LTCC properties

RF performance

substrate_ltcc_prop_rf

  • good impedance control
  • low to medium k-values
  • high conductive metals
  • low dielectric losses up to 40 GHz


Electrical properties of microwave materials

Green TapeTM 951-AT Green TapeTM 943-A5
Low Loss
Thick film on Aluminia (96%)

Dielectric constant

3 GHz
20GHz
40 GHz

 

7.8
7.8
n/a

 

7.4
7.4
7.4

 

9.0
9.0
9.0

Loss tangent

3 GHz
20GHz
40 GHz

 

0.005
0.008
0.014

 

0.001
0.001
0.002

 

0.0005
0.0009
0.001

Thermal conductivity (W/MK) 2.8 4.9 20
Insulation resistance
(at 100 VDC)
1012
1012 1012
Breakdown voltage per mil > 1000 VAC > 1000 VAC > 1000 VAC

 

Comparison DP951 tape vs DP943 tape

(DP943 meanwhile replaced by DP9K7TM)

Insertion loss of 2-layer Microstrip

substrate_ltcc_prop_comp