Photoimageable thick-film technology

[3] Furthermore, previous work has shown that this technology is capable of realizing the circuit quality necessary for high performance microwave components.

[4] Edge coupled band-pass filters were chosen for this study as they are one of the most common and useful microwave and millimetre-wave planar components.

In multi-layer circuits, the coupling between resonant sections is achieved by overlapping conductors which are separated by a thin dielectric layer.

However, to some extent the problem of fabricating small gaps has been exchanged for that of achieving high alignment between the conductor layers.

The technology allows extremely fine lines and structures to be produced with minimal investment in a simple process and use of special paste materials.