| 摘要 |
An extruded structure having an equilibrium shape on a substrate is provided to co-extrude multiple similar and/or dissimilar materials to form relatively fine structures at relatively high aspect ratios. A micro extrusion apparatus(100) for producing an extruded structure(120) having an equilibrium shape on a substrate(101) comprises a first sheet(210), a second sheet(230), an extrusion head(130), and a unit for moving the extrusion head relative to the substrate. The first sheet has a first surface and a first side edge(219). The second sheet has a second surface and a second side edge(239). The second sheet is mounted on the first sheet such that a flat portion of the second surface abuts the first surface, and the second side edge is aligned with the first side edge, whereby the first and second side edges form an edge surface of the extrusion head. The second surface of the second sheet defines an elongated trench(232) extended from the second side edge and having a concave oblique surface, thereby forming a fluidic channel(132,133,134) having an outlet orifice(135) including a straight first edge(136) defined by the first sheet, and an oblique second edge(137) defined by the elongated trench. The unit moves the extrusion head relative to the substrate while forcing material through the fluidic channel such that material is extruded from the outlet orifice and forms an associated extruded structure on the substrate, wherein the extruded structure has a flat lower surface that is formed by the flat first edge of the orifice and is in contact with the surface, and an upper surface that is formed by the curved second edge of the outlet orifice and faces away from the substrate. |
