Our company, Yixing Wencheng Chemical Co., Ltd., is a manufacturer of acrylate series, including dipentaerythritol hexaacrylate. We have been engaged in the production and sales of acrylate series and their derivatives for over 15 years. In recent years, with the rapid advancement of technology and the explosive growth of AI servers, new energy vehicles, optical communications, and optical modules, the global demand for high-end PCBs is increasing. AI server computing power is the core driving force behind high-end PCBs, accounting for more than 35% of the new demand.
In our actual production and operation, our customers' feedback indicates that the current PCB market is experiencing explosive growth in the high-end segment and shrinkage in the low-end segment. PCBs are no longer used as ordinary circuit boards in small household appliances; they increasingly require high multilayer, high-frequency, high-speed, high-heat-resistant, and high-insulation properties to meet the needs of high-end applications such as AI servers and optical communications. The increased demand for high-end PCBs has led to a structural upgrade in the demand for dipentaerythritol hexaacrylate (DPI). Compared to PCB inks used in ordinary circuit boards, the proportion of DPI in PCB inks used in high-end boards has increased from 4% to 8%. This increased proportion of DPI in PCB inks enables high-end PCBs to achieve high cross-linking, high insulation, high resolution, and high heat resistance.
Dipentaerythritol hexaacrylate (DPHA) is a core skeletal monomer for high-end PCB inks. While ordinary PCBs can use TMPTA and HDDA to create a formula, high-end PCBs rely heavily on DPHA for performance. DPHA is a hexafunctional, ultra-high crosslinking monomer, an essential raw material for high-end solder resist, text inks, and photosensitive inks, and cannot be easily replaced. Only DPHA can precisely address the five major pain points of high-end PCBs such as AI server boards, automotive electronics boards, high-frequency and high-speed boards, IC substrates, and high-multilayer precision PCBs.
1. Ultra-high cross-linking density, meeting lead-free high-temperature soldering requirements
High-end PCBs require lead-free wave soldering at 260℃~288℃ and multiple reflow soldering cycles. DPHA has six double bonds, resulting in a significantly higher cross-linking density than trifunctional and difunctional monomers. Ordinary monomers lack sufficient cross-linking, leading to cracking and delamination at high temperatures, rendering high-end boards unusable.
DPHA's role: Prevents bubbling, voids, shrinkage, and peeling.
2. High hardness and high wear resistance, suitable for precision circuitry and subsequent processes
AI boards and automotive boards have dense circuitry, small hole diameters, and narrow spacing, requiring component insertion, wiping, and cleaning. DPHA imparts high hardness, scratch resistance, and mechanical wear resistance to the coating, preventing scratches on the circuitry and copper during processing, ensuring the integrity of delicate circuitry.
3. Extreme Chemical Resistance, Passing Stringent Chemical Testing for High-End PCBs
High-end PCBs require long-term resistance to: flux, acid and alkali etching solutions, cleaning agents, and moisture and mold.
DPHA's highly cross-linked, dense structure with extremely small molecular gaps enables it to resist penetration, chemical corrosion, copper surface oxidation, and ion migration—achievements that ordinary monomers simply cannot match. This is especially crucial for automotive electronics and industrial control PCBs where chemical resistance is paramount.
4. High Insulation and Low Dielectric Compatibility, Essential for AI/High-Frequency, High-Speed Boards
AI servers and 5G/6G high-frequency boards have extremely high requirements for insulation resistance, withstand voltage, and low leakage current. After curing, DPHA's film structure is stable, with extremely low water absorption, improving volume resistivity, high voltage resistance, moisture resistance, and insulation, preventing signal interference and leakage failure.
5. Fast curing speed, high resolution, and high-precision PCB manufacturing. Ideal for high-end PCBs with fine lines, narrow pitch, and microvias. DPHA boasts high reactivity, fast UV curing, and high exposure imaging accuracy, resulting in sharp line edges, no oil seepage, and no smudging, thus improving resolution and yield.
In high-end PCB inks, DPHA is responsible for sealing hardness, heat resistance, chemical resistance, and insulation. It also possesses di/trifunctional properties: adjusting toughness, reducing shrinkage, and adjusting viscosity. Therefore, DPHA plays a decisive role in the functional performance of PCBs. High-end PCB inks have extremely high requirements for DPHA quality, demanding: high purity (≥98%), high hexapeptide content (≥90%), low acid value (≤0.5%), low moisture content (≤0.2%), and low chroma (APHA≤60). The main features are high hardness, resistance to 260℃ soldering, resistance to high-frequency flux, and low shrinkage. Our company's DPHA meets all these requirements.
Our high-quality dipentaerythritol hexaacrylate (DPHA) series products are known for their stable performance and excellent quality, and are exported to many countries worldwide. They are widely used in industries such as PCB inks, 3C and plastic UV coatings, printing inks, 3D printing, and adhesives. With fifteen years of experience in the industry, we have always adhered to the principles of quality and stable production capacity. We sincerely welcome customers from all walks of life to inquire, discuss cooperation, and work together!
