Crystalline silicon solar cell laser edge insulation treatment

With the steady development of the crystalline silicon solar cell industry, the laser has been considered as an important tool to improve the quality of the battery and reduce manufacturing costs. Laser machining such as laser ablation electrode (LFC), the laser groove buried gate electrode (LGBC), as well as applications such as M / EWT growth significant application in the manufacture of crystalline silicon solar cell, the most widely used one of the laser process is a laser edge insulated.

c-Si in the battery manufacturing process of the N-type ion doping / diffusion into the P-type silicon substrate forming a micron level N-type doped layer, this layer surrounded the entire wafer, resulting in the front and back electrodes of the battery shunt insulation processing must be on the edge of the battery in order to avoid shunt.

Crystalline silicon solar cell laser edge insulation treatment

The typical laser edge insulation processing is performed by scribing trench in as close as possible around the outer edge of the solar cell to achieve. In order to obtain the best insulating effect, the depth of the trench must be greater than the ion diffusion layer, the typical trench depth is 10-20um, a width of 20-40um. Spectra-Physics laser products have many models capable insulated, but processing the fastest, highest quality or the latest Q-switched solid-state laser series, which preferred Pulseo 355-20.
355nm short wavelength, short pulse width of 23ns makes Pulseo laser ideal is insulated from the solar panel process. Insulation dicing speed laboratory tests prove that combine high-speed scanning galvanometer, Pulseo 355-20 in 1-2 seconds can be insulated 156mm wafer the integrated processing equipment depends a good optical system design (spot) hope to reach 500-1000mm/sec or higher.

Because of the short pulse width, the role of the silicon wafer caused by 355nm short wavelength shallow depth factors created precision insulating Pulseo ultraviolet laser scribing. As another option 532nm laser can also be used for insulation crossed, and maintain the same high speed and high quality.

For green light, we provide Pulseo 532-34, a high-power Q-switched lasers. When combined with the current scanners, access to both high-speed cornering with minimal ablation. 120kHz repetition frequency under extremely high power and stability, and superior performance to it under a small focused spot can be obtained a smooth uniform scribe line. In short, the short pulse width of Pulseo 532-34 combined with high peak power and high repetition rate to bring clean and efficient laser insulation crossed effect.

Crystalline silicon solar cell laser edge insulation treatment

The edge of the solar cell insulation treatment recommended products a: Pulseo laser

The Pulseo series laser continuation of the excellent quality of the all-solid-state Q-switched laser Spectra-Physics high-power, high-repetition-frequency, high peak power, short pulse width, with strict manufacturing standards, ideal for high precision machining for industrial applications.

(F) on the positive and cautious relationship problems.

A positive attitude and a fearless will to get anything done on the basis of the entrepreneurial spirit is very valuable. Our urgent need to seize a rare historical opportunity, as soon as possible to achieve a breakthrough in this new high ground of the new energy. New energy industry chain length, the obvious effect of stimulating the economy and increasing employment. So, the local governments and enterprises to develop new energy attitude is very positive, which made many recommendations to accelerate development, such as: Do not argue, do not be afraid of chaos, to dry up first, to solve the problems in the development process in the development of its urgent The feelings are understandable.

However, the development of an industry’s eagerness and desire to this industry can bring an important contribution to the economy and a large number of additional jobs, and not a substitute for all sectors of the industry, “technically feasible and economically reasonable” basic requirements. Each and every element have the technical feasibility and economic reasonableness is normal functioning and healthy development of the industry chain really protect. The scale of investment in new energy industry is huge, huge total occupied various social resources, including a large number of government subsidies to fund a wide range of impact, the power is still very expensive. Only in this industry all facilities to achieve normal operation according to the design level, in order to receive a look forward to the effect of stimulating the economy and increase employment. Otherwise,solar charge controller they cause a greater loss of the whole industry chain.
China’s economy and society can not withstand the “toss”. The development and utilization of new energy sources have both positive and enterprising spirit, but also “in perpetuity”, “standing on the edge into the abyss” as a sense of responsibility. Both spirit reflected in the research questions seriously, respect for scientific truth, and comply with relevant state laws and regulations and construction procedures, specifications, preparation and demonstration project feasibility study report, the practical implementation of all aspects of supporting conditions, attaches great importance to the country for the construction project “technically feasible and economically reasonable” basic requirements, commitment to reform, the timely removal of institutional obstacles, establish and improve the public, fair, fair competition and comparison mechanism, to learn the lessons of the various aspects of middle age, in the specious argument, cooling Great Leap Forward “of the impulse to avoid the loss of” haste makes waste “, as possible” rainy day rather than the KMT, calmly, steadily and surely, worked out in line with the laws of science, certain forward-looking policies, realize effective in promoting the healthy and sustainable development of the new energy industry.