quartz crystal


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.

quartz crystal

a thin plate or rod cut in certain directions from a piece of piezoelectric quartz and accurately ground so that it vibrates at a particular frequency

quartz crystal

[′kwȯrts ¦krist·əl]
(electronics)
A natural or artificially grown piezoelectric crystal composed of silicon dioxide, from which thin slabs or plates are carefully cut and ground to serve as a crystal plate.
(mineralogy)

quartz crystal

A slice of quartz ground to a prescribed thickness that vibrates at a steady frequency when stimulated by electricity. The tiny crystal, about 1/20th by 1/5th of an inch, creates the computer's heartbeat. Without the quartz crystal, there would be no computers as we know them today! See clock and MHz.
References in periodicals archive ?
Without this EMS data, one may assume that the metallic lid used on the ceramic quartz crystal package would shield it from EMI; however, our data shows that ceramic packages do not guarantee superior EMS performance.
Complete quartz crystals (1, 2), a quartz sphere cut from a crystal (3) and thin quartz plates cut parallel to the crystal faces of prisms and rhombs (4) were used for the hydrothermal experiments (Fig.
2006) Isolated electrodeless high frequency quartz crystal microbalance for immunosensors.
The three cristalliers in question, Christophe Lelievre, Michael Bibollet-Ruches and Frederic Eva, opened the cleft on Aiguille Verte in August 2007; from it came clusters, to almost 10 cm, of gemmy, glowing rose-pink fluorite octahedrons to 6 cm on edge individually, as well as beautiful smoky quartz crystal clusters to large-cabinet size, and interesting specimens showing transparent, colorless, lustrous "paper spar" calcite with free-standing crystals to 6.
However, quartz crystals have drawbacks including their inability to integrate onto silicon wafers, their relative higher cost when shrunk to smaller sizes, their non-industry standard manufacturing and packaging methods, and their sensitivity to heat, shock, and vibration.
The result is the successful development of this miniature low-frequency quartz crystal unit.
The Akubio instruments apply the principles of QCM in that a high-frequency voltage is applied to a piezoelectric quartz crystal to induce the crystal to oscillate, and its resonance frequency is monitored in real time.
We have addressed this evolution by eliminating the need for the external quartz crystal and the tuning capacitors to allow for a more cost effective, robust implementation," said Elie Ayache, Discera's V.
Because of the large pocket size, each one produced from a few tons to more than 100 tons of quartz, though generally only a small part of the quartz crystal terminations have been of good piezoelectric quality (Lyckberg, 2008).
The JVD75A includes a quartz crystal in MESA technology, and the JVD75B uses a standard AT-cut blank and a low jitter frequency multiplier.
Zurich, Switzerland and Syracuse, NY 5/31/07--INFICON has acquired Maxtek, a provider of instruments and software for thin film deposition and quartz crystal microbalance (QCM) measurements.
Precision quartz crystal insures stable and repeatable results.