method, the laser light 9 is irradiated to the optical recording layer 3 along the groove 7 which is spirally formed on the substrate 2 as a guide groove, thereby recording. HD DVD-R recorded along the groove 7! * 丄u R The reproducing method of the optical disc 1 is as follows: the laser light 9' is irradiated along the groove 7 and the recording signal is read from the reflected light of the laser light 9, that is, '(10)' regeneration is performed along the groove . The above HD DVD-128792.doc 200905671 R type of disc 1 is the reflectance of the pre-formed portion of the pit in the unrecorded state.

Low (Low)' and the LTH type in which the reflectance of the pit portion after recording becomes high (High). For example, Patent Document 1 discloses an HD DVD-R in which an organic dye is used in a content recording layer and a recording and reproducing quality in a wavelength band of short-wavelength laser light is high, and the above-mentioned optical recording layer is formed using an organic dye. The maximum absorption wavelength region of the dye is on the longer wavelength side than the wavelength of the short-wavelength laser light irradiated onto the optical recording layer, and the organic dye has an anion portion and a cationic portion. [Patent Document 1] Japanese Laid-Open Patent Publication No. H05-297406 (Patent Document 1) discloses a recordable organic Blu-ray disc (hereinafter referred to as "organic BD_R") using an organic dye in an optical recording layer. In the organic bd_ru, the light reflecting layer 4, the optical recording layer 3, and the protective layer 5 are sequentially formed on the upper surface of the disk-shaped substrate 2 on the side where the guide grooves are formed. Further, the cover layer 6b is attached to the upper layer 6a and the upper layer 6a. The guide groove formed on the substrate 2 in such an organic bd_n is a groove 7', and is formed in the groove 7, and the portion between the groove 7 and the groove 7 is a land & By irradiating the laser light 9 to the optical recording layer 3 (viewing the land from the laser light irradiation side) or the land 8 recording layer 3 as a groove from the laser light irradiation side n, 4 slots 7' to record the organic BD_R disc 11 / as follows. The laser light 9 is irradiated along the groove 7', and the recording signal is read from the reflected light of the laser "9". As we all know. It is true... "There are specializations of the following inventions, and short-wave in;; firstly, the organic high-density laser light in the wavelength band of the organic color wavelength is used in the recording layer. 128792.doc 200905671 bd:r' prescribed light The refractive index (8) of the recording layer when it is not recorded, the attenuation coefficient (k) when it is not recorded, and the amount of change of the reading before and after the recording, that is, the range of Δk. [Patent Document 2] Japanese Patent Laid-Open Publication No. Hei. No. 2-3-3344. However, the recording polarity of the organic BD-R of Patent Document 2 is high, and the reflectance of the pre-formed portion of the pit not recorded is high, and after recording The HTL type in which the reflectance of the pit portion becomes low. For the organic BD-R using an organic dye in the optical recording layer, the attenuation coefficient (k) at the time of unrecording of the optical recording layer is increased in order to improve the recording sensitivity, thereby absorbing a large amount of laser light, and thus advantageous. However, the problem that the attenuation coefficient k at the time of unrecording of the above optical recording layer cannot be increased should be improved. The inventors of the present invention thought that it is preferable to record the polarity characteristics in the same manner as in the case of the organic HD dvd_r in the patent document 2, and to increase the pigment film == large absorption efficiency. The recording, that is, from the side of the laser light irradiation, is recorded as a recording of the groove from the substrate side. The present invention has been completed by further developing a novel organic BD_R based on the above findings. The above-mentioned organic BD_R land station records and the type H is different from the previously recordable medium having the recording polarity of the HTL type. Therefore, it is necessary to ensure performance by designing with the pre-recorded W and the disc shape. "The material design of the money--the previous person organically adopts the HTL type recording method. When the recording is reproduced after recording, the reflectance of the reproduced signal is recorded in the mode of (4) lower ~ lower than the aspect 'in the shape of the under the shape' When the reproduction is performed after recording, the reflectance of the signal of the regeneration of 128,792.doc 200905671 is increased, @this, the situation cannot be pursued when tracking. SUMMARY OF THE INVENTION The present invention relates to a novel recordable optical information recording medium having an LTH type recording polarity and using an organic dye and an organic BD_R. In particular, it is an object of the present invention to provide a recording type optical recording medium which does not fail to follow an organic BD-Han and other recordings when the track having the guide groove is tracked in the LTH type. Further, it is an object of the present invention to provide an optical information recording medium which can improve the recording sensitivity at the time of recording and reduce the recording power. Further, an object of the present invention is to provide a recordable optical information recording medium such as an organic BD_R which is improved in signal quality deterioration, i.e., a problem of deterioration in modulation degree, and the signal quality is used to indicate the reproduction accuracy of a recording signal. Further, the present invention has an object of providing a recording medium which can finally perform high speed, large capacity, and high precision by irradiating short-wavelength laser light. * 生光光 The development focus of the inventors and the like is on the recording polarity of the lth type when the land is recorded, and not the recording polarity of the previous HTL type. Then, the inventors of the present invention have found that by making the n+k associated with the refractive index (8) and the attenuation coefficient (k) of the optical recording layer 21 or less, the degree of modulation can be avoided and can be avoided. The present invention was finally completed by recording the problem that the LTH dragon recorded difficulty τ was easily caused by the increase in reflectance. A first technical means of the present invention is a recordable optical information recording medium having a spiral or annular groove formed on a surface of a disk-shaped substrate, and above the groove of 128792.doc -10- 200905671 On the surface side, an optical recording layer mainly composed of an organic pigment material is formed, and information is recorded by the short-length laser light from the upper surface side of the optical recording layer along the groove surface. After recording the above information, the information can be borrowed. The information is reproduced by the change of the reflected light of the short-wavelength laser light. The recording polarity of the second recording layer is LTH type, and the refractive index η of the optical recording layer when unrecorded is in the range of 1.2 to 2.1, and the attenuation coefficient is k. The above object is achieved by the above configuration, in the range of 〇〇1 to 〇7, and n+k is in the range of 1.4 to 2.1. According to the first technical means, it is possible to provide a recordable optical information recording such as organic BD_R, "refractive index n for the optical recording layer, and attenuation of the touch: n + k is 2.1 or less, so that n is between! 