Patent ID: 6872597

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: (a) mounting a plurality of semiconductor chips on a first surface of a first substrate; (b) setting the first substrate with the plural semiconductor chips mounted thereon into a mold so that a second surface of the first substrate opposite to the first surface faces a lower mold half of the mold and so that the plural semiconductor chips on the first surface are received into one cavity of the mold; (c) sealing the plural semiconductor chips with resin in a block to form a seal member while interposing a film between an upper mold half of the mold and the first surface of the first substrate; (d) releasing the seal member from the mold with use of the film; and (e) cutting the first substrate and the seal member into individual semiconductor devices, wherein the first substrate has conductor patterns for wiring which are electrically connecting corresponding semiconductor chips, and conductor patterns for dummy which are divided from the conductor patterns for wiring, and wherein, in the sealing step with resin, the film is vacuum-chucked to the upper mold half of the mold.