COILVOXEL - MICRO-COILS
Voxalytic GmbH offers solenoidal on-chip coil solutions with very high accuracy. CoilVoxel™ solutions offer a wide range of design parameters, rendering them suited for diverse applications such as RF, RFID, antennas, scientific instrumentation, microelectronic circuits and many more.
The smallest CoilVoxel™ has a diameter of merely 200 µm. Our unique coil winding technology enables us to realize truly 3D solenoidal CoilVoxel™ chips with high winding density and high degree of flexibility in terms of number of turns and winding layers on plastic (solid or hollow post) or magnetic of almost any shape. CoilVoxel™ comes with its long axis perpendicular to the substrate which makes it excellent choice for many applications. Copper CoilVoxel™ solenoids provide customers with high Q-factor micro solenoids while Gold CoilVoxel™ chips are available for bio-compatible applications.
HOW IT WORKS
Flexibility and Precision
CoilVoxel™ solenoids are fabricated using standard IC technology on posts made of either magnetic material or from polymers. The design of the posts can be varied in terms of diameter, shape and aspect ratio (i.e. height). Our proprietary coil winding technology enables us to create highly accurate and reproducible coils according to specifications.
Besides classical shapes we may also manufacture more complex designs (see picture below) for specific applications such as low parasitic NMR probes or RF probes, etc.
Our coils can be delivered as stand-alone chips or embedded directly into customized designs.
KEY CHARACTERISTICS & METRICS
CoilVoxel™ are available in two main categories of cores with distinct key electrical characteristics
COILS WITH MAGNETIC CORE
Range of application: 0.3 – 100 MHz
Coil diameter: 0.8 – 4 mm
Coil height: 0.8 – 3 mm
Serial inductance: 0.1 – 40 µH
Resonance frequency: 1 MHz ˂ f ˂ 300 MHz
Peak Q-factor: 19
Power handling: ≤ 300 mA
Maximum L/Rdc : 5700 nH/Ω
COILS WITH PLASTIC CORE
Range of application: 30 – 300 MHz
Coil diameter: 0.2 – 4 mm
Coil height: 0.1 – 1.5 mm
Serial inductance: 0.04 – 1 µH
Resonance frequency: 50 MHz ˂ f ˂ 1 GHz
Peak Q-factor: 65
Power handling: ≤ 300 mA
Maximum L/Rdc : 200 nH/Ω
CoilVoxel™ is aimed at customers who need high quality micro solenoids within the smallest possible form factor.
The application area includes:
Micro energy harvesting devices.
Light weight miniaturized electronic circuits
Below figures show the characteristics of a 10 turns solenoidal coil on geometrically similar polymer posts with 1 mm diameter. Each post contains a certain percentage of magnetic powder (0%, 45%, 55%, 65% magnetic powder). This is an indication of the flexibility of our production processes.