To improve the heat transfer characteristics of various surfaces of components requiring the surface roughness equivalent to that of a metal component used in a turbine engine.

A casting includes a heat transfer surface having a large number of cavities. The density of the large number of cavities is about 25 piece/cm2 to about 1,100 piece/cm2 to increase the surface area, and the heat transfer capacity is increased accordingly. A mold to form a pattern to form the casting is also provided. The mold includes a surface for demarcating a part of a chamber, and a large number of particles having the mean grain size of about 300-2,000 μm are adhered thereto.