journal article·2011-11

Fabrication of NdFeB microstructures using a silicon molding technique for NdFeB/Ta multilayered films and NdFeB magnetic powder

Yonggang Jiang, Takayuki Fujita, Minoru Uehara, Yuki Iga, Taichi Hashimoto, Xiuchun Hao, Kohei Higuchi, Kazusuke Maenaka

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Abstract

Abstract The silicon molding technique is described for patterning of NdFeB/Ta multilayered magnetic films and NdFeB magnetic powder at the micron scale. Silicon trenches are seamlessly filled by 12-μm-thick NdFeB/Ta multilayered magnetic films with a magnetic retentivity of 1.3 T. The topography image and magnetic field distribution image are measured using an atomic force microscope and a magnetic force microscope, respectively. Using a silicon molding technique complemented by a lift-off process, NdFeB magnetic powder is utilized to fabricate magnetic microstructures. Silicon trenches as narrow as 20 μm are filled by a mixture of magnetic powder and wax powder. The B–H hysteresis loop of the patterned magnetic powder is characterized using a vibrating sample magnetometer, which shows a magnetic retentivity of approximately 0.37 T.
Source: openaire · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Magnetic properties of thin films · Magnetic Properties of Alloys · Metallic Glasses and Amorphous Alloys

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (12)

Show source-provided references
1. Magnetic micro-actuators and systems (MAGMAS)10.1109/TMAG.2003.816763 ↗
2. K. Kobayashi, K. Ikuta, 3D magnetic microactuator made of newly developed magnetically modified photocurable polymer and application to swimming micromachine and microscrewpump, in: Proceedings of the IEEE MEMS Conference, Italy, 2009, pp. 11–14.10.1109/MEMSYS.2009.4805306 ↗
3. M. Tang, et al., Micromachined passive magnetostatic relays for portable applications, in: Proceedings of the IEEE MEMS Conference, Hongkong, China, 2010, pp. 779–782.10.1109/MEMSYS.2010.5442292 ↗
4. Electrodeposition of Co–Pt micron-size magnets with strong perpendicular magnetic anisotropy for MEMS applications10.1016/j.jmmm.2003.12.990 ↗
5. Electrodeposited Co–Pt permanent micromagnet arrays on Cu(111)/Si(110) substrate, magnetics10.1109/TMAG.2002.801928 ↗
6. Sputtered permanent Nd–Fe–B magnets10.1016/0304-8853(93)90045-4 ↗
7. N. Wang, D.P. Arnold, Fully batch-fabricated MEMS magnetic vibrational energy harvesters, in: Proceedings of the PowerMEMS, Washington DC, USA, 2009, pp. 348–351.
8. Improved perpendicular anisotropy andpermanent magnetic properties in Co-doped Nd–Fe–B films multilayered with Ta10.1109/TMAG.2005.854868 ↗
9. Micro-patterning of NdFeB and SmCo magnet films for integration into micro-electro-mechanical-systems10.1016/j.jmmm.2008.09.028 ↗
10. Plasma etching of magnetic multilayers—effect of concurrent UV illumination10.1016/S0921-5107(99)00424-9 ↗
11. Comparison of Nd–Fe–B surface treated by chemical etching in the absence and presence of a magnetic field10.1246/cl.1999.589 ↗
12. Micro-structuring of thick NdFeB film using high-power plasma etching for magnetic MEMS application10.1088/0960-1317/21/4/045011 ↗