Dr Hassan Hirshy

2019

• Alt, A. et al. 2019. Analysis of gain variation with changing supply voltages in GaN HEMTs for envelope tracking power amplifiers. IEEE Transactions on Microwave Theory and Techniques 67(7), pp. 2495-2504. (10.1109/TMTT.2019.2916404)
• Chandrasekar, H. et al. 2019. Quantifying temperature-dependent substrate loss in GaN-on-Si RF technology. IEEE Transactions on Electron Devices 66(4), pp. 1681-1687. (10.1109/TED.2019.2896156)

2018

• Hirshy, H. et al. 2018. Evaluation of pulsed I-V analysis as validation tool of nonlinear RF models of GaN-based HFETs. IEEE Transactions on Electron Devices 65(12), pp. 5307-5313. (10.1109/TED.2018.2872513)
• Chandrasekar, H. et al. 2018. Buffer-induced current collapse in GaN HEMTs on highly resistive Si substrates. IEEE Electron Device Letters 39(10), pp. 1556-1559. (10.1109/LED.2018.2864562)

2017

• Pooth, A. et al. 2017. Morphological and electrical comparison of Ti and Ta based ohmic contacts for AlGaN/GaN-on-SiC HFETs. Microelectronics Reliability 68, pp. 2-4. (10.1016/j.microrel.2016.11.002)

2015

• Gold, H. et al. 2015. Self-aligned flexible organic thin-film transistors with gates patterned by nano-imprint lithography. Organic Electronics 22, pp. 140-146. (10.1016/j.orgel.2015.03.047)

2014

• Ulmeanu, M., Petkov, P. V., Hirshy, H. and Brousseau, E. B. J. P. 2014. Formation of ordered arrays of Si and GaAs nanostructures by single-shot laser irradiation in near-field at the solid/liquid interface. Materials Research Express 1(1), article number: 15030. (10.1088/2053-1591/1/1/015030)
• Bigot, S. et al. 2014. Micro and nano structuring of sapphire for Micro Injection process investigation. Presented at: 9th International Conference on Micromanufacturing, Singapore, China, 25-28 March 2014.
• Hirshy, H., Scholz, S. G., Jourlin, Y., Tonchev, S., Reynaud, S., Boukenter, A. and Parriaux, O. 2014. 2N Period submicron grating at the inner wall of a metal cylinder. Microsystem Technologies 20(10-11), pp. 1833-1837. (10.1007/s00542-013-1949-y)

2013

• Zanella, F. et al. 2013. Design and modeling of self-aligned nano-imprinted sub-micrometer pentacene-based organic thin-film transistors. Organic Electronics 14(11), pp. 2756-2761. (10.1016/j.orgel.2013.07.035)
• Griffiths, C. A., Dimov, S. S., Rees, A., Dellea, O., Gavillet, J., Lacan, F. A. and Hirshy, H. 2013. A novel texturing of micro injection moulding tools by applying an amorphous hydrogenated carbon coating. Surface and Coatings Technology 235, pp. 1-9. (10.1016/j.surfcoat.2013.07.006)
• Hashoosh, A., Hirshy, H., Brousseau, E. B. J. P. and Moosa, A. 2013. Fabrication of aluminium nanowires by differential pressure injection. ISRN Nanomaterials 2013, article number: 132798. (10.1155/2013/132798)
• Omar, F., Kolew, A., Brousseau, E. B. J. P. and Hirshy, H. 2013. Simulation and experimental study of the effects of process factors on the uniformity of the residual layer thickness in hot embossing. Journal of Micro and Nano-Manufacturing 1(2), article number: 21002. (10.1115/1.4024097)

2012

• Vella, P. C. et al. 2012. Bulk Metallic Glass based Tool-Making Process Chain for Micro- and Nano- Replication. Presented at: 4M 2012 - 9th International Conference on Multi-Material Micro Manufacture, Vienna, Austria, 9–11 October 2012 Presented at Noll, H., Adamovic, N. and Dimov, S. S. eds.Proceedings of the 9th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing pp. 309., (10.3850/978-981-07-3353-7_300)
• Popov, K. B., Hirshy, H. and Petkov, P. V. 2012. A Novel Approach for Size Up-Scaling of Nickel Master for the Replication of Micro and Nano Features. Presented at: 4M 2012 - 9th International Conference on Multi-Material Micro Manufacture, Vienna, Austria, 9–11 October 2012 Presented at Noll, H., Adamovic, N. and Dimov, S. S. eds.Proceedings of the 9th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing pp. 73., (10.3850/978-981-07-3353-7_280)
• Omar, F., Kolew, A., Brousseau, E. B. J. P. and Hirshy, H. 2012. Process factors influence on residual layer uniformity in hot embossing. Presented at: 9th International Conference on Multi-Material Micro Manufacture, Vienna, Austria, 9-11 October 2012 Presented at Noll, H., Adamovic, N. and Dimov, S. eds.Multi-Material Micro Manufacture Proceedings of the 9th International Conference on. Singapore: Research Publishing pp. 81-84., (10.3850/978-981-07-3353-7_302)

