Novel Granular High Permeability Materials and Integrated Inductors for Power Delivery and Wireless Communication

1）研究新型颗粒状高磁导率（high-m）材料，即Co-Fe-Hf-O，其饱和磁化强度为m0 Ms 1.0特斯拉，高电阻率为1000 mWcm，这将能够抑制涡流损耗和有效的电感器设计。2)研究控制颗粒状高磁电阻材料磁各向异性的基本机制，这在很大程度上被忽视，但对电感器性能至关重要。3)设计和制造集成电感器结构，在200 MHz的频率下真正释放高m材料的功率。4)通过博士论文研究、本科生（REU）研究经验和课堂教学，为研究生和本科生提供有关集成电感器技术的教育。 拟议活动产生的更广泛影响包括：1）本研究中的发现将使电力输送和无线通信设备以及许多其他微电子应用小型化。2)PI与英特尔和HGST建立了密切的合作关系，以便将技术快速转移到商业领域。3)他与日本和荷兰的研究人员合作，以产生国际影响。4)在过去的两年里，斯坦福大学拟议的研究重点已经接待了三名本科生研究人员（一名女性），预计未来将向更多的本科生推广。

0423908WangThe objective of this research are as follows: 1) Investigate novel granular high permeability (high-m) materials, namely Co-Fe-Hf-O with a saturation magnetization of m0Ms 1.0 Tesla and a high resistivity of 1000 mWcm, which will enable suppression of eddy current losses and efficient inductor designs. 2) Investigate fundamental mechanisms controlling the magnetic anisotropy in granular high-m materials, which is largely neglected but critical to inductor performance. 3) Design and fabricate integrated inductor structures which will truly unleash the power of high-m materials at a frequency of 200 MHz. 4) Educate graduate students and undergraduates about integrated inductor technology via doctoral thesis research, research experience for under graduate (REU), and classroom teaching. The broader impacts resulting from the proposed activity include: 1) The discovery made in this research would enable miniaturization of power delivery and wireless communication devices, and many other microelectronics applications. 2) The PI has established close collaborations with Intel and HGST to allow a speedy technology transfer to the commercial sector. 3) He has collaborations with researchers in Japan and the Netherlands to make an international impact. 4) The proposed research thrust at Stanford has hosted three undergraduate researchers (one female) in the past two years and can be expected to outreach to more undergraduate students in the future.