Fabrication

About: Fabrication is a research topic. Over the lifetime, 20475 publications have been published within this topic receiving 235676 citations.

An ‘aqueous route’ for the fabrication of low-temperature-processable oxide flexible transparent thin-film transistors on plastic substrates

Abstract: Metal oxide semiconductor structures can be both electrically conductive and optically transparent — an attractive combination for electronic devices. Their fabrication has typically involved the deposition of the precursors under vacuum, a method that is costly and can result in materials lacking uniformity over large surface areas. A team of researchers led by Byeong-Soo Bae at the Korea Advanced Institute of Science and Technology has alleviated these issues by devising a low-temperature fabrication route in aqueous media. Solution-based processes had been investigated, but often involved alcohol solvents that require high processing temperatures or complex and unstable precursors. An indium oxide thin film has now been prepared from an aqueous solution, at temperatures lower than 200 °C, that further served as the active layer of a fully transparent thin-film transistor. In addition, using plastic as a substrate enabled the construction of a transparent, flexible device.

Narrow-band waveguide Bragg gratings on SOI wafers with CMOS-compatible fabrication process.

Abstract: We demonstrate the design, fabrication and measurement of integrated Bragg gratings in a compact single-mode silicon-on-insulator ridge waveguide. The gratings are realized by corrugating the sidewalls of the waveguide, either on the ridge or on the slab. The coupling coefficient is varied by changing the corrugation width which allows precise control of the bandwidth and has a high fabrication tolerance. The grating devices are fabricated using a CMOS-compatible process with 193 nm deep ultraviolet lithography. Spectral measurements show bandwidths as narrow as 0.4 nm, which are promising for on-chip applications that require narrow bandwidths such as WDM channel filters. We also present the die-to-die nonuniformity for the grating devices on the wafer, and our analysis shows that the Bragg wavelength deviation is mainly caused by the wafer thickness variation.

Sol-gel derived microstructured fiber: fabrication and characterization

Abstract: We discuss a sol-gel casting technique for fabricating microstructured optical fiber. Both the advantages and challenges associated with this fabrication method are outlined.

Bottom-up synthesis of high surface area mesoporous crystalline silicon and evaluation of its hydrogen evolution performance

Abstract: Porous silicon is a technologically important material; however, many top-down etching fabrication processes result in significant material wastage. Here, the authors report a bottom-up self-templating fabrication route and assess the hydrogen evolution performance of the resulting material.