| 1980s |
Developed
as a host crystal
for laser radiation
in Russia |
| Late
1990s |
Noticed
as a promising
piezoelectric
crystal for
SAW devices |
| Jul.
1998 |
Introduction
of technological
know-how from
Russia |
| Dec.
1998 |
Succeeded
in growing
3-inch Z-axis
single crystal |
| Jun.
1999 |
Start
of sales of
domestic grown
samples |
| Feb.
2000 |
Start
of development
of IF filters
for W-CDMA
base stations
in SAWTEK (Demanded
quality of
wafer was satisfied.) |
| Aug.
2000 |
Start
of development
of 4 inch crystal |
| Dec.
2000 |
Succeeded
in growing
4-inch
Z-axis
and Y-54
single
crystal |
| Mar.
2001 |
Samples
almost
satisfied
the specifications
for W-CDMA
base stations |
| Apr.
2001 |
Start
of designing
PCB for mounting
(Mitsubishi
and base station
maker) |
| Jun.
2001 |
Start
of sales of
4-inch wafers |
| Sep.
2001 |
Evaluation
of 4-inch wafer
for mass-production
(SAWTEK) |
| Oct.
2001 |
Start
of testing
SAW-filter
mounted system |
| Jan.
2002 |
Formal
adoption
as IF filter
for W-CDMA
base stations |
| Apr.
2002 |
Start
of Mass-production
shipment |
| Y54:
direction
almost
perpendicular
to the
slicing
plane of
wafers |
