Harris Corporation

Yi Ton Shi

Joseph P Dougherty

Mike Newton

Else Breval

Dean Arakaki

Maria Klimkiewicz

A method for making an anisotropic dielectric layer includes the steps of: forming a fluid layer comprising a plurality of magnetizable particles, for example, in a fluid capable of solidifying to fix the configuration of the magnetizable particles in a dielectric matrix; aligning the magnetizable particles of the fluid layer in a predetermined configuration by applying a magnetic field thereto; and fixing the aligned magnetizable particles in the predetermined configuration within the dielectric matrix by solidifying the fluid. In one particularly advantageous application, the fluid layer is coated onto a surface portion of an integrated circuit, such as a fingerprint sensor, to provide mechanical protection without effecting the image resolution. In addition, the step of aligning for certain devices preferably comprises aligning the magnetizable particles in a predetermined configuration so that an impedance perpendicular to the anisotropic dielectric layer is less than an impedance parallel to the anisotropic dielectric layer. The magnetizable particles may be mixed in a curable polymer fluid, and the step of fixing the aligned magnetizable particles may comprise curing the curable polymer fluid, such as by applying heat or radiation.

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State College, PA, United States of America

Yi Ton Shi