PI's P-733 piezo stage hits 0.1 nm resolution for AFM and wafer metrology

Physik Instrumente (PI) has released the P-733 XYZ piezo nanopositioning stage, delivering 0.1 nm (1 Å) positioning resolution for atomic force microscopy, super-resolution microscopy, surface nanometrology, and advanced imaging. The flexure-guided platform pairs frictionless motion with high-accuracy capacitive position feedback, which PI says produces "highly repeatable motion" at the sub-nanometer level.

Travel ranges reach 100 × 100 µm in X and Y and 10 µm in Z, wide enough to cover large sample areas without repositioning. A 50 × 50 mm clear aperture runs through the center of the stage, leaving room for transmitted-light microscopy setups underneath the sample. Engineers doing wafer or mask metrology will care about that aperture figure specifically. It lets the stage slot into an existing optical path rather than forcing a redesign around it.

For applications that need faster scanning, PI also offers the P-733.3DD direct-drive version. It trades travel range, down to 30 × 30 × 10 µm, for speed, with resonant frequencies exceeding 1 kHz and the same 0.1 nm resolution. Both versions use parallel kinematics and parallel metrology, meaning every axis is measured against a single fixed reference rather than independently. That architecture lets the controller actively compensate for crosstalk between axes during high-speed scans.

The mechanics are built to avoid wear over time. Zero-play flexure guides eliminate friction and backlash, and PICMA multilayer piezo actuators are ceramic-insulated, which PI says extends actuator lifetime up to 10 times beyond polymer-insulated designs and has held up past 100 billion cycles without failure. Noncontact capacitive sensors add long-term stability, with PI rating typical linearity at 99.97 percent.

PI positions the P-733 for uses beyond microscopy, including nanoimprinting, micromanipulation, and image stabilization, and offers ultra-high-vacuum-compatible and nonmagnetic configurations on request. Each mechanical unit stores its servo and linearization parameters on an ID chip built into its D-sub connector, so swapping a controller triggers an automatic recalibration instead of a manual setup process.