2~2! The Fan Park makes 匕 between my range 'so' allows the regenerated laser light to accurately follow the recorded obedience 'satisfaction' and after recording by irradiating short-wavelength laser light Regeneration is performed by irradiating short-wavelength laser light. In particular, the optical recording layer is provided with an optical thickness of an appropriate organic dye, whereby the refractive index n can be made smaller than 2" and n + k can be limited to the range of 丨 4 to 2 ι. As a result, tracking can be well ensured. By making the refractive index η of the optical recording layer equal to or smaller than 21, the optical recording layer can have an appropriate optical film thickness. The optical recording layer can also have an appropriate optical film thickness by making the refraction "equal to or greater than 12. The attenuation coefficient k of the optical recording layer can be equal to or greater than 〇〇1, and the optical recording layer can reach the field light amount of the filling knife. Therefore, the recording sensitivity at the time of recording can be improved, and the recording power can be lowered. Further, by making the attenuation coefficient k equal to or smaller than 〇, 7, the optical recording layer does not excessively absorb the laser light, so that the detector can be omitted. Further, according to the first technical means described above, the second technical means of the present invention further provides a light information recording medium, wherein the optical recording layer contains a machine material film and the light The optical density (〇D (optical density)) of the recording layer at the maximum wavelength is 〇3 or less. The above object is achieved. According to the second technical means, the optical density of the optical recording layer at the maximum wavelength is absorbed. (0D value) is adjusted to 〇.3 or less, whereby the optical recording layer can be made to have an optical film #. In combination with the jth technical means, the appropriate film thickness of the optical recording layer is set. , can provide - organic BD-R The recordable optical information recording medium 'reproduces the laser light in the 可 可 可 可 可 可 可 可 可 I I k ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' Further, according to the first or second technical means, the third technical means of the present invention further provides a light information recording medium in which the wavelength of the new wavelength field of the information is recorded and reproduced. 3 5 〇 5 5 nm laser light, thereby achieving the above object. According to the third technical means, it is possible to provide recording, reproduction, and high speed and high precision by short-wavelength laser light. Optical Information Recording Medium. [Embodiment] An outline of the configuration of the present invention will be described with reference to Fig. 2. In the organic bD-R^ of the present invention, a spiral j guiding groove 9 is formed on one surface of a disk-shaped substrate 2 having a thickness of _. The side upper surface of the guiding groove is sequentially formed with a light reflecting layer 4, an optical recording layer 3, and a protective layer 5. It is 'on the upper surface of the protective layer 5' via an adhesive layer using an adhesive With overlay The layer 128792.doc 12 200905671. In the organic BD_R11, the groove region 7 is spirally formed on the substrate 2, and is formed in the groove 7, and the portion between the groove 7 and the groove 7| 8". The laser light is applied to the light recording layer 3 (viewed as a sequence from the laser light irradiation side) in the groove 7 or on the land 8, and the light recording layer 3 (the groove viewed from the laser light irradiation side) is irradiated with the laser light 9 Make a record. Recording is performed by heating the portion of the optical recording layer 3 that is irradiated with the laser light 9 at a high temperature. Due to this heat generation, the light reflectance changes due to the physical change of the chemical changes in the periphery. The part (4) that changes in the above manner is 成. Then, the shape of the pit is controlled by the illumination control technique of the laser light 9, whereby the necessary signal can be recorded. The above methods are well known and therefore other descriptions are omitted. The method of reproducing the organic BD-R optical disc η recorded along the groove 7 is as follows: irradiating the laser light along the groove 7, and reading the recording signal from the reflected light. The optical information recording medium having the above configuration The principle of following the track by using short-wavelength laser light will be described using FIG. 3 and FIG. 4. FIG. 3(4) is an optical information recording medium=patterned sectional view, and is a view showing the position of the pattern image corresponding to FIG. 3(4). The mode circle of the positional relationship between the spot diameters of the surface of the recording medium on the recording medium. Second:) Figure 4 shows the detector D for detecting the reflected light generated by the illumination of the laser light. Figure 3(4)(4) The position of the push-pull (pp ', h number detected by the detection of the position of the spot light of the laser light of 3 (8) is the schematic diagram of the push-pull (pp ', h number) detected by the first D. The first substrate is formed as a guide groove. An optical recording layer is formed on the upper surface of the side of the sulcus. On the surface of the substrate on which the groove 7 is formed, a land 81 is formed. In the state of closing the tracking, the upper side is I28792.doc •13·200905671 The unrecorded optical recording layer 3 of the optical information recording medium illuminates the short wave Laser light. The detector D of the head is used to detect the reflected light of the short-wavelength laser light that is reciprocally irradiated around the land 8' and the groove 7' by the above-mentioned irradiation, and the photoelectric conversion of the reflected light is performed. And use an oscilloscope to measure push-pull (4)) U. As a result of the above, the push-pull (pp) signal shown in Figure 3 (4) is detected as a voltage. When a waveform such as a sine wave is obtained, short-wavelength laser light can be normally used. Follow the track. That is, in the state of the picture, turn on the ray to make the spot s of the laser light toward the groove 7, (see the shore from the side of the laser light irradiation), and then mark the detector D. The calculated value of the reflected light of the two semicircles A and B becomes, that is, pp = AB = 〇. The above state is explained based on the outline of the amplitude level of Fig. 4, as shown in Fig. 4 (4), when not recorded uF ( Radi.~(4), the value of the shooting amplitude is more than that of the j. The normal pp signal is normalized for circuit processing. The arithmetic expression for normalizing the above PP signal and RF signal is as follows. NPPb Indicates normalized Npp signal when not recorded, Nppa indicates after recording NPP normalization signal.

