Ink-jet printhead and manufacturing process
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United States of America Patent
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-
Feb 12, 2002
Grant Date -
N/A
app pub date -
Apr 27, 2000
filing date -
Dec 10, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink-jet printhead and its manufacturing process therefor. The manufacturing process comprises the steps of: providing a substrate; forming a loop-shaped protection layer of a predetermined size over the central region of the substrate, the loop-shaped protection layer defining a predetermined area surrounded thereby; and forming an ink passage by sand blasting through the substrate on the predetermined area so that the ink within the ink cartridge can flow into the ink-jet printhead through the ink passage. Therefore, during the sand blasting process, cracking of the IC chip can be avoided because of the protection by the loop-shaped protection layer.
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