PR Hoffman

1500

Research Quality: 40% complete

What is it?

The PR-1 Series Model 85T is described as a 19-inch diameter double-sided planetary lapping and polishing machine. The sources state that it uses an 85-tooth carrier and a standard 1.5 horsepower variable-speed DC motor with controller input of 208/230V, 50/60 Hz, along with stainless steel tub, automatic plate lifter, smooth cast-iron lapping plates, cast-iron planetary drive gears, work table, digital lap cycle timer, fused electrical disconnect panel, and bottom plate adjustment system.

What can it run?

Process applications and technology nodes documented for this tool.

Optical lapping and polishing
Processing materials to thickness, flatness, parallelism, and surface finish tolerances

What do the numbers mean?

Power & electrical1

Controller input: 208/230V, 50/60 Hz^[2]

Wafer handling1

Carrier: 85 tooth carrier^[2]

Control & software1

Motor: 1.5 horsepower variable speed DC motor with controller^[2]

Configuration & options8

Model: 85T^[2]
Type: Double-sided planetary lapping / polishing machine^[2]
Diameter: 19 inch^[2]
Recommended part thickness minimum: 0.010 inch [250 micron]^[2]
Recommended part diameter maximum: 4-1/4 inch [108 mm] or smaller^[2]
Maximum part circle: 6.6 inch [168 mm]^[2]
Stainless steel hood: Standard on all PR-1 models^[1]
Plate lifter: Standard on the 85 tooth model^[1]

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What does it need to run?

Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.

Controller input208/230V, 50/60 Hz^[2]

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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Not publicly documented

The following facts about the 1500 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 1500 are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 1500 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 1500 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 1500 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 1500 is not on record.
Answerable by: an OEM datasheet or a fab qualification report