acid-etched crystal

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• Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal …   Wikipedia

• Photonic crystal — The opal in this bracelet contains a natural periodic microstructure responsible for its iridescent color. It is essentially a natural photonic crystal, although it does not have a complete photonic band gap. Photonic crystals are periodic… …   Wikipedia

• etch — [[t]e̱tʃ[/t]] etches, etching, etched 1) VERB If a line or pattern is etched into a surface, it is cut into the surface by means of acid or a sharp tool. You can also say that a surface is etched with a line or pattern. [be V ed into/in/on n]… …   English dictionary

• Widmanstätten pattern — Widmanstätten patterns, called also Thomson structures, are unique figures of long nickel iron crystals, found in the octahedrite iron meteorites and some pallasites. They consist of a fine interleaving of kamacite and taenite bands or ribbons… …   Wikipedia

• Window film — Window film, also called window tint or Lustalux, is transparent plastic film or metallic laminate which is applied to glass windows specifically to reduce heat and radiation from the sun. It is available in many different compositions with… …   Wikipedia

• Rod sheath — The rod sheath is an area identified in histologic sections of a tooth. It is found where enamel rods, the functional unit of enamel, meet interrod enamel. The crystals of both types of enamel meet at sharp angles and form the appearance of a… …   Wikipedia

• Etching (microfabrication) — Etching tanks used to perform Piranha, Hydrofluoric acid or RCA clean on 4 inch wafer batches at LAAS technological facility in Toulouse, France Etching is used in microfabrication to chemically remove layers from the surface of a wafer during… …   Wikipedia

• photoengraving — /foh toh en gray ving/, n. 1. a photographic process of preparing printing plates for letterpress printing. 2. a plate so produced. 3. a print made from it. [1870 75; PHOTO + ENGRAVING] * * * Any of several processes for producing printing plates …   Universalium

• materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …   Universalium

• Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 …   Wikipedia

• metalwork — metalworker, n. /met l werrk /, n. objects made of metal. [1840 50; METAL + WORK] * * * Useful and decorative objects fashioned of various metals. The oldest technique is hammering. After с 2500 BC, casting was also used, molten metal being… …   Universalium