福克斯要挑战开发枕头形状的石英晶体FX425B-16.000，纵观石英晶体的发展历程已有一百年，经过前人用心研制与发现，石英晶体产品对于我们的生活的方方面面起到不小的作用，随着深入探究，发现很多关于晶体的小秘密，使得如今的晶体发展极其强大，翻盖范围广泛，而FOX用心研制编码FX425B-16.000，FQ5032B-14.7456具备良好的稳定性能，适合用于各个领域之中，也包含广泛智能家居，仪器设备等领域。用AT切割生产的所有石英晶体都是厚度剪切振荡器，这对于进一步加工是一个很大的优势。石英晶体是无源元件，没有外部电压，它们完全没有用。精细的电极必须附着在石英上，以激励石英并使其振荡。

福克斯要挑战开发枕头形状的石英晶体FX425B-16.000，然而，这些电极的附着被证明是一个巨大的挑战，这取决于振荡的类型。理想情况下，电极应该附着在石英上的一个点上，在这个点上，即使在有电压的情况下，石英晶振的变形也是最小的。使用厚度剪切振子比使用开头提到的弯曲或纵向振子要容易得多。
然而，石英的进一步加工步骤也是必要的。在一台特殊的研磨机中，坯料被研磨成垫子的形状——中间稍厚，向外逐渐变细。石英支架连接到锥形端。以这种方式固定，薄金属电极最终被蒸发到坯件的较厚的中间部分上。
因此，AT切割在石英贴片晶振生产中具有双重功能。首先，它确保在-40到85摄氏度的温度范围内的高频率稳定性，其次，它将坯料的形状定义为厚度剪切振荡器。

