Method of forming an inkjet printhead with channels connecting t

Details Method of forming an inkjet printhead with channels connecting t Method of forming an inkjet printhead with channels connecting t

1995-10-30

1998-05-26

Echols, P. W.

Metal working

Method of mechanical manufacture

Fluid pattern dispersing device making, e.g., ink jet

347 47, 347 65, B23P 1500

Patent

active

057550328

ABSTRACT:
A method to eliminate ink trajectory errors when an inkjet printhead is fabricated is disclosed. In a preferred embodiment, a nozzle member containing an array of orifices is affixed to a barrier layer formed on a having heater elements formed thereon. The nozzle member is affixed to the barrier layer using heat and pressure. The back surface of the nozzle member extends beyond the outer edges of the substrate. During the heating and pressure step used to affix the nozzle member to the barrier layer, the nozzle member tends to undesirably bend over the outer edges of the barrier layer, causing the nozzles to be tilted outward. To avoid the foregoing the barrier layer is formed with one or more trenches parallel to the long edges of the barrier layer to cause the nozzle member to dip and bend over the trenches in an amount approximately equal to the bend into the ink channels on the outer edge of the substrate. The nozzles are located at the crest of the bent nozzle member and, thus, remain normal to the surface of the printhead. The trenches are in fluidic communication with all ink ejection chambers via the rear channels and trenches which may extend the entire length of the barrier layer. The trenches and rear channels provide for an increased refill rate for the ink ejection chambers and also provide for good particle tolerance and good TAB head assembly lamination yields.

REFERENCES:
patent: 5305018 (1994-04-01), Schantz et al.
patent: 5467115 (1995-11-01), Childers

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