Emtron Hybrids will metallize the following Substrate Types.
Alumina AL2O3 |
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91% to 99.6% (96% typical) |
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0.010" to 0.100" thick |
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Area up to 6" x 8" |
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CO2 Laser processing allows any shape and size. |
99.5% Beryllia (BeO) |
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Thermal conductivity second only to diamond among electrically insulating materials, dissipating nearly 300 W/mK at room temperature |
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0.015" to 0.080" thick (.025, .040 and .060" typical) |
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Area up to 4"x 4" |
Aluminum Nitride (AlN) |
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0.020" to 0.040" thick (.025 and .040" typical) |
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Area up to 4.500" x 4.500" |
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Conducts heat almost as well as BeO, with lower toxicity |
Laser Processing
Standard Tolerance From Substrate Edge
From to |
Scribe Line |
Hole Center |
Machined Feature |
Scribed Edge |
± 3 mils |
± 3 mils |
± 3 mils |
Alignment Flat or Machined Edge |
± 1 mil |
± 1 mil |
± 1 mil |
As-Fired Edge |
± 10 mils |
± 10 mils |
± 10 mils |
Standard Internal Location Tolerance
From to |
Scribe Line Center |
Hole Center |
Machined Edge |
Scribed Line Center |
± 1 mil |
± 1 mil |
± 1 mil |
Hole Center Flat or Machined Edge |
± 1 mil |
± 1 mil |
± 1 mil |
Machined Edge |
± 1 mil |
± 1 mil |
± 1 mil |
Standard Hole Tolerance and Taper
Material Thickness |
Tolerance |
Maximum Taper |
5-30 mils |
± 1 mil |
2 mils |
31-60 mils |
± 2 mils |
3 mils |
61-100 mils |
± 3 mils |
4 mils |
As-Fired Substrate Tolerances and Characteristics
Composition |
96% Al2O3 |
91% Al2O3 |
99.5% BeO |
AlN |
Manufacturer Part Number |
Coors ADS-96R |
NTK HA-96 |
Ceram Tek 708S |
Kyocera A-476 |
Coors ADOS 90R |
Brush Wellman 995 |
CBL 995 |
Toshiba K-170 |
Carborundum |
Color |
White |
White |
White |
White |
Dark Brown |
nr |
White |
Ivory-Tan |
nr |
Surface Finish Micro inches) |
<35 |
12 Ra |
24 Ra |
10-30 CLA |
<45 |
15 CLA max. |
<16 |
<32 Ra |
nr |
Grain Size (Microns) |
4-7 |
nr |
3-5 |
nr |
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 |
±2% |
±1% min. ±0.004 |
±0.005 |
Thickness (Inches) |
±10% NLT ±0.0015 |
±10% NLT ±0.002 |
±10% |
±10% NLT ±0.002 |
±10% NLT ±0.0015 |
±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 |
0.004 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 |
8.4x10-6 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 |
[13] @20°C |
0.6 @25°C |
[255] @50°C |
170 |
170-190 |
Flexural Strength (kpsi) [MPa] |
58 |
47 |
[400] |
40 |
53 |
35 |
[230] |
[410] |
[290] |
Dielectric Constant @1MHz |
9.5 |
9.5 (20°C) |
9.8 |
9.4 |
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 |
0.005 |
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 |
37-2-0893 |
CDDP-10 revC |
3/1/92 |
AMD-100 |
A-12083 |
Please Note that this information is compiled for your convenience from the printed literature of the represented manufacturers. Emtron Hybrids cannot guarantee the accuracy of this information or that ceramic made by these manufacturers will meet these specifications. |
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