“…Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http:// www.tandfonline.com/page/terms-and-conditions INTRODUCTION Aluminum nitride ceramics are of high potential for electric substrates because of their high thermal conductivity (320 W=mK theoretical value), low dielectric constant (8)(9), low conductivity (10 À11 -10 À13 X=cm), and low thermal expansion coefficient (4.5 Â 10 À6 K À1 ) [1][2].…”