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1. (WO2004010424) MULTI-STACK OPTICAL INFORMATION CARRIER COMPRISING THERMOCHROMIC LAYER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2004/010424    International Application No.:    PCT/IB2003/002848
Publication Date: 29.01.2004 International Filing Date: 25.06.2003
IPC:
G11B 7/257 (2006.01)
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1, NL-5621 BA Eindhoven (NL) (For All Designated States Except US).
MEINDERS, Erwin, R. [NL/NL]; (NL) (For US Only)
Inventors: MEINDERS, Erwin, R.; (NL)
Agent: DEGUELLE, Wilhelmus, H., G.; Philips Intellectual Property & Standards, Prof. Holstlaan 6, NL-5656 AA Eindhoven (NL)
Priority Data:
02078016.9 24.07.2002 EP
Title (EN) MULTI-STACK OPTICAL INFORMATION CARRIER COMPRISING THERMOCHROMIC LAYER
(FR) SUPPORT OPTIQUE D'ENREGISTREMENT A PLUSIEURS EMPILEMENTS ET A COUCHE THERMOCHROME
Abstract: front page image
(EN)The present invention relates to a multi-stack optical information carrier for recording information by means of a laser beam, said optical information carrier comprising:- a substrate layer (S),- at least two recording stacks (L1, L2), each comprising a recording layer (P1, P2), at least one heat sink layer (H1-H4) and dielectric layers (I) between said recording layer (P1, P2) and said at least one heat sink layer (H1-H4),- at least one spacer layer (R) separating the at least two recording stacks (L1, L2), and- a cover layer (C). In order to improve the sensitivity during writing, preferably in the first recording stack (L1), it is proposed according to the present invention that at least one recording stack (L1, L2) further comprises at least one thermochromic layer (T1, T2, T3) having temperature-dependent optical characteristics for improving the sensitivity of at least one of said recording stacks (L1) during recording.
(FR)L'invention porte sur un support optique d'enregistrement par faisceau laser à plusieurs empilements comportant: une couche substrat (S); au moins deux empilements (L1, L2) comprenant chacun une couche d'enregistrement (P1, P2) et une couche de dissipation thermique (H1-H4); des couches diélectriques (I) séparant d'une part les couches d'enregistrement (P1, P2) et d'autre part les couches de dissipation thermique (H1-H4); au moins une couche de séparation (R) séparant les empilements (L1, L2), et une couche de protection (C). Afin d'améliorer la sensibilité pendant la gravure, l'invention se propose d'ajouter à au moins l'un des empilements (L1, L2), et de préférence au premier (L1), au moins une couche thermochrome (T1, T2, T3) dont les caractéristiques optiques dépendent de la température, et qui améliore la sensibilité d'un au moins des empilements (L1) pendant la gravure.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)