Within the DC Power Supply for Sputtering segmentation the type dimension separates four principal architectures: linear, switch‑mode, programmable and modular units. Linear supplies, built on a transformer‑rectifier core, provide the lowest output ripple and highest voltage stability, which sustains high‑precision thin‑film processes despite their lower conversion efficiency and larger physical footprint. Switch‑mode supplies employ high‑frequency power conversion, delivering efficiencies above 85 % and compact enclosures; they therefore dominate volume‑driven lines where energy cost and space constraints are decisive. Programmable supplies embed digital control loops that permit on‑the‑fly adjustment of voltage, current and waveform parameters, extending market reach into multi‑target sputtering systems that require rapid recipe changes. Modular supplies consist of interchangeable blocks that can be scaled in voltage, current and channel count, supporting OEMs designing custom sputtering rigs. Revenue contribution aligns with functional demand: linear units roughly 20 % of market value, switch‑mode 45 %, programmable 25 % and modular 10 %.