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26 Feb 2001

Volume 78, Issue 9, pp. 1171-1311

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Atomic force microscope cantilevers for combined thermomechanical data writing and reading

William P. King, Thomas W. Kenny, Kenneth E. Goodson, Graham Cross, Michel Despont, Urs Dürig, Hugo Rothuizen, Gerd K. Binnig, and Peter Vettiger

Appl. Phys. Lett. 78, 1300 (2001); http://dx.doi.org/10.1063/1.1351846 (3 pages) | Cited 73 times

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Heat conduction governs the ultimate writing and reading capabilities of a thermomechanical data storage device. This work investigates transient heat conduction in a resistively heated atomic force microscope cantilever through measurement and simulation of cantilever thermal and electrical behavior. The time required to heat a single cantilever to bit-writing temperature is near 1 μs and the thermal data reading sensitivity ΔR/R is near 1×10−4 per vertical nm. Finite-difference thermal and electrical simulation results compare well with electrical measurements during writing and reading, indicating design tradeoffs in power requirements, data writing speed, and data reading sensitivity. We present a design for a proposed cantilever that is predicted to be faster and more sensitive than the present cantilever. © 2001 American Institute of Physics.
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68.37.Ps Atomic force microscopy (AFM)
02.70.Bf Finite-difference methods

III-nitride blue microdisplays

H. X. Jiang, S. X. Jin, J. Li, J. Shakya, and J. Y. Lin

Appl. Phys. Lett. 78, 1303 (2001); http://dx.doi.org/10.1063/1.1351521 (3 pages) | Cited 65 times

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Prototype blue microdisplays have been fabricated from InGaN/GaN quantum wells. The device has a dimension of 0.5×0.5 mm2 and consists of 10×10 pixels 12 μm in diameter. Emission properties such as electroluminescence spectra, output power versus forward current (L–I) characteristic, viewing angle, and uniformity have been measured. Due to the unique properties of III-nitride wide-band-gap semiconductors, microdisplays fabricated from III nitrides can potentially provide unsurpassed performance, including high-brightness/resolution/contrast, high-temperature/high-power operation, high shock resistance, wide viewing angles, full-color spectrum capability, long life, high speed, and low-power consumption, thus providing an enhancement and benefit to the present capabilities of miniature display systems. © 2001 American Institute of Physics.
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85.60.Pg Display systems
85.35.Be Quantum well devices (quantum dots, quantum wires, etc.)
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