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Signatone

SP4

Test & ProbeSignatone SP4 family
Research Quality: 40% complete
SP4 — web.archive.org
Fig. 01SP4web.archive.org[1]

What is it?

The SP4 is a Signatone four point probe head made from mold-injected Delrin and designed for use at room temperatures. The source states that it is available with different probe tip spacings, spring pressures, materials, and optional blunt tip radii, and describes the tips as arranged in a straight line configuration.

What can it run?

Process applications and technology nodes documented for this tool.

  • Resistivity measurement
  • Resistivity probing applications
  • Silicon wafer probing applications

What do the numbers mean?

Vacuum & pumping1

Spring pressure options
45 grams, 85 grams, or 180 grams per tip[1]
Accurate?

Configuration & options7

Material
Mold-injected Delrin[1]
Accurate?
Operating temperature
Room temperatures[1]
Accurate?
Tip configuration
Four tips in a straight line configuration[1]
Accurate?
Spacing options
40 mils, 50 mils, or 62.5 mils between probe tips[1]
Accurate?
Tip material options
Osmium or tungsten carbide[1]
Accurate?
Standard probe tip size
1.6 mil diameter[1]
Accurate?
Optional blunt tip radii
R=.005 for 5 mil diameter tips; R=.010 for 10 mil diameter tips[1]
Accurate?
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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.

  • Spring pressure options45 grams, 85 grams, or 180 grams per tip[1]

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 SP4 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 SP4 are on record.

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

  • No publicly documented variants, configuration options, or revision breakpoints of the SP4 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 SP4 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 SP4 are on record.

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

  • The process node or technology generation of the SP4 is not on record.

    Answerable by: an OEM datasheet or a fab qualification report

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. [1]web.archive.orgweb.archive.orgweb.archive.org
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Last updated Jul 29, 2026.

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