Patent ID: 6309057
Filing Date: 2001-10-30
Classification: B41J

Abstract:
An ink-jet recording head, comprising:a nozzle plate provided with nozzle openings for jetting ink droplets;a spacer provided with pressure generating chambers, ink supply ports, and reservoirs;said nozzle plate being fixed to one surface of said spacer, a plate member fixed to another surface of said spacer so as to be opposite to said nozzle plate, said spacer and said plate member being sandwiched and fixed to each other, said nozzle openings each communicating with a respective one of said pressure generating chambers; andpressure generating means for applying a change of pressure to said pressure generating chambers to form said ink droplets;wherein the improvement comprises:said spacer is a silicon single crystal substrate having a crystal orientation (110),said pressure generating chambers, said ink supply ports, and said reservoirs are through-holes in said spacer and are in communication with each other,said spacer further comprises cantilevered partitions each having a respective fixed end and a respective free end, each of said partitions separating respective adjacent ones of said pressure generating chambers at said respective fixed end, each of said partitions separating respective adjacent ones of said ink supply ports at said respective free end, said respective free end being wider than said respective fixed end;said spacer further comprises a body to which said respective fixed end of each of said cantilevered partitions is connected;said respective free end of each of said cantilevered partitions has a first side face and a second side face;said first side face of said respective free end extending linearly from said respective free end to said respective fixed end, and said second side face of said respective free end being parallel to said first side face;the spacer includes wall surfaces at said through holes; andall of said wall surfaces have a surface parallel with one of the four faces constituting a parallelogram with two different interior angles, and all of said wall surfaces have a crystal orientation of (111).