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Related Concept Videos

Semiconductors01:22

Semiconductors

1.6K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.6K
Types of Semiconductors01:20

Types of Semiconductors

1.5K
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
1.5K
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

1.1K
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
1.1K
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

865
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
865
Non-ohmic Devices00:51

Non-ohmic Devices

1.5K
In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
1.5K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

681
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
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Related Experiment Video

Updated: Feb 19, 2026

The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors
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Advances and Future Challenges in Monolithic 3D Integrated Logic, Power, and Optoelectronics Technologies for Tightly

Haksoon Jung1, Joonghoon Choi2, Seunghun Baek3

  • 1Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea.

ACS Nano
|February 18, 2026
PubMed
Summary

High-performance computing requires advanced integration. Monolithic 3D integration with 2D materials and photonic interconnects offer solutions for next-generation AI hardware, addressing bandwidth and thermal challenges.

Keywords:
2D materialsadvanced packagingcopackaged opticsdesign-technology co-optimizationheterogeneously integrated monolithic 3Dmicrolight-emitting diodesoptical interconnectsphotonic integrated circuitspower delivery networkthermal management

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Computer Engineering

Background:

  • Artificial intelligence hardware demands high-performance heterogeneous integration.
  • Maximizing computational capability requires high data bandwidth via advanced interconnects.
  • Monolithic 3D (M3D) integration with 2D materials offers dense vertical stacking for logic and memory.

Purpose of the Study:

  • To review the convergence of M3D integration, 2D materials, and photonic interconnects for next-generation computing.
  • To highlight challenges in material compatibility, process scalability, and system-level codesign.
  • To outline a unified framework for future computing and communication systems.

Main Methods:

  • Review of current research in M3D integration and 2D materials.
  • Analysis of photonic integrated circuits for low-latency, energy-efficient communication.
  • Discussion of emerging concepts like tunable photodetectors and stacked transceivers.

Main Results:

  • M3D integration enables compact vertical stacking with ultradense intertier vias.
  • Photonic integrated circuits overcome electrical bandwidth limitations for longer communication distances.
  • Emerging photonic concepts enhance scalability by reducing reliance on external lasers.

Conclusions:

  • Addressing thermal management through electro-thermal analysis and codesign is critical for M3D architectures.
  • The integration of M3D, 2D materials, and photonics presents a path beyond conventional silicon scaling.
  • Overcoming material compatibility, scalability, and codesign challenges is essential for realizing next-generation systems.