Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Tiniest secrets of integrated circuits revealed with new imaging technique

Abstract:
The life-givers of integrated circuits and quantum devices in silicon are small structures made from patches of foreign atoms called dopants. The dopant structures provide charge carriers that flow through the components of the circuit, giving the components their ability to function. These days the dopant structures are only a few atoms across and so need to be made in precise locations within a circuit and have very well-defined electrical properties. At present manufacturers find it hard to tell in a non-destructive way whether they have made their devices according to these strict requirements. A new imaging paradigm promises to change all that.

Tiniest secrets of integrated circuits revealed with new imaging technique

London, UK | Posted on August 5th, 2020

The imaging mode called broadband electric force microscopy, developed by Dr Georg Gramse at Keysight technologies & JKU uses a very sharp probe that sends electromagnetic waves into a silicon chip, to image and localize dopant structures underneath the surface. Dr Gramse says that because the microscope can use waves with many frequencies it can provide a wealth of previously inaccessible detail about the electrical environment around the dopant structures. The extra information is crucial to predicting how well the devices will ultimately perform.

The imaging approach was tested on two tiny dopant structures made with a templating process which is unique in achieving atomically sharp interfaces between differently doped regions. Dr Tomas Skeren at IBM produced the world's first electronic diode (a circuit component which passes current in only one direction) fabricated with this templating process, while Dr Alex Kölker at UCL created a multilevel 3-D device with atomic scale precision.

The results, published in the journal Nature Electronics, demonstrate that the technique can take pictures and resolve as few as 200 dopant atoms even if they are hidden below the same number of Si atoms. It can tell the difference between certain flavours of dopant atoms, and can also provide information about the way charge carriers move through the structures and about atomic-sized 'traps' that can stop them from moving.

Professor Neil Curson, who leads the group at UCL, said: "This research could not have come at a better time for the massive world-wide effort to make smaller electronics or quantum computers in silicon. While the success in making components smaller and more complicated has been spectacular, the technology required to actually observe what is being made has not been keeping up. This has become a major problem for quality control in silicon chip manufacture and for information security, when you can't see what's inside the chips you are making or buying. Our new research will help solve many of these issues."

Dr Andreas Fuhrer from IBM Research, added: "After learning to make the first tiny dopant device structures consisting of two different dopant species, boron and phosphorous, it was extremely useful to work with this international team to discover subtle details about our structures that would just not be possible in any other way."

####

For more information, please click here

Contacts:
Rebecca Caygill

020-310-83846

@uclnews

Copyright © University College London

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE"

Related News Press

News and information

Graphene key for novel hardware security May 10th, 2021

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Imaging

World's first fiber-optic ultrasonic imaging probe for future nanoscale disease diagnostics April 30th, 2021

New Cypher VRS1250 Video-Rate Atomic Force Microscope Enables True Video-Rate Imaging at up to 45 Frames per Second April 30th, 2021

Researchers realize high-efficiency frequency conversion on integrated photonic chip April 23rd, 2021

An easy-to-use platform is a gateway to AI in microscopy April 23rd, 2021

Possible Futures

Graphene key for novel hardware security May 10th, 2021

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Chip Technology

A silver lining for extreme electronics April 30th, 2021

New brain-like computing device simulates human learning: Researchers conditioned device to learn by association, like Pavlov's dog April 30th, 2021

GLOBALFOUNDRIES Moves Corporate Headquarters to its Most Advanced Semiconductor Manufacturing Facility in New York April 27th, 2021

Researchers realize high-efficiency frequency conversion on integrated photonic chip April 23rd, 2021

Discoveries

Graphene key for novel hardware security May 10th, 2021

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Announcements

Graphene key for novel hardware security May 10th, 2021

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Graphene key for novel hardware security May 10th, 2021

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Tools

World's first fiber-optic ultrasonic imaging probe for future nanoscale disease diagnostics April 30th, 2021

New Cypher VRS1250 Video-Rate Atomic Force Microscope Enables True Video-Rate Imaging at up to 45 Frames per Second April 30th, 2021

Researchers realize high-efficiency frequency conversion on integrated photonic chip April 23rd, 2021

An easy-to-use platform is a gateway to AI in microscopy April 23rd, 2021

Quantum nanoscience

Quantum steering for more precise measurements April 23rd, 2021

Shedding light on perovskite films: Efficient materials for future solar cells - New model to determine photoluminescence quantum efficiency March 16th, 2021

Scientists build the smallest cable containing a spin switch March 12th, 2021

Bringing Atoms to a Standstill: NIST Miniaturizes Laser Cooling January January 21st, 2021

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project