Method of manufacturing a ceramic stack

Metal working – Piezoelectric device making

Reexamination Certificate

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Details

C029S594000, C310S328000, C310S311000, C310S321000, C310S331000, C156S089120, C156S221000, C156S222000

Reexamination Certificate

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07062825

ABSTRACT:
A method of producing a ceramic stack is provided, including the steps of providing at least a first ceramic green sheet to be formed into a long ceramic plate and having a principal surface, providing at least a second ceramic green sheet to be formed into a short ceramic plate and having a length that is less than a length of the principal surface of the first ceramic green sheet, and laminating the second ceramic green sheet to the principal surface of the first ceramic green sheet to form a ceramic green sheet laminate having a lamination border defined between at least a side surface of the second ceramic green sheet and the principal surface of the first ceramic green sheet. The method also includes the steps of forming a member having a curved surface at the lamination border by applying a paste to the lamination border such that the curved surface includes at least one inflection point when viewed in cross-section, and sintering the laminate into an integral unit to form the ceramic stack.

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Rhee et al., “Investigation of High Frequency (2.5 GHz, 30 GHz) Processing of Pb-based Piezoelectrics for Ultrasound Transducers”, 2000 IEEE Ultrasonics Symposium, Oct. 2000, pp. 981-984 vol. 2.

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