paste as shown in fig2 c on an upper surface of the base plate 1 behind the heater substrate 2 a mounted printed circuit board pcb 4 is secured by a double sided adhesive tape further an ink supply member 5 is joined from above to the upper surface of the top plate 3 through an ink supply path formed in the ink supply member 5 an ink is supplied to the top plate 3 the ejection energy generation devices on the heater substrate 2 are electrically connected individually to wires on the pcb 4 by wire bonding fig4 is a schematic front view showing an inner construction of one embodiment of an ink jet printing apparatus with an ink jet print head of this invention in fig4 the ink jet printing apparatus comprises a plurality of ink jet print heads 11 recovery units 12 one for each of the print heads ink tanks 13 a transport unit 14 an operation panel 15 and a paper feed unit 16 a sheet of paper is supplied from the paper feed unit to the transport unit and the print heads are moved by a drive means not shown to a print position for printing fig5 a and 5b show details of an ink ejection portion in a conventional ink jet print head fig5 a illustrates ink ejection nozzles as seen from the front fig5 b is a top view of fig5 a fig5 b does not show the pcb 4 and an ink supply member 5 for convenience as described above the base plate.