# Yunnan Chihong subsidiary signs long-term supply deal for N-type indium phosphide substrates

Yunnan Chihong's subsidiary Yunnan Xin Yao Semiconductor Materials signed a long-term supply agreement with Applied Optoelectronics (AOI) for 4-inch N-type indium phosphide substrates, with AOI expected to purchase 180,000 pieces annually from 2027 to 2031, totaling 900,000 pieces.

- Type: Contract
- Announced: 2026-11-03
- Where: China
- Status: announced
- Capacity: 900,000 pieces over five years
- Products: 4-inch N-type indium phosphide substrates
- Sectors: [Semiconductors and Industrial Electronics](https://endata.com/sectors/semiconductors-electronics.md)

## Companies

- [Yunnan Chihong Zinc and Germanium](https://endata.com/companies/15396.md)
- [Yunnan Xin Yao Semiconductor Materials](https://endata.com/companies/15397.md) (supplier)
- [Applied Optoelectronics](https://endata.com/companies/15398.md) (customer)

## Sources

- [finance.cnr.cn](https://finance.cnr.cn/ycbd/20261103/t20261103_527861493.shtml), 2026-11-03: "云南锗业控股子公司云南鑫耀半导体材料有限公司与客户Applied Optoelectronics,Inc.签订《长期供货协议》。"

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.