PR Hoffman

121T

insert carrier / lapping carrier 76mm PR Hoffman 121T family

Research Quality: 30% complete

PR Hoffman121T

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What is it?

The sources list PR Hoffman 121T as a carrier type used with double-sided planetary lapping and polishing machines. It appears as a 121T Sprocket / AC-2000 - Peter Wolters entry in the insert carrier and lapping carrier type lists, and the sources also state that PR Hoffman insert carriers up to 33 inches diameter can be manufactured for 3 inch through 12 inch wafers.

What can it run?

Process applications and technology nodes documented for this tool.

Double-sided planetary lapping
Double-sided planetary polishing

What do the numbers mean?

Wafer handling2

Carrier diameter: Up to 33 inches diameter^[1]
Carrier diameter: Up to 48 inches diameter^[2]

Configuration & options3

Model / type entry: 121T- Sprocket AC-2000 - Peter Wolters^[1]
Machine application: For double-sided planetary lapping & polishing machines^[1]
Machine application: For double-sided planetary lapping machines^[2]

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Where are the manuals?

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Not publicly documented

Field notes

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Not publicly documented

The following facts about the 121T 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 121T are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 121T 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 121T 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 121T are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 121T is not on record.
Answerable by: an OEM datasheet or a fab qualification report