Glyph reference

Format and concept references for GDSII mask design, maintained by the authors of Glyph.

• GDSII file format reference — Records, cell structure, database units and the excess-64 REAL.
• OASIS (SEMI P39) layout files vs GDSII — File size, compression, tool support, and which one to hand to a mask shop.
• DXF vs GDSII — Units, layers, hierarchy and curves — what each format can hold.
• GDSII to SVG — Polygons to paths, layers to groups, and exporting a figure as SVG or PNG.
• Mask layout glossary — Cells, layers, DRC, SREF/AREF and other layout terms, A to Z.
• DXF editor — Open a DXF, edit it on the mask canvas, and save it as GDSII or as DXF again.