Entries with tag cornell university.

Scientists Produce First Consumer-Electronic Device Made Completely by a 3D Printer

Cornell University researchers say they have created the first consumer electronic device—a working loudspeaker—produced entirely by a 3D printer. They made the speaker with a customizable research printer in a university lab, using silver ink to make the conductor and strontium ferrite for the speaker’s magnet. The challenge, the researchers note, was finding materials that could successfully be fabricated together, at the same time since the materials need different temperatures for printing and have different curing times. To demonstrate their speaker, they played a clip from US President Barack Obama’s 2013 State of the Union speech in which he mentioned 3D printing. (United Press International)(Cornell Chronicle)

UCLA Researchers Make New Material for High-Performance Supercapacitors

University of California, Los Angeles scientists have created a material they say could be used to create powerful supercapacitors. The material, a synthesized form of niobium oxide, could be used to rapidly store and release energy. The technology could be used to rapidly charge many devices, including mobile electronics and industrial equipment. The scientists have developed electrodes using the material, but must undertake more research to create entire quick-charging devices. Cornell University and the Université Paul Sabatier researchers contributed to the work, which was published in the journal Nature Materials. (EurekAlert)(University of California Los Angeles)(Nature Materials)
 

New Approach Promises to Improve Semiconductor Lithography


Cornell University researchers have developed a new method for annealing that could improve the semiconductor-lithography process by making the process faster and improving the quality of the resulting circuit feature images. Their laser-based method is used to anneal thin photoresist films, which helps transfer semiconductor patterns onto silicon wafers in the manufacturing of integrated circuits. In the lithographic process, annealing helps the resist adhere to the substrate and is the step completed before etching.  Known as laser-spike annealing, the Cornell method uses a focused, continuous laser wave that scans the silicon substrate and reaches melting temperatures in milliseconds, eliminating the line roughness common in conventional methods such as hotplate baking. The Cornell researchers say their approach is much better than the hotplate-baking annealing process, in which prolonged heating can degrade feature-image quality. (PhysOrg)(EE Times)(Semiconductor Research Corp.)

Scientists Develop GPS-Spoofing Countermeasures

Cornell University researchers have demonstrated countermeasures designed to protect GPS-based devices from spoofing that could give hackers control of the systems. In a display that the US Department of Homeland Security sponsored, the scientists showed how GPS spoofing would work on a mini-helicopter and how they could prevent it. In a spoofing attack, which the researchers say is a growing threat, false GPS signals are transmitted to a device. The target receives them as authentic, enabling the hackers to gain control of the device. The scientists showed how they could detect and then counteract the spoofing.  They plan to patent their approach. (PhysOrg)(Cornell University)

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