Epec's Blog | Electronics Manufacturing Solutions

Printed circuit board (PCB) manufacturing relies on a coordinated combination of materials and processes to create reliable electronic circuits. Insulating substrates like FR-4 fiberglass-epoxy or specialized polymers provide mechanical strength and electrical isolation, while conductive copper layers are patterned using photoresists and chemical etchants.

The first time you hold a finished high-density flex circuit in your hands, it can feel a little surreal. You know how much circuitry is packed inside, how many tradeoffs were made, and how much risk sat in every design decision. Yet the finished product is thin, light, and deceptively simple. That contrast is what makes high-density flex design so rewarding and so challenging at the same time.

From a PCB manufacturing perspective, designing for testability focuses on ensuring the circuit board can be efficiently inspected and verified at scale without slowing down production or increasing costs.

When battery packs are placed into storage, it is easy to assume they will be ready whenever they are needed. In reality, a stored battery pack is still changing over time. The cells continue to self-discharge, the pack continues to age, and the storage environment can affect the condition of the pack long before it is installed into equipment.

When it comes to cable assemblies and wire harnesses, consistency is everything. A design might look perfect on paper, but without clear workmanship standards and acceptance criteria, the final product can vary from build to build. That is exactly why IPC/WHMA-A-620 exists.

At the conclusion of our webinar, Hidden Costs and Challenges of Offshore Battery Pack Manufacturing, we had several questions submitted to our presenter, Battery Product Manager Anton Beck. We compiled these into a readable format on our blog.

Overmolded cable assemblies are relied on in applications where failure is not an option. Industrial control panels, medical equipment, automotive sensors, laboratory instruments, and outdoor electronics all depend on strong strain relief, dependable sealing, and repeatable performance. Overmolding delivers that performance by encapsulating the connection point between the cable and its component interface, creating a unified structure that protects against moisture, vibration, abrasion, and general wear.

Just the same as rigid printed circuit boards (PCBs), flex PCBs sometimes encounter issues with space constraints. Devices get smaller, components become more numerous, and weight becomes an increasing concern. And while flex can be used to drop down the weight of a design, that only solves one of those three problems.

In today’s high-density electronics, designers are constantly balancing miniaturization with long-term reliability. One technology that makes compact layouts possible is the use of blind and buried vias, specialized interconnections that don’t completely pass through the board like traditional plated-through-holes.

Battery management systems (BMS) are safety devices integrated into battery packs to monitor the cells during charging and discharging phases. These systems can activate safety controls when problems arise while logging data that you can use to evaluate the cell's stability. When functioning properly, the BMS can improve the efficiency and longevity of the battery pack. Unfortunately, BMS design flaws may cause serious risks and failures to cells.