18608999. MULTILAYER CERAMIC CAPACITOR simplified abstract (Murata Manufacturing Co., Ltd.)

MULTILAYER CERAMIC CAPACITOR

Organization Name

Murata Manufacturing Co., Ltd.

Inventor(s)

Hideyuki Hashimoto of Nagaokakyo-shi (JP)

Takehisa Sasabayashi of Nagaokakyo-shi (JP)

MULTILAYER CERAMIC CAPACITOR - A simplified explanation of the abstract

This abstract first appeared for US patent application 18608999 titled 'MULTILAYER CERAMIC CAPACITOR

The abstract describes a multilayer ceramic capacitor with dielectric ceramic layers and inner electrode layers, where the dielectric ceramic layers contain crystal grains with a perovskite oxide structure.

• The dielectric ceramic layers exhibit a perovskite structure when observed under a scanning transmission electron microscope.
• The crystal grains in the dielectric ceramic layers have an atom-distributed region with a low concentration of certain elements, such as A-site or B-site elements.
• The atom-distributed region in the crystal grains has a concentration difference of about 2 atm % or less from the maximum concentration of the element.
• The area of the atom-distributed region is about 0.050 nm or less.

Potential Applications: - Electronics industry for capacitors in various electronic devices. - Energy storage applications where high-performance capacitors are required.

Problems Solved: - Improved performance and reliability of multilayer ceramic capacitors. - Enhanced efficiency in energy storage applications.

Benefits: - Higher capacitance and energy storage capabilities. - Increased durability and stability in operation.

Commercial Applications: Title: Advanced Multilayer Ceramic Capacitors for Electronics Industry This technology can be utilized in the production of capacitors for consumer electronics, automotive electronics, and industrial equipment, enhancing performance and reliability.

Questions about Multilayer Ceramic Capacitors: 1. How does the atom-distributed region in the crystal grains impact the performance of the capacitor?

  The atom-distributed region with low element concentration helps improve the stability and efficiency of the capacitor.

2. What are the key advantages of using a perovskite oxide structure in dielectric ceramic layers?

  The perovskite oxide structure enhances the dielectric properties of the capacitor, leading to higher performance and reliability.

Original Abstract Submitted

A multilayer ceramic capacitor includes dielectric ceramic layers and inner electrode layers. The dielectric ceramic layers include crystal grains including a perovskite oxide including at least one A-site element and at least one B-site element. When a cross-section of the dielectric ceramic layers is observed using a scanning transmission electron microscope, the dielectric ceramic layers include grains, on which a plane of a perovskite structure is observed, as crystal grains. The grains, when subjected to compositional analysis by energy dispersive x-ray spectroscopy, have an atom-distributed region in which a concentration of the A-site element or B-site element (c) subtracted from a maximum concentration of the element (c) (Δc=c−c) is about 2 atm % or less, at one or more atomic sites in the grains, and an area of the atom-distributed region (S) is about 0.050 nmor less.