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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. It's advanatges 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

Surface Potential Measurement

Flexural Strength

Re-Oxidation Endurance

Dicing Observation

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