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  • Simultaneous evaluation of film thickness and composition
  • Applicable to all film types
  • Accepts 200 mm and smaller wafers and media disks
  • Capable of high analytical performance, accuracy, and stability
  • Patented "diffraction avoidance" capability for accurate XRF results
  • High-sensitivity Boron analysis (with AD-Boron channel)
  • Available auto-calibration function with the optional C-to-C auto loader previously only found on the WaferX 300
  • Oil-free transformer X-ray generator
  • Electric consumption reduced 23% from previous model

Simultaneous WDXRF spectrometer

Film thickness and composition measurements on wafers and media disks

The WDA-3650 X-ray fluorescence spectrometer for thin film evaluation continues Rigaku's 30-year history of XRF wafer analyzers that has mirrored the history of thin film device development. This latest XRF metrology tool contributes significantly to the process control of metal film thickness, film composition, and element concentration with new functions and a low-COO design.

XRF tool for 200mm wafers

A versatile and reliable tool for 200 mm and smaller wafers, the WDA-3650 incorporates our trademark X-Y-θ sample stage system for superior results on difficult measurements, such as ferrodielectric films. Multiple channels enable simultaneous measurement of multiple elements of interest for high throughput. The high energy resolution of this wavelength-dispersive XRF system, compared to energy-dispersive XRF systems, is especially useful to minimize peak overlap when element peaks are closely spaced.

Superior boron (B) measurement

For boron applications, the available AD-Boron channel provides 5-times greater sensitivity than previous models. The AutoCal function and built-in internal wafer stocker, previously only available on 300mm tools, enable fully-automated daily tool qualification and intensity calibration.

Compact efficient design

The WDA-3650 is extremely compact with the basic unit requiring less than 1 m2 of valuable cleanroom space, and there is no need for side maintenance service access. Power consumption has been reduced more than 20% compared to the previous model.


Product name WDA-3650
Technique Simultaneous wavelength dispersive X-ray fluorescence
Benefit Thickness and composition of multi-layer stacks for ≤ 200 mm wafers
Technology 4kW, Rh-anode WDXRF with XYθ sample stage
Core attributes 20 channels max., fixed type (₄Be ~₉₂U), scanning type (₂₂Ti ~₉₂U), CE marked, GEM/SECS, SEMI S2
Core options AD-Boron channel for greater sensitivity, auto-calibration function with C-to-C auto loader
Computer Internal PC, MS Windows® OS
Core dimensions 1120 (W) x 1450 (H) x 890 (D) mm
Mass 600 kg (core unit)
Power requirements 3Ø, 200 VAC 50/60 Hz, 30 A or 1Ø, 220-230 VAC 50/60 Hz 40 A