Recording apparatus with a recording head having a wiring substrate

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(11)

EP 0 451 939 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	11.12.1991 Bulletin 1991/50

(43)	Date of publication A2:
	16.10.1991 Bulletin 1991/42

(21)	Application number: 91301490.8

(22)	Date of filing: 25.02.1991

(51)	International Patent Classification (IPC)⁵: B41J 2/16

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB GR IT LI LU NL SE

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Priority:

26.02.1990 JP 42533/90
28.02.1990 JP 49873/90

(71)	Applicant: CANON KABUSHIKI KAISHA
	Tokyo (JP)

(72)	Inventors:
	Watanabe, Yasutomo, Canon Kabushiki Kaisha Ohta-ku, Tokyo (JP) Tamura, Hideo, Canon Kabushiki Kaisha Ohta-ku, Tokyo (JP)

(74)	Representative: Beresford, Keith Denis Lewis et al
	BERESFORD & Co. 2-5 Warwick Court High Holborn London WC1R 5DJ London WC1R 5DJ (GB)

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References cited: :

(54)	Recording apparatus with a recording head having a wiring substrate

(57) In the wiring portion in the wiring substrate constituting the recording head of a liquid spray type recording apparatus, the electroconductive layers (30, 141) comprises at least two layers, the protective layer of the electroconductive layer includes at least two unit layers (35, 36, 142, 144), one of them being formed so that it has a shape and size different has a size and shape different from those of the through hole(s) (35a, 36a) in remaining unit protective layer(s) (35, 36, 142, 144), thereby assuring the formation of electric connection portion and improving durability of the electric connection portion.

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