Samsung Electro-Mechanics disclosed on May 20, 2026, that it had signed a contract worth 1.557 trillion won — approximately $1 billion — to supply silicon capacitors to an undisclosed U.S. technology company developing next-generation AI chips. Deliveries run from January 1, 2027 through December 31, 2028, making this the company's first large-scale, long-term order since designating silicon capacitors a core new business for the AI era. Shares of Samsung Electro-Mechanics (KRX: 009150) surged 10.46% on May 21 to a record 1,172,000 won, briefly touching 1,219,000 won intraday — an all-time high, as multiple Korean brokerages raced to raise their price targets on the stock.
Why AI Chips Need Silicon Capacitors
As AI server chips grow larger and more power-hungry, delivering clean, stable power directly to the die has become one of the binding engineering constraints in semiconductor packaging. A silicon capacitor is an ultra-compact passive component built on a silicon wafer substrate rather than a conventional ceramic body. It sits inside the advanced semiconductor package — directly adjacent to a graphics processing unit (GPU) or high-bandwidth memory (HBM) stack — where it manages transient power noise at the precise location it originates, before that noise can propagate through the circuit. AI server packages are particularly susceptible to performance degradation or errors caused by sudden power fluctuations; silicon capacitors address that vulnerability by placing decoupling capability at the chip level itself.
Compared with multilayer ceramic capacitors (MLCCs), silicon capacitors offer dramatically lower equivalent series resistance (ESR) and equivalent series inductance (ESL) — industry reporting cites resistance values more than 100 times lower than equivalent MLCCs. That advantage translates into tighter high-frequency decoupling and reduced voltage droop in the dense, multi-die packages that characterize modern AI accelerators and HBM stacks.
Samsung Electro-Mechanics Breaks Into Concentrated Market
The silicon capacitor market has historically been dominated by a small number of players, including Japan's Murata Manufacturing and Taiwan's TSMC, because of the demanding customer qualification process and the manufacturing complexity involved. That concentration exists because producing silicon capacitors at the densities and tolerances required for AI chip packaging demands deep-trench process expertise found only in advanced semiconductor fabs and a handful of specialized component manufacturers.
Samsung Electro-Mechanics gained its foothold by leveraging process capabilities built across two existing businesses: its multilayer ceramic capacitor (MLCC) operation — one of the world's largest — and its flip-chip ball grid array (FC-BGA) semiconductor package substrate business. Those divisions required years of investment in ultra-fine deposition and layering techniques that translate directly into silicon capacitor production. The company began supplying silicon capacitors to Marvell Technology in June 2025, marking its first entry into the AI chip component market. The new contract, at 13.8% of Samsung Electro-Mechanics' annual revenue, represents graduation from qualification supplier to strategic partner at a scale the market has not previously seen from this company.
"With the FC-BGA market entering a price-hike cycle on favorable conditions, demand is rising for shorter signal transmission paths," Kim Min-kyung, an analyst at Hana Securities, said after the announcement. "The company's technological capabilities in passive components such as MLCCs and silicon capacitors will serve as a differentiation point versus other substrate makers." KB Securities analyst Lee Chang-min added that Samsung Electro-Mechanics plays a "fabless" role in the silicon capacitor business — handling design and testing while outsourcing fabrication — meaning that "revenue can be large and grow quickly without additional manufacturing facility investment."
Silicon Capacitor Market: $1.8B Today, $3.4B by 2035
The global silicon capacitor market was valued at approximately $1.8 billion in 2025 and is projected to reach $3.4 billion by 2035, growing at a compound annual growth rate of 6.8%. The primary driver is the continued expansion of AI server infrastructure: as GPU and HBM packages scale in area and layer count, the surface area requiring power integrity management grows correspondingly, and board-mounted capacitors can no longer deliver the transient response those packages require.
Empower Semiconductor, a California-based rival, introduced three new embedded silicon capacitors for AI and high-performance computing processors in February 2026, signaling that the competitive field is broadening beyond established Japanese and Taiwanese players. Samsung Electro-Mechanics' contract represents a scale of commercial validation that moves the company from contender to confirmed supplier in the most demanding segment of the market.
Undisclosed Customer, Industry-Wide Implications
Samsung Electro-Mechanics has not disclosed the identity of its U.S. customer, citing confidentiality terms in force until the contract expires. Industry observers believe the buyer to be one of the major U.S. technology companies, based on the contract's scale and the company's existing relationships. The surge article confirms that Samsung Electro-Mechanics' major clients already include Nvidia, AMD, Amazon, and Marvell — all of which are active in AI accelerator development and procurement.
On the FC-BGA front, the company secured first-vendor status for the Groq3 language processing unit, an inference accelerator designed for Nvidia's next-generation platform, with mass production slated for the second quarter of 2026. It has also backed its AI component push with a $1.2 billion facility investment in Vietnam, where demand levels currently exceed production capacity by more than 50%, according to CEO Chang Duck-hyun.
Looking ahead, Samsung Electro-Mechanics plans to broaden its silicon capacitor customer base beyond AI servers into autonomous driving systems, mobile devices, and other high-performance computing segments. Japan's Ibiden and Shinko Electric currently hold more than 70% of the FC-BGA substrate market — the same asymmetry that defined silicon capacitors before Samsung's entry. The silicon capacitor contract suggests the company intends to challenge that concentration on two supply-chain fronts simultaneously.
"This contract is an important milestone for Samsung Electro-Mechanics as we cement our position as a total solution provider of core components for the AI era," Chang said. "We will continue to expand our product lineup and strengthen cooperation with global customers."
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