Toray Industries announced that STEMCO, a joint venture between Toray and Samsung Electro-Mechanics for printed circuit boards and electronic components, will expand power inductor coil production facilities.

Power inductor coils. (Source: STEMCO)

The first production line started operation in April 2025. STEMCO will buy land next to the headquarters for a second line, which will roughly double power inductor coil manufacturing capacity to meet growing global demand. Operations are expected to start in fall 2028.

Samsung Electro-Mechanics’ power inductors are compact and deliver low resistance at high frequencies, contributing to package designs that cut power losses. Combining Samsung Electro-Mechanics’ and STEMCO’s plating technologies has enhanced production efficiency.

Samsung Electro-Mechanics accounts for a high share of the market for thin-film power inductors, which it has positioned as a strategic growth business.

STEMCO has amassed plating and precision microfabrication technologies in manufacturing chip-on-film flexible printed circuit boards for televisions and mobile products. It drew on those technologies to begin supplying power inductor coils to Samsung Electro-Mechanics in February 2025. The latter company employs these coils in its thin-film power inductors, for which it decided to boost production capacity to meet strong demand.

What is power inductor?

A power inductor comprises a coil-shaped circuit molded in magnetic material. It converts voltage and stabilizes current. Thin-film types can curb power consumption and heat generation during high-frequency switching.

What is the application of power inductor?

Power inductors contribute to cutting power consumption in AI-enabled smartphones, AI data centers, and autonomous driving-related automotive equipment. As of the end of June 2026, Toray research estimated that the thin-film power inductor market will grow about 18% annually.