Glyph reference

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

• GDSII File Format Reference — A from-scratch reference to the GDSII stream format — its record catalogue, library and cell structure, database units, and the 8-byte excess-64 REAL.
• GDSII vs OASIS — A plain-language comparison of the GDSII and OASIS layout stream formats — origins, file size, compression, adoption, tool support, and which one to hand off.
• DXF vs GDSII — DXF and GDSII are drawing-interchange formats for different domains — general CAD drawings vs hierarchical IC and photomask layout. Here's how they differ.
• GDSII to SVG — How GDSII-to-SVG conversion works — polygons to paths, layers to groups, database units to a viewBox — and how to export a .gds file as SVG or PNG in Glyph.
• Mask Layout Glossary — A plain-language, alphabetized glossary of photomask and IC-layout terms — cell, hierarchy, layer, DRC, GDSII, OASIS, SREF/AREF, and boolean ops.