Abstract:
The invention relates to a method for producing a component with a first face of a plate-shaped structure (2) involving the following steps: engraving a second face of the structure, which is opposite the first face, on a portion of its surface in order to define an area of reduced thickness (22), and; inclining the area of reduced thickness (22) with regard said structure (2). A composite of this type has a recess between the plate-shaped structure and the inclined area of reduced thickness. The inclined area can thus support active elements (10, 12) that function according to a direction defined by the inclination.
Abstract:
The present invention relates to a method for the production of very small trenches in semiconductor devices. The formation of these small trenches is based on chemically changing the properties of a first dielectric layer locally, such that the side walls of a patterned hole in said first dielectric layer are converted locally and become etchable by a first etching substance. Subsequently a second dielectric material is deposited in the patterned structure and the damaged part of the first dielectric material is removed such that small trenches are obtained. The small trenches obtained by chemically changing the properties of a dielectric layer can be used as test vehicle to study barrier deposition, copper plating and seedlayer deposition within very small trenches (order 10-30 nm).
Abstract:
A method for fabrication of microscopic structures that uses a beam process, such as beam-induced decomposition of a precursor, to deposit a mask in a precise pattern and then a selective, plasma beam is applied, comprising the steps of first creating a protective mask upon surface portions of a substrate using a beam process such as an electron beam, focused ion beam (FIB), or laser process, and secondly etching unmasked substrate portions using a selective plasma beam etch process. Optionally, a third step comprising the removal of the protective mask may be performed with a second, materially oppositely selective plasma beam process.
Abstract:
The present invention provides a method for establishing endpoint during an alternating cyclical etch process or time division multiplexed process. A substrate is placed within a plasma chamber and subjected to an alternating cyclical process having an etching step and a deposition step. A variation in plasma emission intensity is monitored using known optical emission spectrometry techniques. An amplitude information is extracted from a complex waveform of the plasma emission intensity using an envelope follower algorithm. The alternating cyclical process is discontinued when endpoint is reached at a time that is based on the monitoring step.
Abstract:
A method for manufacturing a package which includes: an etching step of etching a silicon substrate (101; 201), and forming a via hole (103, 106; 203, 203A, 207) penetrating through the silicon substrate; and a step of embedding an electrically conductive material in the via hole (106; 207), and forming a viaplug (107; 208), characterized in that the etching step includes a first etching step of forming the via hole in a straight shape, and a second etching step of forming the via hole in a taper shape.
Abstract:
A technique (500) for manufacturing a micro-electro-mechanical (MEM) structure includes a number of steps. Initially, a substrate is provided (502). Next, a plurality of trenches are etched into the substrate with a first etch (508). Then, a charging layer is formed at a bottom of each of the trenches to form undercut trenches (510). Finally, a second etch is provided into the undercut trenches. The charging layer causes the second etch to laterally etch foots in the substrate between the undercut trenches (512). The footers undercut the substrate to release a portion of the substrate for providing a movable structure between the undercut trenches and above the footers.
Abstract:
A process for making a microelectromechanical device having a moveable component defined by a gap pattern in a semiconductor layer of a silicon-on-insulator wafer (10) involves the use of a plurality of deep reactive ion etching steps at various etch depths that are used to allow a buried oxide layer (14) of the silicon-on-insulator wafer (10) to be exposed in selected areas before the entire moveable component of the resulting device is freed for movement. This method allows wet release techniques to be used to remove the buried oxide layer (14) without developing stiction problems. This is achieved by utilizing deep reactive ion etching to free the moveable component after a selected portion of the buried oxide layer (14) has been removed by wet etching.
Abstract:
A method of manufacturing an external force detection sensor in which a sensor element is formed by through-hole (20) dry etching of an element substrate (3), and an electrically conductive material is used as an etching stop layer (18) during the dry etching.
Abstract:
The present invention provides merged-mask processes for fabricating micromachined devices in general and mirrored assemblies for use in optical scanning devices in particular. A method of fabricating a three dimensional structure, comprising, providing a substrate, applying a layer of a first masking material onto the substrate, applying a layer of a second masking material onto the layer of the first masking material, patterning the layer of the second masking material, applying a layer of a third masking material onto the portions not covered by the patterned layer of the second masking material, the layer of the third masking material is at least as thick as the combined thickness of the layers of the first and second masking materials, patterning the layers of the first and third masking materials, etching the exposed portions of the substrate, etching the exposed portions of the layers of the first and third masking materials and etching the exposed portions of the substrate.
Abstract:
The present invention provides merged-mask processes for fabricating micro-machined devices in general and mirrored assemblies for use in optical scanning devices in particular. The process includes (a) providing a substrate having a predetermined thickness; (b) applying a first masking layer on a first portion of the substrate and a second masking layer on a second portion of the substrate, said second masking layer being at least as thick as the first masking layer; (c) etching a portion of the second masking layer to provide a first exposed portion of the substrate; (d) etching the first exposed portion of the substrate to a first depth; (e) etching the second masking layer to provide a second exposed portion of the substrate; and (f) etching simultaneously the first exposed portion of the substrate to a second depth and the second exposed portion of the substrate to a first depth. The process further comprises patterning the first masking layer before applying the second masking layer to provide the second portion of the substrate for etching and etching the first masking layer to expose the second portion of the substrate. The first and second masking layers are applied prior to etching the substrate.