KR20030038755A - Optical Data Carrier Containing A Phthalocyanine Colouring Agent As A Light Absorbing Compound In The Information Layer - Google Patents

Abstract

The present invention relates to an optical data carrier, preferably containing a transparent substrate, optionally coated with one or more reflective layers. An optically recordable information layer and optionally one or more reflective layers and optionally a protective layer and an additional substrate or coating layer are applied on the substrate surface. The optical data carrier can be recorded and read using blue light, preferably laser light. The information layer contains a light absorbing compound and optionally a binder. The optical data carrier of the present invention is characterized in that at least one phthalocyanine colorant is used as the light absorbing compound.

Description

Optical Data Carrier Containing A Phthalocyanine Coloring Agent As A Light Absorbing Compound In The Information Layer

Single recordable optical media using special light absorbing materials or mixtures thereof include high density recording optical data media and / or red (635-660 nm) operating with blue laser diodes, in particular GaN or SHG laser diodes (360-460 nm). Or in the case of DVD-R or CD-R discs operating with infrared (780-830 nm) laser diodes and with polymer bases of the aforementioned dyes by spin-coating, vapor deposition or spurt deposition, in particular with polycarbonate It is especially suitable for the application of.

Compact recordable compact discs (CD-R, 780nm) have recently experienced rapid quantitative growth and are a technically established system.

Recently, a next generation optical data storage device (DVD) has been released to the market. The memory density can be increased using shortwave laser radiation (635-660 nm) and high cook count (NA). In this case, the recordable format alone is DVD-R.

Optical data storage format using a blue laser diode with a high laser power (GaN substrate, JP-A-08 191 171 or S econd H armonic G eneration SHG JP -A-09 050 629) (360 nm to 460nm), the current In development. Accordingly, recordable optical data storage devices are also in use today. The recordable storage density depends on focusing the laser spot on the information plate. The size of the spot is measured by the laser wavelength λ / NA. NA is the number of dishes of the lens used. In order to obtain the highest possible storage density, the use of the shortest possible wavelength [lambda] is preferred. Currently, 390 nm is possible on a semiconductor laser diode basis.

Patent documents JP-A 11 043 481 and JP-A 10 181 206 describe recordable optical data storage devices suitable for dye-based CD-R and DVD-R systems. Here, for high reflectance and high modulation amplitude of the read signal, and sufficient sensitivity at the time of recording, the IR wavelength of CD-R located at the bottom of the long wave side of the absorption peak of the dye and the bottom of the short wave side of the absorption peak of the dye are located. It is natural to use the red wavelength 635 nm or 650 nm of DVD-R (cf. EP-A 519 395 and WO-A 00/09522). This concept extends from JP-A 02 557 335, JP-A 10 058 828, JP-A 06 336 086, JP-A 02 865 955, WO-A 09 917 284 and US-A 5 266 699, with absorption peaks It includes the 450nm operating wavelength region on the short wave side of and the red and IR region on the long wave side.

In addition to the optical properties mentioned above, the recordable information layer comprising the light absorbing organic material should have the amorphous shape possible in order to minimize noise signals during recording and reading. For this purpose, when applying the material by spin-coating, spurt deposition or vapor deposition and / or sublimation from the solution, it is particularly preferable to prevent crystallization of the light absorbing material in subsequent coatings with metallic or dielectric layers in vacuum. .

The amorphous layer of light absorbing material should preferably have high thermal warping resistance, otherwise an additional layer of organic or inorganic material applied to the light absorbing information layer by sputter deposition or vapor deposition will form an unclear interface through diffusion. This will adversely affect the reflectance. In addition, light absorbing materials having too low heat distortion resistance at the interface with the polymer substrate may diffuse into the polymer substrate, and once again may adversely affect the reflectance.

If the light absorbing material has an excessively high vapor pressure, the material may be sublimed during sputter deposition or deposition of the additional layer at the high vacuum mentioned above, thereby reducing the desired layer thickness. This also has an adverse effect on the reflectance.

The present invention relates to a singly recordable optical data medium comprising at least one phthalocyanine dye as a light absorbing compound in an information layer and a method for producing the same.

Accordingly, it is an object of the present invention to provide a high level of requirements for use in an information layer in an optical data medium that can be recorded alone, in particular in an optical data storage format capable of recording at high density in the laser wavelength range of 360 to 460 nm (e.g. To provide a suitable compound that satisfies light stability, advantageous signal and / or noise ratio, undamaged application to the base material, and the like.

