THE COMPONENT SIGNAL

Weekly supply chain intelligence for electronics engineers and procurement teams. By POCONS USA.

Issue #001 · Monday, January 6, 2026

POCONS manufactures board-level EMI shields, clips, and custom metal stampings. Engineering in Suwon, Korea. Production in Vietnam. US operations in San Diego. We sit inside the supply chain we're reporting on — which means this intel comes from a manufacturer's vantage point, not a trading desk.

South Korea's petrochemical sector is in triage mode. The Strait of Hormuz closure severed ~77% of Korea's naphtha import route. LG Chem shut down its 800K-tonne/year Yeosu cracker. Yeochun NCC declared force majeure. Industry-wide inventories: roughly two weeks.

Why this matters to you: Samsung and SK hynix control ~70% of global DRAM and 80% of HBM production. Their fabs depend on Korean-processed chemicals. If naphtha supply doesn't stabilize by mid-April, expect memory allocation tightening on top of already crisis-level DRAM pricing (+95% QoQ in Q1). A temporary US sanctions waiver allowed one Russian naphtha shipment — but it expires April 11. After that, the math gets worse.

Metals

This Week's Rotating: MLCCs

Bottom line: MLCC pricing is entering an upcycle not seen since 2018. Both Murata and Samsung Electro-Mechanics raised prices April 1. Yageo and Walsin expected to follow. If you haven't locked pricing on high-cap or automotive MLCCs, you're buying at the ask.

What they make: MLCCs, power inductors, FC-BGA substrates, camera modules. World's #2 MLCC manufacturer behind Murata. Headquarters: Suwon, Korea. Major fabs in Busan (MLCCs) and Sejong (substrates).

Why US buyers should know them: Samsung Electro-Mechanics isn't just a component vendor — they're the canary in the passive component mine. When SEM raises MLCC prices, the entire industry follows within weeks. Their 2kV X7R MLCC family (released 2025) is the benchmark for 800V SiC inverter designs, and their FC-BGA substrates are the second source for AI server packaging behind Ibiden.

Current state: Hana Securities projects SEM will hit spare capacity limits by H2 2026, requiring expansion. Their MLCC and FC-BGA divisions are in simultaneous upcycles — a rare alignment that hasn't happened since the 5G build-out. Yuanta Securities calls it "a phase where aggressive pricing is justified."

The POCONS connection: We've worked alongside SEM's component ecosystem for 20+ years. When their MLCCs go on allocation, the boards they populate still need shields. Understanding SEM's capacity signals helps us — and our customers — plan ahead.

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  Korea semiconductor exports hit $30B in a single month (March). An all-time record, driven by AI memory demand. Samsung and SK hynix shipped record HBM4 volumes to NVIDIA and AMD despite the naphtha crisis. But Korean trade officials warn: if petrochemical feedstock remains constrained through April, Q2 output could take a hit that no amount of demand can offset. Source: KED Global

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  South Korea buys Russian naphtha for first time since Hormuz closure. LG Chem imported 27,000 tonnes under a temporary US sanctions waiver (expires April 11). This single shipment keeps one cracker running for weeks, not months. The Korean petrochemical chain — which feeds semiconductor fab chemicals, PCB laminates, and solder paste resins — is operating on a two-week buffer. Every electronics BOM with Korean-sourced content has exposure here. Source: The Next Web / Reuters

When you place decoupling MLCCs more than 5 mm from an IC's power pin, the trace inductance (~1 nH/mm) can create a resonant loop that amplifies noise at the LC resonant frequency rather than suppressing it. For a 100 nF 0402 MLCC with 3 mm of trace, the self-resonant frequency drops to ~80 MHz — right in the FM broadcast band.

Try this: Place your highest-value decoupling cap within 1 mm of the power pin via, and route the return path on the adjacent layer directly beneath. If board real estate forces you further out, add a second smaller cap (1–10 nF) at the pin and move the bulk cap. Two caps, properly placed, outperform one expensive cap at a distance. Your EMC scan at 100 MHz will show the difference.

POCONS USA — Direct manufacturer of board-level EMI shields, clips, and custom stampings. Engineering: Suwon, Korea. Production: Vietnam. US Operations: San Diego. poconsusa.com

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