Abstract:
A method for forming micromachined devices out of a polycrystalline silicon substrate using deep reactive ion etching to form the micromachined device. The method comprises the steps of providing a bulk material substrate of polycrystalline silicon, and etching the bulk material using deep reactive ion etching to form the micromachined device. The present invention also includes a method for forming a micromachined device comprising the steps of providing a first layer of single crystal silicon and etching a first set of elements on the first layer. The method further includes the steps of providing a second layer of single crystal silicon, etching a second set of elements on the second layer, and joining the first and second layers together such that the crystal planes of the first layer and the second layer are misaligned and such that the first set and the second set of elements are properly aligned.
Abstract:
A microfluidic device (100) for mixing a liquid L is provided. The microfluidic device (100) comprises a microfluidic chamber (20), having an inlet (30), and arranged to receive the liquid L therein. In use, the microfluidic device (100) is arranged to control translation through the liquid L of a body B introduced therein, wherein the translation of the body B is due to a potential field acting on the body. In this way, the controlled translation of the body B mixes the liquid L in the microfluidic chamber (20).
Abstract:
The present disclosure is drawn to inertial pumps. An inertial pump can include a microfluidic channel, a fluid actuator located in the microfluidic channel, and a check valve located in the microfluidic channel. The check valve can include a moveable valve element, a narrowed channel segment located upstream of the moveable valve element, and a blocking element formed in the microfluidic channel downstream of the moveable valve element. The narrowed channel segment can have a width less than a width of the moveable valve element so that the moveable valve element can block fluid flow through the check valve when the moveable valve element is positioned in the narrowed channel segment. The blocking element can be configured such that the blocking element constrains the moveable valve element within the check valve while also allowing fluid flow when the moveable valve element is positioned against the blocking element.
Abstract:
A microstructure and a method for manufacturing the same includes: disposing a liquid film on a surface of a substrate, wherein a solid-liquid interface is formed where the liquid film is in contact with the substrate; and irradiating the substrate with a laser of a predetermined waveband to etch the substrate at the solid-liquid interface, wherein the position where the laser is irradiated on the solid-liquid interface moves at least along a direction parallel to the surface of the substrate, and the absorption rate of the liquid film for the laser is greater than the absorption rate of the substrate for the laser.
Abstract:
An additive manufacturing process includes forming an object material stack using sheet materials without use of binder material between the sheet materials and forming features of the cross-sectional layers of a 3D object in the corresponding sheet materials. Another process involves forming features of the cross-sectional layers of a 3D object in soot layers of a laminated soot sheet. A manufactured article includes three or more glass layers laminated together without any binder material between the glass layers. At least one of the glass layers is composed of silica or doped silica, and at least one feature is formed in at least one of the glass layers.
Abstract:
Techniques for fabricating horizontally aligned nanochannels are provided. In one aspect, a method of forming a device having nanochannels is provided. The method includes: providing a SOI wafer having a SOI layer on a buried insulator; forming at least one nanowire and pads in the SOI layer, wherein the nanowire is attached at opposite ends thereof to the pads, and wherein the nanowire is suspended over the buried insulator; forming a mask over the pads, the mask having a gap therein where the nanowire is exposed between the pads; forming an alternating series of metal layers and insulator layers alongside one another within the gap and surrounding the nanowire; and removing the nanowire to form at least one of the nanochannels in the alternating series of the metal layers and insulator layers. A device having nanochannels is also provided.
Abstract:
Techniques for fabricating horizontally aligned nanochannels are provided. In one aspect, a method of forming a device having nanochannels is provided. The method includes: providing a SOI wafer having a SOI layer on a buried insulator; forming at least one nanowire and pads in the SOI layer, wherein the nanowire is attached at opposite ends thereof to the pads, and wherein the nanowire is suspended over the buried insulator; forming a mask over the pads, the mask having a gap therein where the nanowire is exposed between the pads; forming an alternating series of metal layers and insulator layers alongside one another within the gap and surrounding the nanowire; and removing the nanowire to form at least one of the nanochannels in the alternating series of the metal layers and insulator layers. A device having nanochannels is also provided.
Abstract:
Embodiments of methods for sealing a glass microstructure assembly comprise providing one or more side retainer members on a base plate adjacent the glass microstructure assembly, the side retainer members having a height less than an uncompressed height defined by the glass microstructure assembly. The methods also comprise compressing the glass microstructure assembly via a load bearing top plate in intimate contact with the top glass layer while heating the glass microstructure assembly and the top plate to a glass sealing temperature, the glass sealing temperature being a temperature sufficient to make glass viscous, wherein the glass microstructure assembly is compressed until the load bearing top plate contacts the side retainer members, and wherein the lower surface of the top plate maintains adhesion to the upper surface of the top glass layer at the glass sealing temperature while the load bearing plate is supported by the side retainer members.
Abstract:
A photostructurable ceramic is processed using photostructuring process steps for embedding devices within a photostructurable ceramic volume, the devices may include one or more of chemical, mechanical, electronic, electromagnetic, optical, and acoustic devices, all made in part by creating device material within the ceramic or by disposing a device material through surface ports of the ceramic volume, with the devices being interconnected using internal connections and surface interfaces.
Abstract:
A microfluidic device is formed from a cover member and a microfluidic precursor that is prepared from a photosensitive element. The photosensitive element is a solid layer of a photopolymerizable composition that includes at least a binder, a monomer, and a photoinitiator. A method for forming the microfluidic device from the photosensitive element includes imagewise exposing the photopolymerizable layer to actinic radiation through a mask and treating to form a relief surface having microstructures or features, such as one or more channels and one or more chambers, that are suitable for use in the microfluidic device. The method provides microstructures that can be formed to have different dimensions that provide particular advantages for a microfluidic device that is operated by degas-driven flow to transport a fluid through the microstructures.