PR Hoffman
A carrier of this class is a workholding plate used in double-sided planetary lapping or polishing. A carrier of this class holds parts in cutouts while the parts move between opposing laps or polishing plates. A carrier of this class helps maintain part spacing, supports parallel processing, and controls how the workpieces are presented to the abrasive surfaces.
A carrier of this class sits inside the material-removal stage of double-sided lapping or polishing. A carrier of this class is used after parts have been sliced, molded, pressed, or otherwise prepared as blanks and before final cleaning, inspection, or later finishing operations. A carrier of this class supports simultaneous processing of many parts when both major faces need flatness and parallelism control.
Carriers of this class are used where a process needs both faces of a part finished together. Carriers of this class are common for wafers, substrates, ceramics, glass, metals, and other flat workpieces that must be thinned, flattened, or polished with controlled face-to-face geometry.
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The following facts about the 106T 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 106T are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 106T 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 106T 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 106T are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 106T is not on record.
Answerable by: an OEM datasheet or a fab qualification report
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Last updated Oct 17, 2026.
PR Hoffman 121T is an insert carrier and lapping carrier type used with double-sided planetary lapping and polishing machines.