Patent ID: 7517058

Claim:
An ink jet recording head comprising: an orifice plate having orifices for discharging ink; a substrate having a plurality of discharge pressure generating elements for discharging ink from said orifices and an ink supply port for supplying ink to said discharge pressure generating elements; a plurality of separate flow paths corresponding to said discharge pressure generating elements; and a common flow path communicating with said separate flow paths and said ink supply port, wherein said substrate includes a plurality of beam portions formed to divide said ink supply port, a recess is formed in a region corresponding to said common flow path of said substrate, said recess extending to said separate flow paths formed nearest to said beam portions, and a shallow recess is formed in a region extending to said separate flow paths other than said separate flow paths formed nearest to said beam portion, and said shallow recess has a shallower depth than a depth from a bottom of said common flow path to a bottom of said recess.