As-Fired Substrate Tolerances and Characteristics |
Compostion |
96% Al2O3 |
99.5% Al2O3 |
99.6% Al2O3 |
91% Al2O3 |
99.5% BeO |
AlN |
Manufacturer Part Number |
Coors ADS-96R |
NTK HA-96 |
Ceram Tek 708S |
Kyocera A-476 |
NTK HA-995 |
Coors ADS 995 |
Coors ADS 996 |
Coors Super-state |
Kyocera A-493 |
Coors ADOS 90R |
Brush Wellman 995 |
CBL 995 |
Toshiba K-170 |
Carborundum |
Color |
White |
White |
White |
White |
White |
White |
White |
White |
White |
Dark Brown |
nr |
White |
Ivory-Tan |
nr |
Surface Finish (Micro inches) |
<35 |
12 Ra |
24 Ra |
10-30 CLA |
3Ra "A" side |
5CLA "A" side |
3CLA "A" side |
2CLA "A" side |
3.0 |
<45 |
15 CLA max. |
<16 |
<32 Ra |
nr |
Grain Size (Microns) |
4-7 |
nr |
3-5 |
nr |
nr |
<2.2 |
<1.2 |
<1.0 |
<1.5 |
5-7 |
9-16 |
10-20 |
nr |
5-10 |
Length/Width (Inches) |
±1% NLT ±0.004 |
±0.8% NLT ±0.003 |
±1% NLT ±0.0039 |
±0.8% NLT ±0.004 |
±1% NLT ±0.004 |
±1% NLT ±0.004 |
±1% NLT ±0.004 |
±1% NLT ±0.004 |
nr |
±1% NLT ±0.004 |
±1% NLT ±0.004 |
±2% |
±1% min. ±0.004 |
±0.005 |
Thickness (Inches) |
±10% NLT ±0.0015 |
±10% NLT ±0.002 |
±10% |
±10% NLT ±0.002 |
±10% NLT ±0.002 |
±10% |
±10% |
±10% |
±10% |
±10% NLT ±0.0015 |
±10% NLT ±0.003 |
±0.003 |
±10% min. ±0.002 |
±0.003 |
Camber (Inch per Inch) |
<0.003 |
0.003 |
<0.4% of length |
0.003 |
0.003 |
0.003 |
0.003 |
0.003 |
0.003 |
<0.003 |
0.004 NLT 0.002 TIR |
0.003 |
nr |
nr |
Thermal Coeficient of Expansion (°C) |
8.0x10-6 25-1000°C |
7.7x10-7 25-700°C |
8.0x10-6 20-1000°C |
7.9x10-6 40-800°C |
8.1x10-7 25-700°C |
8.3x10-6 25-1000°C |
8.3x10-6 25-1000°C |
8.3x10-6 25-1000°C |
8.2x10-6 25-1000°C |
8.4x10-6 25-1000°C |
9.0x10-6 25-1000°C |
7.6x10-6 20-500°C |
4.6x10-6 |
4.2x10-6 RT-400°C |
Thermal Conductivity (g-cal/sec xcm2xC/cm) [W/m-K] |
[26] @20°C |
0.057 @25°C |
[24] 20-100°C |
0.05 @20°C |
0.070 @25°C |
[33.5] @20°C |
[34.7] @20°C |
[35.0] @25°C |
0.080 @25°C |
[13] @20°C |
0.6 @25°C |
[255] @50°C |
[170] |
170-19 |
Flexural Strength (kpsi) [MPa] |
58 |
47 |
[400] |
40 |
56 |
83 |
86 |
90 |
80 |
53 |
35 |
[230] |
[410] |
[290] |
Dielectric Constant @1MHz |
9.5 |
9.5 (20°C) |
9.8 |
9.4 |
9.7 (25°C) |
9.9 ±0.1 |
9.9 ±0.1 |
9.9 ±0.1 |
9.9 ±0.2 |
10.3 (25°C) |
6.5 |
6.36 (20°C) |
8.6 (25°C) |
8.9 RT |
Loss Tangent @1MHz |
0.0004 |
0.0003 (25°C) |
0.0003 |
0.0019 |
0.0001 (25°C) |
0.0001 |
0.0001 |
0.0001 |
0.0002 |
0.005 |
0.0004 max |
nr |
0.0005 (25°C) |
0.0005 RT |
Document Date or Number |
37-2-0893 |
OC-2085 (2)900 |
EL3GB 3.000 8930 |
003/001/9705 |
OC-2085 (2)9008 |
10-2-01940 |
10-2-01940 |
10-2-01940 |
003/001/9705 |
37-2-0893 |
CDDP-10 revC |
3/1/92 |
AMD-100 |
A-12083 |
This information is compiled for your convenience from the printed literature of the represented manufacturers. Emtron Hybrids does not guarantee the accuracy of this information, nor that ceramic made by these manufacturers will meet these specifications. |