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ASTM F71-68(1999)

(Practice)

Standard Practice for Using the Morphological Key for the Rapid Identification of Fibers for Contamination Control in Electron Devices and Microelectronics (Withdrawn 2005)

Standard Practice for Using the Morphological Key for the Rapid Identification of Fibers for Contamination Control in Electron Devices and Microelectronics (Withdrawn 2005)

SCOPE
1.1 This practice covers the rapid identification of nonmetallic, fibrous contaminants by the microscopical examination of their morphology. The procedure is intended either to provide tentative identification or to serve as a supporting test in confirming the identity of suspected fibrous contaminants.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
WITHDRAWN RATIONALE
This practice covers the rapid identification of nonmetallic, fibrous contaminants by the microscopical examination of their morphology. The procedure is intended either to provide tentative identification or to serve as a supporting test in confirming the identity of suspected fibrous contaminants.
Formerly under the jurisdiction of Committee E21 on Space Simulation and Applications of Space Technology, this practice was withdrawn in April 2005. This practice was withdrawn and replaced by Test Methods D 276.

General Information

Status
Withdrawn
Publication Date
09-Aug-1999
Withdrawal Date
11-Apr-2005
ICS
31.020 - Electronic components in general
Technical Committee
E21 - Space Simulation and Applications of Space Technology
Drafting Committee
E21.05 - Contamination
Current Stage
Ref Project

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ASTM F71-68(1999) - Standard Practice for Using the Morphological Key for the Rapid Identification of Fibers for Contamination Control in Electron Devices and Microelectronics (Withdrawn 2005)ASTM F71-68(1999) - Standard Practice for Using the Morphological Key for the Rapid Identification of Fibers for Contamination Control in Electron Devices and Microelectronics (Withdrawn 2005)
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ASTM F71-68(1999) - Standard Practice for Using the Morphological Key for the Rapid Identification of Fibers for Contamination Control in Electron Devices and Microelectronics (Withdrawn 2005)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F 71 – 68 (Reapproved 1999)
Standard Practice for
Using the Morphological Key for the Rapid Identification of
Fibers for Contamination Control in Electron Devices and
Microelectronics
ThisstandardisissuedunderthefixeddesignationF 71;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.4 septs—walls separating cavities in the fiber. See Fig. 1
(d).
1.1 This practice covers the rapid identification of nonme-
3.1.5 scales—surface plate-like formations. See Fig. 1 (a)
tallic, fibrous contaminants by the microscopical examination
and (h).
of their morphology. The procedure is intended either to
provide tentative identification or to serve as a supporting test
4. Summary of Practice
in confirming the identity of suspected fibrous contaminants.
4.1 This practice comprises the collection and mounting of
1.2 This standard does not purport to address all of the
fibers and their examination by transmitted light. The fiber
safety concerns, if any, associated with its use. It is the
morphology is observed for its dimensions and external and
responsibility of the user of this standard to establish appro-
internal structure and is compared to a morphological key
priate safety and health practices and determine the applica-
analysis chart for classification.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Microscope, approximately 100 and 4003 magnifica-
2.1 ASTM Standards:
tion, with mechanical stage, substage illumination, and con-
D 276 Method for Identification of Fibers in Textiles
denser to provide transmitted light. The optimum equipment is
F 25 Test Method for Sizing and Counting Airborne Par-
a binocular microscope with mechanical stage, substage illu-
ticulate Contamination in Clean Rooms and Other Dust-
mination, and substage condenser having 103 eyepieces and
Controlled Areas Designed for Electronic and Similar
3 appropriate objectives to provide approximately 00 and 4003
Applications
magnification.
3. Terminology 5.2 Microscope Lamp, required only when substage light
source not provided with microscope.
3.1 Definitions:
5.3 Ocular Micrometer Scale.
3.1.1 fiber—a particle longer than 100 µm with a length-to-
5.4 Stage Micrometer, standard 0.01- to 01-mm scale.
diameter ratio of greater than 10:1. For this practice, the
5.5 Glass Microscope Slides.
definition includes organic and inorganic fibers, both natural
5.6 Immersion Oil, refractive index 1.51.
and synthetic, but excludes metal fibers. See Fig. 1 (r).
5.7 Microscope Slide Cover Glasses.
3.1.2 medulla—a distinct center portion of a fiber. See Fig.
1(c).
6. Sampling
3.1.3 lumen—a canal or central opening in the fiber. See
6.1 Sample airborne fibers in accordance with Test Method
Fig. 1(b).
F 25.
6.2 Sample fibers on surfaces, by removing the fiber from
This practice is under the jurisdiction of ASTM Committee E-21 on Space the surface and placing it on a glass microscope slide, using
Simulation andApplications of Space Technology and is the direct responsibility of
appropriate forceps.
Subcommittee E21.05 on Contamination.
Current edition approved Aug. 15, 1968. Published October 1968. Originally
published as F 71 – 66 T. Last previous edition F 71–66 T.
For more detailed procedures of fiber identification, see Test Methods D 276,
which appears in the Annual Book of ASTM Standards,Vol 07.01, also M.
...

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1.3 The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pound units. The standardized CFR engine measurements continue to be in inch-pound units only because of the extensive and expensive tooling that has been created for this equipment.  
1.4 For purposes of determining conformance with all specified limits in this standard, an observed value or a calculated value shall be rounded “to the nearest unit” in the last right-hand digit used in expressing the specified limit, in accordance with the rounding method of Practice E29.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Section 8, 14.4.1, 15.5.1, 16.6.1, Annex A1, A2.2.3.1, A2.2.3.3 (6) and (9), A2.3.5, X3.3.7, X4.2.3.1, X4.3.4.1, X4.3.9.3, X4.3.11.4, and X4.5.1.8.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Gu...

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  • Standard
    48 pages
    English language
    sale 15% off