With our patented AirRay electrode technology we can design and manufacture electrodes according to your actual requirements – in any geometrical shape, with hundreds of contacts, and for numerous applications.

Key Winning Features

High Precision

Ultra-short pulse laser micromachining allows for very small feature sizes of down to 25 µm at highest reproducibility.


Easy Adjustment of Mechanical Properties

Varying the thickness of silicone, parylene-C, or metal layers creates softer or harder electrode structures.


Fast Prototyping

First prototypes can be produced within a day. Functional electrode samples require only one week to be manufactured.


Easy Adaptation of Shape and Functionality

Electrodes can be modified to build 3-dimensional assemblies as well as nerve cuff electrodes to be wrapped around peripheral nerves.
Further adaptions include the integration of microfluidic channels for drug delivery into electrode arrays.



Excellent Electrochemical Properties

Platinum-Iridium or MP35N are used as electrode materials, optionally with high performance coatings for enhanced charge transfer.


High Level of Patient Safety

Mechanical interlocking mechanisms prevent electrode contacts from dislocations and ensure safe contactto neural tissue.


Improved Usability and Reliability

High flexibility in design and great mechanical adaptability make surgical handling significantly easier. Superior reliability maintains full electrode functionality even under recurring loads.

Design Options


Multi-Layer Functionalization

  • Adjustment of thickness and flexibility by number and type of polymer or metal layers
  • Adaptation of contact density and functionality by number and type of metal layers
  • Integration of microfluidic channels and ports


General Dimensions


Silicone electrodes: 0.15 mm – 1 mm

Hybrid silicone-parylene electrodes: 0.08 mm – 1 mm­

Contact size

Silicone electrodes: down to 0.1 mm

Hybrid silicone-parylene electrodes: down to 0.05 mm

Contact spacing

Silicone electrodes: down to 0.3 mm center-to-center

Hybrid silicone-parylene electrodes: down to 0.08 mm center-to-center

Depending on number of contacts

Contact shape: round, rectangular or arbitrary

Design geometry maximum: 90 mm x 90 mm

Various designs for electrode outline incl. slit contours


Design Variation – Cuff Electrodes

Inner diameter: starting from 0.1 mm

Number of contacts: arbitrary

Closing mechanisms:

Split cylinder
Piano hinge

Further closing mechanisms for chronic implantation can be developed


Other Variations

Folding planar AirRay™ electrodes

3D assembly of multiple AirRay™ electrodes

Intrafascicular electrodes

Combination with other technologies:

Depth electrodes

3D metal parts

Functional components such as surgical mesh or suture material




Medical  grade silicone rubber

Long–term (≥ 30 days)

Short–term (< 30 days)



Medical grade metal alloys:

Platinum-Iridium (90/10)



High–performance coatings:

Sputtered Iridium Oxide (SIROF)

Platinum Black

Physical surface modification permits

additional adaptations to the

individual application.


Charge Injection

(Diameter 1mm)

10 Hz     1KHz

(Diameter 2.7 mm)

10 Hz     1 KHz


Max. 0,03 260 kΩ    5 kΩ 32 kΩ     0,6 kΩ

Platinum-Iridium (90/10)

0,09 mC/cm2 47 kΩ     1 kΩ 8 kΩ     0,2 kΩ


0,05 mC/cm2

Sputtered Iridium Oxide (SIROF)

 1 mC/cm2

Platinum Black

0,25 mC/cm2

Related Services

Device design


Tests/validations of new designs incl. technical documentation


Impedance spectroscopy

Characterization of the electrode’s recording performance.


Pulse testing

Characterization of the electrode’s stimulation performance.



We offer ethylene oxide sterilization including peel-pouch or blister packaging in collaboration with external partners. Upon request steam sterilization using sterile pouches is offered as in-house service.


Corrosion testing

Evaluating the corrosion resistance of a particular electrode design for a given stimulation paradigm.


Reliability testing

Common cyclic bending and pull tests under different environmental conditions but also setups tailored to the customer’s needs.

Sales Contact

You are interested in this product? You would like to have a different product configuration?

Contact us:


+49 761 8976 945 20


Through our quality management system, we meet the highest requirements of the applicable standards.

CorTec is DIN EN ISO 13485 certified and has high-class clean rooms.

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All information about our technologies at a glance:

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