Special substrates

Besides standard wafers and blanks we produce special substrates based on customer\’s requests. Below are a few examples of these substrates. In case of other requirements, feel free to contact us.

1) Rectangular blanks / wafers

Parameter, orientation	Value
Material	quartz, Q > 1.8 mil.
Cutting angle	43.75° (± 10\’)
Dimensions	50.80 x 12.80 (± 0.13) [mm]
Thickness	965 (± 76) [μm]
Front side	polished SAW, RMS < 0.5 μm
Back side	fine lapped, Ra ~ 0.2 μm

2) Rings

Parameter, orientation	Value
Material	quartz, Q > 1.8 mil.
Cutting angle	X90° (± 1°)
Dimensions ( do / di / thickness )	1) 15.24 / 7.75 / 0.76 mm 2) 20.0 / 11.9 / 1.2 mm 3) 26.6 / 14.3 / 0.8 mm 4) 32.6 / 18.3 / 1.2 mm
Front side	lapped, Ra ~ 1 μm
Back side	lapped, Ra ~ 1 μm

3) Rectangular blanks

Parameter, orientation	Value
Material	quartz, Q > 1.8 mil.
Cutting angle	ZX 0° + 1°50\’ (± 15\’)
Dimensions	38.10 x 38.10 (± 0.05) [mm]
Thickness	400 (± 3) [μm]
Front side	fine lapped, Ra ~ 0.2 μm
Back side	fine lapped, Ra ~ 0.2 μm

Note:
All of the above parameters are only sample specifications.
Differences from standard values and other parameters can be consulted.

Monitors Quarz semiproducts