PM Industries: Precision Manufacturing Services


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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

Carbo-
rundum

Color

White

Dark
Brown

White

Ivory-
Tan

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

Grain Size
(Microns)

4-7

3-5

<2.2

<1.2

<1.0

<1.5

5-7

9-16

10-20

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

±2%

±1%
min.
±0.004

±0.005

Thickness
(Inches)

±10%
NLT
±0.0015

±10%
NLT
±0.002

±10%

±10%
NLT
±0.002

±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

0.004
NLT
0.002 TIR

0.003

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

8.2x10^-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]

[400]

[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
±0.2

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

0.0002

0.005

0.0004
max

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

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. P/M Industries does not guarantee the accuracy of this information, nor that ceramic made by these manufacturers will meet these specifications.

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