For semiconductor manufacturing, a mature industry, a number of laser techniques are employed in production. Diodepumped
solid-state (DPSS) lasers are used in applications that cannot be performed by mechanical, chemical, or other
laser fabrication methods as well as where they add value through increased throughput and/or improved process quality.
Applications such as edge isolation, wafer scribing/dicing, via formation, laser doping and annealing for Semicon are
being applied to crystalline silicon PV manufacture as well as research and development for the next generation of high
efficiency cells. Similarly, selective material removal for exposing underlying layers without thermal damage is vital in
the production of thin film PV panels. In this paper, some of the most important applications of lasers along with
experimental results will be reviewed to illustrate how laser methods can have a significant impact on the development
and productivity of the photovoltaic industry.
Lasers are becoming increasingly important in today's LED revolution and are essential for increasing the efficiency and
reducing manufacturing cost of LEDs. Excimer lasers provide unique homogeneous illumination of large areas, and are
ideally suited for laser lift off (LLO) of the LED film from the sapphire substrate used for epitaxial growth. In this paper
we will discuss the excimer laser lift off technique for manufacturing vertical type LEDs, and how it can be applied to
GaN and AlN based LEDs. On the other hand, diode pumped solid state lasers excel in scribing and cutting of a number
of materials relevant to the LED industry: sapphire, silicon, silicon carbide, III-nitrides (gallium nitride and aluminum
nitride), as well as III-V semiconductors (gallium arsenide, gallium phosphide). In this paper we will discuss some of the
recent laser scribing techniques and how adequate selection of laser parameters and beam delivery optics allows for a
high quality high throughput process.
The combined effect of diffraction, anomalous dispersion and nonlinear refraction under both symmetric and unsymmetric initial conditions is studied by using a variational approach and numerical simulation. It is shown that the compression parameter Bo which strongly depends on the initial condition and the nonlinear interplay strength, plays an important role. When Bo > 0, the beam width and pulse width blow up vibrantly as z yields (infinity) . When Bo < 0, the pulse collapses oscillatorily and simultaneously both in space and time.