US Patent Issued to CANON on Dec. 23 for "Joined substrate, droplet ejection head, and method of manufacturing joined substrate" (Japanese Inventors)

ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,888, issued on Dec. 23, was assigned to CANON K.K. (Tokyo).

"Joined substrate, droplet ejection head, and method of manufacturing joined substrate" was invented by Kazuhisa Okano (Tokyo) and Manabu Otsuka (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a joined substrate in which a first substrate, a second substrate, and a third substrate are joined in this order with an adhesive agent therebetween, the joined substrate comprising: one or more grooves formed in a groove region of a surface of the first substrate not facing the second substrate; and a bulging portion formed in a back region of a surface of the second subs...