Patent ID: 8236621

Claim:
A molding method implemented by a mold resin sealing device including a first mold die and a second mold die, in which the first mold die includes a first part having a first surface and having an opening in a central region of the first surface, the first surface facing a second surface of the second mold die, the first mold die includes a first step-like movable part capable of moving in the opening in a first direction toward the second mold die and a second direction away from the second mold die, the method comprising: setting a semiconductor wafer on the second surface of the second mold die and setting a mold resin on an upper surface of the first step-like movable part, the upper surface being higher than the first surface; and moving the second mold die toward the first mold die to press and spread the mold resin, wherein the first step-like movable part is moved in the second direction away from the second mold die to thereby reduce a height difference between the first surface and the upper surface while the mold resin is pressed and spread by the second mold die, wherein the height difference is zero when the pressing and spreading of the mold resin is completed.