Everwide newsletter No.473
- skill484
- Jan 19
- 3 min read
Experiment § EMI Shielding and Sealing Silicone
Electromagnetic interference (EMI) control utilizes conductive or high-permeability materials to reflect or absorb unwanted electromagnetic waves, ensuring the stable operation of electronic components within a specific area or device. During design and assembly, three requirements must be considered simultaneously: EMI protection, structural fixation, and environmental sealing. To meet these requirements, Everwide has developed the EMI shielding and sealing silicone FX251 (Fig. 1). This single-component material integrates three functions—shielding, adhesion, and sealing—and is suitable for the FIP process, effectively simplifying the process and improving assembly efficiency (Fig. 2). In practical applications, insufficient adhesion strength may lead to structural loosening, which can affect shielding performance and reliability. In aluminum-to-aluminum substrate tests, FX251 showed an adhesion strength of 35 kgf/cm² after heating at 120 °C for 1 hour. Even after long-term exposure to 85 °C / 85% RH for 500 hours, the adhesion strength increased steadily to 45 kgf/cm², demonstrating excellent adhesion performance (Fig. 3). In terms of electromagnetic wave absorption and suppression, the minimum reflection loss can reach −50 dB, with an effective bandwidth of approximately 1 GHz. For a 2 mm specimen, the effective frequency band is about 7.8–8.9 GHz (Fig. 4). If you are interested in this product, please feel free to contact us. — Author: Mr. Huang Yi-hsun
Activity § Setting Off for a New Beginning
For this year’s first hiking activity, we chose Dongmao Mountain, one of the Guguan Seven Heroes. After arriving at the trailhead early in the morning, we saw the mountain cherry blossoms in full bloom, and the breath of spring was everywhere. After setting off, we soon realized that the 6.7-kilometer trail had no restrooms, which unexpectedly led some of our companions to unlock the special achievement of “returning to nature.” Although Dongmao Mountain is considered relatively easier among the Seven Heroes, the trail still features changing slopes and rugged terrain, making it far from a leisurely outing. Some companions experienced leg cramps due to exhaustion, while others accidentally fell on the uneven sections. Fortunately, everyone supported and encouraged one another along the way, and in the end, the entire team successfully reached the summit. For the next mountain, we’ve already promised to set off together again.
Knowledge § What Is the Principle of Recyclable Epoxy Resins? (3)
Thermoplastics have linear molecular structures. They melt at high temperatures and solidify at low temperatures, and suitable solvents can be found to dissolve them; therefore, they are considered recyclable materials. When aging reactions are not considered, the chemical structure of thermoplastics remains the same whether they are virgin materials or recycled materials, and their physical properties are also the same. From this perspective, for recyclable epoxy resins, the chemical structures of the “virgin material” and the “recycled material” will not be the same, and their physical properties are likely to differ as well. Furthermore, the formulations developed by manufacturer A using recyclable epoxy resins will not be the same as those developed by manufacturer B. When products from the two manufacturers are recycled together, the composition of the recycled material will become even more complex, which is also a factor that must be considered in practical applications.
Living § Resetting the Mindset
The foundation of team spirit lies in appreciating each person’s strengths. In the mixing room team, some members work quietly and diligently, while others bring energy to the atmosphere. Two QC colleagues, Shirley and Yafang, remain focused even under tight schedules while still interacting with others, bringing warmth and flexibility to the workplace. During the five days of training at the workstation, the word heard most often was “reset.” Before every weighing operation, the scale must be reset to zero—almost a reflex. It is not only a step in the process, but also a reminder: the work should be reset to zero, and so should one’s mindset. On the fourth evening, thinking I was already familiar with the raw-material storage locations, I retrieved materials without confirming the division of work with my colleagues, which caused rework and wasted time. At that moment, I realized that what truly needed resetting was my own mindset. I would also like to thank Aunt Qinliang for her care. Although I am a vegetarian, she thoughtfully adjusted the dishes and often checked whether I had eaten enough. This kindness reminded me that the value of a team lies not only in results, but also in everyday respect and consideration. — Author: Mr. Shi Yaowei
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