About

Wafer Note is an English-language notebook on semiconductor process. It covers how a node name is assigned, what a step on the line actually does to the wafer, and why two plant percentages get treated as one meter.

Dawn writes the notes. HALOX Co. publishes the site.

Lanes

Process is geometry and naming: contacted poly pitch, metal pitch, cell height, and why the integer on a slide is not a ruler reading.

Fab floor is a step as it runs: what touches the wafer, what the tool is doing, and what file or lot state leaves the station.

Mix-ups is the pair of words that share a percentage sign and do not share a denominator — yield against utilization, wafer sort against package test, a node name against a transistor size.

The notes are explainers. They are not a process of record and not a substitute for the spec that governs a lot.