Products Category

Quartz

Quartz crystal is a kind of piezoelectric crystal. The piezoelectric effect of quartz crystal is used to realize frequency control, stability or selection. The electronic components made include quartz crystal resonators, quartz crystal oscillators and quartz crystal filters. Mainly used in communications, home appliances, automobiles and other various industrial and consumer electronics products.

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Product Description

Typical application

surface wave substrate

optical window

Carrier Wafer or Bulk Wave Chip

Also used to make commercial and military grade crystals

filter

OCXO

TCXO

Material properties

growth method	Hydrothermal
Crystal structure	hexagonal
Lattice constant	a=4.914Å c=5.405Å
density	2.684g/ cm3
hardness	7 (mohs)
heat capacity	0.18cal/gm
melting point	1610°C (phase transition point: 573.1°C)
Thermal conductivity	0.0033cal/cm℃
Thermoelectric constant	1200uv/°C (300°C)
Refractive index	1.544
Thermal expansion coefficient	α11: 13.71×10 6 /℃ α33: 7.48×10 6 /℃
Q value sound velocity, SAW level frequency constant piezoelectric coupling	1.8×10 6 min 3160 (m/sec) 1661 (kHz/mm) K2(%) BAW: 0.65 SAW: 0.14
Wrapping	IEC Grade

Product parameters

Material	quartz crystal
Tangential	X/Y/Z/AT32, 33, 36/BT/ST42.75°-cut etc
size	3"(76.2mm)	4" (100mm)	6"(150mm)	8"(200mm)
Tolerance (±)	<0.20 mm
thickness	0.08mmMin	0.10mmMin	0.20mmMin	≥0.35mm
main reference edge	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
polishing	Single Throw/Double Throw
Surface roughness	Ra＜0.5nm
back	0.2-0.5µm
Chamfer	R=0.2mm
Material properties	ECD	better than grade 4
	envelope	Better than II
	Q-Value	better than C
surface finish	Particle ￠>0.3 µm	≦ 30
	Scratches, Chipping	none
	flaw	Five chipped edges, scratches, stains, etc.
Package	quantity	25 pieces/box