摘要:
A process for forming sidewalls for use in the fabrication of semiconductor structures, where the thin, vertical sidewalls are "image transferred" to define sub-micron lateral dimensions.First, a patterned resist profile with substantially vertical edges is formed on a substrate on which the sidewalls are to be created. Then, the profile is soaked in a reactive organometallic silylation agent to silylate the top and the vertical edges of the resist to a predetermined depth, thereby rendering the profile surfaces highly oxygen etch resistant. In a subsequent anisotropic RIE process, the horizontal surfaces of the silylated profile and the unsilylated resist are removed, leaving the silylated vertical edges, that provide the desired free-standing sidewalls, essentially unaffected.
摘要:
A method, and device produced therewith, for improving the planarity of etched mirror facets 18 of integrated optic structures with non-planar stripe waveguides, such as ridge or groove diode lasers or passive devices such as modulators and switches. The curvature of the mirror facet surface at the edges of the waveguide due to topographical, lithographical and etch process effects, causes detrimental phase distortions, and is avoided by widening the waveguide end near the mirror surface thereby shifting the curved facet regions away from the light mode region to surface regions where curvature is not critical.
摘要:
A method of passivating etched mirror facets of semiconductor laser diodes which enhances device reliability.The etched mirror facet is first subjected to a weet-etch process to substantially remove any native oxide as well as any surface layer which may have been mechanically damaged during the preceding mirror etch process. Then, a passivation pre-treatment is applied whereby any residual oxygen is removed and a sub-monolayer is formed which permanently reduces the non-radiative recombination of minority carriers at the mirror facet. Finally, the pre-treated mirror surface is coated with a passivation layer to avoid any environmental effect on the mirror.
摘要:
A method, and device produced therewith, for improving the planarity of etched mirror facets 18 of integrated optic structures with non-planar stripe waveguides, such as ridge or groove diode lasers or passive devices such as modulators and switches. The curvature of the mirror facet surface at the edges of the waveguide due to topographical, lithographical and etch process effects, causes detrimental phase distortions, and is avoided by widening the waveguide end near the mirror surface thereby shifting the curved facet regions away from the light mode region to surface regions where curvature is not critical.
摘要:
Process for producing temperature-stable undercut profiles for use in semiconductor fabrication. The process is based on the phenomenon of high etch-rate selectivity between RF- and LF- PECVD-grown silicon nitride films (12G and 13G, respectively) that are deposited on top of each other. By choosing proper film and process parameters, these PECVD nitride structures can be made stress-free: the tensile stress of the RF film (12G) compensates the compressive stress of the LF film (13G).Also disclosed is an application of a T-shaped structure (15), produced with the new process, in a method for fabricating fully self-aligned "dummy" gate sub-micron MESFETs.
摘要:
Deflection of a free end of one plate-like member, that is caused by uniform stress, is transmitted to the other plate-like member by moving a free end of the other plate-like member. According to this configuration, the uniform stress applied to the one plate-like member is converted into stress induced by a point force in the other plate-like member, and then, the induced stress is concentrated on a fixed end side narrow portion in which a piezoresistor is provided. Thus, a novel structure for a piezoresistive surface stress sensor having high sensitivity to uniform stress applied to the surface of the sensor is provided.
摘要:
Provides semiconductor devices and method for fabricating devices having a high thermal dissipation efficiency. An example device comprises a thermally conducting structure attached to a surface of the semiconductor device via soldering. The thermally conducting structure is essentially formed of a thermally conducting material and comprises an array of freestanding fins, studs or frames, or a grid of connected fins. A process for fabricating such a semiconductor device includes forming a thermally conducting structure on a carrier and attaching the thermally conducting structure formed on the carrier to a surface of the semiconductor device via soldering.
摘要:
A method for writing data to and/or reading data from locations on a surface via a tip comprises moving the tip between the locations on the surface. At each location, energy is selectively applied to the surface via the tip and the tip and the surface are selectively forced together in synchronization with the application of energy.
摘要:
In accordance with the present invention, there is provided an apparatus comprising a tape having an information layer on which information is storable in the form of perturbations, an array of probes that in function faces the tape such that the probes scan the surface of the tape, means for selectively forming the perturbations via the probes, means for detecting the presence of the perturbations via the probes, and drive means for moving the tape relative to the array of probes. The apparatus allows to store high data capacities at a small form factor.
摘要:
An apparatus and method for moving a first object relative to a second object is provided. One of the first and second objects is moved and thereby guided by a tracking device. The tracking device uses a pattern on the first object and/or second object and a releasable clamping device for holding the first and second object in contact. The first and second object can then be releasably clamped such that the patterns match and the clamping device holds the first and second object in a position defined by the pattern. This invention is particularly well suited for nanomechanical or micromechanical applications.