• Leading The Green Energy Revolution.

    Powering the world with a viable alternative

  • Ambition Drives Us.

    Shift from a focus on quantity to quality FY2025

  • Powering A Brighter Tomorrow.

    Keeping homes & businesses running 24/7

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RENEWABLE ENERGY.

Our extensive investments in research and development in renewable energy are helping to reduce the world’s reliance on fossil fuels.

POLYCRYSTALLINE SILICON.

Polysilicon is the basic core material for Solar PV industry, positioned at the very first step of the PV value chain (ingots → wafers → cells → modules → solar power generation systems). OCI TerraSus provides 10-Nine (99.99999999% purity) Polysilicon for solar power generation.

CONTRIBUTING TO THE COMMUNITY.

OCI TerraSus employs more than 1,000 people in Sarawak, Malaysia, who come from 27 ethnic backgrounds in the country’s largest state.

POWERING A BRIGHTER TOMORROW.

The OCI TerraSus facility in Sarawak produces 35,000 metric tonnes of polysilicon annually, equivalent to 11.7 GW of solar power generation, which provides enough electricity to power a brighter tomorrow.

Welcome to OCI TerraSus.

OCI TerraSus (formerly known as OCI M) is part of the OCI company of Korea, a leading global green energy and chemical company founded in 1959. We have a corporate culture that is built on a non-negotiable foundation of ‘best in class’ business ethics and transparent management.

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Total Visitor: 256253

35,000 tonnes

Solar-grade

1,033 employees

in Malaysia

4 branches

in Malaysia

WORKING WITH OCI TerraSus?

We’re always on the lookout for good talent to work with us at OCI TerraSus in Sarawak. For successful applicants we offer attractive packages and a unique working environment as well as training opportunities to many of our people. If you would like to join us, please visit our careers page to see what vacancies we have.

Grow stronger
Grow Faster
Compete with others
Copyright © 2025 OCI TerraSus Sdn. Bhd. (200901025672 (868774-M)). All rights reserved.

Establishment of OCI Tokuyama Semiconductor Materials Sdn. Bhd.

OCI TerraSus Sdn. Bhd. is pleased to announce the establishment of OCI Tokuyama Semiconductor Materials Sdn. Bhd. (“OTSM”). OTSM is a joint venture company with Tokuyama Corporation of Japan, for the production and sale of semiconductor-grade polycrystalline silicon ("polysilicon") semi-finished products. The establishment was completed as of 8 July 2025.

This establishment will be followed by a groundbreaking ceremony for the OTSM semiconductor-grade polysilicon plant in Samalaju Industrial Park, Bintulu, scheduled for 16 July 2025.

The joint venture aims to strengthen the global semiconductor supply chain while contributing to environmental sustainability through efficient energy use and lower carbon intensity in production.

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