2011

• Hirshy, H., Lalev, G. M., Velkova, V., Popov, K. B., Scholz, S. G. and Dimov, S. S. 2011. Master tool fabrication for the replication of micro and nano features. Presented at: 8th International Conference on Multi-Material Micro Manufacture, Suttgart, Germany, 8–10 November 2011 Presented at Kück, H., Reinecke, H. and Dimov, S. S. eds.Proceedings of the 8th International Conference on Multi-Material Micro Manufacture, Suttgart, Germany, 8–10 November 2011. Singapore: Research Publishing pp. 317-320., (10.3850/978-981-07-0319-6_215)
• Griffiths, C. A., Dimov, S. S., Scholz, S. G., Hirshy, H. and Tosello, G. 2011. Process factors influence on cavity pressure behavior in microinjection moulding. Journal of Manufacturing Science and Engineering 133(3), article number: 31007. (10.1115/1.4003953)
• Griffiths, C. A., Dimov, S., Hirshy, H., Scholz, S. G., Fischer, S. and Spitzbart, M. 2011. Rapid tooling for microfluidic prototypes. Presented at: 6th International Conference on Manufacturing (ICOMM), Tokyo, Japan, 7-10 March 2011.
• Griffiths, C. A., Dimov, S. S., Scholz, S. G., Hirshy, H., Tosello, G., Hansen, H. N. and Williams, E. 2011. Cavity pressure behavior in micro injection moulding. Presented at: 4M2010: 7th International Conference on Multi-Material Micro Manufacture, Oyonnax, France, 17-19 November 2010 Presented at Fillon, B., Khan-Malek, C. and Dimov, S. S. eds.Proceedings of the 7th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing, (10.3850/978-981-08-6555-9_164)
• Griffiths, C. A., Dimov, S. S., Hirshy, H., Scholz, S. G., Fischer, S. and Spitzbart, M. 2011. Prototype tooling for producing small series of polymer microparts. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 225(12), pp. 2189-2205. (10.1177/2041297510393799)
• Velkova, V., Lalev, G. M., Hirshy, H., Omar, F., Scholz, S. G., Minev, E. and Dimov, S. S. 2011. Process chain for serial manufacture of 3D micro- and nano-scale structures. CIRP Journal of Manufacturing Science and Technology 4(4), pp. 340-346. (10.1016/j.cirpj.2011.03.005)

2010

• Velkova, V. et al. 2010. Design and validation of a novel master-making process chain for organic and large area electronics on flexible substrates. Microelectronic Engineering 87(11), pp. 2139-2145. (10.1016/j.mee.2010.01.015)

2009

• Velkova, V., Lalev, G. M., Hirshy, H., Scholz, S. G. and Dimov, S. S. 2009. Novel process chain for fabrication of Ni shims. Presented at: 4M 2009: 6th International Conference on Multi-Material Micro Manufacture, Karlsruhe, Germany, 23-25 September 2009 Presented at Saile, V., Ehmann, K. and Dimov, S. S. eds.Proceedings of 4M 2009: 6th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing pp. 411-414., (10.3850/4M2009RP001_9087)
• Svintsov, A., Zaitsev, S., G., L., Dimov, S. S., Velkova, V. and Hirshy, H. 2009. FIB sputtering optimization using Ion Reverse Software. Microelectronic Engineering 86(4-6), pp. 544-547. (10.1016/j.mee.2009.01.073)
• Lalev, G., Petkov, P. V., Sykes, N., Hirshy, H., Velkova, V., Dimov, S. S. and Barrow, D. A. 2009. Fabrication and validation of fused silica NIL templates incorporating different length scale features. Microelectronic Engineering 86(4-6), pp. 705-708. (10.1016/j.mee.2009.01.074)
• Scholz, S. G., Petkov, P. V., Brousseau, E. B. J. P., Griffiths, C. A., Hirshy, H. and Dimov, S. S. 2009. Process chain for replicating bio inspired micro structured surfaces. Presented at: 4M 2009: 6th International Conference on Multi-Material Micro Manufacture, Karlsruhe, Germany, 23-25 September 2009 Presented at Saile, V. and Ehmann, K. eds.Proceedings of 4M 2009: 6th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing pp. 271-274., (10.3850/4M2009RP001_9054)

2008

• Hirshy, H. A. 2008. Growth and characterisation of indium nitride. PhD Thesis, Cardiff University.

2007

• Butcher, K. S. A. et al. 2007. The nature of nitrogen related point defects in common forms of InN. Journal of Applied Physics 101(12), article number: 123702. (10.1063/1.2736654)

2006

• Butcher, K. S. A., Hirshy, H., Perks, R. M., Wintrebert-Fouquet, M. and Chen, P. P. 2006. Stoichiometry effects and the Moss-Burstein effect for InN. Physica status solidi (a) 203(1), pp. 66-74. (10.1002/pssa.200563504)