Patent ID: 8198175

Claim:
A processing method for a package substrate having a base substrate partitioned by a plurality of crossing division lines to form a plurality of chip forming areas where a plurality of semiconductor chips are respectively formed and molded with resin, said package substrate having a resin surface on the mold resin and an electrode surface on the base substrate opposite to said resin surface, said processing method comprising: a warp correcting step of cutting said package substrate from said resin surface or said electrode surface through the base substrate and at least a portion of the mold resin along said division lines by using a cutting blade to form a cut groove, thereby correcting a warp of said package substrate; and a grinding step of grinding said resin surface of said package substrate in the condition where said electrode surface of said package substrate is held on a holding table after performing said warp correcting step, thereby reducing the thickness of said package substrate to a predetermined thickness and divide said package substrate into the plurality of semiconductor chips.