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Three dimensional periodic structure and method of producing the

A periodic structure and periodic ground technology, applied in chemical instruments and methods, crystal growth, instruments, etc., can solve problems such as increasing dielectric constant and refractive index

Inactive Publication Date: 2005-07-20
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Difficult to further increase the contrast between permittivity and refractive index

Method used

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  • Three dimensional periodic structure and method of producing the
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Embodiment Construction

[0027] The three-dimensional periodic structure and its manufacturing method will be sequentially described with reference to the drawings.

[0028] 2A and 2B are perspective views each showing a three-dimensional structure of a photonic crystal. FIG. 2A shows the cured epoxy resin 1 and a plurality of holes h formed in a piece of resin 1. The unit cell bottom layer 100' is composed of resin 1 containing holes h. FIG. 2B shows a state where the conductive film 2 is formed on the surface of the resin 1 shown in FIG. 2A. The unit cell 100 is formed by forming the conductive film 2 on the interface between two substances having different dielectric constants, that is, the resin 1 and air.

[0029] As described below, these holes h are periodically distributed in a three-dimensional space. Due to this structure, a three-dimensional periodic structure is provided in which two substances having different dielectric constants, resin 1 and air, are periodically distributed in a three-dime...

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Abstract

There is provided a three dimensional periodic structure comprising two substances having different dielectric constants with a high contrast between the dielectric constants or refractive indexes, periodically distributed in a three dimensional space. A unit cell substrate having air holes in a diamond structure is formed by a stereo lithography method which repeats the step of irradiating light onto a liquid surface of alight-hardening resin such as a photosensitive epoxy resin in each layer in a cross-sectional pattern to be formed. Then, a conductive film made of, for example, Cu is formed by an electroless plating method on the surface of the unit cell substrate. Thus, a three dimensional periodic structure comprising two substances having different dielectric constants, i.e., resin and air, periodically distributed in a three dimensional space, and comprising a conductive film formed at an interface between the two substances is obtained.

Description

Technical field [0001] The invention relates to a three-dimensional periodic structure and a manufacturing method thereof. Background technique [0002] Due to the atomic nuclei in the solid crystal, the periodic potential distribution exhibits the interference of electron waves whose wavelength corresponds to the lattice constant. For example, when the wavelength of the electron wave is very close to the crystal potential period, reflection occurs through three-dimensional diffraction (Bragg diffraction). This phenomenon prevents electrons within a specific energy range from passing through. Therefore, an electronic band gap used in a semiconductor device is formed. [0003] Similarly, a three-dimensional structure that periodically changes the refractive index or dielectric constant exhibits electromagnetic wave interference, thus blocking electromagnetic waves in a specific frequency range. In this case, the forbidden frequency band is called the photonic band gap, and the thr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/12B29C67/00C30B5/00G02B1/02G02B5/18G02B6/13
CPCC30B5/00C30B29/60Y10T428/31678
Inventor 桐原聪秀宫本钦生中川卓二田中克彦
Owner MURATA MFG CO LTD