FRT CWL HR - High Resolution Chromatic Sensor

Due to its IR-SLD light source and a specially modified optical setup, the FRT CWL HR delivers the highest lateral resolution and the smallest measuring spot of all CWL sensors. It works by the principle of chromatic aberration. This non-destructive method works equally reliable on surfaces with high and low reflectivity. The CWL HR is used for the characterization of structure sizes in the lateral micrometer and vertical sub-micrometer range. Typical applications are found in the semiconductor, MEMS and nanotechnology industries.



FRT CWL HR - High Resolution Chromatic Sensor 



Measuring Features
   
  • Optical, non-contact, non-destructive measurement
  • Sub-µm lateral resolution, very small measuring spot
  • High numerical aperture for the measurement of steep flanks
  • Small, robust, wear-free measuring head

 


Typical Applications
 
  • 2D profile measurement
  • 3D topography measurement
  • Flank measurement
  • Structure measurement
  • Point measurement
  • fast measurement of profile and topography even on very sensitive surfaces
  • measurement of fine structures in micro- and nanotechnology
  • measurement of thin transparent films
  • measurement of step heights, distances or angles in the field of electronics and semiconductors
  • evaluation of geometries in micro injection molding
  • surface characterization in medical technology and life sciences




Technical Specifications
 
Measuring Range z 100 µm
Working distance

 

6.5 mm
Resolution z 10 nm
Resolution x,y

 

0.7 µm
Numerical aperture

 

0.66
Measuring angle

 

90° ± 40 °
Sensor electronics CWL HR
Measuring rate

 

4.000 measurements / sec.
(4 kHz)

 

Light source

 

IR superluminescence diode
Repeatability

 

< 0,0002 x measuring range

 

Measuring accuracy

 

< 0,00033 x measuring range+ 0,001 x measuring height

 

Calibration tables

 

16

 

Operating temperature

 

+ 5° C to + 50° C

 

Dimensions (W x H x D)

 

260 mm x 115 mm x 310 mm

 

 
Scope of Delivery
Measuring head, optical fiber, sensor electronics, operating manual