A single crystal of quartz thin film and a production method therefor are provided. A method for producing a quartz epitaxial thin film comprises the steps of vaporizing a silicon alkoxide as a silicon source under atmospheric pressure to introduce the silicon alkoxide to a substrate with hydrogen chloride as a reaction promoter, and reacting ethyl silicate with oxygen to deposit a quartz on the substrate. The single crystal of quartz thin film has excellent crystalinity, and optical properties.

A method of making a quartz-shell drum includes the steps of heating a quartz tube to a temperature at least sufficient to enable quartz to flow. A diameter of a portion of the heated quartz tube is enlarged to a predetermined size. The enlarged tube is cut perpendicular to a longitudinal axis to create a shell having a desired height. A top edge and a bottom edge of the shell are ground to form smooth radii. The top and the bottom edges are fused to create top and bottom rounded edges. In an al...

Techniques for determining a frequency profile of a quartz crystal in real time. Quartz crystals are subjected to a series of temperature cycles at various temperature rates and the crystal frequencies, crystal temperature parameters, and the temperature rates are monitored as the crystal is subjected to the temperature cycles. The monitored frequencies are grouped correlated with the monitored temperature parameters and temperature rates. A system for determining the frequency of a quartz cryst...

A flexural mode quartz crystal vibrator formed from a quartz crystal plate having first and second opposed substantially planar surfaces, with a plurality of electrodes on at least one side thereof, is provided. The vibrator is characterized by the placement of electrodes on at least one of the opposed surfaces of the quartz crystal plate, the placement of the electrodes providing a vibrator having a thickness of 0.5 mm or less.

A quartz crystal vibrator unit having a passive electronic element such as a condenser is disclosed. The passive electronic element having the value to compensate the deviation of oscillating frequency from the predetermined center frequency is selected and fixed on the case of quartz crystal vibrator. Since frequency adjustment at assembling process is eliminated, work efficiency is remarkably increased.

z-face quartz of good quality suitable for piezoelectric applications can be grown at rates near 35 mil/da at p-T conditions easily accessible in commercial autoclaves. The growth conditions are predictable from previous systematic studies of growth rate. Cracking of grown crystals either during growth or in crystal processing can be severe and can account for as much as 15-50% yield loss. However, much of this loss can be reduced by carefully screening seeds for strain using the new polariscopi...

An electronic timepiece having a quartz crystal oscillator circuit adapted to be tuned to a reference frequency or a reference frequency minus mHz, where m is an integer and a divider circuit adapted to produce a predetermined timekeeping signal is provided. The divider circuit includes a plurality of divider stages, the number of divider stages determining a division ratio to produce the predetermined low frequency signal in response to the high frequency reference signal. An adjustment circuit...

An improved quartz crystal timepiece transducer wherein torque of the rotor is maximized, and energy consumption is reduced is provided. The transducer includes a permanent magnet rotor having two opposite polarity poles, the rotor being formed with respect to the mechanical axis to define at least two concentric symmetrical equal radii surfaces. Two stator poles have a common coil wrapped therearound for receiving a timekeeping drive signal applied thereto. Both stator poles have symmetrical eq...

The tuning fork quartz manometer has a tuning fork quartz (2) mounted in a protective casing (3) which is in turn part of a self-oscillating feedback circuit. According to the invention the protective casing (3) is inserted by means of a sealing compound (4) or directly into a hosing (5) of a measuring head (1,6) or a mounting support (15a, 20') so that the mounting support can in turn be inserted in the measuring head (1,6) and, as desired, an ideal rigid or elastic suspension is provided. A me...

A device of quartz glass for receiving or holding work pieces to be heated in a furnace, a region of the device projecting into the hot furnace zone having an arcuate part with a beginning of curvature and an end of curvature, which is enclosed by a vessel filled with an immersion liquid, heat radiation passed in the material of the device in a region located before the arcuate part due to total reflection being coupled out of the arcuate part and being coupled into the immersion liquid and a re...