Surprisingly, it has been found that a light absorbing compound selected from the group consisting of phthalocyanines can particularly satisfy the above mentioned condition profile. Phthalocyanine has strong absorption, ie B or Soret band, in the wavelength range of 360-460 nm which is important in lasers.

Thus, the present invention is preferably coated in advance with at least one reflective layer, on the surface of which is an information layer recordable using light, optionally with at least one reflective layer and optionally a protective or additional substrate or coating layer. Contains a transparent substrate and can be recorded and read using blue light, preferably laser light, particularly preferably 360-460 nm, especially 380-420 nm, very particularly preferably 390-410 nm, the information layer being light It relates to an optical data medium containing an absorbing compound and optionally a binder, characterized in that at least one phthalocyanine is used as the light absorbing compound.

In a preferred embodiment, the phthalocyanine used is a compound of formula (I)

[In the formula,

Pc is phthalocyanine,

M is a trivalent metal atom of formula (Ia) in which two independent H atoms, a divalent metal atom or a side chain is matched, or a tetravalent metal atom of formula (Ib) in which a side chain is disubstituted, or a side chain is A trivalent metal atom of formula (Ic), which is matched and the side chain is monocoordinated,

(Where, for charged ligand X ₂ or X ₁ , the charge is the opposite ion, for example anion An Or cationic Kat Offset by

The radicals R ³ to R ⁶ correspond to substituents on the phthalocyanine ring,

X ¹ and X ² are each independently halogen, hydroxyl, oxygen, cyano, thiocyanato, cyanato, alkenyl, alkynyl, arylthio, dialkylamino, such as F, Cl, Br, I , Alkyl, alkoxy, acyloxy, alkylthio, aryl, aryloxy, -O-SO ₂ R ⁸ , -O-PR ¹⁰ R ¹¹ , -OP (O) R ¹² R ¹³ , -O-SiR ¹⁴ R ¹⁵ R ¹⁶ , a radical of NH ₂ , alkylamino and heterocyclyl amine,

R ³ , R ⁴ , R ⁵ and R ⁶ are each independently halogen, such as F, Cl, Br, I, cyano, nitro, alkyl, aryl, alkylamino, dialkylamino, alkoxy, alkylthio, aryloxy , Arylthio, SO ₃ H, SO ₂ NR ¹ R ² , CO ₂ R ⁹ , CONR ¹ R ² , NH-COR ⁷ or a radical of the formula-(B) _m -D-,

Wherein B is a bridge element selected from the group consisting of a direct bond, CH ₂ , CO, CH (alkyl), C (alkyl) ₂ , NH, S, O or —CH═CH—, and (B) _m is a bridge element A chemically reasonable sequence of B, wherein m is 1 to 10, preferably m is 1, 2, 3 or 4,

D is a redox system of a monovalent radical of the formula

[Formula]

or,

Metalloceneyl radicals or metallocenylcarbonyl radicals suitable for the metal center, titanium, manganese, iron, ruthenium, or osmium,

Z ¹ and Z ² are each independently NR'R ", OR" or SR ",

Y ¹ is NR ', O or S, Y ² is NR',

n is 1 to 10,

R 'and R "are each independently hydrogen, alkyl, cycloalkyl, aryl or heteroaryl, or or Form a direct bond or bridge to one of the C atoms of the chain,

w, x, y and z are each independently 0 to 4, w + x + y + z ≦ 16,

R ¹ and R ² are each independently hydrogen, alkyl, hydroxyalkyl or aryl, or R ¹ and R ² together with the N atom to which they are attached are heterocyclic 5-, 6- or 7-membered rings (optionally Further hetero atoms, especially with groups selected from the group consisting of O, N and S), NR ¹ R ² is especially pyrrolidino, piperidino or morpholino,

R ⁷ to R ¹⁶ are each independently alkyl, aryl, heteroaryl or hydrogen, especially alkyl, aryl or heteroaryl,

An ^- is an anion, especially halide, C ₁ - to C ₂₀ - alkyl COO-, formate, oxalate, lactate, glycolate, ^{_{citrate, CH 3 OSO 3 -, NH}} 2 SO 3 -, CH 3 SO ₃ ^-, 1/2 SO ₄ ^2- or PO ₄ ^3- being 1/3;

Wherein M is a radical of formula (Ic), in particular Co (III), is a metal atom, and preferred heterocyclic amine ligands or substituents in X ¹ and X ² are morpholine, piperidine, piperazine, pyridine, 2 , 2-bipyridine, 4,4-bipyridine, pyridazine, pyrimidine, pyrazine, imidazole, benzimidazole, isoxazole, benzisoxazole, oxazole, benzoxazole, thiazole, benzothiazole, quinoline , Pyrrole, indole and 3,3-dimethylindole, each being coordinated or substituted at the nitrogen atom with a metal atom.

