ASTM F18-64(2006)

Standard Specification and Test Method for Evaluation of Glass-to-Metal Headers Used in Electron Devices

SCOPE
1.1 This specification and test method cover acceptance requirements for headers used in electron devices and describes procedures for determining conformance to these requirements.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following safety hazard caveat pertains only to the test method (Sections 6-12) described in this specification. 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2005
• ICS: 31.240 - Mechanical structures for electronic equipment
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F18-64(2000) - Standard Specification and Test Method for Evaluation of Glass-to-Metal Headers Used in Electron Devices
• Effective Date: 01-Jan-2006
• Replaced By: ASTM F18-12 - Standard Specification and Test Method for Evaluation of Glass-to-Metal Headers Used in Electron Devices
• Effective Date: 01-Feb-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F18 – 64 (Reapproved 2006)
Standard Specification and Test Method for
Evaluation of Glass-to-Metal Headers Used in Electron
Devices
ThisstandardisissuedunderthefixeddesignationF18;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope enclosed by glass are permissible up to a diameter not
exceeding that of the smallest lead.
1.1 This specification and test method cover acceptance
3.1.1.3 Metallic parts shall be as free of draw lines or
requirementsforheadersusedinelectrondevicesanddescribes
grooves longer (by visual estimate) than one half of the seal
procedures for determining conformance to these require-
length as best commercial practice will permit.
ments.
3.1.1.4 In the case of clear glass seals, reference is made to
1.2 The values stated in inch-pound units are to be regarded
the seal area only.
as the standard. The values given in parentheses are for
3.1.1.5 In the case of opaque glass seals, reference is made
information only.
to any portion of the exposed metal parts.
1.3 The following safety hazard caveat pertains only to the
3.1.2 Leak:
testmethod(Sections6-12)describedinthisspecification. This
3.1.2.1 Withtheheadersealedtothemassspectrometerleak
standard does not purport to address all of the safety concerns,
detector,thenumberofdetectableleaksinasamplelotshallbe
if any, associated with its use. It is the responsibility of the user
less than the limit agreed upon between the purchaser and the
of this standard to establish appropriate safety and health
seller.
practices and determine the applicability of regulatory limita-
tions prior to use.
TEST METHODS
2. Terminology
4. Apparatus
2.1 Definitions of Terms Specific to This Standard:
4.1 Microscope, of 10 power magnification, unless other-
2.1.1 The header may be described as an external metal
wise specified, in combination with suitable incandescent
memberofcylindrical,oval,orothershapeintowhichissealed
white light source.
one or more wire leads or metal tubulations through a glass
4.2 Mass Spectrometer Leak Detector, adjusted to respond
medium. The metal parts may be plated or unplated and the
toatracergassuchasheliumandcapableofdetectingleaksof
glass may be clear or opaque.
−9
10 mL/s at standard temperature and pressure.
4.3 Hood, having a volume of approximately 250 cm ,to
3. Acceptance Requirements
cover the test specimen completely with the tracer gas. (The
3.1 The headers shall conform to the requirements as
hood should be flushed with the tracer gas for at least 10 s).
specified in 3.1.1 and 3.1.2 when tested in accordance with the
4.4 Fixture, suitable for making a seal between the header
prescribed methods of test (Sections 4-12).
under test and the lead detector. A suggested jig is shown in
3.1.1 Visual:
Fig. 1.
3.1.1.1 Cracksaroundtheleadshallberestrictedaxiallyand
4.5 Bath, two constant temperature water baths, and an
radially to one lead diameter. Specimens showing any other
immersion bath maintained at a temperature of − 80°C
type of crack shall be rejected.
to−70°C.
3.1.1.2 The glass shall be free of inclusions exceeding one
4.6 Torque Fixture, capable of holding the header in a fixed
half of the smallest lead diameter. Gas bubbles entirely
position and capable of rotating a lead about its axis.
4.7 Bending Fixture, capable of rotating the header through
anarcof90,+0−5°, about an axis of the lead under test and
This specification and test method are under the jurisdiction of ASTM
Committee F1 on Electronics and are the direct responsibility of Subcommittee
through the exit point of the lead from the glass. A weight is
F01.03 on Metallic Materials.
attached to the lead at a point close to the extremity.
Current edition approved Jan. 1, 2006. Published January 2006. Originally
4.8 Megohmmeter, for testing electric insulation.
approved in 1961 as F18 – 61T. Last previous edition approved in 2000 as F18 –
64 (2000). DOI: 10.1520/F0018-64R06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F18 – 64 (2006)
FIG. 1 Fixture for Making a Seal Between the Header Under Test and the Leak Detector
4.9 Furnace, capable of heating parts to a temperature of from the glass. With the header fixed, rotate the lead through
450°C maximum. 1080 6 30° (3 complete revolutions) about its own axis at a
4.10 Lead Pull Tester, capable of holding the header in a uniformrateof10to20r/min.Aftercompletionofthetest,the
fixed position while applying a load along the axis of the lead header shall conform to the requirements specified in 3.1.
in a direction perpendicular to the plane containing the rim of
7.2 Leads or Terminals Greater than 0.021 in. (0.53 mm) in
the header. The displacement of one constraining member of
Diameter—To the outer portion of the terminal at a point
the tester shall increase at a constant rate with respect to the
between 2 and 4 terminal diameters away from the glass,
second constraining member of the tester.
slowly apply a torque of at least 0.445 kgf·cm/(mm of lead
diameter) or 250 l
...