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.

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