長鴻電子股份有限公司

13/02/2026

Welcoming 2026 — The Year of the Horse.

EW PCB sincerely thanks our global customers and partners for your continued trust and collaboration.

We specialize in high-reliability PCB manufacturing, including:

• Multilayer PCBs (up to 26 layers)
• HDI (High-Density Interconnect)
• High Frequency / Rogers PCBs
• Automotive PCBs
• Rigid & Rigid-Flex Boards
• Aluminum & Specialty Material Applications

With ongoing process optimization, advanced equipment investment (LDI, VCP plating systems), and strengthened supply chain integration, we are committed to delivering stable quality, reliable lead times, and technical support for fast-growing sectors such as AI, EV, ADAS, and advanced communications.

We look forward to achieving greater milestones together in 2026.

🐎 🐴

12/02/2026

PCB Countersink Hole Design Guide: From Fundamentals to Manufacturing

In modern electronics manufacturing, mechanical precision is just as critical as electrical performance. One often-overlooked feature that directly impacts assembly quality and structural integrity is the PCB countersink hole.

Whether used for flush-mounted screws, enclosure integration, or structural reinforcement, a poorly designed countersink can lead to assembly misalignment, reduced board strength, or costly production rework.

This comprehensive guide walks you through everything you need to know about PCB countersink hole design, including:

．What a PCB countersink hole is and how it differs from a counterbore

．Standard countersink angles (82°, 90°, 100°) and their applications

．How to calculate hole diameter and depth correctly

．The relationship between countersink depth and PCB thickness

．Manufacturing methods and CNC machining limitations

．DFM considerations to avoid fabrication issues

．Proper engineering drawing callouts for clear communication with PCB manufacturers

Understanding these parameters ensures your mechanical design is production-ready, structurally sound, and aligned with fabrication capabilities.

Whether you are a PCB designer, hardware engineer, mechanical engineer, or sourcing specialist, this article will help you optimize your PCB mechanical features before entering mass production.

Read on to ensure your next PCB design is both electrically reliable and mechanically robust.

Master PCB countersink fundamentals to manufacturing! Explore key design guidelines, DFM checklists and practical tips for flush mounting, tolerance control and counterbore comparison in PCB assemblies. Improve your design—discover more today!

25/07/2023

We held a two-day company trip to the breathtaking LihPao Resort and the serene Sun Moon Lake last week.
The entire trip was a perfect blend of adventure and relaxation, allowing us to strengthen our team spirit and forge lasting connections. Everlast Win's company trip to LIHPAO RESORT and Sun Moon Lake will forever hold a special place in our hearts as a cherished travel experience.

20/07/2023

If any PCB inquiries and you have no idea how and what information you need to provide PCB suppliers, please kindly check below link and read more.
https://www.ewpcb.com.tw/en/faq.html

Send a message to learn more

30/06/2023

While the PCB occurs the board warpage and bow, In severe cases, this can result in soldering defects, tombstoning, and component displacement on the surface mount technology (SMT) assembly after completion. How to improve it happen? Please kindly refer to the below link to read more....

Everlast Win Electronics CO., Ltd. offers single-sided PCB, double-sided PCB, multi-layers PCB including: RPCBs/ Multilayer PCBs, FPCBs-Flexible PCBs, Rigid-Flex PCBs, HDI PCBs, Special Material PCBs

16/06/2023

Please kindly refer to the below link to read more about Removal Of Gold Finger Plating Tie Bar...
https://www.ewpcb.com.tw/en/a4-11008-12426/Removal-of-Gold-Finger-Plating-Tie-Bar.html

Everlast Win Electronics CO., Ltd. offers single-sided PCB, double-sided PCB, multi-layers PCB including: RPCBs/ Multilayer PCBs, FPCBs-Flexible PCBs, Rigid-Flex PCBs, HDI PCBs, Special Material PCBs

25/05/2023

25/05/2023

When you send a signal through a printed circuit board (PCB), it can be affected by signal noise, crosstalk, and other unwanted distortions. To mitigate these effects and ensure good signal integrity, PCB designers and manufacturers use various techniques and best practices. However, some design elements, such as via stubs, can still cause issues that need to be addressed.

A via stub is an unintentional section of the via that extends beyond the signal layer, creating a small impedance mismatch and a reflection of the signal. This reflection can cause signal degradation, increased jitter, and other problems that reduce signal integrity. To avoid these issues, designers can use the back drilling process.

What is the "Back Drilling"? And how does it work? Clik below link to read more...

Everlast Win Electronics CO., Ltd. offers single-sided PCB, double-sided PCB, multi-layers PCB including: RPCBs/ Multilayer PCBs, FPCBs-Flexible PCBs, Rigid-Flex PCBs, HDI PCBs, Special Material PCBs

07/01/2023

Customer always ask the PCB warranty period; generally speaking, we'll say it's around six months. In fact, different surface finish has different warranty period. Please kindly take your time to the below link for your reference.

Everlast Win Electronics CO., Ltd. offers 100G-Networking, 5G ROUTER, 5G-Networking including: RPCBs/ Multilayer PCBs, FPCBs-Flexible PCBs, Rigid-Flex PCBs, HDI PCBs, Special Material PCBs

30/12/2022

Wish everyone has a Happy 2023!!!
Happy New Year 兔 You!!! :)

Our office will be closed from Dec. 31 to Jan 2nd and will resume on January 3rd.

16/12/2022