AT Cut Coated Quartz Endcaps For Thickness Shear Mode Pressure Sensor

The dual-mode Thickness-Shear Pressure sensors is used in the oil and gas industry. It measures both pressure and temperature and provides increased resolution over previous designs. Range and sensitivity for quartz pressure sensor designs are determined by the resonator and endcap dimensions and crystallographic orientation. Performance objectives for the design include the ability to withstand repeated cycling to pressures exceeding full scale (5000 psig or 34.474 x lo6 Pa) at maximum temperature. Additional performance objectives for the sensor include accuracy better than &0.025% of full scale pressure, repeatability better than &0.015% of full scale, and resolution better than 0.01 psi (68.95 Pa).

A unique feature of the design is a large sealing area to minimize stresses transmitted through the joint to the resonator. Adjacent to the sealing face, the cylinder wall tapers away from the center of the cylinder bore, reducing the cylinder wall thickness and increasing the inner bore radius. The re-entrant endcap design employs a thicker cylinder wall at the resonator interface to minimize joint stresses and a thinner cylinder wall away from the joint to reduce the endcap stiffness and enhance sensitivity.

BonTek can provide the quartz endcaps AND the quartz resonator, both of which are AT-Cut thickness-shear mode.

Founded in 1999, Hangzhou Freqcontrol Electronic Technology Ltd. is a China leading manufacturer of piezoelectric crystal wafers, substrates, components and single crystal growth. We, known as the "CQT Group" in global market, headquartered in Hangzhou, China, empowered by its manufacturing sites in Shanghai, Jiaxing and Deqin etc.

Our products are mainly used in RF Telecom, Semiconductor, Biotech, Optical engineering and frequency control industries. The monthly production capacity: 500K single quartz blanks (SC, AT, IT, FC, etc.), 20K quartz wafers (AT, ST, X, Z, etc.), 10K LiNbO3 wafers (3~8 inch), 10K glass wafers (Fused silica, Borofloat33, Corning, etc.), 8K LiTaO3 wafers (3~6 inch), and 100K filters/oscillators (VCXO, TCXO).

Our company vision is to be a reliable primary Microelectronic substrates supplier in today's world.

The CQT Group consists of five major plants with total floor area over 10,000 m². Our production machines include crystal growth furnace, wire saw, X-ray orientation, grinding machine, polishing machine, chamfering machine, CNC, REDOX chambers etc. Inspection equipment include Flatmaster 200, AOI, profilometer, optical imager, X-ray inspector etc. We are also equipped with Class 100 and 1000 clean rooms.

The CQT group is primarily known as the expert of hexagonal crystals, We master the manufacturing process of single & doubly rotated quartz blanks, and we can provide quartz of any orientation cut whether given by IRE , Miller index, Euler angle or conventional sign.

In addition to our leading quartz blank manufacturing capabilities, the last decade sees our major technological breakthroughs. We overcome the 3~6 inch ultra-thin wafer mass production barrier, obtained the reduction technology of black LiNbO3 & LiTaO3 wafers, and achieved 8 inch LiNbO3 wafer mass production successfully.

Competitive Advantages

1. Reliable partner: We are in this business for over 30 years, served over 200 customers in 20+ countries.
2. Complete production line: We do crystal orientation, wire cut, grinding, polishing, etching, flat/notch, surface inspecting, x-ray detecting etc. all in house!
3. State-of-the-art cleanroom: We have 3 Class1000 clean room, 1 Class100 work desk, complete wafer cleaning & drying process.
4. Efficient customer service: Prompt RFQ response & Order confirmation in 24 hrs, customization lead time in 4 weeks.