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First 3D Barcode Eliminates Forgeries

By R&D Editors | September 11, 2015

Plastic prototype pill with indentations of less than 0.5mm, creating a 3D barcode. Image: Ben Whiteside, University of BradfordThe first 3D barcode which can be built into products during manufacture has been developed by Yorkshire engineers.

The anti-counterfeit marker is virtually invisible to the naked eye and impossible to detect by touch. It can be read using a laser scanner, allowing anything from phones to pills to be tracked and verified as authentic.

Made public at the British Science Festival in Bradford, the technology was devised by the UK SME, Sofmat Ltd, and has been developed in collaboration with engineers from the University of Bradford.

The 3D barcode is made up of tiny indentations in the surface of the product, created by pins which are integrated into its mold. Using micro actuators, the pins can be set at different heights, each step corresponding to either a letter (A to Z) or a number (0 to 9). The prototype — developed with funding from Innovate UK — works with a four pin array, enabling over 1.7 million different configurations.

“The system enables very small displacements to be made in each pin – each step being just 0.4microns, 100th of the width of a human hair,” explains Dr. Ben Whiteside, from the University of Bradford. “These have to be set with a very high accuracy and with sufficient force so their position is maintained during the manufacturing process. While our system has been developed initially for products made from plastics or composites through injection molding, it could also be used to stamp or emboss the code onto a product.”

Estimates for the total value of fakes sold worldwide each year reach as high as $1.8 trillion. Most anti-counterfeit devices are stuck onto the product or its packaging after manufacture, making them easy to copy. Because the 3D barcode is an integral part of the product itself it is very difficult to reproduce.

“A 3D barcode allows much more complexity than existing anti-counterfeit systems,” explains Sofmat Director Dr. Phil Harrison. “You can have multiple configurations, different codes on each individual product and additional details such as patterns on the heads of the pins themselves, making copying the code extremely difficult. For the first time the same technology and coding can be used on bulk packaging, individual packaging and on the actual product, making it much harder to create and ship fake products.”

The system has been verified in the laboratory using high-tech scanning devices including a white light interferometer and a laser-scanning confocal microscope to characterize the surface of the coded ‘product’ to ensure the code is accurately reproduced. A laser scanner is currently in development that will be able to read the code and wirelessly transmit the result via an app to either a phone or tablet.

The patented technology is already generating interest from the electronics, automotive and pharmaceutical sectors, where counterfeiting is a serious issue. Many pharma companies are now developing molded tablets, produced using an injection molding process, into which a 3D barcode could be incorporated.

Release Date: September 10, 2015
Source: University of Bradford 

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