Everwide newsletter No.461

Experiment § JE720 High-Performance Encapsulation Adhesive

JE720 is designed for power module potting, offering both excellent durability and high production efficiency. After mixing, it provides outstanding workability and flow characteristics, meeting low-halogen requirements. When used in conjunction with automated dispensing equipment, the JE720 can significantly enhance production throughput. Once cured, JE720 exhibits excellent toughness and mechanical properties. It passes thermal shock tests (−40 °C to 105 °C, 1,000 cycles) and long-term high- and low-temperature testing with no resin cracking (Fig. 1). After 1,000 hours under 85 °C/85% RH conditions, potted components remain intact and undamaged. JE720 also passes 125 °C/2,000 h leakage current tests, insulation resistance tests, and dielectric withstand voltage tests. It demonstrates excellent adhesion to metal surfaces, making it ideal for applications requiring strong bonding to metal substrates. The cured surface has a high gloss finish, is free of oiliness, and meets customer expectations for appearance quality (Figs. 2 & 3). Additionally, it achieves a significant degree of cure at 80 °C for 40 minutes, enabling shorter production cycles and improved manufacturing efficiency (Fig. 4). We strictly control product quality and invite you to contact us for further information.                                        — Author: Mr. Shih Geng-Chang

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Activity § Welcomes Student Visitors

Many students say, “I don’t know what my interests are.” Besides discussing with teachers and mentors, exploring the world around you is also a great way to find out. In the past, “factory visits” had to be arranged through schools and organized for large groups. Now, that’s no longer necessary — you can register online to visit Everwide, and a group can be formed with just five people. During the visit, we guide participants through the manufacturing process, explain the fields where our products are applied, and even include a hands-on mini experiment to give everyone their first experience with photocuring. We hope this “learning trip” can connect what students learn in school with how knowledge is applied in a factory, helping them gain a clearer idea of their future. (Figures 1–5)

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Knowledge § What is the ductility of a material?

Ductility & Malleability refer to a material’s ability to undergo plastic deformation before fracture. Upon closer examination, ductility and malleability are two distinct concepts. Ductility describes a material’s ability to deform under tensile stress without breaking, whereas malleability refers to a material’s ability to deform under compressive stress — such as forging or rolling into thin sheets — without fracturing. A material’s performance in these two properties may differ: for example, gold exhibits both excellent ductility and malleability, while lead has poor ductility but excellent malleability. When polymer technical data state that a material has “good ductility,” it usually refers specifically to ductility — the ability to resist fracture under tensile deformation.

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Living § Storytelling volunteer for elementary classes

When my daughter entered first grade, one day after school, she asked, “Mom, can you join the parents’ committee? “Uh… well, sure!” Mom replied. A week later, she submitted the volunteer form to the school and began volunteering in the library. Using her talent for organization, she created a well-structured book lending system and delivered picture books to the classrooms every week, encouraging the children to read. Her dedication impressed the principal so much that she was appointed as the leader of the picture book team. At my wife's invitation, I also joined as a storytelling volunteer. For my very first session, I prepared slides, but I was nervous. After 15 minutes, I was drenched in sweat. But when the teacher guided the kids to clap enthusiastically, this dad, in his fifties, was moved to tears, stood at attention, and thanked everyone for their support. With more experience, I learned which kids love to ask questions and gave them more chances to interact. I also noticed that kids today are much more willing to participate compared to when I was young, when we were too scared of being scolded to raise our hands. Their eagerness to learn really touched me. Even though I’ve chaired countless meetings and significant events as a department head, telling stories to children of this age was truly a first for me. I still don’t know where I found the courage to say yes back then—but after going through this experience, I deeply feel that even our small contributions can inspire and create meaningful learning opportunities for this new generation. And that warm feeling fills my heart every time.   ─by Mr. Huang Zhufang