GRINDING METHOD

To provide a grinding method which does not require a considerably longer time in comparison with a conventional grinding method and in which an effective region that can be used for products can be maximally secured.SOLUTION: A grinding method which is applied in grinding a discoid work-piece which has a first surface and a second surface at the opposite side to the first surface when grinding it beginning from the second surface side, includes: a first grinding step of grinding the work-piece while bringing a first grinding stone into contact with the work-piece to form on the work-piece a discoid first thin plate part and an annular first thick plate part surrounding the first thin plate part; and a second grinding step of grinding the work-piece while bringing a second grinding stone into contact with the first thick plate part and the first thin plate part to form on the work-piece a discoid second thin plate part which is larger in diameter and thinner than the first thin plate part and an annular second thick plate part surrounding the second thin plate part, where in the second grinding step, the second grinding stone is brought into contact with a region on the second surface away by a width of the second grinding stone or more from an inner edge of the second surface remaining in the first thick plate part toward the outside.SELECTED DRAWING: Figure 6 【課題】従来の研削方法に比べて大幅に長い時間を要することなく、製品に使用できる有効領域が最大限に確保される研削方法を提供する。【解決手段】第１面と第１面とは反対側の第２面とを有する円板状の被加工物を第２面側から研削する際に適用される研削方法であって、第１研削砥石を被加工物に接触させて被加工物を研削し、円板状の第１薄板部と、第１薄板部を囲む環状の第１厚板部と、を被加工物に形成する第１研削ステップと、第２研削砥石を第１厚板部と第１薄板部とに接触させて被加工物を研削し、第１薄板部よりも直径が大きく薄い円板状の第２薄板部と、第２薄板部を囲む環状の第２厚板部と、を被加工物に形成する第２研削ステップと、を含み、第２研削ステップでは、第１厚板部に残った第２面の内側の縁から外側に向かって第２研削砥石の幅以上に離れた第２面上の領域に第２研削砥石を接触させる。【選択図】図６