In the test workshop of GDQM Electronic Materials Technology Co., Ltd., silicon wafers are transported at a uniform speed on the production line, and the upper printing equipment accurately brushes the conductive paste onto the surface of the silicon wafers. After drying and sintering, these silicon wafers will undergo a comprehensive performance test, and they can be used in photovoltaic solar products only after they are qualified.
The seemingly simple conductive paste condenses an independent research and development core technology of GDQM-controllable mass production of nano-precious metal synthesis technology. "With this technology, the flexibility, low-temperature sintering and high conductivity of conductive materials can be realized. Printing meets multiple emerging industries such as new electronics and 5G communications, new photovoltaic solar energy, smart electronics and medical health.
The secrets of nano conductive materials
The high sintering temperature of traditional metal materials greatly limits the choice of printing substrates. The sintering temperature of electronic paste using GDQM nano-precious metal synthesis technology is as low as 70°C, which can be applied to flexible printing of PET, ceramics, fabrics, paper and other types of substrates, making its industry application space broader.
The secret to achieve this technological breakthrough is "hidden" in the conductive paste. GDQM realizes the controllable mass production preparation of nano precious metal synthesis technology. Its silver nano ink used for electronic printing has a 99.5% particle size up to 5±2nm, which is the highest level in the industry and has excellent stability and conductivity. . At the same time, the company took 13 months to complete the replacement of nationally produced raw materials and established a complete raw material quality control system, which not only ensures stable mass production and high performance, but also has a good cost advantage.
To make full use of the superior properties of nano-materials such as low-temperature sintering and high electrical conductivity, it also depends on the basic formulation of the paste and the printing process technology. GDQM has accumulated more than 30,000 basic formulas and mastered many mainstream processes such as silk screen printing, pad printing, and gravure printing. The formula system covers two categories of low-temperature resin curing and high-temperature glass phase sintering, which can be adapted to the printing preparation of various substrates, including the production of photovoltaic solar cell electrodes and large-area flexible electrodes and sensors.
In recent years, GDQM has been committed to providing flexible printed electronic materials and solutions for all walks of life, and has become a partner of many leading companies in the industry. In the conductive paste section of new electronic components, the company’s ceramic filter conductive silver paste has passed the PCN verification by well-known large customers; in the photovoltaic solar conductive paste section, the company has become a supplier to many top ten companies in the world .
In China, the application time of flexible conductive materials is not long. It is not easy to quickly implement this emerging technology and bring it to the market.
As early as 2013, GDQM's R&D team and several scientists participated in the project "Highly Conductive Transparent Nano Silver Ink and New Generation Flexible Touch Screen Display Electronic Materials", which was successfully selected as a provincial-level scientific and technological innovation team funded project.
With the support of a strong R&D team, the company has achieved rapid development in many fields. Among them, in terms of technology research and development, company members have more than 30 international patents and applied for more than 50 Chinese patents; in terms of operating performance, the company has maintained rapid growth in recent years, with sales of 140 million yuan last year and it is expected to exceed 200 million yuan this year.