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Quartz

Quartz crystal is a kind of piezoelectric crystal. The piezoelectric effect of quartz crystal is used to realize frequency control, stability or selection.

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Product Description

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. Quartz crystal also has excellent optical properties such as wide light transmission range (170nm-2500nm), good optical uniformity, and high transmittance. It can be used to make optical components such as ultraviolet windows, optical wave plates, optical rotation plates, and optical low-pass filters. It is used in high-definition camera, optical instrument and optical fiber communication and other fields.

Material Properties

density	2.65g/ cm3
Moh's hardness	7
Temperature Coefficient	aa=6.2x10 -6 /k ac=10.7x10 -6 /k
Refractive index	no=1.5350, ne=1.5438 @ 1 µm
damage threshold	>1GW/cm 2

Product Parameters Wafer

Specification	4"	6"	8"	10"	12"
diameter mm	100	150	200	250	300
Tolerance(±)mm	0.2	0.2	0.2	0.2	0.2
Thickness mm	>0.10	>0.30	>0.40	>0.50	＞＜0.50
Main reference side mm	32.5/47.5/57.5 etc.
TTV(um)	<3	<3	<3	<5	<5
Warp(um)	≤ 30	≤ 40	≤ 50	≤ 50	≤ 50
Orientation	AT cut, ST cut, X cut and Z cut
Chamfer mm	fillet
polishing	Single Throw/Double Throw
Polished Ra	≤1nm
back	fine grinding

Substrate

Orientation	AT cut, ST cut, X cut and Z cut
Dimensional tolerance mm	+/- 0.02
Thickness Tolerance mm	+/- 0.02
Flatness	λ /10
RoughnessRa	<1nm
smoothness	10/5