低溫共燒陶瓷用原料

產品說明

Composite Powder for Low Temperature Cofired Ceramics

Composite Powder for low temperature cofired ceramics is a composite material that is made by uniform blending glass and ceramic filler. Firing can be conducted at a low temperature in the range of 870-900℃, which allows the use of highly conductive elements such as gold and silver paste to create a screen print circuit pattern with high electric properties.

 

Features

  • MLS-25M5 is a vitreous material with a low CTE* and a low dielectric constant. 
  • MLS-25E    is a vitreous material with a very low dielectric constant.
  • MLS-41      is a devitrifiable material with a high dielectric constant.
  • MLS-23K    is a a new product with a low dielectric constant and low tan δ.
  • MLS-26      is a devitrifiable material with high mechanical strength.
  • MLS-63      is a devitrifiable material with high mechanical strength and low tanδ.
      * CTE : coefficient of thermal expansion
 
Properties/Glass Code MLS-25M5 MLS-25E MLS-41 MLS-23K MLS-26 MLS-63  
Bending strength MPa 157 125 250 150 320 400  
Dielectric constant 1MHz,25°C   4.9 3.9 17.0 3.9 7.1 8.0  
15GHz,25°C   4.8 3.9 19.0 4.0 6.7 7.9  
Tan δ 1MHz,25°C ×10-4 25 5 20 5 4 5  
15GHz,25°C ×10-4 47 21 50 15 58 11  
Coefficient of thermal expansion 30-380°C ×10-7/K 42 60 84 65 58 87  
Density * ×103kg/m3 2.52 2.29 4.36 2.24 3.02 3.52  
Transformation point °C 500 500 700 525 625 725  
Volume resistivity Log ρ  150°C Ω•cm 13.5 >14 ─ >13.8 12 >14  
Thermal conductivity W/m•K 1.9 1.7 3.1 1.7 3.9 4.1  
Particle size D50 μm 3.3 3.5 1.1 1.0 2.6 1.6  
Dmax μm 20 20 10 15 15 10  
Glass type SiO2.B2O3 Nd2O3.TiO2.SiO2 SiO2.B2O3 SiO2.CaO.Al2O3  

 

Application Examples

Method

1. Casting and Printing

Glass-Ceramic powder, binder resin, solvent and plasticizer are thoroughly mixed and cast into a 50-300 μm thick green sheet using the doctor blade method. Individual sheets are cut into appropriate sizes from the green sheet and punched with via holes and then screen-printed with a circuit pattern.

2. Lamination

Green sheets are laminated at 50-100℃ and under 10-35 MPa pressure.
 

3. Firing

Firing is carried out in the air.

 

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