Abstract:
A method for producing a micromechanical component includes providing a substrate with a monocrystalline starting layer which is exposed in structured regions. The structured regions have an upper face and lateral flanks, wherein a catalyst layer, which is suitable for promoting a silicon epitaxial growth of the exposed upper face of the structured monocrystalline starting layer, is provided on the upper face, and no catalyst layers are provided on the flanks. The method also includes carrying out a selective epitaxial growth process on the upper face of the monocrystalline starting layer using the catalyst layer in a reactive gas atmosphere in order to form a micromechanical functional layer.
Abstract:
A method for forming a coating of material on selected portions of a surface of a substrate having a plurality of cavities, each cavity having outer, peripheral sidewalls extending outwardly from the surface. The method includes: providing a structure having a release agent thereon; contacting top surface of the wafer with the release agent to transfer portions of the release agent to the top surface of the wafer while bottom portions of the cavities remain spaced from the release agent to produce an intermediate structure; the release agent disposed on the top surface of the wafer and with the bottom portions of the cavities void of the release agent; exposing the intermediate structure to the material to blanket coat the material on both the release agent and the bottom portions of the cavities; and selectively removing the release agent together with the coating material while leaving the coating material on the bottom portions of the cavities.
Abstract:
A micro-electromechanical device and method of manufacture are disclosed. A sacrificial layer is formed on a silicon substrate. A metal layer is formed on a top surface of the sacrificial layer. Soft magnetic material is electrolessly deposited on the metal layer to manufacture the micro-electromechanical device. The sacrificial layer is removed to produce a metal beam separated from the silicon substrate by a space.
Abstract:
The present application for patent is in the field of microreactors and more specifically in the field of microreactors which are prepared from flexible substrates. Methods of preparing flexible substrates using various printing methods are also disclosed.
Abstract:
Multilayer structures are electrochemically fabricated on a temporary (e.g. conductive) substrate and are thereafter bonded to a permanent (e.g. dielectric, patterned, multi-material, or otherwise functional) substrate and removed from the temporary substrate. In some embodiments, the structures are formed from top layer to bottom layer, such that the bottom layer of the structure becomes adhered to the permanent substrate, while in other embodiments the structures are form from bottom layer to top layer and then a double substrate swap occurs. The permanent substrate may be a solid that is bonded (e.g. by an adhesive) to the layered structure or it may start out as a flowable material that is solidified adjacent to or partially surrounding a portion of the structure with bonding occurs during solidification. The multilayer structure may be released from a sacrificial material prior to attaching the permanent substrate or it may be released after attachment.
Abstract:
Methods for creating one or more structures in a micromachined device. In one arrangement, the methods include the steps of providing a substrate, forming upstanding nonconductive mold walls on the substrate so that first and second wells are formed, the second well being wider than the first well. The method further includes applying a first material to the surface of the wells so that the first well fills with the first material before the second well, and removing the first material from the second well while leaving a portion in the first well.
Abstract:
In described examples, a hermetic package of a microelectromechanical system (MEMS) structure includes a substrate having a surface with a MEMS structure of a first height. The substrate is hermetically sealed to a cap forming a cavity over the MEMS structure. The cap is attached to the substrate surface by a vertical stack of metal layers adhering to the substrate surface and to the cap. The stack has a continuous outline surrounding the MEMS structure while spaced from the MEMS structure by a distance. The stack has: a first bottom metal seed film adhering to the substrate and a second bottom metal seed film adhering to the first bottom metal seed film; and a first top metal seed film adhering to the cap and a second top metal seed film adhering to the first top metal seed film.
Abstract:
A method for manufacturing a device having a three-dimensional magnetic structure includes applying or introducing magnetic particles onto or into a carrier element. A plurality of at least partly interconnected cavities are formed between the magnetic particles, which contact one another at points of contact, by coating the arrangement of magnetic particles and the carrier. The cavities are penetrated at least partly by the layer generated when coating, resulting in the three-dimensional magnetic structure. A conductor loop arrangement is provided on the carrier or a further carrier. When a current flows through the conductor loop, an inductance of the conductor loop is changed by the three-dimensional magnetic structure, or a force acts on the three-dimensional magnetic structure or the conductor loop by a magnetic field caused by the current flow, or when the position of the three-dimensional magnetic structure is changed, a current flow is induced through the conductor loop.
Abstract:
In described examples, a hermetic package of a microelectromechanical system (MEMS) structure includes a substrate having a surface with a MEMS structure of a first height. The substrate is hermetically sealed to a cap forming a cavity over the MEMS structure. The cap is attached to the substrate surface by a vertical stack of metal layers adhering to the substrate surface and to the cap. The stack has a continuous outline surrounding the MEMS structure while spaced from the MEMS structure by a distance. The stack has: a first bottom metal seed film adhering to the substrate and a second bottom metal seed film adhering to the first bottom metal seed film; and a first top metal seed film adhering to the cap and a second top metal seed film adhering to the first top metal seed film.
Abstract:
A method for fabricating packaged semiconductor devices (100) with an open cavity (110a) in panel format; placing (process 201) on an adhesive carrier tape a panel-sized grid of metallic pieces having a flat pad (230) and symmetrically placed vertical pillars (231); attaching (process 202) semiconductor chips (101) with sensor systems face-down onto the tape; laminating (process 203) and thinning (process 204) low CTE insulating material (234) to fill gaps between chips and grid; turning over (process 205) assembly to remove tape; plasma-cleaning assembly front side, sputtering and patterning (process 206) uniform metal layer across assembly and optionally plating (process 209) metal layer to form rerouting traces and extended contact pads for assembly; laminating (process 212) insulating stiffener across panel; opening (process 213) cavities in stiffener to access the sensor system; and singulating (process 214) packaged devices by cutting metallic pieces.