tag: TMDs

Research Bits: May 10
By Jesse Allen - 10 May, 2023 - Comments: 0

Growing 2D TMDs on chips Researchers from Massachusetts Institute of Technology (MIT), Oak Ridge National Laboratory, and Ericsson Research found a way to “grow” layers of 2D transition metal dichalcogenide (TMD) materials directly on top of a fully fabricated silicon chip, a technique they say could enable denser integrations. The researchers focused on molybdenum disulfide, which is f... » read more

Reducing Contact Resistance in Developing Transistors Based On 2D Materials
By Technical Paper Link - 10 Mar, 2023 - Comments: 0

A new technical paper titled "WS2 Transistors with Sulfur Atoms Being Replaced at the Interface: First-Principles Quantum-Transport Study" was published by researchers at National Yang Ming Chiao Tung University. Abstract "Reducing the contact resistance is one of the major challenges in developing transistors based on two-dimensional materials. In this study, we perform first-principles ... » read more

2D Semiconductor Materials Creep Toward Manufacturing
By Katherine Derbyshire - 16 Feb, 2023 - Comments: 0

As transistors scale down, they need thinner channels to achieve adequate channel control. In silicon, though, surface roughness scattering degrades mobility, limiting the ultimate channel thickness to about 3nm. Two-dimensional transition metal dichalcogenides (TMDs), such as MoS2 and WSe2, are attractive in part because they avoid this limitation. With no out-of-plane dangling bonds and at... » read more

New Materials Open Door To New Devices
By Katherine Derbyshire - 21 Jul, 2022 - Comments: 0

Integrating 2D materials into conventional semiconductor manufacturing processes may be one of the more radical changes in the chip industry’s history. While there is pain and suffering associated with the introduction of any new materials in semiconductor manufacturing, transition metal dichalcogenides (TMDs) support a variety of new device concepts, including BEOL transistors and single-... » read more

Week In Review: Manufacturing, Test
By Ed Sperling - 17 Jun, 2022 - Comments: 0

Node scaling wars are revving up, although much of the action is happening where most people can't see it — inside of research labs. This is difficult stuff, which makes delivery dates difficult to pinpoint, and no one wants to give away their competitive position or commit to a timeline they can't keep. Billions of dollars of leading-edge research — funded by pure-play foundry TSMC, IDM... » read more

Interfacial ferroelectricity in marginally twisted 2D semiconductors
By Technical Paper Link - 08 Mar, 2022 - Comments: 0

Abstract "Twisted heterostructures of two-dimensional crystals offer almost unlimited scope for the design of new metamaterials. Here we demonstrate a room temperature ferroelectric semiconductor that is assembled using mono- or few-layer MoS2. These van der Waals heterostructures feature broken inversion symmetry, which, together with the asymmetry of atomic arrangement at the interface of tw... » read more

2D Semiconductors Make Progress, But Slowly
By Katherine Derbyshire - 28 Feb, 2022 - Comments: 2

Researchers are looking at a variety of new materials at future nodes, but progress remains slow. In recent years, 2D semiconductors have emerged as a leading potential solution to the problem of channel control in highly scaled transistors. As devices shrink, the channel thickness should shrink proportionally. Otherwise, the gate capacitance won’t be large enough to control the flow of cu... » read more

Thinner Channels With 2D Semiconductors
By Katherine Derbyshire - 21 Jun, 2021 - Comments: 0

Moving to future nodes will require more than just smaller features. At 3/2nm and beyond, new materials are likely to be added, but which ones and exactly when will depend upon an explosion of material science research underway at universities and companies around the globe. With field-effect transistors, a voltage applied to the gate creates an electric field in the channel, bending the ban... » read more

Making Silicon Photonics Chips More Reliable
By Ed Sperling - 09 Jun, 2020 - Comments: 0

Silicon photonics has the ability to dramatically improve on-die and chip-to-chip communication within a package at extremely low power, but ensuring that signal integrity remains consistent over time isn't so simple. While this technology has been used commercially for at least the past decade, it never has achieved mainstream status. That's mostly due to the fact that Moore's Law scaling h... » read more

The Good And Bad Of 2D Materials
By Katherine Derbyshire - 27 Feb, 2019 - Comments: 0

Despite years of warnings about reaching the limits of silicon, particularly at leading-edge process nodes where electron mobility is limited, there still is no obvious replacement. Silicon’s decades-long dominance of the integrated circuit industry is only partly due to the material’s electronic properties. Germanium, gallium arsenide, and many other semiconductors offer superior mobili... » read more

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