US 12,005,708 B2
Liquid ejection head and process for producing liquid ejection head
Kazuhiro Asai, Kawasaki (JP); Koji Sasaki, Nagareyama (JP); Jun Yamamuro, Yokohama (JP); and Shingo Nagata, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 22, 2023, as Appl. No. 18/517,965.
Application 18/517,965 is a division of application No. 17/392,419, filed on Aug. 3, 2021.
Application 17/392,419 is a division of application No. 16/536,675, filed on Aug. 9, 2019, granted, now 11,097,540, issued on Aug. 24, 2021.
Claims priority of application No. 2018-166888 (JP), filed on Sep. 6, 2018.
Prior Publication US 2024/0092080 A1, Mar. 21, 2024
Int. Cl. B41J 2/14 (2006.01); B41J 2/16 (2006.01)
CPC B41J 2/14201 (2013.01) [B41J 2/14072 (2013.01); B41J 2/1607 (2013.01); B41J 2/1623 (2013.01); B41J 2002/14491 (2013.01); B41J 2202/19 (2013.01); B41J 2202/20 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A liquid ejection unit comprising:
an ejection port forming member having an ejection port for ejecting liquid;
a substrate having a piezoelectric element for ejecting liquid through the ejection port and an electrical connecting portion electrically coupled to the piezoelectric element and disposed on a surface of the substrate that is opposite to a side where the ejection port forming member is provided; and
an electric wiring member electrically coupled to the electrical connecting portion,
wherein the liquid ejection unit has a polygonal shape with at least five corners as viewed from a side where the ejection port is provided,
wherein the polygonal shape includes:
a first side;
a second side opposite and parallel to the first side;
a third side contiguous with the first side;
a fourth side contiguous with the second side and parallel to the third side;
a fifth side contiguous with the third side; and
a sixth side contiguous with the fourth side and opposite and parallel to the fifth side,
wherein the first side and the second side are offset from each other in a direction A, which is an extending direction of the first side and the second side,
wherein the third side and the fourth side extend in a direction B perpendicular to the direction A, and
wherein the fifth side and the sixth side extend in a direction C intersecting with the direction A and the direction B.