What is this platform and what processes does it perform?

This ultra-precision laser micromachining platform integrates picosecond and femtosecond laser sources with multi-axis motion control, enabling non-contact, cold material processing. Ultrashort laser pulses remove material through controlled ablation, minimising thermal effects and preserving material integrity. Simultaneous linear and rotational axes allow access to complex geometries, angled surfaces, and multi-sided components. The modular system design supports customised configurations, ensuring the platform can evolve with changing process requirements while maintaining micron-level accuracy, high throughput, and exceptional process reliability.

What does 1.5 µm / 1 µm positioning accuracy and repeatability mean in practice for precision micromachining?

Positioning accuracy is the maximum deviation between the commanded position and the actual position of the laser focal point, measured across the full travel range of each axis and including all sources of systematic error. Repeatability is the standard deviation of position when the axis returns to the same commanded position multiple times from different directions — it characterises the consistency of successive passes in multi-pass machining, the alignment accuracy of features machined in multiple setups, and the feature-to-feature dimensional consistency across a large array of identical features. At 1.5 µm accuracy and 1 µm repeatability, the platform can position the laser focal spot within 1.5 µm of any programmed coordinate in absolute terms, and return to that coordinate with 1 µm consistency across repeated visits. This translates directly to dimensional tolerances of ±1 µm or better on machined features — the specification required for precision optical components, MEMS device geometries, watchmaking micro-gears, and photonic crystal lattice structures where feature position and dimensional tolerances are measured in single micrometres.

Ultrafast Picosecond and Femtosecond Laser Processing for Cold Ablation

Ultrashort picosecond and femtosecond laser pulses enable cold ablation — controlled material removal with virtually no heat-affected zone, no recast layer, and no microcracking in the surrounding material. Cold ablation is achieved because USP pulse durations are shorter than the electron-phonon coupling time of most solid materials, meaning ablation is complete before significant heat diffusion into the surrounding zone occurs. This mechanism is the enabling requirement for achieving the feature edge quality, dimensional accuracy, and material integrity specifications of the most demanding precision micromachining applications in the platform’s target industries — from the fatigue-life-critical edge quality of medical device stent struts to the optical-quality surface roughness of photonic waveguide facets and the tribologically critical surface texture of precision gear tooth flanks.

1.5 µm / 5 arcsec Positioning Accuracy — Highest in the GFH Range

The Multi-Axis Platform achieves 1.5 µm positioning accuracy on linear axes and 5 arcsec accuracy on rotary axes — the highest accuracy specification in the GFH GmbH platform range available through United Spectrum Instruments. This sub-2 µm linear accuracy is the specification required for applications including photonic waveguide lattice definition (where feature position determines coupling coefficients), precision gear tooth geometry (where pitch errors measured in micrometres translate to transmission error and noise), MEMS actuator gap definition (where sub-micron gap width determines electrostatic force and resonance frequency), and precision optics structuring (where feature position relative to the optical axis determines diffraction efficiency). The 1.5 µm accuracy specification is achieved through direct-drive linear stages on a 3700 kg precision machine base with inherent vibration damping and thermal stability.

1 µm / 2 arcsec Repeatability for Multi-Pass and Sequential Machining

The platform achieves 1 µm repeatability on linear axes and 2 arcsec on rotary axes — ensuring that successive passes in multi-pass volume removal machining, sequential machining of the same feature in multiple setups, and repeated return to reference positions within a complex machining sequence all maintain sub-2 µm relative positioning consistency. One-micrometre repeatability is the specification that enables volume material removal by laser ablation to achieve the geometric accuracy and surface flatness required for precision mould insert machining, deep engraving of injection mould cavities, and multi-layer thin-film patterning where the laser must re-register to previously machined features with sub-micron overlay accuracy. It is also what enables the rotary axis to be used for cylindrical component machining with the angular position consistency needed for high-precision gear and bearing surface processing.

Simultaneous Multi-Axis Motion for Complex 3D Geometries

Simultaneous linear and rotational axes enable laser machining of complex 3D geometries, angled surfaces, multi-sided components, and cylindrical structures through synchronised multi-axis interpolation. The platform’s ability to simultaneously interpolate linear and rotary axes allows the laser focal point to follow arbitrary 3D paths relative to the workpiece surface — tracing spiral features on cylindrical rollers, maintaining surface-normal incidence on curved aerofoil surfaces during cooling hole drilling, writing curved waveguide paths in optical glass, and machining multi-sided micro-prismatic structures without manual component repositioning between faces. This simultaneous multi-axis capability transforms the platform from a 2D laser machining tool into a true 3D precision micromachining centre.

Modular Scalable Architecture for Evolving Process Requirements

The platform’s modular architecture allows application-specific hardware modules — laser sources, focusing optics, galvo scanners, axis configurations, automation interfaces, and inspection systems — to be integrated at time of purchase and expanded as requirements evolve. This modularity is a fundamental commercial and technical advantage: the precision machine base, direct-drive stages, and CNC controller — the highest-value and longest-lived components of the system — are protected across multiple application generations, while new process modules are added as the customer’s microfabrication capabilities expand. For a research institution that begins with the platform configured for material science research and later expands to photonic device prototyping, or for a manufacturer that adds cylindrical component capability to an initially flat-substrate configuration, modular expansion avoids the cost and re-qualification effort of platform replacement.

