Showerhead – The Indispensable Gas Distribution Core in Semiconductor Manufacturing

In semiconductor fabrication processes, uniform gas distribution directly determines the quality and consistency of thin-film deposition. The Showerhead, also known as a gas distribution plate or gas shower plate, is precisely the core device in this critical step.

 

High-Precision Micropores Define Process Success

The essence of a Showerhead lies in its micropore structure. Taking AMTD, an industry-leading enterprise, as an example, the Showerheads it manufactures feature a micropore diameter range of 0.2–6 mm, micropore uniformity of 3σ ≤ 3 μm, dimensional tolerance controlled within ±0.01 mm, and hole wall roughness Ra ≤ 0.4 μm. This extreme precision ensures that gas is uniformly distributed across the entire wafer, guaranteeing high uniformity and consistency of the film layer — a requirement that is vital for mass production of advanced-node chips.

 

Four-Stage Micropores Meet Diverse Demands

Depending on different gas flow distribution requirements, Showerhead micropores are machined in four forms: straight hole, 2-stage hole, 3-stage hole, and 4-stage hole. The maximum diameter-to-depth ratio can reach ≤50:1, meaning gas distribution remains precisely controllable even in extremely deep micropores. This ≤50:1 aspect ratio capability enables Showerheads to adapt to a wide range of process scenarios — from low-flow precision distribution to high-flow uniform coverage.

 

Multi-Composite Surface Treatment Ensures Long-Term Reliable Operation

Semiconductor manufacturing demands extremely high cleanliness. Showerhead surfaces undergo multiple processes including sandblasting, anodizing, brush plating with nickel, and electrolytic polishing to enhance corrosion resistance, wear resistance, and service life. These multi-process treatments — sandblasting, anodizing, brush plating with nickel, and electrolytic polishing — ensure the product delivers outstanding performance in wear resistance, corrosion resistance, conductivity, and cleanliness.

 

From straight holes to four-stage holes, from high-precision machining to multi-composite surface treatment, every evolution of Showerhead technology drives semiconductor manufacturing toward higher process nodes. AMTD, as an industry benchmark, is contributing to China's semiconductor core component supply chain with the strength of domestic precision manufacturing.