Patent ID: 7518183

Claim:
A semiconductor device having a trench gate type MISFET formed on a semiconductor substrate, comprising: a plurality of first grooves extending in a first direction on the semiconductor substrate, said first grooves being connected with each other; a second groove extending in a second direction on the semiconductor substrate, said second direction crossing the first direction, and said second groove being connected with the first grooves; a plurality of gate electrodes of the trench gate type MISFET formed in the first grooves respectively, said gate electrodes being connected with one another; a gate extraction electrode formed in the second groove, said gate extraction electrode being connected with the gate electrode; an insulating film formed over the gate electrode and the gate extraction electrode; a contact groove formed in the insulating film, said contact groove reaching an upper surface of the gate extraction electrode; and a gate line formed over the insulating film, said gate line being electrically connected with the gate extraction electrode, wherein each of terminal portions of the first grooves connects with the second groove; and each of terminal portions of the gate electrodes connects with the gate extraction electrode; and the contact groove is located directly above the second groove.