Spin-coating apparatus for preparing optical discs

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(11)

EP 0 920 920 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	27.12.2000 Bulletin 2000/52

(43)	Date of publication A2:
	09.06.1999 Bulletin 1999/23

(21)	Application number: 98309940.9

(22)	Date of filing: 04.12.1998

(51)	International Patent Classification (IPC)⁷: B05C 11/08

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

04.12.1997 JP 35240697

(71)	Applicant: FUJI PHOTO FILM CO., LTD.
	Kanagawa 250-01 (JP)

(72)	Inventors:
	Ishizuka, Seiji Minami-Ashigara-shi, Kanagawa-ken 258 (JP) Katagiri, Yoshinobu Minami-Ashigara-shi, Kanagawa-ken 258 (JP) Sugiyama, Tadashi Minami-Ashigara-shi, Kanagawa-ken 258 (JP)

(74)	Representative: Calamita, Roberto
	Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)

(54)	Spin-coating apparatus for preparing optical discs

(57) A spin-coating apparatus (10) for preparing optical discs (1) is composed of an applying device equipped with a nozzle (12) having a pointed end for giving a coating liquid onto a disc substrate (1), a rotatable spinner head (13) for keeping the substrate (1) horizontally, a round guard wall (15) provided around the spinner head (13) which has an opening (16) on its top and keeps the applied coating liquid within the guard wall (15), and an air exhaust system (18), wherein the nozzle (12) has a surface of polytetrafluoroethylene at least at the pointed end and on an inside and outside walls following the pointed end at a length of 1 mm or more.

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