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Hydrogen Sulphide – The “Hidden Enabler” in Semiconductor Manufacturing – High Purification Remains the Greatest Hurdle
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Hydrogen Sulphide – The “Hidden Enabler” in Semiconductor Manufacturing – High Purification Remains the Greatest Hurdle

Hydrogen Sulphide – The “Hidden Enabler” in Semiconductor Manufacturing – High Purification Remains the Greatest Hurdle

Hydrogen Sulphide – The “Hidden Enabler” in Semiconductor Manufacturing – High Purification Remains the Greatest Hurdle

2026-06-28

Hydrogen sulphide (H₂S)– a name that may inspire caution – is indispensable in semiConductor fabrication.

In chip production, H₂Sis used primarily for doping and deposition. Its toxic and corrosive nature makes purification, filling, transport and handling extremely demanding, with purity requirements at ppb or even ppt levels. Market reports project tHeglobal high‑purity H₂S market to grow from USD 158 million in 2025 to USD 223 million by 2032, at 6.2% CAGR. The main growth drivers are semiconductor, flat‑panel display and photovoltaic expansions – all of which require ultra‑high‑purity gases for etching, deposition and cleaning.

However, the real picture is more complex:

  • Extreme technical barriers: H₂S purification is much more difficult than for many other electronic gases. It is immediately dangerous to life or health at just 100 ppm, and corrosive to equipment, requiring stringent controls from production to end‑use – a high entry threshold.

  • Concentrated supply: Global supply has long been in the hands of a few international firms. Similar to WF₆ and high‑purity ammonia, this product faces “bottleneck” risks. While some domestic players have started capacity expansion, overall self‑sufficiency remains low; import substitution is still in its infancy.

  • Escalating purity demands: As nodes progress below 3 nm, purity requirements have moved from ppm to ppb and now ppt. Each leap in purity demands simultaneous upgrades in purification technology, detection methods and quality systems.

For Chengdu Hongjin, H₂S is a crucial part of its specialty‑gas portfolio. Drawing on years of gas‑purification expertise, the company has built a complete system for H₂S production, filling and safety management. In an era of persistent global supply‑chain turbulence, the player that first achieves scalable high‑purity H₂S production and passes top‑tier wafer‑fab certification will secure a first‑mover advantage.