Recording head and recording apparatus using the same
AssigneeCanon Kabushiki Kaisha
InventorYasutomo Watanabe
Life of this patent
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Abstract
An ink jet head includes bump-shaped electrodes and of a recording element board and a drive element board, respectively. Of both electrodes, Young's modulus of a material forming the electrode is made smaller than Young's modulus forming the other bump-shaped electrode. With this construction, when the electrode and the electrode are press bonded to each other, since the electrode is relatively smaller in rigidity to the deformation, it deforms for itself thereby minimizing deformation in the electrode. As a result, when a new board is mounted, even if the electrode has an error, good bonding can be carried out.
Claims13
A recording head, comprising:
- a recording element unit comprising;
- a plurality of recording elements;
- and
- at least a first bump-shaped electrode for electrical connection;
- and
- a drive element unit comprising:
- a plurality of drive elements for driving said recording elements of said recording element unit;
- and
- at least a second bump-shaped electrode for electrical connection,
- wherein said recording element unit and said drive element unit are electrically connected by mutual bonding of said first and said second bump-shaped electrodes, and a Young's modulus of a material forming one said bump-shaped electrode of said two units is smaller than a Young's modulus of a material forming the other said bump-shaped electrode of said two units.
A recording head, comprising:
- a recording element unit comprising:
- a plurality of recording elements;
- and
- at least a first bump-shaped electrode for electrical connection;
- and
- a drive element unit comprising;
- a plurality of drive elements for driving said recording elements of said recording element unit;
- and
- at least a second bump-shaped electrode for electrical connection,
- wherein said recording element unit and said drive element unit are electrically connected by mutual bonding of said first and said second bump-shaped electrodes, and one said bump-shaped electrode of said two units has a shape which decreases in sectional area along a bonding direction.
A recording apparatus for recording on a recording medium using a recording head having a recording element unit provided with a plurality of recording elements and at least a first bump-shaped electrode for electrical connection, and a drive element unit provided with a plurality of drive elements for driving said recording elements of said recording element unit and at least a second bump-shaped electrode for electrical connection, said recording element unit and said drive element unit are electrically connected by mutual bonding of said first and said second bump-shaped electrodes, and a Young's modulus of a material forming one said bump-shaped electrode of said two units is smaller than a Young's modulus of a material forming the other said bump-shaped electrode of said two units, comprising;
- a support which holds said recording head such that an ejection port surface of said recording head opposes a surface of said recording medium with a predetermined spacing.
A recording apparatus for recording on a recording medium using a recording head having a recording element unit provided with a plurality of recording elements and at least a first bump-shaped electrode for electrical connection, and a drive element unit provided with a plurality of drive elements for driving said recording elements of said recording element unit and at least a second bump-shaped electrode for electrical connection, said recording element unit and said drive element unit are electrically connected by mutual bonding of said first and said second bump-shaped electrode, and one said bump-shaped electrode of said two units has a shape which decreases in sectional area along a bonding directions comprising;
- a support which holds said recording head such that an ejection port surface of said recording head opposes a surface of said recording medium with a predetermined spacing.
Dependencies are inferred from the claim text.