The POLYPLUS EQ series from Tokuyama Corp. - CMP slurry tuned for advanced logic nodes

Reviewed: ad hoc news B2B & Pro desk. Edited and checked on 2026-06-23, 01:44. Details in the imprint.

POLYPLUS EQ from Tokuyama Corp. sits in stainless-steel tanks next to humming CMP tools, its faintly chemical smell mixing with clean-room air while engineers watch the polish rate graphs inch across the monitor. This slurry is built for unforgiving advanced logic lines. One wrong parameter, and a few million euros in wafers are at stake.

What POLYPLUS EQ is built for

Tokuyama developed the POLYPLUS EQ series as a family of CMP slurries for polysilicon layers on 200 mm and 300 mm wafers, aimed at logic, memory, and power devices. The slurry targets stable removal rates and low dishing on narrow features, which become critical at sub-micron design rules.

According to Tokuyama, the POLYPLUS portfolio spans multiple formulations for polysilicon and related films, with the EQ line tuned for finer pattern fidelity and tighter process windows than older generations. Product manager Kenji Takahashi describes the aim in internal presentations as “making line-edge roughness a solved problem instead of a daily fight”.

How the slurry behaves on the pad

On the pad, engineers want POLYPLUS EQ to feel predictable: the friction stays even, and there is no sudden grab when the wafer crosses dense-to-isolated pattern boundaries. Tokuyama highlights tailored abrasive size, oxidizer content, and surfactant mix to keep pad glazing under control and extend pad life.

For fabs chasing cost per wafer, consumables matter. CMP slurries can represent a significant share of CMP step cost, and process engineers compare removal rate per liter, defectivity, and post-CMP cleaning time when they evaluate a candidate slurry. A stable polysilicon slurry can reduce rework lots and tool downtime, which is why niche products like EQ matter more than their volume suggests.

Position in Tokuyama's semiconductor portfolio

POLYPLUS EQ sits alongside other Tokuyama semiconductor materials, including photoresists, spin-on-glass, and high-purity isopropyl alcohol, that target logic and memory fabs in Japan and Asia. President Shigeki Mori has repeatedly framed advanced materials as a growth engine that should offset more cyclical commodity chemicals.

In the company’s medium-term plan, Tokuyama highlights semiconductor and electronic materials as one of its “growth businesses” with investment earmarked for polishing materials and other high-margin segments. That focus puts specialist CMP slurries like POLYPLUS EQ directly in the corporate spotlight, even if the product will never appear on a consumer price tag.

Where it fits in the supply chain

From a fab’s perspective, a polysilicon CMP slurry competes with offerings from US and European suppliers, but Japanese materials vendors retain strong positions domestically and with long-term partners. Qualification cycles are long, and once a slurry clears reliability and yield hurdles, process engineers tend to stick with it for a node’s lifetime.

For investors, the crucial point is not whether POLYPLUS EQ wins a headline contract, but that Tokuyama can consistently design and scale products in this niche. The more often process engineers quietly choose its slurries over rivals, the more resilient Tokuyama’s earnings mix becomes.

Semiconductor focus and the stock

All told, POLYPLUS EQ is another example of how Tokuyama is pushing deeper into the semiconductor clean-room rather than relying only on bulk chemicals. On the Tokyo Stock Exchange, Tokuyama shares (ISIN JP3870000002) trade under the code 4043 in Japanese yen, giving investors direct exposure to this materials strategy.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.