US 12,246,535 B2
Liquid ejection head and production method for producing same
Mitsuru Chida, Kanagawa (JP); and Junichiro Iri, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Oct. 7, 2022, as Appl. No. 17/961,839.
Claims priority of application No. 2021-168778 (JP), filed on Oct. 14, 2021.
Prior Publication US 2023/0121567 A1, Apr. 20, 2023
Int. Cl. B41J 2/14 (2006.01)
CPC B41J 2/14072 (2013.01) [B41J 2/14 (2013.01); B41J 2002/14491 (2013.01); B41J 2202/18 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A liquid ejection head, comprising:
an element substrate in which a liquid ejection port is formed, the element substrate having an energy generating element that generates energy for ejecting the liquid from the liquid ejection port, and a plurality of wiring pads aligned in a predetermined direction;
a flexible wiring substrate having a plurality of leads aligned in the predetermined direction and overlaid on and connected to, respectively, the plurality of wiring pads, and a base film overlaid on the plurality of leads at a side opposite to that of the plurality of wiring pads; and
a sealant that seals a plurality of connection portions of the plurality of wiring pads and the plurality of leads,
wherein the base film has:
a plurality of covering portions that respectively cover the plurality of leads at a side opposite to that of the plurality of connection portions; and
an opening or slit formed between the plurality of covering portions.