Laser Direct Imaging (LDI) Resist
激光直写光刻替代丝印制版
标签：LDI, 激光直写, 感光膜, 制版
激光直写（LDI）设备直接按矢量图对贴膜铜板曝光，省去丝网菲林制作，改稿零成本、最小线宽 50 μm。工作室级方案：用 405 nm 激光模块（1–2 W）+ galvo 振镜改装，或购买桌面 LDI（约 2–5 万元）。曝光后 1% Na2CO3 显影 30–60 s、40 ℃ FeCl3 蚀刻。对比传统油墨丝印：边缘锐度提升 3–5 倍，特别适合细密文字与渐变网点纹样。
Laser Direct Imaging exposes dry-film copper straight from vector files—no film or screens, free revisions, 50 μm minimum linewidth. Studio options: retrofit a 1–2 W 405 nm laser with galvo heads, or buy a desktop LDI (¥20–50k). Develop in 1% Na2CO3 for 30–60 s, etch in FeCl3 at 40 °C. Edges are 3–5× sharper than screen-printed ink—ideal for fine lettering and halftone patterns. ---