Alkyl, alkoxy, aryl and heterocyclic radicals optionally contain additional radicals such as alkyl, halogen, hydroxyl, hydroxylalkyl, amino, alkylamino, dialkylamino, nitro, cyano, CO-NH ₂ , Alkoxy, alkoxycarbonyl, morpholino, piperidino, pyrrolidino, pyrrolidono, trialkylsilyl, trialkylsiloxy or phenyl. Alkyl and alkoxy radicals may be saturated, unsaturated, straight or branched chains, alkyl radicals may be partially halogenated or overhalogenated, and alkyl and alkoxy radicals may be ethoxylated, propoxylated or silylated. Adjacent alkyl and / or alkoxy radicals on the aryl or heterocyclic radicals together form a three or four membered bridge.

Preferred compounds of formula (I) are those in which the following definitions apply to the radicals R ¹ to R ¹⁶ , R ′ and R ″ and ligands or substituents of X ¹ and X ² :

"Alkyl" substituents are preferably C ₁ -C ₁₆ -alkyl, in particular C ₁ -C ₆ -alkyl, which optionally is halogen, such as chlorine, bromine or fluorine, hydroxyl, cyano and / or C ₁ -C Substituted by ₆ -alkoxy;

"Alkoxy" substituents are preferably C ₁ -C ₁₆ -alkoxy, in particular C ₁ -C ₆ -alkoxy, which is optionally halogen, hydroxyl, cyano and / or C ₁ -C such as chlorine, bromine or fluorine Substituted by ₆ -alkyl;

"Cycloalkyl" substituents are preferably C ₄ -C ₈ -cycloalkyl, in particular C ₅ -to C ₆ -cycloalkyl, which is optionally halogen, hydroxyl, cyano and / or such as chlorine, bromine or fluorine Substituted by C ₁ -C ₆ -alkyl,

"Alkenyl" substituents are preferably C ₆ -C ₈ -alkenyl, which is optionally halogen, such as chlorine, bromine or fluorine, hydroxyl, cyano and / or C ₁ -C ₆ -alkyl, alkenyl ( Especially allyl)

"Heteroaryl" substituents are heterocyclic radicals of 5 to 7 membered rings, preferably containing heteroatoms preferably selected from the group consisting of N, S and (or) O, optionally fused with an aromatic ring or optionally further substituents Containing, for example, halogen, hydroxyl, cyano and / or alkyl, in particular pyridyl, furyl, thienyl, oxazolyl, thiazolyl, imidazolyl, quinolyl, benzoxazolyl, benzothiazolyl And benzimidazolyl.

"Aryl" substituents are preferably C ₆ -C ₁₀ -aryl, especially phenyl or naphthyl, which optionally is halogen, such as F or Cl, hydroxyl, C ₁ -C ₆ -alkyl, C ₁ -C _6- Substituted by alkoxy, NO ₂ and / or CN.

