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Related Concept Videos

P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity arises...
Non-ohmic Devices00:51

Non-ohmic Devices

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 diode...
Electrical Current01:10

Electrical Current

Electrical current is defined as the rate at which charge flows. When there is a large current present, such as that used to run a refrigerator, a large amount of charge moves through the wire in a small amount of time. If the current is small, such as that used to operate a handheld calculator, a small amount of charge moves through the circuit over a long period of time. The SI unit for current is the ampere (A), named for the French physicist André-Marie Ampère (1775–1836). An ampere is the...
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...

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Related Experiment Video

Updated: May 29, 2026

In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices
09:26

In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices

Published on: June 26, 2015

Electrical Physically Unclonable Function via Stochastic-Defect-Driven Invisible Current Pathways.

Changgyun Moon1, Seonghoon Jeong1, Joo-On Oh1

  • 1School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea.

ACS Applied Materials & Interfaces
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel breakdown (B.D.) fingerprint for secure authentication, offering a robust and lightweight Physically Unclonable Function (PUF) solution without error correction. The B.D. fingerprint leverages intrinsic device randomness for reliable, high-entropy security codes.

Keywords:
authenticationdielectric breakdownelectrical PUFhardware-security

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Computer Science

Background:

  • Physically Unclonable Functions (PUFs) are crucial for secure authentication in resource-constrained environments like IoT.
  • Existing PUF solutions often rely on helper data and error-correction systems to ensure stability.
  • Limited intrinsic stability of device fingerprints necessitates complex compensation mechanisms.

Purpose of the Study:

  • To introduce a novel breakdown (B.D.) fingerprint as a robust and lightweight PUF platform.
  • To demonstrate a PUF that operates without helper data or error-correction systems.
  • To leverage intrinsic variations in amorphous HfO2 for reliable security key generation.

Main Methods:

  • Utilized Atomic Layer Deposition (ALD) to grow uniform amorphous HfO2 films.
  • Developed a tailored key-generation scheme to binarize subtle insulation variations via breakdown.
  • Analyzed intra/interdevice Hamming distances (HD) and correlation coefficients for entropy verification.
  • Evaluated electrical retention and thermal stability from +20 to 150 °C.

Main Results:

  • Achieved a perfectly balanced bit uniformity of 0.5 through the breakdown process.
  • Demonstrated convergence of intra/interdevice Hamming distances to 0 and 0.5, respectively.
  • Verified high entropy of the generated security code via correlation-coefficient analysis.
  • Confirmed excellent electrical retention and thermal stability across a wide temperature range.

Conclusions:

  • The proposed B.D. fingerprint offers a robust and lightweight PUF solution.
  • The platform operates reliably without error-correction mechanisms.
  • The B.D. fingerprint provides a broad authentication window with stable performance under various conditions.