Valley Services Electronics

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PCB layout constraints

Microstrip vs. Stripline: Transmission Line Comparison

As signal speeds increase on printed circuit boards, their potential for emitting or being victimized by noise and interference intensifies. Layout steps are necessary to clear the signal’s pathways, including arranging the board stackup in microstrip or stripline configurations to achieve the best signal integrity. This setup protects sensitive high-speed signals from much noise and…

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Time Domain Reflectometry: PCB Defect Detection

During PCB layout, designers typically have to indicate the impedance of traces to ensure a proper balance of low-loss characteristics and power-handling capabilities. Before layout, the designer determines the trace width in some field solver software based on the desired impedance and other stackup factors like the surrounding substrates‘ dielectric constant(s) and the distance between…

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The characteristic impedance of transmission lines starts with the board stackup.

Solder Mask Expansion Ensures Solder Joint Reliability

Even small-lot PCB manufacturing relies on automated solder deposition processes to expedite the assembly process while providing greater consistency in solder application/joint reliability. Solder masking is necessary to prevent unintentional bridging of exposed copper and enhance the reliability of copper features that do not require atmospheric exposure. Using a carefully cut stencil, manufacturers apply an…

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The characteristic impedance of transmission lines starts with the board stackup.

Fine-Pitch PCB Assemblies for HDI Design

High-density pinout components using a package-on-package (PoP) construction, most notably ball grid arrays (BGAs), feature pitch (pin-to-pin distances) much smaller than historical standards. Given their proliferation in modern electronics due to their broad functionality, designers and manufacturers have had to adapt processes to accommodate the tighter pitches. Fine-pitch PCB design focuses on how layout and…

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AI Server Rack: Improve Service Life

AI is the new paradigm shift within businesses, offering an exciting level of automation and creation tools that are revolutionizing industries. As exciting as this development is, there’s been less concern about the changes in the data center infrastructure necessary to support these complex system architectures. AI server racks have additional considerations and concerns that…

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