めっき技術

Ceramics

Ceramics can be broadly divided into structural ceramics excelling in thermal resistance, hardness, and corrosion resistance, such as alumina (Al2O3), silicon nitride (Si4N4), and silicon carbide (SiC); and electronic ceramics, such as 2MgO・Al2O3 as insulating materials, BaTiO3 as dielectric materials, PZT(Pb(Zr, Ti)O3) and other piezoelectric materials, and titania (TiO2) and other sensor materials. Tin plating and gold plating are used to form electrodes on IC boards and IC packages.
Field Functions and names Type of ceramic Uses
Light Optical transfer (glass optical fiber)
Modulation and deflection of light (ferroelectric body)
Absorptance and reflectance change (optical memory material)
Light-energy conversion (photoelectrochemical film)
Silica-based glass
LiNbO3 thin film
Chalcogenide-based amorphous film
Titanium oxide film
Optical communication
Light passageway, light shutter
Laser disk
Hydrogen formation from water
Electromagnetism High dielectric constant (dielectric body)
High piezoelectric effect (piezoelectric body)
High ionic conduction (super-ionic conductor)
BaTiO3 lead zirconate titanate
β-alumina (Al2O3)
Chip capacitors, PZT spark plugs
Solid cells, circuit boards (hybrid ICs, power modules)
Heat Thermal shock resistance (low-expansion ceramic)
Low-temperature firing (substrate)
SiO2-TiO2 glass
Crystallized glass
Astronomical telescopes
Circuit boards
Mechanical structure High strength and thermal resistance (high-strength, high-toughness ceramic)
Machinability (mica crystallized glass)
Alumina, stabilized zirconia, silicon carbide, silicon nitride, diamond
K2O‐Al2O3‐SiO2‐F crystallized glass
Automotive engines, pumps, joining (of ceramics and metals: brazing)
Abrasive compounds, scissors
Chemical Catalyst carrier (cellular ceramic) Porous glass Automotive exhaust treatment
Biological Biological compatibility (artificial bones, artificial teeth) Alumina (Al2O2), apatite crystal Joints, teeth, artificial bones

(From “Sentanzairyo no Kiso-Chishiki” edited by the Society of Materials Science, Japan; Ohmsha)

採用事例
Ceramics
Cross-section structure of laminated ceramic capacitor
(From “2018nen made no Denshi Buhin Gijutsu Rodo Mappu;”
Japan Electronics and Information Technology Industries Association)