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| 96% Alumina Substrates:: |
| Thermal Conductivity: 24 W/mK |
| Surface Characteristics Available: |
Lapped: |
16-22µinches
.0005 inch / inch Camber
+/- 0.0005" Thickness Tolerance |
Polished: |
1-2 µinches
<0.0005 mils/inch Camber
+/- 0.0005" Thickness Tolerance |
| Metalization Techniques Available: |
Thick Film: |
Gold, Platinum Gold
Silver, Pladium Silver,
Dielectric
Resistors less than 100 ohms/square |
Thin Film: |
Ti/Pt/Au
TiW/Au
Cr/Ni/Au
TaN/TiW/Au
NiCr/Ni/Au
Copper Plate-up |
Refractory: |
Molybdenum or Tungsten with Ni/Au Plating |
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Thermal Conductivity
(W/mk) |
24
Coefficient of Thermal Expansion (ppm/c) |
8.2
Density (gm/cm3) |
3.72
Dielectric Constant
(@1mhz) |
9.0
Loss Tangent (@1mhz) |
0.0002 |
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| 99.5% Alumina Substrates:: |
| Thermal Conductivity: 35 W/mK |
| Surface Characteristics Available: |
Lapped: |
10-15 µinches
.0005 inch / inch Camber
+/- 0.0005" Thickness Tolerance |
Polished: |
1-2 µinches
<0.0005 mils/inch Camber
+/- 0.0005" Thickness Tolerance |
| Metalization Techniques Available: |
Thick Film: |
Gold, Platinum Gold
Silver, Pladium Silver,
Dielectric
Resistors less than 100 ohms/square |
Thin Film: |
Ti/Pt/Au
TiW/Au
Cr/Ni/Au
TaN/TiW/Au
NiCr/Ni/Au
Copper Plate-up |
Refractory: |
Molybdenum or Tungsten with Ni/Au Plating |
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Thermal Conductivity
(W/mk) |
35
Coefficient of Thermal Expansion (ppm/c) |
8.4
Density (gm/cm3) |
3.89
Dielectric Constant
(@1mhz) |
9.8
Loss Tangent (@1mhz) |
0.0002 |
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| 99.6% Alumina Substrates:: |
| Thermal Conductivity: 27 W/mK |
| Surface Characteristics Available: |
Lapped: |
10-15 µinches
.0005 inch / inch Camber
+/- 0.0005" Thickness Tolerance |
Polished: |
1-2 µinches
<0.0005 mils/inch Camber
+/- 0.0005" Thickness Tolerance |
| Metalization Techniques Available: |
Thick Film: |
Gold, Platinum Gold
Silver, Pladium Silver,
Dielectric
Resistors less than 100 ohms/square |
Thin Film: |
Ti/Pt/Au
TiW/Au
Cr/Ni/Au
TaN/TiW/Au
NiCr/Ni/Au
Copper Plate-up |
Refractory: |
Molybdenum or Tungsten with Ni/Au Plating |
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Thermal Conductivity
(W/mk) |
27
Coefficient of Thermal Expansion (ppm/c) |
7.0 - 8.3
Density (gm/cm3) |
3.87
Dielectric Constant
(@1mhz) |
9.9
Loss Tangent (@1mhz) |
0.0004 |
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Stellar Industries Corp. 50 Howe Avenue Millbury, MA 01527 | 877.840.1884 | 508.865.1668 | sales@stellarind.com |
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