Pb PP vibrating field vi[V]/RF amplitude when not recorded V2/2[V] NPPa=PP amplitude V1 [V]/RF amplitude after recording V3/2[V] in Figure 4(d) When the PP彳τ value (NPPb) normalized by the regenerative lamp 4 in the unrecorded state is turned off, the NPPb value is increased by the small vibration of the KRF signal. When the optical recording layer 3 is recorded, the reflectance of the re-request signal of the recorded portion when the tracking is turned off in FIG. 4(e) is increased, and the value of the job is less than 128792.doc 14 200905671 NPPb The value 'is therefore impossible to carry out the loop, the hiring is to open the track in the state of Figure 3 (b), so that the light point of the laser light is 8 at #价/上进仃追追, from the detector D The operation of the reflected light of A and 8 for the two semi-circles becomes PP=AB矣0, and it is impossible to send the poor and the poor. Therefore, it is impossible to perform the tracking 0. The inventors found that the short-wavelength laser light having a reproducing power of 〇.25 is subjected to a low-community wave thief of 3 kHz, and the 'PP amplitude% is more than the 〇 '' (7). Therefore, the inventors of the present invention have found that it is appropriate to make the refractive index of the pigment film forming the optical recording layer unrecorded in the range of HU so that the attenuation coefficient k at the time of unrecording is between 〇〇1 and 〇1. The scope of 7. Further, the inventors have found that it is preferable to form an optical recording layer using an organic dye material such that an optical recording layer composed of an organic pigment film has a short-wavelength laser light having a wavelength of 405 nm in an eight-time/counter length The optical density (OD value) (absorbance) is ο" or less. Further, the dye used in the present invention is not particularly limited, and examples thereof include azo and a metal complex thereof, a methine group and a metal complex thereof, a decyl azo group and a metal complex thereof, and the like. Metal complex, cyanine, fluocyanine, squaraine, styryl, coumarin, phthalocyanine, 2, cyanine, indoline, indolyl, oxindole, and tautomers Pigments, etc. For an unrecorded refractive index η and an attenuation coefficient k including the measured values of the following examples, an attempt was made to explore an area where the possibility of being unable to follow the track (which cannot be followed by feeding) was very small. Table 1 shows the results. In the case of No. 1, the first to the eighth is the following [Chemical], and for the "tracking after recording", the above-mentioned tracking can be performed by "〇" 128792.doc 15 200905671 "x" means that you cannot follow the track. Others are as described above. According to the above table, if the value of n+k in the above-mentioned ._ record is less than 2.04 and the pp amplitude* L ”4 _ 〇·2ΐ[ν] is not recorded, the following can be followed, that is, "You make it" ° After the relationship is charted, as shown in Figure 5. According to Table 1 and Figure 5, in order to make "tracking after recording" to "〇, it is possible to perform the tracking after recording, and the ideal value of the amplitude is 0.20 [v. Above, that is, it is preferable to set the range of n + k < 2" of V 〇 [V] $ 〇 . 20 [V]. ° 疋 疋 , , , , , , , , , 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保 确保The range of 01 to 0.7. This can also be used to make 1.21. = 1.2 and the thickness of the optical recording layer composed of the organic pigment film is 55, and according to Fig. 5', it is preferably v〇[v]>〇25[v], n+k<2 〇 or! %. Because it comes from the shore. The light intensity variation and the light intensity distribution are generated in the detector 〇 by the interference of the reflected light of the groove portion and the groove portion. The light intensity variation and the light intensity distribution depend on the optical path difference between the land portion and the groove portion. Therefore, it is necessary to The optical film thickness of the optical recording layer is set to an appropriate range, that is, it is necessary to set it to an appropriate range, and the nd is used for forming the optical recording layer. The refractive index η of the dye which is not recorded and the thickness of the optical recording layer are d. The product of. 128792.doc -16- 200905671 [Table l]

