Substrates / Wafers

STANDARD SIZE OR CUSTOM-MADE

Precise Surfaces and Accurate Orientations

The anisotropic properties of crystals lead to a wide range of applications in research and development. Princeton Scientific offers substrates for thin film application, as targets or custom tailored for individual application with highest quality and very competitive pricing.

Properties

Orientations:

• (100), (001), (111), (110) for cubic and tetragonal crystals
• (0001), (1102), (1120), (1010) for hexagonal crystals

Other orientations with higher Miller index values or vicinal substrates

Orientation accuracy: ± 0.5°, typical < 0.3°, or better on request

Typical sizes:

• 5 mm x 5 mm, 10 mm x 10 mm, 10 mm x 5 mm, 15 mm x 15 mm
• 12,7 mm x 12,7 mm, 20 mm x 20 mm, 25 mm x 25 mm, ø1", ø2"

Lateral tolerances: +0/-0.05 mm

Typical thickness:

• 0.5 mm, 1.0 mm, other thicknesses down to 0.1 mm on request

Vertical tolerance: +/- 0.05 mm, or better on request

Polishing:

• One or both sides epi-polished
• Surface quality: scratch free under magnification 50x
• Micro-Roughness (measured with interferometer microscope)
  (lateral resolution: 0.64 µm, vertical resolution: theor. 0.01 nm)
  Roughness: ( λ_cut off =0.08 mm)
  R_a: < 0.5 nm
  R_q : < 1.0 nm
• R_t : < 2.0 nm
• Certificate of roughness included in each batch

Optical polish on lateral sides (cylinders) on request.

Materials: