Patent ID: 8523333

Claim:
A thin plate stacked structure comprising a plurality of thin plates which are stacked with an adhesive, the plurality of thin plates including at least one pattern-formed thin plate provided with a hole or a recess formed on at least one surface to extend in a predetermined direction, the stacked structure further comprising: a release grove pattern, comprising one or more release grooves, which is formed on the at least one surface of the pattern-formed thin plate and which releases the adhesive; wherein the release groove pattern has a longitudinal dimension extending along the predetermined direction and a width dimension perpendicular to the longitudinal dimension; and wherein none of the one or more release grooves intersect with any other grooves formed on the at least one surface of the pattern-formed thin plate; and wherein the release groove pattern extends along the predetermined direction without the one or more release grooves having any straight portion extending parallel to the predetermined direction and any straight portion extending perpendicular to the predetermined direction.