Compound η k n+k PP amplitude m when not recorded. Recording after recording 1.28 0.41 1.69 0.31 〇化2 1.35 0.19 1.54 0.34 〇化3 1.68 0.02 1.70 0.30 〇化4 1.80 0.15 1.95 0.27 〇化5 1.74 0.30 2.04 0.21 〇化6 1.93 0.18 2.11 0.19 X 7 7 1.60 0.63 2.23 0.14 X 8 8 1.95 0.20 2.15 0.18 X

[chemical l]

(A case of Huaqing)

(An example of an azo metal chelate) 128792.doc -17- 200905671 [Chemical 3]

[化4] 〇

(a case of squaric acid) [Chemical 5]

(A case of azo) [Chem. 6] 128792.doc -18- 200905671

BF4- (a case of cyanine) f [化7]

OH

[化8]

128792.doc -19- 200905671 Description of light! The green substrate 2 is formed of a material having a high refractive index for a laser light having a refractive index of, for example, 15 to 1.7, and 1 is mainly formed of a resin excellent in impact resistance. Preferably, for example, a polycarbonate plate is used. , Acrylic acid board, epoxy resin board and other resin boards. Also, a glass plate can be used. Further, the optical recording layer 3 is preferably a layer having a thickness of 15 nm to 12 Q (10) formed of a pigment film containing a pigment material formed on the substrate 2. Then, for example, by changing the molecular structure of the pigment by irradiating the laser light 9, the refractive index n before the irradiation of the laser light 9 is changed according to the variation of the organic dye for the laser light 9 (four) η, the attenuation coefficient k, Δk' The attenuation coefficient 乂 is modulated between the ,, so that the laser can be used for regeneration. This month's light 5 has a recording layer, an organic pigment based on an organic pigment material, and functions as an optical film. The non-recording rate η of the film and the attenuation coefficient at the time of unrecording are mixed with the individual pigments: "", the same as the case where the above-mentioned organic pigment film is formed by using the individual color sensation to form the above organic dye film. The decay coefficient of the optical recording layer may also be used. "The refractive index (4) and unrecorded species 'organic pigment materials and other fondness, the medium to supply, 3 people's heart to add additives to the solution, such as using spin coating to coat thickness hl The ring of mm is formed by the upper surface of the disk-shaped substrate having the spiral yoke to form the optical recording layer 3. Preferably, it is a fluorinated alcohol such as 2,2,3,3-tetrafluoropropanol or propanol, but it can also be used alone or in combination with butyl ketone, di-f-amine, or emulsified ethylene. , porphyrin T, %, ketone, acetamidine, 128792.doc -20- 200905671 diacetone, f-based cellosolve, etc., and, in addition, may be used in combination with a single or a plurality of fluorinated alcohols. The light-reflecting layer 4 is a metal film having a high thermal conductivity and a high light reflectance, and is molded by a method such as a vapor deposition method or a sputtering method, for example, by a metal such as *N, silver, steel, or 4 The metal material such as an alloy is subjected to steaming or plating, etc., and the light-reflecting layer 4 is included. The upper protective layer 5 is formed by a transparent inorganic material to form a film, for example, by sputtering.

