Semi E110

SEMI E110 specifies the physical placement, color coding, and function of the status-indicator lights and manual switches mounted on a 300 mm load port — the hardware a fab technician actually looks at and touches when standing in front of a tool, independent of whatever the host sees over SECS-II/GEM. E84's handoff signals and E87's carrier-state model tell the host software what the load port is doing, but neither standard says where on the load port chassis a technician should expect to find the "ready," "busy," or "error" light, or where the manual load/unload switch sits relative to it — E110 is the standard that makes the physical control panel itself interchangeable across vendors, the same way E83 makes the PGV docking flange interchangeable.

The reason this needed a standard distinct from E84 and E87 is that E84/E87 fix the meaning and timing of signals exchanged between the load port and the AMHS or host — they say nothing about the human-facing hardware a technician relies on when the automation itself is the thing being serviced or overridden. A fab running mixed-vendor tools on the same floor needs a technician who was trained on one vendor's load port to immediately recognize the indicator and switch layout on another vendor's load port without hunting for documentation, especially during manual intervention when the automated handoff has already failed and a person is standing at the equipment making a judgment call — E110 is what keeps that judgment call fast and consistent regardless of which company built the port.

E110 closes the one gap E84 and E87 leave open: a tool can be fully GEM-compliant and E84/E87-compliant and still confuse a technician if the physical panel is laid out differently from what they expect — E110 is the standard that makes the control panel itself, not just the protocol behind it, vendor-interchangeable.