Hitachi
DM 421 P
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
General reference — not yet source-verifiedAn etcher removes material from a wafer surface using plasma or chemical processes to define device patterns.
Where it fits in the process flow
General reference — not yet source-verifiedEtching is performed after photolithography to transfer the photoresist pattern into the underlying layer.
The etched wafer then moves to downstream steps such as resist stripping, cleaning, and deposition.
Applications
General reference — not yet source-verifiedThe etcher is used for dielectric or metal etching in the fabrication of integrated circuits.
What do the numbers mean?
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.
Not publicly documented
The following facts about the DM 421 P are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
Fewer than 3 independently cited specifications for the DM 421 P are on record; the remainder await public documentation.
Answerable by: an OEM datasheet, a cleanroom equipment inventory, or an engineer who operated or installed it
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the DM 421 P are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the DM 421 P 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 DM 421 P 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 DM 421 P are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (1)Every fact above is drawn from these public sources
- [1]Equipment inventory listing
Last updated Oct 2, 2026.
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