A light transmissive resin having a thickness of 〇.lmm is listed. Then, the above-mentioned cover layer 6b is bonded by the subsequent I L ^ layer 6a formed of a transparent adhesive, thereby ensuring that the optical disk reaches a certain thickness. Further, the organic BD is provided with one layer of each of the optical recording layer 3, the light-reflecting layer 4, and the protective layer 5. However, a plurality of layers may be provided to form a so-called multi-layered optical disc, thereby achieving higher density and higher density. Recording is carried out in large capacity. [Embodiment] Next, an embodiment of the present invention will be described with reference to Figs. 2 to 5 . [Example 1] A spiral guide groove having a pitch of 〇 32 " m was formed on a substrate 2 made of a disk-shaped polycarbonate having an outer diameter of 120 mm and a thickness of mm. Accompany

Ik is used to change the software or the like for guiding the tracking, and the guide groove can also use an annular groove. A reflective layer 4 made of an Ag alloy is formed on the upper surface of the substrate 2 on the side of the guide groove formed by a bonding method, and a depth of 45 nm and a width of 160 are formed on the light reflection layer from the substrate side. Ηιη128792.doc 200905671 The track corresponding to the guiding slot. On the upper surface of the substrate 2 on which the light-reflecting layer is formed, the compound of the above-mentioned [cyanine] (cyanine dye) is dissolved to 2, 2, 3, 3 tetrafluoro-1 by spin coating. a pigment solution obtained by using propylene (TFp (tetrafiu〇r〇pr〇pan〇i)), dried at a temperature of 801 for 3 minutes, and then formed a groove 7 having a film thickness (observed from the side of the laser irradiation) The film thickness on the shore is 35 nm, and the film thickness of the land 8' (the film thickness on the groove observed from the laser light irradiation side) is 15 nm light δ recorded layer 3, and the light is made The optical density (〇1) value of the recording layer 3 at the absorption maximum wavelength Qmax) is 〇3. Thereafter, a transparent protective layer 5 made of a ZnS_Si〇2 material having a thickness of 2 Å was sputtered on the upper surface of the optical recording layer 3. Then, a cover layer (light-transmitting layer) 6b made of a polycarbonate thin plate of 0.1 mm was attached to the surface of the protective layer 5 via an adhesive layer made of a transparent adhesive, thereby obtaining an organic BD-R11. A sample of a recordable optical information recording medium. The compound of the above [Chemical Formula 1] was dissolved by spin coating on the upper surface of a flat substrate made of a disk-shaped polycarbonate having a thickness of 120 mm and a thickness of ι·ι mm. The pigment solution obtained in TFP was dried at a temperature of 30 minutes to form a pigment film having a film thickness of 4 〇 nm, and a measuring device of η and k (STEAG ETA 〇ptik A RT/UV manufactured by New York Co., Ltd.) was used. After measuring the refractive index k at the time of unrecording of the optical recording layer 3 in the organic body 1 obtained in the above manner, "1.28, k is 0.41. And the attenuation coefficient at the time of unrecording The main beam regenerative power is 0.25. After reading the short-wavelength laser beam of 3 beams through the 3-pass low-pass filter, the PP amplitude Vi[V] when unrecorded is 0.31 [V]. 128792.doc -22- 200905671 Further, compounds other than the compound of [Chemical Formula 1] (Cyanine Pigment) [Chemical 2], [Chemical 3], [Chemical 4], [Chemical 5], [Chemical 6], [Chemical Formula 7] and [Chemical Formula 8], the same sample was produced, and η and k at the time of unrecording were measured in the same manner using a measuring device (ETA-RT/UV manufactured by STEAg ΕΤΑ_〇ρ^ GmbH). Table 1 shows the measured values. Then, a commercially available recording and reproducing apparatus (DDU-1000 manufactured by Pulstec Co., Ltd.) was used, and the wavelength was 4 under the conditions of a numerical aperture NA of 〇85, a recording power of $ 〇mW, and a linear velocity of 4.92 m/sec.短5 ^^ short-wavelength laser light is used for recording, and the short-wavelength laser light with a wavelength of 4 〇 5 nm is used to evaluate the reproduction characteristics. As a result, tracking can be performed, and the main beam regenerative power is 0.3 mW. After the wavelength laser light passes through a low-pass filter of 3 kHz, the recorded PP amplitude V2 [V] is 〇23 [v], and the modulation is 0.47. Therefore, n and k satisfy the n+k=169 when unrecorded, and the pp amplitude v1[v] when unrecorded is 〇.31[v], satisfying the above-mentioned VQ[v]g〇2〇[v] The relationship of n+k<2.1. The column of Table 5 shows the above results. Examples 2, 3, 4, and 5 The compounds of [Chem. i] in Example 1 were replaced with the compounds of the above [Chemical Formula 2], [Chemical Formula 3], [Chemical Formula 4], and [Chemical Formula 5], respectively. The organic BD-Rli was obtained in the same manner. The results obtained by the measurement in the same manner as in the example 如 can be carried out as described in each of the blocks 2 to 5 in Table 1. η and k respectively satisfy n+k=l 54, 17〇, 1.95, and 2.04 with respect to each unrecorded time, and pp amplitudes v][v] when unrecorded are respectively 〇34[v], 〇_30[V ], 0·27[ν], 〇·21[ν], all satisfy the above-mentioned Vq[v] $128792.doc -23- 200905671, and the modulation degrees are 0.40, 〇41 0.20 [V] n+ The relationship between k < 2, l is 0.43, 0.40. Comparative Examples 1, 2, and 3, the compounds of the servant of [Chemical 1] in Example 1 were replaced with the above-mentioned

