High-purity (99.6%) alumina substrate |
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Kyocera’s Microwave Integrated Circuit (MIC) substrates feature thin-film circuit patterns on high-purity (99.6%) alumina or high dielectric constant ceramic material. |
 High Dielectric Constant (High K) Substrates |
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Higher dielectric constant allows microwave circuits to be miniaturized |
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High Q values are exhibited at high frequencies |
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Circuit operation is stable due to low thermal coefficient of dielectric constant |
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Thin-film resistor (Ta2N) material is available |
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| Ceramic Material Codes |
SV380 |
SH890 |
K140 |
| Dielectric Constant |
38+/-1 |
89+/-1 |
140+/-2 |
| Q Values |
>4000
(@10GHz)
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>1800
(@2.6GHz) |
>1000
(@5GHz) |
| Thermal Coefficient of Dielectric Constant (ppm/K) 20 to 60oC |
-30+/-30 |
-35+/-30 |
900+/-200 |
| Coefficient of Thermal Expansion (ppm/K) 40 to 400oC |
10.3 |
10.1 |
10.8 |
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| Note: Material properties listed above are typical values. Values may change upon further improvement or modification of materials and processes. |
| Resistor Material |
Ta2N |
| Sheet Resistance (Ω/SQ) |
10 to 100 |
| Thermal Coefficient of Resistance (ppm/K) -25 to 85oC |
-100+/-20 |
| Tolerance without Trimming |
+/-20% |
| Tolerance with Trimming |
+/-3% |
Long-Term Reliability:
Resistance Change after High-Temperature Storage
(125oC, 1000 hours) |
0.4% max. |
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