Ground Blocks
Ceramic Ground Blocks are customizable conductive shims ideal for application within micro-assemblies in both optical and microwave industries.
Features
- Customizable size, thickness and metallization layers.
- Low impedance at high frequencies.
- Prevents creep-up of solder and epoxy.
- Orientation recognizable at a glance.
- Good thermal match with alumina substrates.
Uses
- Height matching to reduce length of wire bonds.
- Conductive shims used for creating bonding pads.
Key to Part Numbers
Our ground blocks follow a different part numbering scheme from standard square type. Each part of the PN is structured as follows.
Metal Stacks
The electrode stackup we use for Ground Blocks is as follows.
| Electrode | Metalization |
|---|---|
| Top | Ti – Pt – Au |
| Bottom | Ti – Pt – Au |
Standard Sizes
The following table shows a list of standard sized ground blocks we try to keep in stock for generic applications or initial evaluations.
| Part Number | Size (mils) | Size (mm) |
|---|---|---|
| TGB025013015 | 10 x 5 x 6 | 0.25 x 0.13 x 0.15 |
| TGB025025015 | 10 x 10 x 6 | 0.25 x 0.25 x 0.15 |
| TGB025013025 | 10 x 5 x 10 | 0.25 x 0.13 x 0.25 |
| TGB025025025 | 10 x 10 x 10 | 0.25 x 0.25 x 0.25 |
| TGB050013015 | 20 x 5 x 6 | 0.50 x 0.13 x 0.15 |
| TGB050025015 | 20 x 10 x 6 | 0.50 x 0.25 x 0.15 |
| TGB050050015 | 20 x 20 x 6 | 0.50 x 0.50 x 0.15 |
| TGB050013025 | 20 x 5 x 10 | 0.50 x 0.13 x 0.25 |
| TGB050025025 | 20 x 10 x 10 | 0.50 x 0.25 x 0.25 |
| TGB050050025 | 20 x 20 x 10 | 0.50 x 0.50 x 0.25 |
Dimensions are specified as L x W x H. L x W dimensions have a tolerance of 50 um (2 mils) and H dimension has a tolerance of 25 um (1 mil).
Design Guide
Please contact us for other sizes and metallization schemes.
Note: If you have custom specifications you wish to satisfy then Tecdia can tailor the dimensions, dielectric constant, capacitance, TC and other options to match target capacitance options desired. For immediate assistance just give us a call at 408-748-0100 (USA) or contact us electronically using our contact form, tell us your requirements and we will find you the perfect part for you.
