Resources

Femtum’s laser trimming platform enables permanent, low-loss phase correction at the wafer level, improving PIC yield, reducing power consumption, and unlocking scalable photonic manufacturing.

Rising PIC complexity is creating a critical yield challenge in photonics manufacturing. Learn how Femtum’s laser trimming technology permanently corrects nanometric errors, boosts wafer-level yield, and removes the reliance on power-hungry thermal tuning, paving the way for scalable, high-performance photonic circuits.

CO₂ snow cleaning has earned its reputation as a dependable particle remover. It’s fast and dry. No solvents, no rinsing, no drying cycles. Perfect for dust, die saw debris, and some loose organics.
Mid-IR Laser cleaning is different. It is a more precise, targeted solution built for the demands of modern PICs s. Unlike traditional cleaning methods, Mid-IR laser cleaning is based on selectivity at the molecular level. Instead of treating every surface the same, it discriminates based on the optical absorption of the contaminant.

Photonic Trimming is the operation of changing the phase of optical paths in photonic integrated circuits (PICs). This process recenters the PIC performance to the target or designed value.

FEMTUM has developed a non-contact laser process to perform post-fabrication phase correction of defective PICs, turning known bad dies into known good dies. The process is very fast, with a duration in the milliseconds range, and very well controlled. The laser and optical head are designed to be simply integrated into current semiconductor tools.

Plasma systems are widely adopted in the industry because they are applicable to a broad range of materials, they can process large batches, they are inherently dry, necessitate vacuum and they can operate in cleanrooms. Mid-IR laser cleaning works differently than plasma cleaning, especially at 2.8µm. Short-pulsed lasers are ideal for high-precision applications: they spatio-temporally limit heat diffusion in the substrate resulting in a very small or quasi-absent heat-affected zone.