A production method for a magnetic recording medium including forming thin
films on a substrate using a sputtering method with a target, wherein the
target on which an annular-shaped erosion area is formed during
sputtering and a substrate holder on which a plurality of substrates are
mounted are installed, opposed in parallel, in a manner such that center
axes of the target and the substrate holder align with each other, and
the substrates are mounted on the substrate holder in positions such that
R3/R1 is 1.1 or smaller and R4 is R2 or greater to form thin films.