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US06376393B1 Method for producing anisotropic dielectric layer and devices including same 失效
标题翻译：各向异性介电层的制造方法及其制造方法
公开(公告)号：US06376393B1
公开(公告)日：2002-04-23
申请号：US09224044
申请日：1998-12-31
申请人： Mike Newton , Joseph P. Dougherty , Else Breval , Maria Klimkiewicz , Yi Ton Shi , Dean Arakaki
发明人： Mike Newton , Joseph P. Dougherty , Else Breval , Maria Klimkiewicz , Yi Ton Shi , Dean Arakaki
IPC分类号： H01L2131
CPC分类号： G06K9/00053 , A61B5/0531 , A61B5/1172
摘要： 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.
摘要翻译：制造各向异性介电层的方法包括以下步骤：形成包含多个可磁化颗粒的流体层，例如在能够固化的流体中，将可磁化颗粒的构型固定在电介质基质中; 通过向其施加磁场来将流体层的可磁化颗粒对准预定构造; 以及通过固化所述流体将所述对准的可磁化颗粒固定在所述电介质基质内的所述预定构型中。在一个特别有利的应用中，将流体层涂覆到诸如指纹传感器的集成电路的表面部分上，以提供机械保护而不影响图像分辨率。此外，对于某些装置的对准步骤优选地包括以预定构型对准可磁化颗粒，使得垂直于各向异性介电层的阻抗小于平行于各向异性介电层的阻抗。可磁化颗粒可以混合在可固化聚合物流体中，并且固定排列的可磁化颗粒的步骤可以包括固化可固化聚合物流体，例如通过施加热量或辐射。

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