Laminate constructs for micro-fluid ejection devices
View Patent ↗A micro-fluid ejection head has an ejection chip to expel fluid. It connects to a laminate construct. The construct has vertically configured wiring layers interspersed with non-conductive layers, such as carbon fiber layers. An upper of the wiring layers electrically connects to the ejection chip. The upper layer may also support a planar undersurface of the chip directly on a surface or in a recessed pocket. The two can connect with a die bond, such as one having silica or boron nitride. Fluid connections exist between ink feed slots of the chip and the laminate construct. A silicon tile or other material may also fluidly interconnect with the two. A plastic manifold optionally supports the laminate construct and may fluidly connect to it. The wiring layers of the laminate contemplate ground, power, and various bond pads. Other construct layers contemplate prepreg or core FR4 layers.
1. A micro-fluid ejection head for use in a micro-fluid ejection device, comprising:
an ejection chip that expels fluid toward a print media, the ejection chip comprising a fluid feed slot; and
a laminate construct that supports the ejection chip, the laminate construct comprising:
a plurality of electrical interconnect layers, at least one of the plurality of interconnect layers being electrically connected to the ejection chip;
conductive layers, at least one of the conductive layers being vertically stacked between two of the plurality of electrical interconnect layers, the conductive layers comprising carbon fiber; and
an ink feed slot in fluid communication with the fluid feed slot of the ejection chip, the ink feed slot passing through the electrical interconnect layers and the conductive layers.
2. The micro-fluid ejection head of claim 1 , further comprising a tile layer in fluid communication with the ejection chip and the laminate construct.
3. The micro-fluid ejection head of claim 2 , wherein the tile layer is disposed between the ejection chip and the laminate construct.
4. The micro-fluid ejection head of claim 2 , wherein the tile layer is made of silicon.
5. The micro-fluid ejection head of claim 1 , further comprising a manifold that supports the laminate construct.
6. The micro-fluid ejection head of claim 5 , wherein the manifold is a plastic manifold.
7. The micro-fluid ejection head of claim 5 , wherein the ejection chip is disposed within a recessed pocket of the laminate construct.
8. The micro-fluid ejection head of claim 5 , further comprising a tile layer in fluid communication with the ejection chip, the laminate construct and the manifold.
9. The micro-fluid ejection head of claim 8 , wherein the tile layer is disposed between the laminate construct and the manifold.