PROBLEM TO BE SOLVED: To provide a fine hollow protrusion manufacturing method capable of inexpensively and stably mass-producing fine hollow protrusions having high accuracy in the height of the fine hollow protrusions and including through-holes having high accuracy in the dimension of the through-holes.SOLUTION: The fine hollow protrusion 1 manufacturing method according to the present invention, including through-holes 3h comprises a protrusion part forming step of bringing a convex part 11 having heating means into contact from one face 2D side of a substrate sheet 2 and, while softening with heat a contact portion TP, penetrating the substrate sheet 2 with the convex part 11 and forming a protrusion part precursor 3b which protrudes from another face 2U and has a through-hole 3h. The method further comprises a protrusion extension step of, while softening with heat the contact portion TP, further penetrating the substrate sheet 2A with the convex part 11 and forming the protrusion part 3 further protruding from the other face 2U.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】微細中空突起物の高さ及び貫通孔の大きさの精度の高い貫通孔を有する微細中空突起物を、低コストで、安定的に、大量生産できる微細中空突起物の製造方法を提供すること。【解決手段】本発明の貫通孔3hを有する微細中空突起物1の製造方法は、基材シート2の一面2Dから、加熱手段を備える凸型部11を当接させ、当接部分TPを熱により軟化させながら凸型部11を基材シート2に刺してゆき、他面2Uから突出させると共に貫通孔3hを有する中空の突起部前駆体3bを形成する突起部前駆体形成工程を備える。また、当接部分TPを熱により軟化させながら凸型部11を基材シート2Aに更に刺してゆき、他面側2Uから更に突出する突起部3を形成する突起伸長工程を備える。【選択図】図4
