2MAFx – Series

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Type 2MAFx family of structures are fabricated by ACST Film-Diode (FD) Process. FD-Structures are implemented on a transferred membraneSubstrate, which is just few µm thin and of a low dielectric constant insulator. This allows for a drastic reduction of structure parasitic and, therefore, aims at ultimate performance at MM/SubMM-Waves. Opticallytransparent membrane-substrate allows for accurate positioning for diode mounting/assembly.
The 2MAFx structure represents two anti-parallel Schottky diodes, optimised for operation in varistor mode.

Application Areas:

  • Sub-Harmonically-Pumped Frequency Mixers
  • Wideband Frequency Multipliers

Product Features:

  • Strongly Reduced Shunt (pad-to-pad) Capacitance
  • Low Junction Capacitance
  • Low RF Series Resistance
  • Suitable for Flip-Chip Mounting Approach
  • Structure Geometry Optimised for Sub/MM-Waves Applications

Available Configurations

Structure Type Nominal Parameters
Short Structure Description
Junction Capacitance Cj0 (fF/anode) Total Capacitance
Ctot (fF)
Series Resistance Rs/Differential Resistance Rdiff (Ω) Breakdown Voltage Ubd (V)
2MAF1.0 1.0 5.5 18  – Two varistors in anti-parallel configuration on 5 µm thick transferred membrane-substrate for ultimate MM/Sub-MM wave performance.
2MAF1.5 1.5 6.5 15  –
2MAF2.3 2.3 8.0 14  –
 –   –  –   –   –

Diode parameters are usually determined for each batch individually and may vary within up to 20% from nominal values. For large ordering quantities customer specifications can be considered. Please ask on availability before ordering.

ACST reserve the right to change the information presented here without notice.

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