| 摘要 |
PURPOSE:To enhance the yield of production of an ink jet recording head, by providing a plurality of ejecting ports for ejecting a liquid, a plurality of first heat generating elements disposed correspondingly to the ejecting ports, respectively, and second heat generating elements each of which is disposed over the positions of a plurality of the first heat generating elements. CONSTITUTION:Ejecting heat generating elements 1 are so provided that 64 ones thereof constitute one block, and heat generating elements 6 for preliminary heating are provided, one for each block, on the lower side of the elements 1, with an insulating layer 5 therebetween. Thus, 64 ejecting heat generating elements 1 are disposed for each one of the heat generating elements 6 for preliminary heating. When both heat generating signals are applied through a selective combination of driving electrodes 11 (I1-I64) for the ejecting heat generating elements and driving electrodes 10 (S1-S52), a recording liquid reaches a predetermined foaming temperature at the part in a liquid chamber 4 at which the signals are applied, and a bubble is generated in the recording liquid present on the upper side of the ejecting heat generating element 1, whereby the liquid can be ejected through an orifice 2. |
