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World’s Smallest QR Code, Guinness Record
Researchers from TU Wien and start up Cerabyte created the world’s smallest QR code and earned a Guinness World Records title. The development demonstrates a method of ultra dense ceramic based data storage.
QR Code and Ultra Dense Data Storage:
| Dimension | Key Details |
|---|---|
| QR Code | Two dimensional barcode that stores information as pixels arranged in a square shaped grid and can be scanned by digital devices. |
| Types of QR Codes | Includes Micro QR Code, Model 1 QR Code, Model 2 QR Code, iQR Code, SQRC Secure QR Code and Frame QR Code. |
| Micro QR Code | Smaller version used where space is limited with minimum size of 11 by 11 modules and storage up to 21 characters. |
| Model 1 QR Code | Early prototype version capable of storing up to 1167 numeric characters. |
| Model 2 QR Code | Improved and most widely used version with higher capacity storing up to 7089 numbers in Version 40. |
| iQR Code | Provides square or rectangular format useful when space or shape constraints exist. |
| SQRC | Provides restricted access feature for storing private or confidential information. |
| Frame QR Code | Provides customizable frame allowing images logos or illustrations along with encoded data. |
| Common Uses | Includes applications in supply chain management digital payments and cryptocurrency wallet addresses. |
| World’s Smallest QR Code | Measures about 2 square micrometres which is smaller than a bacterium. |
| Grid Structure | Comprises a grid of 29 by 29 pixels with each pixel measuring about 49 nanometres. |
| Material Used | Chromium nitride ceramic coating of about 15 nanometres thickness. |
| Fabrication Technique | Focused Ion Beam milling used for atom level carving. |
| Verification Method | Scanning Electron Microscope used to verify the structure. |
| Ceramic Based Data Storage | Provides heat resistant corrosion resistant chemically inert medium where data is physically etched without need for power. |
| Storage Capacity | An A4 sized ceramic sheet provides storage exceeding 2 terabytes of data. |
| Information Density | Provides information density of about 130 bits per square micrometre. |