Lam Research
Rainbow 4520 i Oxide
What it is
How it works
General reference — not yet source-verifiedAn oxide etcher removes silicon dioxide or related oxide films from patterned wafers by using a controlled plasma-based etch process.
A mask aligner and photolithography tool are not part of this equipment class.
Where it fits in the process flow
General reference — not yet source-verifiedAn oxide etcher sits in the pattern transfer portion of wafer fabrication, where exposed dielectric material is removed after a masking step.
An oxide etch step commonly follows lithographic pattern definition and precedes later cleaning, inspection, or additional process steps.
Applications
What do the numbers mean?
Power & electrical5
Vacuum & pumping1
Wafer handling1
Configuration & options4
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 type of plasma source do oxide etchers typically use?General reference — not yet source-verified
Oxide etchers commonly use inductively coupled plasma (ICP) or capacitively coupled plasma (CCP) sources, often with dual-frequency RF biasing to decouple plasma density from ion energy.
How do oxide etchers achieve high selectivity to the underlying layer?General reference — not yet source-verified
Selectivity is managed through careful choice of gas chemistry (e.g., fluorocarbon gases) and adjustment of ion energy. Polymer-forming chemistries can be used to passivate non-oxide surfaces, protecting them from etching.
Can oxide etchers be used for other dielectric materials?General reference — not yet source-verified
Yes, with appropriate gas chemistry changes, these systems can also etch silicon nitride, silicon oxynitride, and low-k dielectrics, though the process parameters and selectivity targets will differ.
Not publicly documented
The following facts about the Rainbow 4520 i Oxide 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 Rainbow 4520 i Oxide are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the Rainbow 4520 i Oxide are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the Rainbow 4520 i Oxide 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 Rainbow 4520 i Oxide are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the Rainbow 4520 i Oxide is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (3)Every fact above is drawn from these public sources
- [1]Inventory photo
- [2]Inventory photo
- [3]Inventory photo
Last updated Oct 3, 2026.
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