Semiconductor / for fabs
Fab Cybersecurity and SEMI Compliance
A structured assessment of your fab against SEMI E187, E188, and E191, scoped around yield, uptime, and the IP that makes your process worth protecting.
Best forIDMs, foundries, and OSAT facilities that need a defensible security posture and evidence of SEMI compliance for customers and regulators.
Service overview
Security built for the cleanroom, not adapted to it
A semiconductor fab is not a normal OT environment. Process recipes worth billions live alongside toolsets running operating systems that went end-of-life a decade ago, and a day of unplanned downtime is measured in tens of millions. Generic OT security approaches fail here because they do not account for the yield-sensitive nature of fab operations or the complexity of equipment supplier maintenance relationships.
Our fab assessment maps your environment against SEMI E187 (fab equipment security), E188 (malware-free equipment), and E191 (computing-device cybersecurity status reporting), combined with IEC 62443 zone and conduit architecture. The output is a compliance position you can show customers and a remediation roadmap sequenced around your production calendar.
What we assess
- Fab equipment security posture against SEMI E187 requirements
- Equipment intake and supplier maintenance processes against E188
- E191 status reporting and OS inventory across the tool fleet, with a patch and AV strategy for current and legacy toolsets
- Network segmentation between fab, facilities, and enterprise zones
- Remote access paths used by equipment suppliers and field service
- IP protection controls around recipes, process data, and MES
Our approach
Engagement methodology
The steps of the engagement, designed around the operational constraints of live industrial environments.
Scoping and fab walkthrough
We align on scope, production constraints, and access protocols, then conduct a structured walkthrough of fab, sub-fab, and facilities areas with your equipment and IT teams.
Passive asset and network discovery
SPAN-based traffic capture across fab network segments builds a complete inventory of tools, controllers, and connections without touching a single production system.
SEMI E187/E188/E191 gap analysis
Every tool group and process is mapped against the applicable SEMI requirements and IEC 62443 controls, with findings rated by both risk and compliance impact.
Supplier and intake process review
We review how equipment enters your fab and how suppliers maintain it: intake validation, media controls, remote sessions, and contractual security obligations.
Roadmap and customer evidence package
You receive a remediation roadmap sequenced around production windows plus the documentation package customers request for SEMI compliance verification.
Common questions
Frequently asked questions
Talk to RelyBlue
Ready to discuss Fab Cybersecurity and SEMI Compliance?
An honest conversation about your OT environment. No sales pressure, no fear tactics.
- You talk to a senior advisor, never a salesperson