KKPCB LTCC substrates with silver conductor material provide multilayer substrates with low dielectric loss. Coils, capacitors and resistors can be embedded in the inner layer. Ideal for high-frequency modules and silicon wafer interposer substrates.
Features
KKPCB LTCC substrates can embed coils, capacitors and resistors, thereby reducing the substrate size. Excellent dimensional tolerance of ±0.3% improves mounting accuracy. Low conductor loss is achieved by using Ag conductor material. Electroless Ni/Au or Electroless Ni/Pd/Au can be selected for surface treatment.
Material Characteristics
| ITEM | UNIT | TEST CONDITIONS | NL-Ag3 |
|---|---|---|---|
| COLOR | ― | ― | WHITE |
| DENSITY | g/cm3 | ― | 2.85 |
| BENDING STRENGTH | MPa | ― | 250 |
| THERMAL EXPANSION | 10-6/℃ | RT～350℃ | 5.5 |
| THERMAL CONDUCTIVIT | W/(m・K) | ― | 3.5 |
| DIELECTRIC | ― | 2.3GHz | 7.1 |
| LOSS TANGENT | % | 2.3GHz | 0.3 |
Values are typical values
Design Guidelines
| ITEM | UNIT | STANDARD | CUSTOM | |
|---|---|---|---|---|
| DIMENSIONS | inch | 2～4 | ー | |
| TOLERANCE | % | ±0.35 | ー | |
| THICKNESS TOLERANCE | % | ±10 | ー | |
| # OF LAYERS | Layer | 2～ | ー | |
| VIA DIAMETER | mm | 0.15, 0.2 | 0.1 | 0.085 |
| VIA PAD DIAMETER | mm | VIA DIAMETER +0.15 | VIA DIAMETER +0.1 | VIA DIAMETER +0.05 |
| VIA PICTH | mm | 0.5 | 0.35 | 0.25 |
| LINE/SPACE | mm | 0.1/0.1, 0.15/0.15 | 0.075/0.075 | |
| LINE/VIA PAD DISTANCE | mm | 0.2 | 0.1 | |
| VIA EDGE/SUBSTRATE EDGE DISTANCE |
mm | 0.5 | 0.25 | |
| LINE/SUBSTRATE EDGE DISTANCE | mm | 0.3 | 0.15 | |
| CAVITY WALL WIDTH | mm | ≧0.5 | 0.35 | |
| CAVITY DEPTH | mm | LESS THAN 2/3 OF TOTAL THICKNESS | ー | |
| CAVITY CORNER R | mm | 0.15, 0.2 | 0.1 | |
| CAVITY BOTTOM THICKNESS |
mm | ≧0.3 | ー | |
Product application scenarios
- High-Frequency application substrates (Front-end modules, Sensor substrates)
- Substrates for small package devices
- Silicon wafer interposer substrates
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