The dice and fill method is the industry standard for composites with frequencies over 1 MHz. These composites are made by dicing a piezoceramic plate and filling the resulting trenches with an interstitial material such as epoxy or polymer. The distance between the pixels or rods is minimized to avoid lateral modes or other undesirable interference. The outcome is a regular pixel distribution required for phased array ultrasound transducers.
| Pixel Size/Fill |
Navy Type II Frequency*
|
| 400µm/65% | 1 to 2 MHz |
| 200µm/45% | 1.5 to 5 MHz |
| 200µm/65% | 1.5 to 5 MHz |
| 100µm/45% | 3.5 to 10 MHz |
| 100µm/65% | 3.5 to 10 MHz |
