Securities code: Wuxi Dk Electronic Materials Co.Ltd(300842) securities abbreviation: Wuxi Dk Electronic Materials Co.Ltd(300842) Announcement No.: 2022024 Wuxi Dk Electronic Materials Co.Ltd(300842) 2021 annual report summary I. important tips the summary of this annual report is from the full text of the annual report. In order to fully understand the company’s operating results, financial status and future development plan, Investors shall carefully read the full text of the annual report in the media designated by the CSRC. In addition to the following directors, other directors attended the meeting of the board of directors to consider the annual report in person
Name of director not present in person position of director not present in person reason for not attending the meeting name of the entrusted person
The audit opinion of zhongtianyun Certified Public Accountants (special general partnership) on the company’s financial report this year is: standard unqualified opinion. Changes of accounting firm during the reporting period: the accounting firm of the company changed from to zhongtianyun accounting firm (special general partnership) this year. Tips of non-standard audit opinions □ applicable √ not applicable when the company is listed and is not profitable at present □ applicable √ not applicable to the profit distribution plan of ordinary shares or the plan of converting accumulation fund into share capital in the reporting period considered by the board of directors □ applicable √ not applicable. The company plans not to distribute cash dividends, bonus shares or convert accumulation fund into share capital. Preferred stock profit distribution plan for the reporting period adopted by the board of directors □ applicable √ not applicable II. Basic information of the company 1. Company profile
Stock abbreviation Wuxi Dk Electronic Materials Co.Ltd(300842) stock code Wuxi Dk Electronic Materials Co.Ltd(300842)
Shenzhen Stock Exchange
Contact person and contact information secretary of the board of directors securities affairs representative
Name: Zhang Li, Mao Yuping
Office address: No. 11, Yongning Road, Qiting street, Yixing City, Wuxi City, Jiangsu Province building B2, phase II, entrepreneurship Park, No. 11, Yongning Road, Qiting street, Yixing City, Wuxi City, Jiangsu Province
Fax: 051087129111
Tel: 051087825727
E-mail [email protected]. [email protected].
2. Introduction to main business or products during the reporting period
(I) main business and products of the company
Taking the “global energy structure transformation and national semiconductor strategy” as the long-term sustainable development opportunity and strategic support, the company is committed to serving the application fields of photovoltaic new energy and semiconductor electronics through high-performance electronic materials.
In the field of photovoltaic new energy, the company is mainly engaged in the R & D, production and sales of conductive silver paste products used in the metallization of photovoltaic cells. Conductive silver paste is the key raw material for Cecep Solar Energy Co.Ltd(000591) photovoltaic cell manufacturing. As a metallized electrode, it directly affects the photoelectric conversion efficiency of photovoltaic cells and the output power of photovoltaic modules, and is one of the main driving forces to promote the technological innovation and continuous improvement of conversion efficiency of photovoltaic cells. With the development of photovoltaic technology, the company has continuously launched a full range of conductive silver paste products to meet the metallization needs of downstream customers for different types of photovoltaic cells, including conductive silver paste products for mainstream cell technologies such as p-type BSF cells and perc cells, a full set of conductive silver paste products for n-type TOPCON cells and a full set of low-temperature silver paste products for n-type hjt cells, Conductive silver paste products for n-type IBC back contact batteries, as well as multi type differentiated application requirements such as screen free fine line printing technology and step-by-step printing technology.
In the field of semiconductor electronics, based on the shared conductive silver paste technology platform, the conductive adhesive products for high reliability chip packaging that the company is promoting and selling are the key materials in the field of semiconductor electronic packaging. According to the differential requirements of chip heat dissipation performance in different application scenarios, the company provides conductive adhesive products with different thermal conductivity.
The main products of the company are shown in the table below:
Series product model product characteristic application
Dk91 series dk91a is efficient and has good fine line printing ability and long-term printability; It is suitable for polycrystalline mortar battery and polycrystalline mortar battery
Polycrystalline diamond wire can match square resistance 100 ohm / sq; Crystal diamond wire battery, polycrystalline black silicon
(including black silicon) conductive welding tension can meet the design requirements of black silicon battery and / or 5 main grid battery. Battery
Silver plasma
Dk91b high efficiency single has good ohmic contact under 95 ohm / sq square resistance; Suitable for single crystal BSF battery, single cell
Crystal perc conductive sintering has a wide window and can be compatible with various multi track sintering processes; Crystal perc battery
Silver paste has outstanding low-temperature sintering characteristics;
Improve the conversion efficiency of the battery at lower sintering temperature.
