Disclaimer

Wafer Note is an educational notebook about how chips are made and about common mix-ups in that work.

Nothing on this site is professional advice, legal advice, or investment advice. Nothing here is a recommendation to buy, sell, or hold any product, service, or security. Nothing here is a substitute for a process spec, a safety rule, or a conversation with a qualified professional who can see your facts.

Halo writes from public process knowledge and from the ordinary language of the shop floor. A vendor’s node name, a probe flow, or a yield report at a specific plant can differ from the sketch in a note. If you are making a decision that depends on a number, use the number from the responsible engineer or the controlling document.

Pages can be wrong, incomplete, or out of date. Read them as explainers, then check the source that actually governs the lot.