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Positive PN junction collect the photogenerated electrons to the diffusion region of phosphorus flows along the edge of the back of the PN junction, and cause a short circuit. Thus, the periphery of the solar cell must be doped silicon etch to remove the PN junction edge of the battery. Plasma etching technique commonly used to complete this process. Plasma etching under a low pressure state, the reaction of the parent molecule in the gas CF4 RF power excitation, ionization and plasma formation. The plasma is composed of charged electrons and ions, in the reaction chamber under a gas electron impact ion addition into, but also absorb energy and form a large number of reactive groups. Active or reactive groups arrive SiO2 surface due to diffusion in the electric field, where the surface is etched with the occurrence of chemical reactions and the formation of volatile reaction products from the surface of the material to be etched, drawn by the vacuum chamber system. Sixth, the reflective coating antireflection film removal rate was 35% of the silicon surface, in order to reduce the surface reflection to improve the conversion efficiency of the battery, it is necessary to deposit a layer of silicon nitride antireflection film. Industrial production are often used in the preparation of PECVD equipment antireflection film. That PECVD plasma enhanced chemical vapor deposition. It is the use of low temperature plasma technology for the energy source, the sample is placed on the low-pressure glow discharge at the cathode of the glow discharge, the sample is heated to a predetermined temperature and then passed into the appropriate amount of reaction gas SiH4 and NH3, the gas After a series of chemical reactions and plasma reaction, the sample surface to form a solid film that is a silicon nitride film. Generally, the film thickness of the chemical vapor deposition method using such a plasma-enhanced deposition of about 70nm. Such a film having a thickness of the optical functionality. Reflecting the use of thin-film interference principle, can make light of the greatly reduced battery short-circuit current and the output there is a great increase in efficiency is also a considerable improvement. After seven, screen printing solar cells through texturing, diffusion and PECVD processes, has made the PN junction, can produce a current in the light, in order to export the current will be generated on the surface of the battery needs to produce positive and negative two electrodes . Many methods for producing the electrode, and the production of screen printing is the most common type of solar cell electrodes of the production process. Screen printing is a method using a predetermined embossed pattern printed on a substrate, the apparatus by a battery back-surface silver paste printed aluminum, aluminum paste printed on the back of the battery and the battery positive silver printing of three parts. Its working principle is: the use of the graphical portion of the mesh screen through the slurry, with a spatula exert a certain pressure slurry site in the screen while moving toward the other end of the screen. The ink is extruded from the scraper portion of the mesh pattern in the movement to the substrate. Since the viscosity of the slurry so that the role of imprinted fixed within a certain range, printing, screen printing squeegee always linear and the substrate in contact with the blade moving contact line is moved, thereby completing the print stroke.