Ink jet recording head having reserve functional devices
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United States of America Patent
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-
Mar 10, 1998
Issued Date -
N/A
app pub date -
Mar 18, 1997
filing date -
Jan 25, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink jet recording apparatus comprises a liquid ejection portion having an ejection outlet for ejecting ink; and a recording head having a substrate on which are provided an electrothermal transducer for generating heat for the ejection of ink supplied to the ejection portion, at least one functional device electrically connected to the electrothermal transducer, and a laminate. The structure of at least a part of the laminate is identical with the structure of the functional devices and the laminate is useable as a reserve functional device. Such construction of the recording head makes it possible to change the function thereof easily, and, can be copied flexibly with change of design. A portion of the functional device can be formed in a U shape.
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