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美国Gaertner激光型椭偏仪,STOKES Ellipsometer

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Gaertner LSE-2A2W 激光型椭偏仪

LSE-2A2W Ellipsometer specifications

Alignment:

Tilt and table height using computer alignment screen.

Incidence Angles:

fixed at 60° for 544nm laser and 70°for 633nm  laser

Method of Measurement:

Advanced StokesMeter determines the complete measuring beam  polarization using no moving parts and no modulators, only 4 stationary  silicon detectors so measurements are stable and exact.

Measurement Time:

Partically instantanious

Measuring Laser:

544 & 633 nm HeNe Gas Lasers with 1 mm measuring beam diameter

Alignment Laser:

670nm Laser Diode

Sample (Wafer) Size:

300  mm wide X unlimited length

Stage:

Hand positioning with tilt and table height adjustment.

Software:

Windows LGEMP4  layer absorbing included.

Required Computer:

(not included) Windows PC or laptop with USB port

Film Thickness Range:

0 - 60,000 Angstroms on substrate or on 1, 2, 3, or 4 known  sublayers.

Precision, Repeatability:

Sub-Angstrom over most of the measurement range.

Refractive Index:

± .001 over most of the measurement range.

Power:

Supplied by computer USB bus and laser power supplies.

Dimensions:

Height: 16.5 Width: 27.5 Depth: 16  inches
 Net Weight: 45 lbs.  Shipping Weight: 65 lbs.

CDRH Compliance:

All laser ellipsometers supplied by Gaertner comply with CDRH  requirements 21CFR 1040 for a Class II laser product emitting less than 1 mW  or Class IIIb less than 5 mW of low power radiation. As with any bright  source such as the sun or arc lamp, the operator 首ld not stare directly  into the laser beam or into its reflection from highly reflecting surfaces.

CE Compliance:

Comply with European safety directives and carry the CE mark.




Model LSE Ellipsometer


Manufactured by Gaertner Scientific, USA






Stokes Ellipsometer LSE Description
The Stokes Ellipsometer LSE is a continuation of an entirely new line of ellipsometers based on the advanced StokesMeter technology - winner of Photonics Spectra and R&D 100 best new products awards.
The LSE model ellipsometer includes data acquisition and analysis software. An optionalWindows based computer with PCI interface is available.
Thisellipsometer uses patented StokesMeter technology with no moving parts and no modulators to quickly and accurately determine the complete polarization state of the 6328 laser measuring beam at a 70° incidence angle. The space-saving design features a small footprint yet it can accommodate large samples up to 300mm wide. The sample stage can be easily moved by hand to measure any point on the sample surface. The sample table includes a manual tilt and table height adjustment which is set using an alignment screen on the computer.
The data acquisition and analysis software, LGEMP, can measure the top layer film thickness and film refractive index on a substrate or on 1, 2, or 3 known bottom layers. The films can be transparent or absorbing. This durable integration of hardware and software is fast and easy to use.
Extremely precise, stable and low cost the model LSE Stokes Ellipsometer represents an excellent value in a basic ellipsometer.
Description of Stokesmeter Technology
This patented device uses no moving parts and no modulators to quickly and accurately determine the complete polarization state of the measuring beam.


The diagram above shows the StokesMeter photopolarimeter for the simultaneous measurement of all four Stokes parameters of light. The light beam, the state of polarization of which is to be determined, strikes, at oblique angles of incidence, three photodetector surfaces in succession, each of which is partially spectrally reflecting and each of which generates an electrical signal proportional to the fraction of the radiation it absorbs. A fourth photodetector is substantially totally light absorptive and detects the remainder of the light. The four outputs thus developed form a 4x1 signal vector I which is linearly related, I=AS, to the input Stokes vector S. Consequently, S is obtained by S=A(-1)I. The 4x4 instrument matrix A must be nonsingular, which requires that the planes of incidence for the first three detector surfaces are all different. For a given arrangement of four detectors, A can either be computed or determined by calibration.
Technological Advantage
The clean, compact StokesMeter replaces a typical rotating analyzer assembly consisting of a drum, prism, encoders, switches, motor and detector and their associated electronics. In addition, the waveplate mechanism on the polarizer arm, is eliminated. This results in a fast, precise, stable no moving parts ellipsometer.
An outstanding feature is the Stokes Ellipsometer's compensation for small changes in angular beam deviation caused by sample out-of-flatness. This permits fast, uninterrupted measurement over the entire wafer surface without the need to pause to correct for focus and tilt. When scanning similar samples, tilt-free, focus-free operation is the obvious benefit.

LSE Ellipsometer specifications

Alignment: Tilt and table height on computer alignment screen.
Incidence Angle: 70°
Method of Measurement: Patented StokesMeter determines the complete beam polarization using no moving parts and no modulators, only 4 stationary silicon detectors so measurements are exact and stable.
Measurement Time: Practically instantaneous.
Light Source: 6328 HeNe Laser
Beam Diameter: 1 mm
Sample (Wafer) Size: 300 mm wide X unlimited length
Stages: Hand positioning with tilt and table height adjustment.
Software: Windows 2000/XP LGEMP4 layer absorbing.
Computer: Windows 2000/XP PC with available PCI slot (option)
Film Thickness Range: 0 - 60,000 Angstroms on substrate or on 1, 2, 3, or 4 known sub-layers.
Precision & Repeatability: Sub-Angstrom over most of the measurement range.
Refractive Index: ± .001 over most of the measurement range.
Power: Supplied by computer interface cardand laser power supply.
Dimensions: Height: 16.5 Width: 27.5 Depth: 16 inches
Net Weight: 40 lbs. Shipping Weight: 65 lbs.
CDRH Compliance: All laser ellipsometers supplied by Gaertner comply with CDRH requirements 21CFR 1040 for a Class II laser product emitting less than 1 milliwatt of low power radiation. As with any bright source such as the sun or arc lamp, the operator 首ld not stare directly into the laser beam or into its reflection from highly reflecting surfaces.
CE Compliance: S series Ellipsometers comply with European safety directives and carry the CE mark.


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