Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a hollow structure capable of highly accurately forming an air gap, by using a sacrifice film forming process having a high implantation characteristic in low stress.SOLUTION: The manufacturing method comprises the steps of preparing a lower structure 30 including a recess shape 22, implanting the recess shape by a sacrifice film 40 composed of an organic film on the lower structure by depositing the sacrifice film 40, removing an unnecessary part of the sacrifice film, forming an upper structure 50 on the sacrifice film from which the unnecessary part is removed and forming a void between the lower structure and the upper structure by removing the sacrifice film.
Abstract:
A process for filling one or more etched holes defined in a frontside surface of a wafer substrate. The process includes the steps of: (i) depositing a layer of a thermoplastic first polymer onto the frontside surface and into each hole; (ii) reflowing the first polymer; (iii) exposing the wafer substrate to a controlled oxidative plasma; (iv) optionally repeating steps (i) to (iii); (v) depositing a layer of a photoimageable second polymer; (vi) selectively removing the second polymer from regions outside a periphery of the holes using exposure and development; and (vii) planarizing the frontside surface to provide holes filled with a plug comprising the first and second polymers, which are different than each other. Each plug has a respective upper surface coplanar with the frontside surface.
Abstract:
The invention provides a chemical-mechanical polishing composition containing wet-process silica, an oxidizing agent that oxidizes nickel-phosphorous, a chelating agent, polyvinyl alcohol, and water. The invention also provides a method of chemically-mechanically polishing a substrate, especially a nickel-phosphorous substrate, by contacting a substrate with a polishing pad and the chemical-mechanical polishing composition, moving the polishing pad and the polishing composition relative to the substrate, and abrading at least a portion of the substrate to polish the substrate.
Abstract:
A method of shaping a substrate in one embodiment includes providing a first support layer, providing a first shaping pattern on the first support layer, providing a substrate on the first shaping pattern, performing a first chemical mechanical polishing (CMP) process on the substrate positioned on the first shaping pattern, and removing the once polished substrate from the first shaping pattern.
Abstract:
Electrochemical fabrication methods for forming single and multilayer mesoscale and microscale structures are disclosed which include the use of diamond machining ( e.g. fly cutting or turning) to planarize layers. Some embodiments focus on systems of sacrificial and structural materials which are useful in Electrochemical fabrication and which can be diamond machined with minimal tool wear ( e.g. Ni-P and Cu, Au and Cu, Cu and Sn, Au and Cu, Au and Sn, and Au and Sn-Pb), where the first material or materials are the structural materials and the second is the sacrificial material). Some embodiments focus on methods for reducing tool wear when using diamond machining to planarize structures being electrochemically fabricated using difficult-to-machine materials ( e.g. by depositing difficult to machine material selectively and potentially with little excess plating thickness, and/or pre-machining depositions to within a small increment of desired surface level ( e.g. using lapping or a rough cutting operation) and then using diamond fly cutting to complete the process, and/or forming structures or portions of structures from thin walled regions of hard-to-machine materials as opposed to wide solid regions of structural material.
Abstract:
Method for fabricating ultrathin gaps producing ultrashort standoffs (26) in array structures includes sandwiching a patterned device layer (12) between a silicon standoff layer (26) and a silicon support layer (38), providing that the back surfaces (46, 48) of the respective silicon support layer and the standoff layer are polished to a desired thickness corresponding to the desired standoff height on one side and to at least a minimum height for mechanical strength on the opposing side, as well as to a desired smoothness. Standoffs and mechanical supports are then fabricated by etching to produce voids with the dielectric oxides (20, 40) on both sides of the device layer serving as suitable etch stops. Thereafter, the exposed portions of the oxide layers are removed to release the pattern, and a package layer is mated with the standoff voids to produce a finished device. The standoff layer can be fabricated to counteract curvature.
Abstract:
A method of fabricating a device having a desired non-planar surface or profile and device produced thereby are provided. A silicon wafer is first coated with silicon nitride, patterned, and DRIE to obtain the desired etch profile. Silicon pillars between trenches are then etched using an isotropic wet etch, resulting in a curved well. The wafer is then oxidized to ∼2 µm to smooth the surface of the well, and to protect the well from an ensuring planarization process. The nitride is then selectively removed, and the wafer surface is planarized by removing the Si left in the field regions using either a maskless DRIE or CMP. Finally, the oxide is etched away to produce a wafer with a curved surface.