Waferpedia

Tegal

903ACS

The Tegal 903ACS is a diode reactive ion etching system. The Tegal 903ACS is a narrow gap diode reactor system. The Tegal 903ACS can etch features down to 1 micron.[1]

Tegal903ACS
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Wafer size

75 mm, 100 mm, 125 mm, and 150 mm diameter wafers; 4-inch square wafers

Node / era

1 micron

What it is

The Tegal 903ACS is a reactive ion etch system for semiconductor processing.[1]

The Tegal 903ACS is part of a diode RIE family that handles cassette-to-cassette wafer processing.[1]

How it works

The Tegal 903ACS is a narrow-gap diode reactor system.[1]

The Tegal 903ACS is intended for tightly controlled anisotropic etching of insulating layers.[1]

Where it fits in the process flow

The Tegal 903ACS handles wafer movement cassette to cassette, which avoids manual wafer handling in the etch stage.[1]

Applications

The Tegal 903ACS is suited for semiconductor processing of silicon, gallium arsenide, indium phosphide, and silicon germanium substrates.[1]

The Tegal 903ACS can plasma etch silicon dioxide, silicon nitride, and silicon carbide.[1]

  • Non-critical etching of dielectrics
  • Photoresist trimming
  • Semiconductor processing of silicon
  • Tightly controlled, anisotropic etching of silicon dioxide and silicon nitride insulating layers

What do the numbers mean?

Wafer handling2

Substrates
Silicon, gallium-arsenide (Ga-As), indium-phosphide (In-P), and silicon-germanium (Si-Ge)[1]
Accurate?
Wafer sizes
75 mm, 100 mm, 125 mm, and 150 mm diameter wafers; 4-inch square wafers[1]
Accurate?

Configuration & options5

Process type
Reactive ion etching (RIE)[1]
Accurate?
Reactor type
Narrow gap diode reactor system[1]
Accurate?
Materials etched
Silicon dioxide, silicon nitride, and silicon carbide[1]
Accurate?
Minimum feature size
1 micron[1]
Accurate?
Etch applications
Tightly controlled, anisotropic etching of silicon dioxide and silicon nitride insulating layers[1]
Accurate?

Vintage & configurations

Documented models & variants

DesignationGenerationVintageChangesSource
Tegal 901ACS——Wide-gap diode reactor system suited for low-temperature plasma etch operations and delicate materials; no clamps or electrostatic mechanisms for wafer manipulation.plasmatherm.com[1]
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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

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Frequently asked questions

Which substrates can the Tegal 903ACS process?

The Tegal 903ACS is suited for silicon, gallium arsenide, indium phosphide, and silicon germanium substrates.[1]

Which materials can the Tegal 903ACS etch?

The Tegal 903ACS can plasma etch silicon dioxide, silicon nitride, and silicon carbide.[1]

What kind of diode reactor is the Tegal 903ACS?

The Tegal 903ACS is a narrow-gap diode reactor system.[1]

What etch style is the Tegal 903ACS intended for?

The Tegal 903ACS is intended for tightly controlled, anisotropic etching of silicon dioxide and silicon nitride insulating layers.[1]

How does the Tegal 903ACS handle wafers?

The Tegal 903ACS handles wafers cassette to cassette.[1]

Not publicly documented

The following facts about the 903ACS 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 903ACS are on record.

    Answerable by: OEM historical records or a trade-press announcement

  • The control-system platform and OS era of the 903ACS 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 903ACS are on record.

    Answerable by: a field service engineer, process engineer, or maintenance technician

  • No publicly documented compatible parts, consumables, or accessories for the 903ACS are on record.

    Answerable by: an OEM parts catalog or a service engineer

  • No publicly hosted manuals, SOPs, or datasheets for the 903ACS are on record.

    Answerable by: university cleanroom staff or an OEM application specialist

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Sources & citations

Sources (1)Every fact above is drawn from these public sources
  1. [1]plasmatherm.com — plasmatherm.complasmatherm.com
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Last updated Oct 3, 2026.

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