Piezo Grade Quartz Wafer
Besides the applications as waveplates for optical polarization transformation, quartz crystal is widely used in frequency control applications due to its fundamental properties including high purity, high Q, low thermal expansion, excellent stability, unique electrical characteristic and low cost. Especially, a device employing quartz as a resonator has risen rapidly due to the development in the mobile telecommunications fields.
Specifications
Material | Piezo Grade Quartz crystal | |||
Cutting Angle | X/Y/Z/AT32、33、36/BT/ST42.75°-cut etc | |||
Diameter/size | 3”(76.2mm) | 4” （100mm) | 6″(150mm) | 8″(200mm) |
Tol(±) | <0.20 mm | |||
Thinnest Thickness | 0.08mm Min | 0.10mm Min | 0.20mm Min | 0.35mm or more |
Primary Flat | 22mm | 32mm | 42.5mm | 57.5mm |
LTV (5mmx5mm) | <1µm | |||
TTV | <3µm | |||
Bow | -30<bow<30 | |||
Warp | <40µm | |||
PLTV(<0.5um) | ≥95%(5mm*5mm) | |||
Orientation Flat | All available | |||
Surface Type | Single Side Polished /Double Sides Polished | |||
Polished side Ra | <0.5nm | |||
Back Side Criteria | General is 0.2-0.5µm or as customized | |||
Edge Criteria | R=0.2mm or Bullnose | |||
Material Property | ECD | Better than grade 4 | ||
Inclusion | Better than grade II | |||
Q-Value | Better than grade C | |||
Wafer Surface Criteria | Particles ￠>0.3 µ m | <= 30 | ||
Scratch , Chipping | None | |||
Defect | No edge cracks, scratches, saw marks, stains | |||
Packaging | Qty/Wafer box | 25pcs per box | ||