SAW Grade Free-pyro Black LN&LT Wafer

Free-pyro black LiNbO3 and LiTaO3  wafers were prepared by chemical reduction. Surface acoustic wave(SAW) devices were fabricated on these black wafers. Performance of SAW devices showed that pyroelelctric charges were reduced due to the higher conductivity of black wafers and near-ultraviolet light absorption was increased. Therefore, the final test yield of SAW devices was increased 5-10%.

Black- LT and Black- LN Special Features

1 ) High ability of electrical charges neutralization. Black-LT and Black-LN wafers shall neutraliza the electrical charges instantaneously even if any electrical potential occur rapidly and slightly.

2 ) Black- LT and Black- LN shall have no difference at piezoelectric properties from usual  LT and LN wafers.

3 ) High uniformity of Bulk resistivity throughout the surface and depth of wafers.

4 ) Bulk resistivity shall be voluntarily controllable at each lever(1.0E+10—9.0E+11Ω *cm)

Typical Specifications

Black-LT wafers

Orientation

Diameter(mm)

Thickness(mm)

Surface Finish

36°Y-cut

42°Y-cut

48°Y-cut

X-112°Y-cut

76.2

100.0

150.0

0.35

0.50

1.00

Single Side Polished(SSP)

Double Sides Polished(DSP)

Black-LN wafers

Orientation

Diameter(mm)

Thickness(mm)

Surface Finish

YZ-cut

41°Y-cut

64°Y-cut

127.86°Y-cut

76.2

100.0

150.0

0.35

0.50

1.00

Single Side Polished(SSP)

Double Sides Polished(DSP)

Other specifications are available on request