Problem to be solved: to provide a method of manufacturing a fine projection unit capable of efficiently and efficiently producing a fine projection unit having a fine projection and a base part, which is difficult to limit the shape of the base part.Solution: the method of manufacturing the fine projection unit 10 of the present invention is to form a projection part 3 projecting from the side surface 2U side from the one side 2D side of the base sheet 2A including a thermoplastic resin after forming the projection part 3 projecting from the side surface 2U side, and removing the convex part 11 from the inside of the projection part 3 to form the fine projection 1 The projection forming process is provided. A bonding step is provided for joining the base surface 2a of the base sheet 2a to which the fine projection 1 is formed and the tip of the base part 4.The base sheet 2a to which the base part 4 is joined is viewed from the side of the fine projection 1, and is provided with a cut step for cutting the base sheet 2A along the contour 4L inside the contour 4L of the base part 4 to produce the fine projection unit 10.Diagram【課題】ベース部品の形状が制限され難く、微細突起具とベース部品とを備えた微細突起ユニットを効率的に精度良く製造することができる微細突起ユニットの製造方法を提供すること。【解決手段】本発明の微細突起ユニット10の製造方法は、熱可塑性樹脂を含む基材シート2Aの一面2D側から、凸型部11を当接させて他面2U側から突出する突起部3を形成した後、突起部3の内部から凸型部11を抜いて微細突起具1を形成する微細突起具形成工程を備える。微細突起具1が形成された基材シート2Aの一面2D側とベース部品4の先端とを接合する接合工程を備える。ベース部品4が接合された基材シート2Aを、微細突起具1側から平面視して、ベース部品4の輪郭4Lよりも内側で該輪郭4Lに沿って基材シート2Aをカットして微細突起ユニット10を製造するカット工程を備える。【選択図】図6
