Fluid manifold and methods of making the same

1. An ink manifold for use with a heater chip in an inkjet printhead, comprising:

a first planar surface and a second opposite planar surface;

a plurality of ink channels located on the first planar surface of the ink manifold for supplying ink to the heater chip, the plurality of ink channels in liquid communication with respective backside ink trenches of the heater chip; and

a plurality of ink ports located on the second opposite planar surface of the ink manifold, each of the plurality of ink ports being in liquid communication with a respective one of the plurality of ink channels;

each of the plurality of ink channels having a bottom wall defined by bottom wall portions that rise from each ink port within the ink channel to a maximum height at an angle of at least 12 degrees.

2. The ink manifold of claim 1 , wherein the angle is within a range of 20 degrees to 30 degrees.

3. The ink manifold of claim 1 , wherein the ink manifold is made of ceramic.

4. The ink manifold of claim 3 , wherein a plurality of ink manifolds are attached to a corresponding number of heater chips to define respective printhead components, and the printhead components are mounted to a base member having ink passageways for carrying plural colors of ink from respective ink reservoirs to the ink ports of each ink manifold.

5. The ink manifold of claim 4 , wherein the base member is made of plastic.

6. The ink manifold of claim 4 , wherein each ink manifold is joined to the corresponding number of heater chips by adhesive.

7. The ink manifold of claim 5 , further comprising a gasket seal that joins the plurality of ink manifolds to the base member.

8. The ink manifold of claim 1 , wherein the ink ports associated with each one of the plurality of ink channels are offset from the ink ports associated with each adjacent one of the ink channels.

9. The ink manifold of claim 1 , wherein the plurality of ink ports are separated by a distance within a range of 2.5 mm to 3.5 mm.

10. A method of fabricating an ink manifold for use with a heater chip in an inkjet printhead, comprising:

providing an ink manifold substrate;

forming a plurality of ink channels in one surface of the ink manifold substrate so as to be in liquid communication with respective backside ink trenches of the heater chip when the ink manifold is bonded to the heater chip;

forming a plurality of ink ports in an opposite surface of the ink manifold substrate, each of the plurality of ink ports being in liquid communication with a respective one of the plurality of ink channels;

each of the plurality of ink channels having a bottom wall defined by bottom wall portions that rise from each ink port within the ink channel to a maximum height at an angle of at least 12 degrees.

11. The method of claim 10 , wherein the angle is within the range of 20 degrees to 30 degrees.

12. The method of claim 10 , wherein the ink manifold is made of ceramic.

13. The method of claim 12 , further comprising the step of joining the ink manifold to a base member using a gasket seal, the base member having ink passageways for carrying plural colors of ink from respective ink reservoirs to the plurality of ink ports.

14. The method of claim 10 , wherein the ink ports associated with each one of the plurality of ink channels are offset from the ink ports associated with each adjacent one of the ink channels.

15. The method of claim 10 , wherein the plurality of ink ports are separated by a distance within a range of 2.5 mm to 3.5 mm.