Dk91m advanced thin wire has good inking performance (design line width 26-28 UM); Applicable to all kinds of meshless version
The height width ratio of screen printing line of non netting sector is good; printing
Brush conductive silver paste to overcome the matching problem between meshless screen printing and single crystal suede;
Improve battery conversion efficiency.
Compared with dk91a products, dk92 series dk92a polycrystals further enhance the tensile force by more than 1 N / mm in black silicon battery process; Special for polycrystalline black silicon perc electricity
Black silicon perc has good low-temperature sintering characteristics, which is lower than the benchmark sintering temperature of perc in the industry; Pool development, compatible with diamond wire at the same time
The contact window of conductive silver paste is extended to more than 120 ohm / sq, with high conversion efficiency; BSF battery and black silicon BSF battery
It can support mass production printing of non screen version ≥ 24 um design line width, and conventional screen version ≥ 26
Um design line width of mass production printing.
Dk92b single crystal in the perc single crystal process with a square resistance 100 ohm / sq, it can reduce the power consumption of single crystal perc battery due to uneven furnace temperature
The proportion of poor El sintering caused by non-uniform conduction and diffusion of perc can improve the battery efficiency and electricity generation, and is compatible with single crystal BSF electricity
Production yield of silver plasma cell chip; pool
Production line width ≥ 26 um for conventional screen printing and ≥ 28 um for no screen printing
Um mass production printing of designed linewidth;
The special version of step-by-step printing sub grid is provided.
Dk92k double-sided breaks through the ohmic contact problem on SiNx / AlOx laminated passive film, improves battery effect, and is used for new double-sided alumina
Passivation rate of alumina; Passivated High Efficiency perc battery
The special conductor of perc is compatible with and solves the problem of aluminum oxide coating on the front of perc battery or the back of n-pert battery
Silver plasma;
It supports mass production printing of non screen version ≥ 26 um design line width, and conventional screen version ≥ 28
Um mass production printing of designed linewidth;
The special version of step-by-step printing sub grid is provided.
Dk93 series dk93a polycrystalline is designed for polycrystalline black silicon perc ldse battery, compatible with diamond wire BSF and black silicon BSF, and is mainly used for polycrystalline black silicon perc
Black silicon perc battery; Ldse battery
The glass system upgraded by ldse conductive silver supports lower contact resistance and higher resistance under square resistance ≥ 120ohm / sq
Good mass production yield of pulp;
The optimized formula can better meet the strict requirements of multi main grid battery for welding tension and reliability
Demanding requirements;
Under the same conditions, lower single silver paste consumption and good printability support conventional screen printing and printing
Fine line printing design of meshless sector.
Dk93b single crystal is designed for single crystal perc ldse battery and is compatible with single crystal BSF battery; Mainly used for single crystal perc
Perc ldse upgraded glass system supports 100200ohm / sq non ldse area square resistance and ldse battery
The ldse area square resistance design of 60-100ohm / sq conductive silver paste greatly reduces the composite loss of metal area
Loss of voltage, significantly increase the open circuit voltage UOC;
The optimized formula has wider sintering window and contact window, and is compatible with various types of passivation
The process can improve the conversion efficiency of the battery and have better mass production yield;
Under the same conditions, lower single silver paste consumption and good printability support conventional screen printing and printing
Screen less printing design;
It can also be used as conductive silver paste of sub grid for step-by-step printing.
Dk93k is designed for single crystal perc ldse battery with double-sided alumina passivation process; It is mainly used for double-sided alumina sheet
The innovative glass design of alumina single crystal meets the etching of thicker AlOx / SiNx stack and ohmic perc ldse battery
Perc ldse contact demand greatly reduces the compound loss of metal area and significantly increases the open circuit voltage UOC;
The optimized formula of conductive silver paste has wider sintering window and contact window, which can improve battery conversion
Better yield of mass production while improving efficiency;
Under the same conditions, lower single silver paste consumption and good printability support conventional screen printing and printing
Fine line printing design of meshless sector;
Compatible with and solve the problem of aluminum oxide winding on the front of perc ldse battery or the back of n-pert battery
Plating problems;
It can also be used as conductive silver paste of sub grid for step-by-step printing.
Dk93t is designed for n-type TOPCON high efficiency battery;