In addition to this J, the organic BD-R1 was obtained in the same manner as the compound of [Chem. 7]. The results obtained in the same manner as in the first embodiment are shown in Table 1 in Table 1, and tracking pursuit cannot be performed. Compared with n and k when not recorded, n+k=2 u, m, 2 b, the amplitude Vl[V] is G, 19[V], G.14[V], called V], which cannot satisfy the above. Let V0[V]2 0.20[V]..." and the § week change degrees are 0.44, 0.42, and 0.45, respectively. Further, the constitution and operation of the present invention are not limited by the above descriptions. Various modifications can be made without departing from the spirit and scope of the invention. Fig. 1 is a cross-sectional explanatory view of a conventional HDDVD-R. Fig. 2 is a cross-sectional explanatory view of a recordable optical information recording medium of the present invention. 3(a) to 3(c) are explanatory diagrams for briefly explaining the principle of tracking using short-wavelength laser light. Fig. 4(d) - Fig. 4(e) are the above-mentioned Fig. 3(a)-Fig. Fig. 5 is a graph showing the relationship between n+k and ρρ amplitude when unrecorded. [Main component symbol description] 1 HDDVD-R disc 2 substrate 128792.doc -24 · Optical recording layer (light absorbing layer) Light reflecting layer protective layer or adhesive layer dummy substrate adhesive layer covering layer grooved bank grooved land laser light (recording light, regenerative light) -25-

Claims (1)

200905671 X. Patent application scope: The refractive index body of the optical recording layer is not surface-shaped, and is formed on a surface of the disk-shaped substrate, and the recording layer on the upper surface side of the guiding groove is irradiated with short-wavelength laser light from the optical recording layer. To record the capital of the straw by reading the short-wavelength laser light, the characteristic is: η is in the range of 1.2~2.1, and the attenuation coefficient k is in the range of 〇.〇1~〇.7, And n+k is in the range of 1.4 to 2.1. 2. The recordable optical information recording medium according to claim 1, wherein the optical recording layer laminates the organic pigment material film, and the optical recording layer has an optical density (OD value) of 0.3 or less at the maximum wavelength of absorption. 3. The recordable optical information recording medium of claim 1 or 2, wherein the short-wavelength laser light of the recording and reproducing information has a wavelength of 35 〇 5 〇〇 ηιη. 128792.doc