Semi E72

SEMI E72 defines Equipment Footprint, Height, and Weight, the standard that specifies how a vendor must report a tool's physical floor footprint, overall height, and total weight in a consistent, verifiable format — the three physical dimensions a fab's facilities team needs to confirm a tool actually fits a target bay before it's purchased, distinct from SEMI E26's radial footprint concept, which is specific to cluster-tool handler/module configurations rather than equipment in general. Without a standardized reporting format, one vendor's footprint number might include service-access clearance and another's might not, making a side-by-side comparison between competing tools unreliable exactly where a fab needs it most: confirming the tool clears a specific bay's floor space, ceiling height, and floor-loading capacity.

Vendor reports footprint, height, weight
SEMI E72 standardized format, not ad hoc numbers
SEMI E70 accommodation review checks these numbersSame reporting format across every competing vendor
Footprint vs available floor space
Including or excluding service access, clearly stated
Height vs ceiling clearance, weight vs floor loading
Both verified before the tool is purchased
Tool physically fits the target bay, confirmed in advance
Not discovered when the tool doesn't clear the doorway

E72's weight specification matters for a reason that's easy to overlook: fab clean-room floors are typically raised access floors with a defined load-bearing capacity per square foot, and a heavy tool concentrated on a small footprint can exceed that capacity even when the floor area itself is plentiful — a risk that only a standardized weight-and-footprint-together report makes visible during planning, rather than during an actual structural failure. This is exactly the data SEMI E70's accommodation review consumes: E70 is the process that checks a tool against a specific bay's real constraints, and E72 is what makes sure the footprint, height, and weight numbers going into that check are reported the same way by every vendor, so the comparison between candidate tools for the same bay is actually meaningful rather than an artifact of inconsistent vendor reporting conventions.

SEMI E72 — Three Numbers, One Format footprint, height, and weight reported consistently across every vendor Tool Footprint — floor space, with/without service access stated Height Wt Total weight — checked against floor loading

E72's standardized numbers are the specific physical inputs SEMI E70's broader accommodation review consumes, which in turn depends on SEMI E6's documentation requirement having delivered those numbers in the first place — a chain running from reporting standard, through facility checking process, back to the underlying documentation mandate.

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