[54] INK JET RECORDING HEAD AND
APPARATUS HAVING A PROTECTIVE
MEMBER FORMED ABOVE ENERGY
GENERATORS FOR GENERATING ENERGY
USED TO DISCHARGE INK
[75] Inventors: Toshio Suzuki, Inagi; Asao Saito;
Makoto Shibata, both of Yokohama;
Junichi Kobayashi, Ayase; Hirokazu
Komuro; Toshihiro Mori, both of
Yokohama; Shuji Koyama; Sakai
Yokoyama, both of Kawasaki; Ryoichi
Koizumi, Yokohama; Keiichi
Murakami, Hachioji, all of Japan
[73] Assignee: Canon Kabushiki Kaisha, Tokyo,
Japan
[21] Appl. No.: 284,266
[22] Filed: Aug. 2,1994
Related U.S. Application Data
[63] Continuation of Ser. No. 804,594, Dec. 10, 1991, abandoned.
[30] Foreign Application Priority Data
Dec. 12, 1990 [JP] Japan 2-409895
Jan. 18, 1991 [JP] Japan 3-004736
Mar. 4, 1991 [JP] Japan 3-061045
[51] Int. CI.6 B41J 2/34; B41J 2/335;
B41J 2/35
[52] U.S. CI 347/203; 347/20; 347/56;
347/171
[58] Field of Search 347/20, 23, 26,
347/55, 56, 112, 171, 177, 203, 200, 129
[56] References Cited
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4,940,999 7/1990 Bceda et al 346/140 R
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0390198 10/1990 European Pat. Off. .
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OTHER PUBLICATIONS
Jou, J. H., et al., "An Analysis of Thermal Stresses in a Multilayer Thin Film Printhead", Thin Solid Films, Jun. 30, 1991, pp. 253-265.
Primary Examiner—Sandra L. Brase
Attorney, Agent, or Firm—Fitzpatrick, Cella, Harper &
Scinto
[57] ABSTRACT
An ink jet recording head includes energy generators for generating the energy used to discharge ink and a substrate on which a circuit electrically connected to the energy generators is formed. Also provided is a protective member on an insulating layer on the substrate above the energy generators. The area of a protective member which is in contact with the ink is made to be as small as possible.
13 Claims, 21 Drawing Sheets
