improves the tolerance of abutting the heater chips the tolerance of this method is about 0 25 micron verses about 1 micron tolerance when a four step cut is used fig9 shows the end structure of the heater chips assembly of this invention in this invention the heater chips 84 84 a and 84 b are abutted together and then the channel plate 82 is aligned and bonded to the heater chip assembly to assemble a print head bar 80 fig1 of this invention all the heater chips 84 84 a and 84 b must be placed in an alignment and assembly fixture and pushed against the fixture for alignment in an abutting relationship next a monolithic page wide channel plate 82 is flipped onto the assembled heater chips after aligning the channels of the channel plate with the heating elements 88 88 b and 88 c of the heater chip the channel plate is bonded to the assembly of the heater chips as shown in fig1 while the embodiment of fig9 and 10 utilizes abutting heater chips it should be understood that the heater chips could be cut to have a shorter length and a space can be left between the heater chips along the junction lines 85 85 a and 85 b.