Manufacture Process For Frequency Control Products

Manufacture Process For Frequency Control Products

The most significant elements of frequency control products include Quartz Oscillators, crystals and Filters.

Just about every appliance and mobile wireless device from mobile phones to remote controlled gadgets have quartz crystals designed into them for accurate timing and frequency regulation.

Typical Applications include:

Security cameras

Radio transmitters

Cell phones

Navigation

Sensors

Disk drives

Personal computers

Crystal Manufacturing

Crystal production takes place in two stages, optical and electrical:

Optical

Quartz crystal manufacturing starts with the selection of quartz crystal blanks with the suitable thickness and cut orientation from a comprehensive library of quartz crystal blanks. Subsequent processes include lapping, polishing and contouring operations to produce quartz blanks with precisely specified sizing, shape, orientation and surface finish to guarantee the correct electrical qualities of the completed items.

Electrical

The optical processes of production are followed by electrical processes such as etching and cleaning, vacuum deposition of gold or silver electrodes, mounting and bonding, adjustment to final frequency, encapsulation, marking and final quality assurance inspection.

Crystal oscillator Manufacture

Oscillator units are manufactured using both thick film hybrid substrates and printed circuit board methods. Depending upon the application, the oscillator crystal may be incorporated as an independently sealed device or as an un-encapsulated crystal blank. In the latter circumstance, the blank is mounted directly onto the oscillator substrate and the completed assembly is altered to closing frequency before hermetic sealing. Products produced by an oscillator division usually includes regular CMOS/TTL oscillators, ECL/PECL output oscillators, Voltage Controlled Crystal Oscillators (VCXOs), Temperature Controlled Crystal Oscillators(TCXOs), and Oven Controlled Crystal Oscillators (OCXOs), these latter products needing a considerable input by engineering and QA departments.

Filter Creation

Crystal filters consist of a variety of discrete crystal or monolithic dual components put together on a printed circuit board (PCB) with other passive elements (capacitors, transformers, inductors etc.), the complete unit being hermetically sealed in a metal casing. The elementary production actions for filter production are crystal devices, printed circuit board (pcb) assembly, filter alignment, encapsulation and closing verification. Additionally to crystal filters other custom filters can be produced; (e.g. LC filters,) for production of these components many non-crystal components for example wound coils are necessary.

Euroquartz Ltd are designers and manufacturers of frequency control devices including quartz crystals and oscillators. It's complete manufacturing service offers:-

UK based design engineers

On site production facilities

Quick delivery

Low cost

Stockholding of standard products

Quality assured production process - ISO 9001 certification

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