EV Group
850 Wafer
What it is
General reference — not yet source-verifiedWafer bonding systems of this class are process tools that join substrate wafers together under controlled conditions. The EV Group 850 Wafer is one such system, intended for use in packaging and bonding applications where wafers must be permanently or temporarily attached to each other or to carrier substrates.
How it works
General reference — not yet source-verifiedWafer bonders operate by preparing two wafer surfaces and bringing them into intimate contact. Before bonding, the surfaces may receive surface activation treatments such as plasma exposure or chemical cleaning to promote adhesion. The wafers are then aligned to one another and moved together inside an evacuated chamber.
Once in contact, the system applies controlled mechanical pressure and heat to form the bond across the whole wafer area. Some tools use an electrostatic or pneumatic mechanism to press the wafers uniformly. After bonding, the bonded stack is cooled and transferred out of the system for further processing.
Applications
General reference — not yet source-verifiedMachines of this class are generally used for creating bonded wafer stacks for advanced packaging, microelectromechanical systems, and three-dimensional integration. Common applications include cavity sealing for hermetic packages, wafer-to-wafer stacking, and temporary carrier bonding for wafer thinning. The tool also supports processes that require joining dissimilar materials, such as glass or compound semiconductors to silicon wafers.
What do the numbers mean?
Vintage & configurations
Documented models & variants
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
What kinds of bonding processes can this type of machine support?General reference — not yet source-verified
The class supports permanent bonding techniques, including fusion, anodic, and adhesive bonding, as well as temporary bonding for carrier-assisted wafer handling. The exact process range depends on the tool configuration and process kit.
How does the system achieve wafer-to-wafer alignment?General reference — not yet source-verified
Wafer bonding systems typically use optical alignment systems that view alignment marks through the wafers or from both sides. Alignment is performed before final contact, and the chucks then bring the wafers together with the required precision.
What types of substrates are compatible with this class of tool?General reference — not yet source-verified
The tool class is designed for standard round semiconductor wafers commonly made of silicon, glass, or compound semiconductor materials. Compatibility with specific substrate types and thicknesses depends on the installed wafer handling and process modules.
Is this equipment intended for high-volume production or for development work?General reference — not yet source-verified
Wafer bonding systems of this kind are found in both research and production settings. Depending on automation, throughput, and process control features, the same platform class can serve pilot lines, specialty fabs, and mature manufacturing environments.
Not publicly documented
The following facts about the 850 Wafer are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the 850 Wafer are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the 850 Wafer are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the 850 Wafer are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 850 Wafer is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the 850 Wafer are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (4)Every fact above is drawn from these public sources
- [1]Inventory photo
- [2]Inventory photo
- [3]Inventory photo
- [4]Inventory photo
Last updated Oct 13, 2026.
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