Patent ID: 8119453

Claim:
A method of manufacturing semiconductor chips each having the form of a chip size package, comprising: a substrate preparing step of preparing a semiconductor substrate having on its front surface a plurality of chip forming areas each corresponding to one of said semiconductor chips; a support sticking step of sticking a support to the front surface of said semiconductor substrate via an adhesive sheet; a through-hole forming step of forming a through hole, for a through electrode, extending from the back surface of said semiconductor substrate in each of said chip forming areas; a groove forming step of forming a groove along each of boundaries between said chip forming areas before/after, or at the same time as, said through-hole forming step, said groove extending from the back surface of said semiconductor substrate through said adhesive sheet to said support to expose cross-sections of said adhesive sheet; an insulating film forming step of forming an insulating film over the back surface of said semiconductor substrate so as to cover side walls of said through holes and the cross-sections of said adhesive sheet; and a chip dividing step of dicing said semiconductor substrate along said grooves with the insulating film formed on side walls of said grooves remaining, thereby dividing it into said semiconductor chips.