Abstract:
Multi-layer structures are electrochemically fabricated from at least one structural material (e.g. nickel), that is configured to define a desired structure and which may be attached to a substrate, and from at least one sacrificial material (e.g. copper) that surrounds the desired structure. After structure formation, the sacrificial material is removed by a multi-stage etching operation. In some embodiments sacrificial material to be removed may be located within passages or the like on a substrate or within an add-on component. The multi-stage etching operations may be separated by intermediate post processing activities, they may be separated by cleaning operations, or barrier material removal operations, or the like. Barriers may be fixed in position by contact with structural material or with a substrate or they may be solely fixed in position by sacrificial material and are thus free to be removed after all retaining sacrificial material is etched.
Abstract:
In some embodiments, multilayer structures are electrochemically fabricated from at least one structural material (e.g. nickel), at least one sacrificial material (e.g. copper), and at least one sealing material (e.g. solder). In some embodiments, the layered structure is made to have a desired configuration which is at least partially and immediately surrounded by sacrificial material which is in turn surrounded almost entirely by structural material. The surrounding structural material includes openings in the surface through which etchant can attack and remove trapped sacrificial material found within. Sealing material is located near the openings. After removal of the sacrificial material, the box is evacuated or filled with a desired gas or liquid. Thereafter, the sealing material is made to flow, seal the openings, and resolidify. In other embodiments, a post-layer formation lid or other enclosure completing structure is added.
Abstract:
In some embodiments, multilayer structures are electrochemically fabricated from at least one structural material (e.g. nickel), at least one sacrificial material (e.g. copper), and at least one sealing material (e.g. solder). In some embodiments, the layered structure is made to have a desired configuration which is at least partially and immediately surrounded by sacrificial material which is in turn surrounded almost entirely by structural material. The surrounding structural material includes openings in the surface through which etchant can attack and remove trapped sacrificial material found within. Sealing material is located near the openings. After removal of the sacrificial material, the box is evacuated or filled with a desired gas or liquid. Thereafter, the sealing material is made to flow, seal the openings, and resolidify. In other embodiments, a post-layer formation lid or other enclosure completing structure is added.
Abstract:
Some embodiments of the present invention are directed to techniques for building up single layer or multi-layer structures on dielectric or partially dielectric substrates. Certain embodiments deposit seed layer material directly onto substrate materials while other embodiments use an intervening adhesion layer material. Some embodiments use different seed layer materials and/or adhesion layer materials for sacrificial and structural conductive building materials. Some embodiments apply seed layer and/or adhesion layer materials in what are effectively selective manners while other embodiments apply the materials in blanket fashion. Some embodiments remove extraneous depositions (e.g. depositions to regions unintended to form part of a layer) via planarization operations while other embodiments remove the extraneous material via etching operations. Other embodiments are directed to the electrochemical fabrication of multilayer mesoscale or microscale structures which are formed using at least one conductive structural material, at least one conductive sacrificial material, and at least one dielectric material. In some embodiments the dielectric material is a UV-curable photopolymer.
Abstract:
Some embodiments of the present invention are directed to techniques for building up single layer or multi-layer structures on dielectric or partially dielectric substrates. Certain embodiments deposit seed layer material directly onto substrate materials while other embodiments use an intervening adhesion layer material. Some embodiments use different seed layer materials and/or adhesion layer materials for sacrificial and structural conductive building materials. Some embodiments apply seed layer and/or adhesion layer materials in what are effectively selective manners while other embodiments apply the materials in blanket fashion. Some embodiments remove extraneous depositions (e.g. depositions to regions unintended to form part of a layer) via planarization operations while other embodiments remove the extraneous material via etching operations. Other embodiments are directed to the electrochemical fabrication of multilayer mesoscale or microscale structures which are formed using at least one conductive structural material, at least one conductive sacrificial material, and at least one dielectric material. In some embodiments the dielectric material is a UV-curable photopolymer.
Abstract:
Multi-layer microscale or mesoscale structures are fabricated with adhered layers (e.g. layers that are bonded together upon deposition of successive layers to previous layers) and are then subjected to a heat treatment operation that enhances the interlayer adhesion significantly. The heat treatment operation is believed to result in diffusion of material across the layer boundaries and associated enhancement in adhesion (i.e. diffusion bonding). Interlayer adhesion and maybe intra-layer cohesion may be enhanced by heat treating in the presence of a reducing atmosphere that may help remove weaker oxides from surfaces or even from internal portions of layers.
Abstract:
Disclosed methods reduce the discontinuities that between individual layers of a structure that is formed at least in part using electrochemical fabrication techniques. Discontinuities may exist between layers of a structure as a result of up-facing or down-facing regions defined in data descriptive of the structure or they may exist as a result of building limitations, e.g., those that result in non-parallel orientation between a building axis and sidewall surfaces of layers. Methods for reducing discontinuities may be applied to all regions or only to selected regions of the structure. Methods may be tailored to improve the accuracy between an original design of the structure and the structure as fabricated or they may simply be used to smooth the discontinuities between layers. Methods may include deposition operations that selectively favor filling of the discontinuities and/or etching operations that selectively favor removal of material from protrusions that define discontinuities.
Abstract:
Embodiments are directed to electrochemically fabricating multi-layer three dimensional structures where each layer comprises at least one structural and at least one sacrificial material and wherein at least some metals or alloys are electrodeposited during the formation of some layers and at least some metals are deposited during the formation of some layers that are either difficult to electrodeposit and/or are difficult to electrodeposit onto. In some embodiments, the hard to electrodeposit metals (e.g. Ti, NiTi, W, Ta, Mo, etc.) may be deposited via chemical or physical vacuum deposition techniques while other techniques are used in other embodiments. In some embodiments, prior to electrodepositing metals, the surface of the previously formed layer is made to undergo appropriate preparation for receiving an electrodeposited material. Various surface preparation techniques are possible, including, for example, anodic activation, cathodic activation, and vacuum deposition of a seed layer and possibly an adhesion layer.
Abstract:
A method of fabricating three-dimensional structures from a plurality of adhered layers of at least a first and a second material wherein the first material is a conductive material and wherein each of a plurality of layers includes treating a surface of a first material prior to deposition of the second material. The treatment of the surface of the first material either (1) decreases the susceptibility of deposition of the second material onto the surface of the first material or (2) eases or quickens the removal of any second material deposited on the treated surface of the first material. In some embodiments the treatment of the first surface includes forming a dielectric coating over the surface and the second material is electrodeposited (e.g. using an electroplating or electrophoretic process). In other embodiments the first material is coated with a conductive material that doesn't readily accept deposits of electroplated or electroless deposited materials.
Abstract:
Electrochemical fabrication processes and apparatus for producing multi-layer structures where each layer includes the deposition of at least two materials and wherein the formation of at least some layers including operations for providing coatings of dielectric material that isolate at least-portions of a first conductive material from (1) other portions of the first conductive material, (2) a second conductive material, or (3) another dielectric material, and wherein the thickness of the dielectric coatings are thin compared to the thicknesses of the layers used in forming the structures. In some preferred embodiments, portions of each individual layer are encapsulated by dielectric material while in other embodiments only boundaries between distinct regions of materials are isolated from one another by dielectric barriers.