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Dielectric material, and device and memory device including same

A technology of dielectric materials and ferroelectric materials, applied in the direction of electric solid devices, fixed capacitor dielectrics, fixed capacitor parts, etc., can solve problems such as electric field increase, permittivity decrease, dielectric spontaneous polarization reduction, etc.

Pending Publication Date: 2022-04-22
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This necessarily causes a rapid rise in the electric field, which leads to a reduction in the spontaneous polarization of the dielectric, and thus a significant drop in the permittivity

Method used

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  • Dielectric material, and device and memory device including same
  • Dielectric material, and device and memory device including same
  • Dielectric material, and device and memory device including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] Example 1: 91BaTiO 3 ·8BiHoO 3 1KNbO 3 Preparation of dielectric materials

[0131] to obtain 91BaTiO 3 ·8BiHoO 3 ·KNbO 3 The stoichiometric ratio of weighed raw material powder (BaCO 3 、TiO 2 、 Bi 2 o 3 、Ho 2 o 3 、K 2 CO 3 , and Nb 2 o 5 ), it was placed in a planetary milling device that had been added with ethanol and zirconia balls, and then ball milled at room temperature for 12 hours in an air atmosphere. The ball-milled mixture was dried at 200° C. for 2 hours to obtain a dried mixed powder. The dried mixed powder was placed in an alumina crucible, and then a first heat treatment was performed at 800° C. for 10 hours in an air atmosphere. The product subjected to the first heat treatment was pressed with uniaxial pressure to prepare a disc. The prepared disc was subjected to cold isostatic pressing at 250 MPa, and then subjected to a second heat treatment at 1400 °C for 5 hours in an air atmosphere to prepare a material containing 91BaTiO 3 ·8Bi...

Embodiment 2

[0132] Example 2: 90BaTiO 3 ·8BiHoO 3 2KNbO 3 Preparation of dielectric materials

[0133] Dielectric material is prepared in the same manner as in Example 1, except as follows: the amount of raw material powder is controlled so that the prepared dielectric material has a 90BaTiO 3 ·8BiHoO 3 2KNbO 3 The composition ratio of the solid solution.

Embodiment 3

[0134] Example 3: 89BaTiO 3 ·8BiHoO 3 ·3KNbO 3 Preparation of dielectric materials

[0135] Dielectric material was prepared in the same manner as in Example 1, except as follows: the amount of raw material powder was controlled so that the prepared dielectric material had 89BaTiO 3· 8BiH 3· 3KNbO 3 The composition ratio of the solid solution.

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Abstract

The invention relates to a dielectric material, and a device and a memory device including the same. According to one aspect, there is provided a dielectric material having a composition represented by Formula 1: lt; formula 1gt; and (100-x-y) BaTiO3 * xBiREO3 * yABO3, and the structural formula is shown in the specification. Wherein in the formula 1, RE is a rare earth metal, A is an alkali metal, B is a pentavalent transition metal, and 0 lt is satisfied; xlt; 50, 0lt; yt; Yt; 50, 0 lt; x + y < lt >; 50.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority under 35 U.S.C. §119 of Korean Patent Application No. 10-2020-0137083 filed with the Korean Intellectual Property Office on October 21, 2020, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to dielectric (dielectric) materials and devices including them. Background technique [0004] According to continuous demand for miniaturization and higher capacity of electronic products, capacitors having a smaller size and higher capacity than existing capacitors are required. In order to implement capacitors with smaller size and higher capacity, dielectric materials that can provide further improved dielectric properties are required. [0005] In order to manufacture a multilayer ceramic capacitor (MLCC), which is a type of small-sized, high-capacity capacitor, it is necessary for the layers of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L49/02H01L27/108H01G4/12H01G4/30H10N97/00
CPCH01L28/56H01G4/1227H01G4/30H10B12/30C04B35/4682C04B35/64C04B35/6261C04B35/62645C04B35/62655C04B2235/3224C04B2235/3225C04B2235/3229C04B2235/3234C04B2235/80C04B2235/81C04B2235/762C04B2235/765C04B2235/604C04B2235/6567C04B2235/3251C04B2235/3255C04B2235/3239H01B3/12H01G4/1254H01L28/92H10B12/31H01G4/012C04B2235/3201H01L28/55
Inventor 赵奇迎朴贤哲梁大珍丁度源郑太远
Owner SAMSUNG ELECTRONICS CO LTD
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