R ³ , R ⁴ , R ⁵ and R ⁶ are each independently, preferably chlorine, fluorine, bromine, iodine, cyano, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, tert-amyl, hydroxyethyl, 3-dimethylaminopropyl, 3-diethylaminopropyl, phenyl, p-tert-butylphenyl, p-methoxyphenyl, isopropylphenyl, trifluoromethylphenyl, naphthyl, methylamino , Ethylamino, propylamino, isopropylamino, butylamino, isobutylamino, tert-butylamino, pentylamino, tert-amylamino, benzylamino, methylphenylhexylamino, hydroxyethylamino, aminopropylamino, aminoethylamino , 3-dimethylaminopropylamino, 3-diethylaminopropylamino, diethylaminoethylamino, dibutylaminopropylamino, morpholinopropylamino, piperidinopropylamino, pyrrolidinopropylamino, pyrrolidinov Lofilamino, 3- (methylhydroxyethylamino) propylamino, methoxyethylamino, ethoxyethylamino, methoxypropylamino, ethoxypropylamino, methoxyethoxypropylamino, 3- (2-ethylhexyloxy Propylamino, isopropyloxypropylamino, dimethylamino, diethylamino, diethanolamino, dipropylamino, diisopropylamino, dibutylamino, diisobutylamino, di-tertbutylamino, dipentylamino, di-tert-amylamino, bis (2-ethylhexyl) amino, bis (aminopropyl) amino, bis (aminoethyl) amino, bis (3-dimethylaminopropyl) amino, bis (3-diethylaminopropyl) amino , Bis (diethylaminoethyl) amino, bis (dibutylaminopropyl) amino, di (morpholinopropyl) amino, di (piperidinopropyl) amino, di (pyrrolidinopropyl) amino, di (pyrroli Dinopropyl) amino, bis (3-meth -Hydroxyethylamino) propyl) amino, dimethoxyethylamino, diethoxyethylamino, dimethoxypropylamino, diethoxypropylamino, di (methoxyethoxyethyl) amino, di (methoxyethoxypropyl) amino, Bis (3- (2-ethylhexyloxy) propyl) amino, di (isopropyloxyisopropyl) amino, methoxy, ethoxy, propyloxy, isopropyloxy, butyloxy, isobutyloxy, tert-butyloxy Pentyloxy, tert-amyloxy, methoxyethoxy, ethoxyethoxy, methoxypropyloxy, ethoxypropyloxy, methoxyethoxypropyloxy, 3- (2-ethoxyhexyloxy) propyloxy, Methylthio, ethylthio, propylthio, isopropylthio, butylthio, isobutylthio, tert-butylthio, pentylthio, tert-amylthio, phenyl, methoxyphenyl, trifluoromethylphenyl, naphthyl, CO ₂ R ⁷ , CONR ¹ R ² , NH-COR ⁷ , SO ₃ H, SO ₂ NR ¹ R ² , or preferably Is a radical of the formula,

Where (B) _m is

Where asterisk (*) represents a connection to a 5-membered ring)

M ₁ is Mn or Fe cation,

w, x, y and z are each independently 0 to 4, w + x + y + z ≦ 12,

NR ¹ R ² is preferably amino, methylamino, ethylamino, propylamino, isopropylamino, butylamino, isobutylamino, tert-butylamino, pentylamino, tert-amylamino, benzylamino, methylphenylhexylamino, 2-ethyl-1-hexylamino, hydroxyethylamino, aminopropylamino, aminoethylamino, 3-dimethylaminopropylamino, 3-diethylaminopropylamino, morpholinopropylamino, piperidinopropylamino, blood Lolidinopropylamino, pyrrolidinopropylamino, 3- (methyl-hydroxyethylamino) propylamino, methoxyethylamino, ethoxyethylamino, methoxypropylamino, ethoxypropylamino, methoxyethoxypropylamino , 3- (2-ethylhexyloxy) propylamino, isopropyloxyisopropylamino, dimethylamino, diethylamino, dipropylamino, diisopropylamino, dibutyl Amino, diisobutylamino, di-tert-butylamino, dipentylamino, di-tert-amylamino, bis (2-ethylhexyl) amino, dihydroxyethylamino, bis (aminopropyl) amino, bis (amino Ethyl) amino, bis (3-dimethylaminopropyl) amino, bis (3-diethylaminopropyl) amino, di (morpholinopropyl) amino, di (piperidinopropyl) amino, di (pyrrolidinopropyl) Amino, di (pyrrolidinopropyl) amino, bis (3- (methyl-hydroxyethylamino) propyl) amino, dimethoxyethylamino, diethoxyethylamino, dimethoxypropylamino, diethoxypropylamino, di (meth Methoxyethoxypropyl) amino, bis (3- (2-ethylhexyloxy) propyl) amino, di (isopropyloxyisopropyl) amino, anilino, p-toludino, p-tert-butylanilino, p-anisidino, isopropylanilino or naphthylamino, or NR ¹ R ² is wind Preferably pyrrolidino, piperidino, piperazino or morpholino.

R ⁷ to R ¹⁶ are each independently hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, tert-amyl, phenyl, p-tert-butylphenyl, p-methoxyphenyl, Isopropylphenyl, p-trifluoromethylphenyl, cyanophenyl, naphthyl, 4-pyridyl, 2-pyridyl, 2-quinolinyl, 2-pyrrolyl or 2-indolyl.

