Lithium Tantalate - High Physical Strength

High physical strength (so-called Yellow ) Lithium Tantalate has been developed, to give a higher process yield in production. This has now been combined with the electrical properties of the black product to provide a Yellow-Black product for the SAW components industry, giving superior yield while limiting pyro electric effects. Advantages are:

  • High physical strength allows bending and dicing, which can produce better process yield, thinner wafers and miniturization
  • Endurance against high temperature
  • Unaffected by pyro electricity

Lithium Tantalate Wafers - Performance Summary

Normal Standard Black Super Black Yellow Yellow Black
Colour
White
Grey
Dark Grey
Yellow
Dark Yellow
Flexural Strength
Same
Slightly worse
Much much better
Much much better
3 Point Bending Test (N)
14~23
13~20
9~15
25~
25~
Static Electricity Prevention
Much much better
Much much better
Slightly better
Much much better
Bulk Resistivity Ω cm
E+14~15
1~5E+11
4~1E+10
4.5E+13
0.5E~5E+11

Surface Potential (kv)

10-85°C

4.5
~0.3
~0.2
3.5
~0.2
Dicing
Better
Better
Much much better
Much much better
Curie temperature; Tc °C
603
603
603
603.5
603.5

Endurance against high temperature

Better
Much much better
Much much better

Comparisons

Response to Pyro Electric Effect - Hot Plate 94°C, wafer 20° to 85°C  
Applying 3-ponts bending test  
Hotplate 300°C One hour  
Cutting Speed : 10.0 mm/second