How to Keep Legacy Inspection Systems Running
Semiconductor inspection systems are often used far beyond their original expected service life. Even when a platform is no longer actively supported by the manufacturer, it may still deliver the accuracy, throughput and process stability required for production.
Replacing a proven inspection system is not always the most practical solution. A new platform may require a significant investment, process requalification, software migration and production downtime. For many manufacturers, extending the lifetime of existing equipment is therefore both an economical and operationally sensible strategy.
The challenge is ensuring continued access to the components, knowledge and support required to keep legacy systems operational.
Why Legacy Inspection Systems Remain Important
Inspection platforms from manufacturers such as Rudolph Technologies, August Technology, Onto Innovation and KLA can remain an important part of semiconductor production for many years.
In many cases, the process itself has not changed enough to justify replacing a reliable system. The equipment may already be integrated into the production environment, qualified for specific applications and familiar to operators and maintenance teams.
Keeping an existing system running can help manufacturers:
- avoid unnecessary capital expenditure
- reduce the need for process requalification
- maintain established production workflows
- minimize disruption and implementation risk
- extend the useful life of valuable equipment
However, older systems require a more proactive approach to maintenance and spare-parts management.
Identify Critical Components Before They Fail
The first step is to identify the components that could cause significant downtime if they fail.
Typical critical components in semiconductor inspection systems include:
- industrial cameras and imaging modules
- frame grabbers and image-processing boards
- computers, hard drives and data-storage devices
- power supplies and amplifiers
- motors, drives and motion controllers
- robots, handlers and pre-aligners
- sensors, encoders and measurement devices
- optics, illumination systems and light sources
- pneumatic, vacuum and pressure components
- cables, connectors and electronic assemblies
Not every component needs to be kept in stock. The priority should be parts with long lead times, limited availability or a high impact on production.
A structured critical-spares list makes it easier to decide which parts should be stored internally and which can be sourced when required.
Record More Than Just the Part Number
A part number alone is not always enough to identify the correct replacement component.
Legacy equipment may contain different hardware revisions, connector types, firmware versions or customer-specific configurations. Two components with similar names may not be interchangeable.
For every critical part, document as much information as possible:
- manufacturer
- complete part number
- equipment model
- equipment serial number
- hardware revision
- firmware or software version
- connector configuration
- photographs of the component and label
- installation location within the system
This information significantly improves the chances of finding a compatible replacement and reduces the risk of purchasing the wrong component.
Monitor Obsolescence Proactively
Many inspection-system failures become difficult to resolve because the required part was discontinued years earlier.
Obsolescence management should therefore begin before a component fails. Review critical parts regularly and identify components that are:
- no longer manufactured
- approaching end of life
- only available through secondary markets
- dependent on outdated operating systems
- difficult to repair or replace
- associated with unusually long lead times
Where possible, secure spare units while they are still available. For especially critical components, it may also be useful to identify compatible alternatives or repair options in advance.
Maintain Computers, Software and Data Storage
The computer is often one of the most vulnerable elements in an older inspection system.
Legacy systems may depend on operating systems, interface cards, drivers or software versions that are no longer commercially available. A standard replacement computer may not work because the original configuration contains specialized hardware or licenses.
To reduce risk:
- create full backups of system drives
- document BIOS and hardware settings
- securely archive installation files and drivers
- record software and license information
- consider keeping a compatible replacement computer
- replace aging hard drives before failure
- verify that backups can actually be restored
A documented recovery plan can turn a potentially lengthy production interruption into a manageable repair.
Use Preventive Maintenance to Reduce Downtime
Preventive maintenance is particularly important for older systems. Small mechanical or electrical issues can place additional stress on components that are already difficult to replace.
Regularly inspect:
- fans, filters and cooling systems
- cables and connectors
- bearings, belts and mechanical guides
- pneumatic hoses and seals
- vacuum components
- illumination intensity
- camera image quality
- positioning repeatability
- power-supply output
- storage-device condition
Maintenance records can reveal recurring failures and help determine which spare parts should be prioritized.
Evaluate New, Used and Refurbished Parts Carefully
For discontinued systems, original new components may no longer be available. Used or refurbished parts can therefore provide a practical way to extend equipment lifetime.
The correct choice depends on the application, availability and criticality of the component.
Before purchasing a replacement part, confirm:
- the exact part number and revision
- the stated condition
- compatibility with the existing system
- whether the component has been tested
- what accessories or cables are included
- the return or warranty conditions
- the expected delivery time
Transparent communication about condition and compatibility is essential, particularly for components sourced from the secondary market.
Build a Reliable Sourcing Network
No single supplier will have every legacy component available at all times. Access to a wider sourcing network becomes increasingly important as equipment ages.
A sourcing partner can help search across:
- available internal inventory
- specialized spare-parts suppliers
- equipment dismantlers
- repair providers
- international partner inventories
- refurbished equipment sources
This is especially valuable for obsolete and hard-to-find components that cannot be ordered through standard distribution channels.
Plan for Repairs and Component Harvesting
In some cases, the best solution is not an immediate replacement.
Electronic boards, power supplies, motors and controllers may be repairable. Non-operational equipment can also serve as a valuable source of compatible spare parts.
Depending on the system and component, possible strategies include:
- component-level repair
- board refurbishment
- drive or motor rebuilding
- replacement of aging capacitors or fans
- harvesting parts from donor equipment
- purchasing an identical system for spare-parts support
These options should be evaluated carefully, but they can significantly extend the operational life of legacy platforms.
Know When an Upgrade Becomes Necessary
Extending equipment life is not always the correct long-term decision.
An upgrade or replacement should be considered when:
- inspection performance no longer meets process requirements
- spare-parts availability becomes too limited
- maintenance costs continue to increase
- software or cybersecurity risks become unacceptable
- repeated failures affect production reliability
- the system can no longer be safely maintained
The objective is not to keep every system running indefinitely. It is to make an informed decision based on risk, cost, process requirements and available support.
Supporting the Long-Term Operation of Inspection Equipment
A legacy inspection system can continue to deliver reliable performance when maintenance, documentation and spare-parts planning are handled proactively.
SETECO Market supports customers with semiconductor spare parts, refurbished equipment and sourcing solutions for established inspection and manufacturing platforms. We help identify components, check availability and source obsolete or hard-to-find parts through available inventory and an international supplier network.
Looking for a Spare Part?
Send us the manufacturer, equipment model, part number and any available photographs. Our team will check availability and prepare an individual quotation.