Medical Device Manufacturing

Supports micro-stent strut and drug elution hole fabrication in nitinol and stainless steel with sub-5 µm dimensional tolerances; catheter tip and body hole drilling for fluid control and drug delivery port definition; implant surface micro-topography structuring for osseointegration promotion; precision machining of surgical instrument cutting edges, jaws, and locking mechanisms; and micro-needle array fabrication on silicon and polymer substrates. Medical device micromachining demands the combination of cold ablation quality (no recast layer, no microcracking at nitinol stent strut edges that would initiate fatigue fracture) and dimensional accuracy (sub-5 µm stent strut width and strut-to-strut gap consistency) that the Multi-Axis Platform’s 1.5 µm accuracy and femtosecond cold ablation deliver — capabilities that ISO 13485 medical device quality management systems require to be process-validated and production-qualified.

Electronics, Semiconductor, and MEMS

Enables silicon and compound semiconductor wafer scribing and dicing; micro-via drilling in advanced HDI PCBs and semiconductor interposers; MEMS device structuring including micro-actuator gap definition, resonator mass trimming, and electrostatic comb drive geometry control; photonic device fabrication including waveguide definition, coupler structuring, and photodetector active region patterning; and thin-film electrode and circuit layer processing. MEMS device fabrication is an application where the Multi-Axis Platform’s 1 µm repeatability is a directly enabling specification — electrostatic gap widths in MEMS accelerometers, gyroscopes, and resonators are commonly in the 2–10 µm range, and the resonance frequency and sensitivity of these devices depend directly on gap width accuracy. One-micrometre repeatability ensures that gap dimensions are defined consistently across all devices in a production batch.

Aerospace and Turbomachinery

Used for film cooling hole drilling in nickel superalloy turbine blades and combustor liners at defined angles with controlled taper through 5-axis simultaneous trepanning; thermal barrier coating selective ablation for bond coat inspection and localised repair; microstructuring of combustor inner liner surfaces for improved flame stability and emissions control; sealing surface texturing for controlled leakage in turbine labyrinth seals; and lightweight CFRP structural component micro-feature fabrication. The Multi-Axis Platform’s 5-axis simultaneous motion is the enabling capability for turbine blade cooling hole drilling — maintaining the drill axis perpendicular to the curved aerofoil surface throughout the drilling cycle requires real-time A and C rotary axis interpolation with the X, Y, Z linear axes, achievable only through true simultaneous multi-axis CNC interpolation of the type the platform provides.

Precision Optics and Photonics

Ideal for waveguide writing and structuring in optical glass and crystal substrates for integrated photonic circuit fabrication; diffractive optical element (DOE) surface relief structure fabrication; precision free-form optics surface microstructuring for diffusion and beam shaping control; photonic crystal hole array fabrication in silicon, GaAs, and optical glass substrates; and photonic integrated circuit (PIC) wafer dicing and facet preparation. Photonic crystal fabrication requires periodic hole arrays with lattice constants of 200–1000 nm and hole diameter tolerances of tens of nanometres — approaching the limit of what laser ablation can achieve, and requiring the 1.5 µm accuracy of the Multi-Axis Platform to place each hole at the correct lattice position within the specified tolerance across the full photonic crystal area.

Automotive and E-Mobility

Supports lithium-ion battery electrode foil cutting and patterning without delamination or burring; fuel injector nozzle micro-orifice drilling at defined spray angles for emissions-optimised fuel atomisation; sensor housing micro-feature machining for automotive MEMS and LIDAR sensor components; EV motor lamination micro-slot definition for reduced eddy current losses; and automotive connector and busbar copper foil trimming with sub-50 µm dimensional tolerances. Battery electrode foil processing — cutting copper and aluminium current collectors with precisely defined tab geometries and clean cut edges — is an application of growing importance as India’s EV manufacturing sector scales, and the Multi-Axis Platform’s cold ablation and sub-2 µm feature accuracy enable the electrode edge quality that supports next-generation high-energy-density cell designs.

Watchmaking and Precision Micro-Tooling

Enables high-precision micro-gear, pinion, and axle machining in hardened tool steel and titanium alloys with the single-micrometre dimensional tolerances required for watch escapement performance; bearing jewel hole drilling in synthetic ruby and sapphire with sub-5 µm diameter and cylindricity tolerances; decorative engraving of watch dials, cases, and bracelets in precious metals and ceramics; and fabrication of precision micro-tools including miniature end mills, drill bits, and embossing dies. Watch gear and escapement machining represents one of the most demanding precision laser micromachining applications in terms of dimensional tolerance — gear pitch errors of even 5 µm translate to visible timekeeping variation in a mechanical watch — making the Multi-Axis Platform’s 1 µm repeatability the specification that enables precision watch component laser machining at the quality level demanded by Swiss and high-end watchmaking standards.

Research and Development

The Multi-Axis Platform is the preferred choice for research institutions requiring the highest precision for experimental microfabrication — university photonics groups writing waveguide circuits in novel glass compositions, MEMS research groups fabricating test structures at the limits of laser-achievable dimensional tolerance, materials science groups studying laser-surface interaction at controlled sub-micron fluence gradients, microfluidics researchers defining sub-10 µm channel geometries in glass chips, and hybrid fabrication research combining laser structuring with deposition or self-assembly processes. Its modular architecture allows research groups to configure the platform for their current primary application and expand capability as research directions evolve — without replacing the precision machine base that provides the accuracy foundation for all experimental work.