Solution injector head, functional layer forming apparatus and liquid crystal display

A liquid crystal display comprising,

• a pair of base plates, each of which base plates includes a substrate, a transparent electrode and an oriented layer,
• a spacer through which the base plates are spaced apart from each other while the oriented layers of the base plates face to each other,
• a sealing member extending between the base plates to form a closed space between the base plates, and
• a liquid crystal contained in the closed space,
• wherein the oriented layer is formed by an apparatus with emitting a solution as a material of the oriented layer onto the substrate, comprising,
• a solution emitting head for emitting the solution through an outlet of the solution emitting head, including, a main body including a cavity, a cover attached to the main body in such a manner that the cover covers the cavity to form a chamber so that the solution is stored in the chamber temporarily before being emitted from the outlet, and a solution pressurizing device for pressurizing the solution in the chamber, wherein the cover is fixedly attached to the main body by one of metal-to-metal bonding and an adhesive dissolution-resistant against the solution between the cover and the main body, and
• a table adapted to hold the substrate thereon and movable with respect to the solution emitting head while the solution emitting head emits the solution onto the substrate so that the solution is distributed on the substrate to form the oriented layer.

A method for forming a liquid crystal display by an apparatus for forming a layer by emitting a solution as a material of the layer onto a substrate, comprising,

• a solution emitting head for emitting the solution through an outlet of the solution emitting head, including, a main body including a cavity, a cover attached to the main body in such a manner that the cover covers the cavity to form a chamber so that the solution is stored in the chamber temporarily before being emitted from the outlet, and a solution pressurizing device for pressurizing the solution in the chamber, wherein the cover is fixedly attached to the main body by one of metal-to-metal bonding and an adhesive dissolution-resistant against the solution between the cover and the main body, and
• a table adapted to hold the substrate thereon and movable with respect to the solution emitting head while the solution emitting head emits the solution onto the substrate so that the solution is distributed on the substrate to form the layer, comprising the steps of:
• emitting a first solution as a material of an insulating layer onto the substrate from the apparatus to form a film of the first solution on the substrate,
• drying the film of the first solution to remove a polar solvent of the first solution from the first solution so that the insulating layer is formed,
• emitting a second solution as a material of an oriented layer onto the substrate from the apparatus to form a film of the second solution on the substrate,
• drying the film of the second solution to remove a polar solvent of the second solution from the second solution so that the oriented layer is formed, and
• baking the insulating layer and oriented layer on the substrate.