Alkyl, alkoxy and heterocyclic radicals optionally include additional radicals such as alkyl, halogen, hydroxyl, hydroxyalkyl, amino, alkylamino, dialkylamino, nitro, cyano, CO-NH ₂ , alkoxy, Alkoxycarbonyl, morpholino, piperidino, pyrrolidino, pyrrolidino, trialkylsilyl, trialkylsilyloxy or phenyl, wherein the alkyl and / or alkoxy radicals are saturated, unsaturated, straight chain or Branched, alkyl radicals may be partially halogenated or overhalogenated, alkyl and / or alkoxy radicals may be ethoxylated, propoxylated or silylated, adjacent alkyl on an aryl or heterocyclic radical and (Or) Alkoxy radicals may together form a three or four membered bridge.

Within this specification, redox systems are described in Angew. Chem. 1978, page 927, and Topics of Current Chemistry, Vol. 92, page 1 (1980)] and the same meaning as the specific redox system described.

P-phenylenediamine, phenothiazine, dihydrophenazine, bipyridinium salt (viologen) and quinodimethane are preferred.

In a preferred embodiment,

M is two independent H atoms or from the group consisting of Cu, Ni, Zn, Pd, Pt, Fe, Mn, Mg, Co, Ru, Ti, Be, Ca, Ba, Cd, Hg, Pb and Sn Selected tooth is a metal atom Me, or

M is a trivalent metal atom monovalently substituted with a side chain of formula (Ia), wherein metal Me is selected from the group consisting of Al, Ga, Ti, In, Fe and Mn; or

M is a phthalocyanine of formula (I) wherein the side chain of formula (Ib) is a divalent tetravalent metal atom, wherein the metal Me is selected from the group consisting of Si, Ge, Sn, Zr, Cr, Ti, Co and V This is used.

X ¹ and X ² are particularly preferably halogen, in particular chlorine, aryloxy, in particular phenoxy, or alkoxy, in particular methoxy.

R ³ -R ⁶ is especially halogen, C ₁ -C ₆ -alkyl or C ₁ -C ₈ -alkoxy.

Particular preference is given to phthalocyanines of formula (I) wherein M is a radical of formula (Ia) or (Ib), w, x, y and z are each 0 and X ¹ and / or X ² are each halogen.

Phthalocyanines used according to the invention are known methods, for example,

-Synthesis of nuclei from correspondingly substituted phthalodinitriles in the presence of the corresponding metal, metal halide or metal oxide,

Chemical modification of phthalocyanines, for example chlorination or chlorination of phthalocyanines and further reactions, eg condensation or substitution of products resulting therefrom,

-By side chain substitution of X ¹ and X ² which are generally prepared from the corresponding halides by exchange.

The heat absorbing compound may preferably be thermally modified. Thermal modification is preferably carried out at <600 ° C. Such modification can be, for example, decomposition or chemical modification of the color development center of the light absorbing compound.

The light-absorbing materials described describe the thermal degradation of the information layer during illumination at points where a sufficiently high reflectance of the optical data medium and concentrated blue light, in particular laser light, preferably in the range of 360 to 460 nm, are used without recording. Ensure a sufficiently high absorption. The contrast between the recorded and non-recorded portions on the data carrier is understood through the change in reflectance in terms of amplitude and phase of incident light as a result of the changed optical properties of the information layer after thermal decomposition.

In other words, preferably the optical data carrier can be recorded and read using laser light having a wavelength of 360-460 nm,

Coating with phthalocyanine is preferably accomplished by spin-coating, spurt deposition or deposition. By vacuum deposition or spur deposition, phthalocyanines, in particular in whey, aqueous or aqueous media, preferably w, x, y and z are each 0 and M is or It is possible to apply compounds of formula (I) wherein X ₁ and X ₂ are each of the meanings mentioned above.

In particular, phthalocyanines that are soluble in oily or aqueous media are suitable for application by spin-coating. Phthalocyanines can each be mixed with each other or with other dyes having similar spectral properties. The information layer may contain, in addition to phthalocyanines, additives such as binders, wetting agents, stabilizers, diluents and photosensitizers and additional components.

