Precision Quartz Sensor Crystals

Crystal Characteristics Our standard crystal are 0.55 inch or 0.49 inch diameter and have electrodes configured with a gold or silver film deposited onto a special adhesion layer. The crystal blank contour is Plano-convex for smooth frequency response over the crystal life and the crystal orientation is AT-cut for good frequency stability with temperature. These crystals will work very successfully with most thin film monitors and controllers. Special Frequency Bands Some multi-layer and other specialized thin film applications can be better served by the use of crystals which are tuned to a very narrow frequency band. Similarly, certain controllers are also designed to operate with crystals of a selected frequency band. Testbourne will help users to select the correct crystal for their thin film controller or application. Blank Crystals Testbourne can supply the blank non-coated 5MHz and 6MHz crystals when requested. These can be a viable option for some crystal users. Packaging Options Two stock packaging options are available, being either boxes of five, or carousels of ten individual crystals. There are advantages to be gained by each of the two packaging options depending on the thin film application and crystals specification. Quality Crystals Thin film measurement accuracy and crystal life are a function of Sensor Crystal Quality. To assure that each crystal is optimized for maximum process yields and minimum downtime, 100% inspection is employed. Every crystal is inspected from the Quartz Blank stage, right through to the last coating process and final frequency selection.

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