Standard Whisker-Contacted
Schottky-Diodes
NMRC offers a range of millimeter and sub-millimeter wave Schottky
Barrier Diode chips for Multiplier and Mixer applications to meet
customer specifications. More complex Schottky structures including
discrete microwave transistors and small scale integrated circuits
are also available to special order.
Manufactured on in-house
MOVPE crystal growth technology and fabrication,
the diodes have been supplied to many customers including the
European Space Agency for over twenty years.
Varistor and Varactor diodes are supplied with anodes as small
as 0.5µm in standard 100µm×100µm square shapes
with thickness of 80µm to 100µm. Au/SnNi/Au ohmic contacts
are metallised on the back of the diodes. Side ohmic contacts
(notch front diodes) are also available. The standard
anode metallisation is electroplated Pt/Au which gives the best
combination of ideality, cryogenic compatibility and low noise
performance.
NMRC is currently developing "beam lead" or "planar"
Schottky barrier diodes where the whisker contact is made redundant
with an easier to use assembly bonding process.
