Abstract:
The invention relates to a method of producing a stacked structure. The inventive method comprises the following steps consisting in: a) using a first plate (1) which is, for example, made from silicon, and a second plate (5) which is also, for example, made from silicon, such that at least one of said first (1) and second (5) plates has, at least in part, a surface (2; 7) that cannot bond to the other plate; b) providing a surface layer (3; 8), which is, for example, made from silicon oxide, on at least one part of the surface (2) of the first plate and/or the surface (7) of the second plate (5); and c) bonding the two plates (1; 5) to one another. The aforementioned bonding incompatibility can, for example, result from the physicochemical nature of the surface or of a coating applied thereto, or from a roughness value (r′2, r′7) which is greater than a predetermined threshold. The invention also relates to a stacked structure produced using the inventive method.
Abstract:
A method comprises depositing an organic material on a substrate; depositing additional material different from the organic material after depositing the organic material; and removing the organic material with a compressed fluid. Also disclosed is a method comprising: providing an organic layer on a substrate; after providing the organic layer, providing one or more layers of a material different than the organic material of the organic layer; removing the organic layer with a compressed fluid; and providing an anti-stiction agent with a compressed fluid to material remaining after removal of the organic layer.
Abstract:
The invention relates to measuring devices used for the measuring of acceleration, and specifically to capacitive acceleration sensors. The capacitive acceleration sensor according to the present invention comprises a pair of electrodes composed of a movable electrode (4) and a stationary electrode (5), and, related to the pair of electrodes, an isolator protrusion having a special coating. The invention provides an improved, more durable sensor structure, which withstands wear caused by overload situations better than earlier structures.
Abstract:
A method comprises depositing an organic material on a substrate; depositing additional material different from the organic material after depositing the organic material; and removing the organic material with a compressed fluid. Also disclosed is a method comprising: providing an organic layer on a substrate; after providing the organic layer, providing one or more layers of a material different than the organic material of the organic layer; removing the organic layer with a compressed fluid; and providing an anti-stiction agent with a compressed fluid to material remaining after removal of the organic layer.
Abstract:
Phosphonate surfactants are employed to passivate the surfaces of MEMS devices, such as digital micromirror devices. The surfactants are adsorbed from vapor or solution to form self-assembled monolayers at the device surface. The higher binding energy of the phosphonate end groups (as compared to carboxylate surfactants) improves the thermal stability of the resulting layer.
Abstract:
Organic surfactants are employed to passivate the surfaces of MEMS devices, such as digital micromirrors. The binding of these surfactants to the surface is improved by first associating with the surface transition metal atoms or ions from Groups IVB, VB, and IVB of the periodic table.
Abstract:
A method for altering surfaces of a microstructure is disclosed. The modification comprises cleaning the surfaces using an ozone-containing cleaning agent. The modification may also comprise coating the surfaces of the microstructure using a vapor phase coating agent that reacts chemically with the surface. The modification may also comprise coating the surfaces of the microstructure using a lubricant that interacts physically with the surface. The modification can be performed after removal of sacrificial materials of the microstructure during the fabrication process. In particular, the modification method is applicable during the packaging stage for the microstructure.
Abstract:
The present invention alleviates stiction between a suspended beam or microstructure and an underlying substrate by providing a patterned passivation layer on the substrate underneath the beam. The passivation layer is patterned to provide a substrate surface that differs substantially from the bottom surface of the beam. The difference between these two surfaces reduces the potential contact area between the beam and the substrate when the beam is pulled down, thereby reducing adhesive forces between the beam and the substrate and reducing the likelihood of stiction. In one embodiment, the passivation layer is patterned to form a substrate surface comprising a plurality of protuberances. In another embodiment, the passivation layer is patterned to form a substrate surface having a mesh pattern.
Abstract:
Disclosed herein is a method of improving the adhesion of a hydrophobic self-assembled monolayer (SAM) coating to a surface of a MEMS structure, for the purpose of preventing stiction. The method comprises pretreating surfaces of the MEMS structure with a plasma generated from a source gas comprising oxygen and, optionally, hydrogen. The treatment oxidizes the surfaces, which are then reacted with hydrogen to form bonded OH groups on the surfaces. The hydrogen source may be present as part of the plasma source gas, so that the bonded OH groups are created during treatment of the surfaces with the plasma. Also disclosed herein is an integrated method for release and passivation of MEMS structures.
Abstract:
The invention relates to measuring devices used for the measuring of acceleration, and specifically to capacitive acceleration sensors. The capacitive acceleration sensor according to the present invention comprises a pair of electrodes composed of a movable electrode (4) and a stationary electrode (5), and, related to the pair of electrodes, an isolator protrusion having a special coating. The invention provides an improved, more durable sensor structure, which withstands wear caused by overload situations better than earlier structures.