Ceramic Packages

LTCC (Low Temperature Co-Fired Ceramics)

What does LTCC mean?

What does LTCC mean

LTCC stands for Low Temperature Co-Fired Ceramics. These are also known as Glass Ceramics, because glass is mixed into the material. LTCC allow the use of low electrical resistance metals (such as copper) as conductors, since LTCC are co-fired under lower temperatures than other ceramics. As a result, LTCC can offer lower transmission loss than conventional alumina ceramics, and are therefore used to package cutting-edge semiconductors and high-frequency devices.

Features

  • Lower-Loss Characteristics at Higher Frequencies
    • Lower dielectric constant
    • Lower dielectric loss tangent
    • Lower frequency dependence
    • Lower conductor resistance (Cu)
  • Cavity Structure Options (GL773)
  • Unique Material Lineup

Typical Applications

Material Properties

Material Name GL570 GL580 GL773
Color White White Green
Laminating Structure Applicable Applicable Applicable
Dissimilar Material Bonding Not applicable Not applicable Not applicable
Characteristics Good Chip-level Reliability Miniaturization / Low profile Good Board-level Reliability
Applications Cutting-edge
semiconductor devices
Applications requiring
embedded functional elements
(multiplexers / filters)
Cutting-edge
semiconductor devices
Electrical
Characteristics
Dielectric Constant 1MHz 5.6 6.2 5.7
2GHz 5.7 6.1 5.8
Dielectric Loss Tangent
(x1.0E-4)
1MHz 3 4 5
2GHz 7 16 23
Thermal
Characteristics
CTE (ppm/K)
(RT~400℃)
3.4 10.4 11.7
Thermal Conductivity (W/(m・K)) 2.8 2.0 1.9
Mechanical
Characteristics
Flexural Strength (MPa) 200 270 280
Young’s Modulus of Elasticity (GPa) 128 103 95
Co-Fired Conductor Material Cu Cu Cu
*Material properties are representative values and subject to change.

Unique Materials

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