What is Excimer?
Excimer is a transient combination of two atoms called an excited dimer in which there is at least one atom in an electronically excited state. Under normal conditions, atoms contain two electrons to the energy level surrounding their protons, with electrons spinning in opposite directions. When the atom absorbs energy from the light, one electron can move to a higher energy orbit and leave an unpaired electron. The atom combines with another atom to form a dimer only in these excited circumstances, and when Dimer releases its energy and the electron returns to its basic state, Dimer dissociates and emits fluorescent light. Excimer can usually take just a few nanoseconds.
Excimer lasers are ultraviolet lasers used for eye surgery, micromachining and creating computer chips. With pressure and electricity, laser dimers create an electric current of reactive gases such as fluorine or chlorine, and inert gases such as Krypton or Argon. MoleculesY inert gas temporarily binds to reactive gases and create excited compounds that release energy spontaneously or stimulation. As the molecules release their energy and dissociate, ultraviolet (UV) laser light is emitted.
ultraviolet light disrupts molecular bonds in biological or organic tissue or materials. It has a low degree of penetration and the caught tissue breaks into the air rather than burning. For these reasons, excimer lasers are used to transform or eliminate superficial tissue on the eye surface. Laser assisted interstitial keratomilieusis (lasik) is the application of UV light derived from excimer to tissue, which is the basis of the outer flap of the cornea to adjust the curvature of the cornea. The corneal shape is mounted with myopia and the cornea is treated with foresight. In addition, irregular areas of the corneal Contour, which produces astigmatism, can be eliminated.
In addition to eye surgery to treat problems with focus, excimer lasers have other health related applications. Excimer lasers were used in angioplasty to open blockages in clogged arteries. Dermatologists used excimers of xenon chloride to break up various skin lesions, including vitiligo and psoriasis. Ophthalmologists are able to accurately remove the surface scars of the cornea using an excimer laser.
Deep ultraviolet light (DUV) lasers using crypton-fluorine or argon-fluorin dimers emit light with wavelengths from 193 to 248 nanometers (7.8 x 10-6 to 9.8 x 10-6 inches). From an industrial point of view, microchip equipment manufacturers use these deep excimer lasers for high -resolution photolithography. This made it possible to capture data in such a small space as ten nanometers and allowed the production of smaller denser computer chips than chips produced by old technology. Microchips experienced a gradual reduction in size from 0.5 micrometers (2 x 10 -5 inches) in 1990 to aSI 43 nanometers (1.7 x 10 -6 inches) in 2010. In addition, Excimer lasers allowed to cut plastics and polymers with extraordinary accuracy.