Lam Research
Rainbow 4520 Plasma RIE
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
What it is
How it works
Applications
General reference — not yet source-verifiedThe Rainbow 4520 plasma RIE system is used for etching dielectric and conductor films in semiconductor device manufacturing. Reactive ion etching is employed for creating vias, contacts, and trench structures.
What do the numbers mean?
Vacuum & pumping2
Wafer handling5
- 2 Load Locks (entrance and exit)[2]
Configuration & options4
- ESC with perimeter pins[2]
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 types of films can be etched with a plasma RIE system?General reference — not yet source-verified
Plasma RIE systems are versatile and can etch dielectric films such as silicon dioxide and silicon nitride, as well as conductor films like polysilicon, aluminum, and tungsten. The specific chemistry is chosen to provide high selectivity to the underlying or masking layers.
How does the machine control etch profile and uniformity?General reference — not yet source-verified
Profile control is achieved by adjusting process parameters including gas composition, pressure, RF power, electrode temperature, and wafer chuck cooling. Uniformity is managed through chamber design, gas distribution, and often by using a multi-zone electrode or baffle system to ensure consistent plasma density across the entire wafer.
What maintenance is required to keep such a system running?General reference — not yet source-verified
Routine maintenance includes cleaning the chamber walls to remove process residue, replacing consumable parts such as focus rings and shield kits, and calibrating pressure gauges and mass flow controllers. Regular preventive maintenance helps maintain etch repeatability and minimize particle contamination.
Is this class of etcher suitable for advanced technology nodes?General reference — not yet source-verified
While older models may be used for mature or legacy nodes, the parallel-plate RIE architecture itself can be scaled to support sub-micron features. However, for the most advanced nodes, newer etcher designs with enhanced ion control (e.g., capacitively coupled plasma with multiple frequencies) are often preferred. The class remains widely used for many non-critical layers.
Not publicly documented
The following facts about the Rainbow 4520 Plasma RIE 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 Plasma RIE 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 Plasma RIE 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 Plasma RIE 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 Plasma RIE are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the Rainbow 4520 Plasma RIE 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 listing
- [3]Equipment inventory listing
Last updated Sep 30, 2026.
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