menu skip

nav go content go

KCC MARKET

Introduce KCC Products.

CLOSE

    Fine Ceramics

    HOME Business ProductsSpecial MaterialsFine Ceramics
    Developed based on the best technology
    and state-of-the-art equipment
    Fine Ceramics
    Over the past 50 years, KCC has been leading the way in the development of Korea’s industrial and construction materials and has been developing fine ceramic products and state-of-the-art inorganic new materials based on its accumulated experience and material technology. Thereby becoming the unrivalled leader in the field of electrical/electronic insulation materials.

    KCC produces DCB (Direct Copper Bonding) substrates, essential materials for power modules, based on its ceramic substrate tape casting technology. KCC has a variety of ceramic substrate technologies, including the DCB substrate technology that uses alumina (Al2O3) and AlN, and is concentrating its efforts on technological development that ensures customer satisfaction. Above all, it has been leading the way in the field of electrical/electronic materials with its product quality and competitiveness thanks to a manufacturing process that takes raw materials and yields finished products.

    Applications

    • IGBT(Insulated Gate Bipolar Transistor) Module
    • Diode Module
    • SCRs, Thyristors Module
    • IPM(Intelligent Power Module)

    DCB substrate

    DCB substrate is a directly bonded material composed of ceramic substrate (AI2O3 or AIN) and copper which are tightly joined together through hypo-eutectic process.

    DCB substrate

    Material property

    • High Thermal Conductivity
    • Low Thermal Expansion
    • High Strength
    • High Wettability for solder

    Applied Area

    • Automotive
      : ABS, Power Steering, DC/DC Converter, LED lighting, Ignition Control
    • Power Electronics
      : IGBT, MOSFET, Thyristor module, Solid-state-relays, Power transistors, Diode
    • Home Appliance
      : Air-conditions, Peltier coolers
    • Industrial
      : LED displays, Welding Machine
    • Aerospace
      : Laser, Power supply for satelites and aircrafts
    • Environmental Technology
      : Local power generation, Electric Vehicle, Traction control system, Photovoltaic units, Wind power
    • PC / IT
      : Power supply, UPS

    Patterning Process

    Patterning Process

    White substrate

    White substrate refers to ceramic substrate(AI2O3 or AIN) which has a high thermal conductivity that results in rapid radiation of heat, high beat-resistance and high impact strength which can withstand a sudden generation of heat.

    White substrate

    Material property

    • High Flexural Strength
    • High Thermal Conductivity
    • Low Dielectric Constant
    • Low Surface Roughness

    Applied Area

    • Resistor substrate for Communication area
    • Thermal Print Head
    • Image Sensor Head
    • Power Module

    Available Ceramic Type/Thickness

    • Alumina (96%) AI2O3
      : 0.25mm, 0.32mm, 0.38mm, 0.50mm, 0.63mm, 1.00mm
    • Aluminum Nitride AIN
      : 0.31mm, 0.38mm, 0.63mm, 1.00mm

    Characteristics

    Item Unit Spec. Remark
    Alumina Content % 96
    Density g/cc 3.8 ASTM C20-80
    Color White
    Dimension Thickness 0.25 On Request
    (±7 %, NLT ±0.05)
    Size ㎜(inch) Max. 140 X 190(5.5 X 7.5) On Request
    Camber % ≤0.3
    Surface Roughness(Ra) ≤0.5 Profilometer
    Mechanical Flexural Strength MPa 420 ASTM F417
    Characteristics Young's Modulus GPa 340
    Electrical Resistivity Ω㎝

    >1014

    Electric Eielectric Constant 9.8
    Characteristics Dielectric Strength ㎸/㎜ 26 ASTM D149
    Dielectric Loss(1MHz) 0.0003
    Thermal Thermal Conductivity W/mK >25 ASTM C480
    Characteristics *Coefficient of Thermal Expansion* 10-6/℃ 6.8(20-600℃) ASTM D257
    10-6/℃ 7.8(20-1000℃) ASTM D257

    Overview

    KCC has taken the lead in developing materials for construction and industries over the last 30 years. Based on its accumulated experience and technologies in inorganic materials, KCC has developed and supplied fine ceramics, cutting- edge inorganic materials, by applying and advancing its technologies in organic materials.

    With the introduction of the latest equipment and technologies, KCC established an effective automation process and applied strict quality control. KCC promises to do its best to promptly supply the best-quality metalized ceramics to its customers and assure thorough post-management to improve product quality.

    Products Technologies
    • Ceramic tubes for vacuum circuit breakers
    • Magnetron cathode & antenna
    • Surge arrester tubes
    • Rectifier containers
    • Metal-ceramic assemblies
    Manufacturing Technologies
    • Metallizing
    • Screen printing
    • High temperature glazing
    • Electroytic & electroless plating
    • Brazed assemblies

    SPECIFICATION

    P

    H

    Y

    S

    I

    C

    A

    L
    Units AM 94 AM 995
    Al203 94 99.5
    Crystal size 10 15
    Fiexural strength Mpa 350 380
    Dielectric at25℃ 9.1 9.7
    constant 100MHz
    Specific gravity g/㎤ 3.65 3.85
    Coeff. of thermal %/℃ 8 X 10-6
    expansio
    Max. use temp 1600 1700
    T

    E

    S

    T
    Bonding strength ㎏/㎠ 975 ↑
    of metallized
    assembly
    Leak test of atm ㏄/sec 5 X 10-10 ↓
    brazed joint
    Thermal cycle test No crachs or failure after 10 cycle
    <-30℃ (3hr), room temp(1hr),
    100℃(3hr), room temp(1hr)>
    Thermal shock test No cracks or failure after 3 cycle
    <90℃(15min), 0>℃(15min)>

    Fine structure

    미세구조 이미지
    VI 용 CERAMIC 이미지

    Use

    Normally, when a rate current runs in a VCB (vacuum circuit breaker), contact materials are attached to each other. However, in the case of a sudden surge of current, they become automatically separated through detection by an electric sensor. During this stage, the current generates an arc that that could cause a fire or severe damage. The ceramic cylinder in a vacuum interrupter plays a vital role in preventing such accidents.

