Ceramic Dielectric
Tecdia produces most of the ceramic wafers used to manufacture its capacitors, resistors, and other products using ceramic powders consisting of proprietary titanate (primarily with barium) formulations. A variety of dielectrics are produced from these formulations providing a wide selection of performance characteristics that are classified in accordance with the EIA standard for capacitor ceramic dielectrics.
We separate the products into two categories based on the ceramic manufacturing technology: i) conventional fine grained ceramics (EIA classes 1,2 & 3), and ii) those made using grain boundary barrier layer (GBBL) technology (EIA class 4 dielectrics).
We also fabricate products using alumina, with 96% or 99.5% purity, based on customer designs.
Ceramic products produced by Tecdia’s Kyoto Technology Center provide ample choices to help designers achieve their dreams.
Dielectric Specifications
| EIA Class |
Tecdia Dielectric Material Code |
K(Nominal) | Dissipation Factor (DF) @25℃ |
Insulation Resistance (IR) @25℃ |
Temperature Characteristics (TC) |
Operating |
|---|---|---|---|---|---|---|
| 1 | 1 | 40 | < 0.15% @1MHz | 106 MΩ | 0 +/-60 ppm/℃ | -55℃ to +125℃ |
| 1 | 4 | 90 | < 0.25% @1MHz | 106 MΩ | -330 +/- 120 ppm/℃ | -55℃ to +125℃ |
| 1 | 5 | 140 | < 0.25% @1MHz | 106 MΩ | -750 +/- 250 ppm/℃ | -55℃ to +125℃ |
| 1 | 6 | 180 | < 0.25% @1MHz | 106 MΩ | -750 +/- 500 ppm/℃ | -55℃ to +125℃ |
| 1 | 7 | 280 | < 0.25% @1MHz | 105 MΩ | -1000 +/- 500 ppm/℃ | -55℃ to +125℃ |
| 2 | A | 700 | < 2.5% @1kHz | 105 MΩ | +/- 10% | -55℃ to +125℃ |
| 2 | F | 1,600 | < 2.5% @1kHz | 105 MΩ | +/- 15% | -55℃ to +125℃ |
| 2 | C | 2,800 | < 2.5% @1kHz | 105 MΩ | +/- 15% | -55℃ to +125℃ |
| 2 | G | 3,400 | < 2.5% @1kHz | 105 MΩ | +/- 22% | -30℃ to +105℃ |
| 3* | D | 4,500 | < 4.0% @1kHz | 105 MΩ | + 22%/-56% | -30℃ to +85℃ |
| 3* | E | 10,000 | < 4.0% @1kHz | 105 MΩ | + 22%/-82% | -30℃ to +85℃ |
| 4 | 10 | 16,000 | < 2.5% @1kHz | 104 MΩ | +/- 22% | -55℃ to +125℃ |
| 4 | 11 | 30,000 | < 2.5% @1kHz | 104 MΩ | +/- 15% | -55℃ to +125℃ |
* Class 3 dielectrics only used for custom products.
Alumina (99.5%) Specifications
| Property | Unit | Measured value |
|---|---|---|
| Alumina Purity* | % | 99.4 (min) |
| Thermal Conductivity | W/m･K | 29 |
| Coefficient of Thermal Expansion | X10-6 /K | 40～300℃…6.9 |
| 40～500℃…7.3 | ||
| 40～800℃…7.8 | ||
| Q Factor | > 10000 | |
| Dielectric Constant Ɛr | 9.8@10GHz | |
| 10.3@1MHz | ||
| Volume Resistivity | Ω・cm | 25℃… > 1014 |
| 300℃… > 1014 | ||
| 500℃… 1013 | ||
| 700℃… 109 |
* We also carry boards made with 96% purity for cost savings. Please contact us for details.
