In printed circuit board (PCB) design and manufacturing, board thickness might seem like a basic parameter. But it has profound effects on mechanical strength, electrical behavior, thermal performance, manufacturability, and reliability. Choosing the right thickness—and controlling its uniformity—is critical to delivering a high-quality PCB. In this article, we dive into why thickness matters, how to optimize it, and how SQPCB approaches this in its production. Why PCB Thickness Matters 1. Mechanical Strength & Rigidity A thicker board is more resistant to bending, warping, and mechanical stress. This becomes especially important in applications with vibration, shock, or flexing (e.g. automotive, industrial, aerospace). Too thin a board can lead to cracks in traces, fractures, or delamination. 2. Electrical Performance & Impedance Control Board thickness directly influences the dielectric spacing between signal layers and ground planes. Any variation in thic...
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