Optical data storage may include additional layers in addition to the information layer, for example a metal layer, a dielectric layer and a protective layer. Metal and dielectric layers serve to adjust reflectivity and thermal balance, among others. The metal may be gold, silver, aluminum, alloy, etc., depending on the layer wavelength. The dielectric layer is, for example, silica and silicon nitride. Protective layers are, for example, photocurable coatings, adhesive layers and protective films.

Alternatively, the structure of the optical data medium may be as follows;

It contains at least one information layer, optionally a reflective layer and optionally an adhesive layer, and further preferably a transparent substrate, preferably transparent substrate, which is recordable using light on its surface.

It contains a reflective substrate, preferably a transparent substrate, coated with a reflective layer, at least one information layer recordable using light, optionally an adhesive layer and a transparent coating layer.

The invention furthermore relates to an optical data medium recordable using blue light, in particular laser light, particularly preferably 360-460 nm laser light, according to the invention.

The following examples illustrate the invention.

Example 1

High vacuum (pressure p) from molybdenum boats resistively heated at a rate of about 5 μs / s on a polycarbonate substrate pre-groove with dye monoclo-aluminum-phthalocyanine (AlClPc) 2 · 10 ⁻⁵ mbar) by vapor deposition. The layer thickness was about 70 nm. Pre-slotted polycarbonate substrates were produced into discs by injection molding. The diameter of the disk was 120 mm and its thickness was 0.6 mm. The track spacing of the grooved structure applied in the injection molding method was about 1 μm, and the groove depth and the width 1/2 of the groove were about 150 nm and about 260 nm, respectively. The disc using the dye layer as the information carrier was coated by vapor deposition using 100 nm Ag. The UV-curable acrylic acid coating was then applied by spin-coating and cured using a UV lamp. Mounted on an optical bench consisting of a GaN diode laser (λ = 405 nm), a polarization photosensitive beam splitter, a λ / 4 plate and a moveable focusing lens with a NA = 0.65 (working lens) to produce linearly polarized laser light. The test was performed using a dynamic recording test instrument. The light reflected by the disk was connected off the beam path using the above-mentioned polarized photosensitive beam splitter and focused on the quadrant detector by the astigmatism lens. Linear velocity V = 5.24 m / s, recording power P _w = 13 mV, signal / noise ratio S / N = 25 dB were measured. The write power is applied in a pulse sequence, the disk is alternately irradiated with the above-mentioned write power P _w for 1 ms, and for 4 ms with read power P _r = 0.44 mW. Examine the disc with this pulse sequence until the end of one rotation. Thus, after the indication was generated, the reading power P _r = 0.44 mW was read and the above mentioned signal / noise ratio S / N was measured.

Example 2

A 45 nm thick layer of dye dichloro-silicone-phthalocyanine was applied by vapor deposition to a disk having the same thickness and groove structure as in Example 1. Using the same optics and the same recording method (write power P _w = 13 mV, read power P _r = 0.44 mW), signal / noise ratio S / N = 46 dB was measured at linear velocity V = 4.19 m / s. .

In addition, the phthalocyanine of the following examples was used similarly to the methods of Examples 1 and 2, and showed comparable properties.

Example 3

In each case, a dye phenoxy-aluminum-phthalocyanine with a thickness of 70 nm was applied by vapor deposition to a disc having the same thickness and groove structure as in Example 1. Using the same optics and the same recording method (write power P _w = 13 mV, read power P _r = 0.44 mW), signal / noise ratio S / N = 22 dB was measured at linear velocity V = 5.24 m / s. .

Example 4

In each case, a dye phenoxy-aluminum-phthalocyanine having a thickness of 70 nm was applied by vapor deposition to a disc having the same thickness and groove structure as in Example 1. Using the same optics and the same recording method (write power P _w = 13 mV, read power P _r = 0.44 mW), signal / noise ratio S / N = 23 dB was measured at linear velocity V = 5.24 m / s. .

