The Application dimension of the Gases for Semiconductor Equipment market is organized around five primary process groups: Etching, Deposition, Cleaning, Doping, and Inspection. Etching gases—such as fluorocarbon and chlorine‑based chemistries—enable pattern transfer and account for roughly one‑third of total demand, driven by high‑volume logic and memory fab lines. Deposition gases, including silane, ammonia, and metal‑organic precursors, support thin‑film formation for interconnects and dielectrics, contributing about 28 % of market revenue. Cleaning gases—hydrogen, oxygen, and plasma‑enhanced formulations—are essential for wafer surface preparation and represent close to 20 % of spend, reflecting stringent defect‑reduction standards. Doping gases, primarily phosphine and diborane, provide controlled impurity introduction for transistor channel engineering and generate roughly 12 % of the market size. Finally, Inspection gases, such as helium and nitrogen, facilitate metrology tools and occupy the remaining 7 %, underscoring the ancillary but critical role of gas‑based analytical equipment. This application‑centric taxonomy clarifies how each segment fuels overall market growth and informs the Gases for Semiconductor Equipment segmentation analysis.