A formation method for flow guiding structures of a thin laminate comprises: step A: forming a plurality of holes on a thin laminate step B: forming on a first side a plurality of ribs which are protruded relative to the first side and step C: forming on the first side a plurality of grooves which are concaved relative to the first side, making the thin laminate have better flow guiding effect.一種薄層物,包含一第一側面、一第二側面、複數凸肋,及複數凹槽,第二側面相反於該第一側面,複數凸肋相對於該第一側面隆起,各該凸肋沿其長度方向的局部段形成一呈凹陷的溝槽,該溝槽用於導流及破壞流體的表面張力,複數凹槽相對於該第一側面凹陷,各該凹槽沿其長度方向的局部段形成一呈隆起的島狀,各該凹槽及該島狀用於破壞流體的表面張力,藉此,使薄層物具有較佳之導流效果。11~13‧‧‧步驟
