FOUP load ports and their door opener mechanisms for 300 mm wafer tools · SEMI E15.1 load port dimensions, E62 front-opening interface, E84 carrier handoff signals, latch keys and vacuum pads, door elevator and wafer mapping, open and close times, purge and reliability
A load port door opener — the FOUP opener — is the mechanism at the front of a 300 mm wafer process or inspection tool that docks a front-opening unified pod (FOUP), unlocks and removes its door, lowers the door out of the way so the tool's robot can reach the wafers, and closes the pod again afterwards, while sealing the tool's clean mini-environment from the fab. Ask three things first: which SEMI interfaces and carrier types the port must accept, how the FOUP is loaded (overhead transport or manual) and signalled, and what open and close time, cleanliness, purge and reliability the tool needs.
FOUP load ports and their door-opening mechanisms for 300 mm semiconductor process and metrology tools: dock plate, port door with latch keys and vacuum pads, door elevator, wafer mapping sensor, carrier sensing, handoff I/O and purge options. FOUPs and wafer carriers themselves, equipment front-end module robots, overhead hoist transport systems, 200 mm SMIF openers and building or vehicle door openers are outside this page except where compared.
CNFX editorial research · Sources checked October 11, 2026 · 5 sources
SEMI E15.1 defines dimensional requirements for the load ports of 300 mm wafer process and inspection equipment, to give a uniform physical interface between equipment and the factory, to allow automated carrier transport and to meet ergonomic requirements for manual loading; 200 mm and smaller equipment is covered by SEMI E15. SEMI E62 (front-opening interface mechanical standard, FIMS) specifies the tool side of the interface between a tool and a front-opening box, specifying only the physical interface with no materials requirements or micro-contamination limits. The SEMI store lists both documents as inactive, so confirm which revision your tool and fab specify. [1][2]
SEMI E84 defines the enhanced parallel I/O signals used to hand carriers between production equipment (the passive side) and automated material handling such as overhead hoist transport, AGVs and RGVs (the active side), including load port assignment signals, handoff sequences and timing diagrams, connector and pin assignment, and the size of the interface sensor unit located at an E15.1 load port; it adds continuous and simultaneous handoff and error detection to the earlier SEMI E23 interface, and only controls the handoff, not the factory host. [3]
Give the supplier the wafer size and carrier types (FOUP makes and models), applicable SEMI standards and revisions, loading method (OHT, AGV or manual) and E84 requirements, carrier ID reader type, tool host interface, mini-environment and purge requirements, and number of ports per tool.
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Specify the door mechanism, timing and reliability
A Hirata patent for a FOUP opener (US7976262B2, filed 2006) describes a dock plate and dock moving mechanism, a port door advanced and retreated toward the FOUP, and a port door/sensor elevating mechanism driven by a servo motor and screw shaft that lowers the port door, while it holds the FOUP door, together with a mapping sensor. The port door carries two vacuum pads connected to a vacuum source to hold the FOUP door and latch keys to unlock it; the drive parts are housed on the side of the port plate away from the mini-environment so they are isolated from the clean side, and the patent's own improvement is a front surface panel that can be removed for maintenance without breaching the mini-environment. [4]
TDK's TAS300 Type-E4 FOUP load port data sheet lists a 70 mm Y-axis (FOUP forward and back) stroke to the SEMI standard with ±0.1 mm repeat accuracy, FOUP open and close operations of 10 s each, compatibility with 300 mm FOUPs to SEMI E47.1 and E62, detection of FOUP presence, normal position, docking, FOUP door and wafers protruding (wafer flying out) plus hand-pinch prevention, options for a carrier ID reader and optical I/O, front, bottom and hybrid N2 purge options, an air-cushion system for docking FOUPs of different makers, and a mean cycles between failures (MCBF) of 500,000. [5]
Editorial calculation: at 10 s to open and 10 s to close, door operation adds about 20 s to each carrier visit; a port serving 40 carriers a day (assumption) spends about 800 s, or roughly 13 minutes, opening and closing doors. Compare this with the tool's process time per FOUP when setting the number of ports. [5]
Ask for open and close times measured from dock to wafer-access ready, dock stroke and repeatability, latch key and vacuum pad design, door elevator drive, mapping sensor type and accuracy, sensing and interlocks, particle performance data and test method, purge flow and nozzle options, utilities (air, vacuum, N2, power), MCBF basis and maintenance access.
Fill the specification fields with values for your tool
A load port quotation needs values for your tool and fab. The table explains each field, gives published values where a reviewed source states them, and says what to obtain from the supplier.
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
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Compiled and source-reviewed by the CNFX editorial team.
Published product pages show what a company offers, not tested performance. Confirm the legal seller, factory, SEMI compliance and scope for your order. How we source and review
· Page last updated 13 October 2026
Buyer questions
Which SEMI standards apply to a 300 mm load port?
E15.1 for load port dimensions, E62 for the front-opening mechanical interface on the tool side, and E84 for carrier handoff I/O with automated transport. [1][2][3]
How does a load port remove the FOUP door?
In one design the port door holds the FOUP door with vacuum pads, unlocks it with latch keys and lowers it with a mapping sensor. [4]
How long does a load port take to open a FOUP?
One maker lists 10 s to open and 10 s to close. [5]
Sources and what still needs a direct check
Sources checked 2026-10-11. The SEMI pages are public summaries of standards; the Hirata patent and TDK data sheet describe single makers' designs. Compliance and performance for your tool must come from the supplier offered.