    Shape

    Ceramics for VI come in the shape of tubes. But depending on the design of the external and internal surfaces of the ceramic cylinder’s body, they can be classified into “simple” or “shaded” types and “step” or “grooved” types.

    Required Features

    As a component used in vacuum interrupters through the bonding of the two different materials, these are ceramics that offer excellent insulation and excellent conductivity. Ceramics for VI also offer high heat resistance, voltage resistance, shock resistance and vacuum maintenance.

    MGT용 CERAMIC 이미지

    Use

    Magnetron converts the supplied power in microwave ovens and industrial dryers to electromagnetic wave in the microwave (high-frequency microwave) unit, and it generates thermal energy by the friction and vibration of water molecules. Ceramics for MGT maintain air tightness and insulation in the magnetron.

    Shape

    • It is a small product. One set of magnetron consists of one cathode and one antenna. A spacer is also used depending on the structure of the magnetron.

    Required Features

    Ceramics for MGT are manufactured using high-grade assembling technology and vacuum technology and are installed in magnetrons using such metals as Mo-Mn and Ni. They offer thermal shock resistance, airtightness and insulation, which can endure high frequencies of 0.5~2.0 KW and an oscillation frequency of 2,450 MHz.

    POWER TUBE용 CERAMIC 이미지

    Use

    Ceramics for power tubes are used in high-frequency heating devices and sound-frequency amplification devices. They are also used in UHF/VHF TV for broadcasting, FM/AM shortwave radios, X-ray machines, radars for the defense industry, and industrial RF welders for plastic sealing. The power tube is also called the power grid tube, ionic tube, electron tube, launching tube, and electron tube.

    Shape

    It has various shapes, such as the tube type, disk type, cone type and so on.

    Required Features

    It is used in various power tubes that handle voltages of up to 200 KV, frequencies of up to 3000 MHz, power of up to 500 KW and magnetrons that generate frequencies of over 2.0KW. It is also installed in electronic devices in combination with such metals as Mo Mn and Ni. It offers good thermal shock resistance, air tightness, and insulation.

    SCR HOUSING용 CERAMIC 이미지

    Use

    SCR housing ceramics are used in silicon controlled rectifier, which are sued to change an alternating current to direct current and to offer protection from sudden surges in current.

    Shape

    It is available in flat, stud and cone types.

    Required Features

    The vital features of SCR ceramics lie in its abilities to dissipate an arc generated during the control of high voltage in the rectifier and to withstand thermal shocks, their high electricity resistance and to maintain mechanical strength and vacuum tightness.

    KCC supplies parts, manufactured through the unitization of a variety of ceramics and metal parts, which are capable of shortening the manufacturing process and cutting unit cost through the development of unitized module products based on KCC’s core technologies, such as metalizing and brazing technologies. KCC also supplies top-notch assembly products through its own production facilities that manufacture a variety of metal parts, including its state-of-the-art high vacuum brazing facilities and continuous brazing facilities.

    Applications

    • SCR housing
    • Feed-through
    • Reflector
    • High-power receptacles
    • Insulating rings & cylinders
    • Power switches
    • X-ray tubes
    M

    e

    c

    h

    a

    n

    i

    c

    a

    l
    Properties Unit Test Method Alumina
    AM94 AM96 AM97 AM995
    Color White White White Ivory
    Alumina Content 94 96 97 99.5
    Bulk Density g/㎤ ASTM C20-83 3.7 3.8 3.8 3.9
    Surface Roughness Profilometer max0.6
    Water Absorption ASTM C373-72 0 0 0 0
    Average Crystallion Size ASTM E112-88 4 3 3 4
    Flexura Strength(20℃) ASTM F417-78 350 370 370 380
    Elastic Modulus ASTM C773-83 290 310 340 360
    Poisson's Ratio ASTM C773-83 0.22 0.22 0.22 0.22
    Compressive Strength ASTM C773-83 2100 2100 2500
    Hardness 12 12 14
    Fracture Toughness ㎫·m1/2 03-04 12 14
    T

    h

    e

    r

    m

    a

    l
    Thermal Conductivity(20℃) W/mK ASTM C408-82 21 24 25 28
    Coefficient of Thermal x10-6/℃ ASTM C372-81 8 708 7.8 8.1
    Expansion(20-1000℃)
    Specific Heat ㎈/g℃ ASTM C351-82 0.2 0.2 0.2 0.2
    Thermal Shock Resistance 200 200 200 200
    Max. Use Temperature 1600 1600 1600 1650
    E

    l

    e

    c

    t

    r

    i

    c

    a

    l
    Dilectric Strength KV/MM ASTM D116-76 ≥12 ≥15 ≥17 ≥17
    Dielectic Constance(1MHZ, 25℃) ASTM D150-81 9.2 9.6 9.7 9.7
    Dielectric Loss(tan delta ASTM D150-81 0.0004 0.0003 0.0002 0.0002
    1MHZ, 25℃)
    Volume Resisivity(25℃) Ω ㎠/㎝ ASTM D1829-66 >1014 >1014 >1014 >1014