原厂编码	厂家	型号	系列	频率	频率稳定度
FQ3225BR-12.000	FOX晶振	FQ3225B	MHz Crystal	12MHz	±50ppm
FQ1045AR-6.000	FOX晶振	FQ1045A	MHz Crystal	6MHz	±30ppm
FQ1045AR-4.000	FOX晶振	FQ1045A	MHz Crystal	4MHz	±30ppm
FQ1045AR-3.6864	FOX晶振	FQ1045A	MHz Crystal	3.6864MHz	±30ppm
FOXSLF/0368S	FOX晶振	HC49SLF	MHz Crystal	3.6864MHz	±50ppm
FOXLF120	FOX晶振	HC49ULF	MHz Crystal	12MHz	±50ppm
FOXSDLF/128-20	FOX晶振	HC49SDLF	MHz Crystal	12.288MHz	±50ppm
FOXSDLF/081-20	FOX晶振	HC49SDLF	MHz Crystal	8.192MHz	±50ppm
FOXSDLF/098-20	FOX晶振	HC49SDLF	MHz Crystal	9.8304MHz	±50ppm
FOXSDLF/196-20	FOX晶振	HC49SDLF	MHz Crystal	19.6608MHz	±50ppm
FOXSLF/115	FOX晶振	HC49SLF	MHz Crystal	11.0592MHz	±50ppm
FOXSLF/200	FOX晶振	HC49SLF	MHz Crystal	20MHz	±50ppm
FOXSDLF/0368R-20/TR	FOX晶振	HC49SDLF	MHz Crystal	3.6864MHz	±50ppm
FOXSDLF/040R/TR	FOX晶振	HC49SDLF	MHz Crystal	4MHz	±50ppm
FOXSDLF/060R-20/TR	FOX晶振	HC49SDLF	MHz Crystal	6MHz	±50ppm
FOXSDLF/073R-20/TR	FOX晶振	HC49SDLF	MHz Crystal	7.3728MHz	±50ppm
FOXSDLF/100R-20/TR	FOX晶振	HC49SDLF	MHz Crystal	10MHz	±50ppm
FOXSDLF/115R-20/TR	FOX晶振	HC49SDLF	MHz Crystal	11.0592MHz	±50ppm
FOXSDLF/143R-20/TR	FOX晶振	HC49SDLF	MHz Crystal	14.31818MHz	±50ppm
FOXSDLF/240FR-20/TR	FOX晶振	HC49SDLF	MHz Crystal	24MHz	±50ppm
FOXSDLF250F-20	FOX晶振	HC49SDLF	MHz Crystal	25MHz	±50ppm
FX252BS-20.000	FOX晶振	FX252B	MHz Crystal	20MHz	±50ppm
FQ5032BR-10.000	FOX晶振	C5BQ	MHz Crystal	10MHz	±30ppm
FQ5032BR-16.000	FOX晶振	C5BQ	MHz Crystal	16MHz	±50ppm
FX532B-10.000	FOX晶振	FX532B	MHz Crystal	10MHz	±50ppm
FQ7050B-11.0592	FOX晶振	C7BQ	MHz Crystal	11.0592MHz	±30ppm
FX425B-16.000	FOX晶振	FX425B	MHz Crystal	16MHz	±50ppm
FQ5032B-19.6608	FOX晶振	C5BQ	MHz Crystal	19.6608MHz	±30ppm
FQ5032B-14.7456	FOX晶振	C5BQ	MHz Crystal	14.7456MHz	±30ppm
FQ5032B-10.000	FOX晶振	C5BQ	MHz Crystal	10MHz	±30ppm
FQ3225B-20.000	FOX晶振	FQ3225B	MHz Crystal	20MHz	±50ppm
FQ3225BR-16.000	FOX晶振	FQ3225B	MHz Crystal	16MHz	±50ppm
FQ3225BR-20.000	FOX晶振	FQ3225B	MHz Crystal	20MHz	±50ppm
FQ1045A-4.9152	FOX晶振	FQ1045A	MHz Crystal	4.9152MHz	±30ppm
603-12-67	Fox晶振	FX325BS	MHz Crystal	12MHz	±50ppm
617-24.572675-1	FOX晶振	FX216B	MHz Crystal	24.572675MHZ	±50ppm
FX532B-11.0592	FOX晶振	FX532B	MHz Crystal	11.0592MHz	±50ppm
FX532B-12.000	FOX晶振	FX532B	MHz Crystal	12MHz	±50ppm
FX532B-16.000	FOX晶振	FX532B	MHz Crystal	16MHz	±50ppm
FX532B-20.000	FOX晶振	FX532B	MHz Crystal	20MHz	±50ppm
FX532B-24.000	FOX晶振	FX532B	MHz Crystal	24MHz	±50ppm
FX532B-24.576	FOX晶振	FX532B	MHz Crystal	24.576MHz	±50ppm
FX425B-20.000	FOX晶振	FX425B	MHz Crystal	20MHz	±50ppm
FX425B-24.000	FOX晶振	FX425B	MHz Crystal	24MHz	±50ppm
FX425B-24.576	FOX晶振	FX425B	MHz Crystal	24.576MHz	±50ppm
217-3.579545-12	FOX晶振	FC	MHz Crystal	3.579545MHz	±50ppm

All quartz crystals produced with the AT cut are thickness shear oscillators – a great advantage for further processing. Quartz crystals are passive components, without external voltage they are completely useless. Fine electrodes must be attached to the quartz to energize it and make it oscillate.
The attachment of these electrodes, however, proves to be a great challenge, depending on the type of oscillation. Ideally, the electrodes should be attached to a point on the quartz where it deforms only minimally, even under voltage. This is much easier with a thickness shear oscillator than with the bending or longitudinal oscillators mentioned at the beginning.
Nevertheless, a further processing step of the quartz is also necessary. In a special lapping machine, the blanks are ground until they assume the shape of a cushion – slightly thicker in the middle and tapering outwards. The quartz holder is attached to the tapered ends. Secured in this way, thin metal electrodes are finally evaporated onto the thicker middle section of the blank.
The AT cut thus fulfils a double function in quartz production. First, it ensures high frequency stability in the temperature range from -40 to 85 degrees Celsius and second, it defines the shape of the blank as a thickness shear oscillator.