To provide a multi-irregularity plate with many irregularities having a large protruded quantity and arranged nearby and to easily manufacture it.
Multiple projections 3 or recesses protruded or recessed at least in one direction of the thickness direction of a reference plate face 2 are arranged apart from each other at least in two directions in parallel with the plate face 2. The protruded height or recessed depth of the projections or recesses from the reference plate face 2 is set to 1.5 times or above of the thickness of the reference plate face 2. The maximum outer diameter size in the plate face direction of the projections 3 or the maximum inner diameter size in the plate face direction of the recesses is set to the pitch or above of the projections 3 or the pitch or above of the recesses.
SHIMODA KOJI
FUNATSU JUN