Example 5

Claims (7)

An information layer, optionally coated with at least one reflective layer previously, having a recordable information using light on its surface, optionally coated with at least one reflective layer and optionally a protective or additional substrate or coating layer, preferably a transparent substrate Optical data carrier, characterized in that it can be recorded and read using blue light, preferably laser light, the information layer contains a light absorbing compound and optionally a binder, and at least one phthalocyanine is used as the light absorbing compound . The optical data medium of claim 1 wherein the phthalocyanine dye is a compound of formula (I) [Formula I] [In the formula, Pc is phthalocyanine, M is a trivalent metal atom of formula (Ia) in which two independent H atoms, a divalent metal atom or a side chain is matched, or a tetravalent metal atom of formula (Ib) in which a side chain is disubstituted, or a side chain is A trivalent metal atom of formula (Ic), which is matched and the side chain is monocoordinated, Formula Ia Formula Ib Formula Ic (Where, for a charged ligand or substituent X ₂ or X ₁ , the charge is offset by the counter ion) The radicals R ³ to R ⁶ correspond to substituents on phthalocyanine, X ¹ and X ² are each independently halogen, hydroxyl, oxygen, cyano, thiocyanate, cyanato, alkenyl, alkynyl, arylthio, dialkylamino, alkyl, alkoxy, acyloxy, alkylthio, Aryl, aryloxy, -O-SO ₂ R ⁸ , -O-PR ¹⁰ R ¹¹ , -OP (O) R ¹² R ¹³ , -O-SiR ¹⁴ R ¹⁵ R ¹⁶ , NH ₂ , alkylamino and heterocyclyl Radicals of amines, R ³ , R ⁴ , R ⁵ and R ⁶ are each independently halogen, cyano, nitro, alkyl, aryl, alkylamino, dialkylamino, alkoxy, alkylthio, aryloxy, arylthio, SO ₃ H, SO ₂ NR ¹ R ² , CO ₂ R ⁹ , CONR ¹ R ² , NH-COR ⁷ or a radical of the formula-(B) _m -D-, Wherein B is a bridge element selected from the group consisting of a direct bond, CH ₂ , CO, CH (alkyl), C (alkyl) ₂ , NH, S, O or —CH═CH—, and (B) _m is a bridge element A chemically reasonable sequence of B, wherein m is 1 to 10, preferably m is 1, 2, 3 or 4, D is a redox system of a monovalent radical of the formula [Formula] or, Metalloceneyl radicals or metallocenylcarbonyl radicals suitable for the metal center, titanium, manganese, iron, ruthenium, or osmium, Z ¹ and Z ² are each independently NR'R ", OR" or SR ", Y ¹ is NR ', O or S, Y ² is NR', n is 1 to 10, R 'and R "are each independently hydrogen, alkyl, cycloalkyl, aryl or heteroaryl, or or Form a direct bond or bridge to one of the C atoms of the chain, w, x, y and z are each independently 0 to 4, w + x + y + z ≦ 16, R ¹ and R ² are each independently alkyl, hydroxyalkyl or aryl, or R ¹ and R ² together with the N atom to which they are attached are heterocyclic 5-, 6- or 7-membered rings (optionally additional hetero Atoms, in particular with groups selected from the group consisting of O, N and S), NR ¹ R ² is in particular pyrrolidino, piperidino or morpholino, R ⁷ to R ¹⁶ are each independently alkyl, aryl, heteroaryl, or hydrogen; The compound of claim 2, wherein M is two independent H atoms, or Cu, Ni, Zn, Pd, Pt, Fe, Mn, Mg, Co, Ru, Ti, Be, Ca, Ba, Cd, Hg, Pb And a divalent metal atom Me selected from the group consisting of Sn, or a trivalent metal atom whose side chain of formula (Ia) in which Me is Al, Ga, Ti, In, Fe or Mn is matched, or Me is Si, Ge , A Sn, Zr, Cr, Ti, Co or V tetravalent metal atom of formula (Ib). The method of claim 2, M is a radical of formula (Ia) or (Ib) wherein Me is Al or Si, X ₁ and X ₂ are halogen, in particular chlorine, aryloxy, in particular phenoxy, or alkoxy, in particular methoxy, optical data medium in which w, x, y and z are each zero. Preferably a transparent substrate, optionally coated with a reflective layer, is optionally coated with a phthalocyanine dye, optionally with suitable binders and additives, and optionally with a suitable solvent, optionally with a reflective layer, further intermediate and optionally protective or further substrates or coating layers. A method for producing an optical data carrier according to claim 1. The method of claim 5, wherein the coating with phthalocyanine dye is achieved by spin-coating, spurt deposition or deposition. An optical data carrier having a recordable information layer obtainable by recording on an optical data carrier according to claim 1 using blue light, preferably laser light, in particular laser light having a wavelength of 360-460 nm.