MIL- STD-883F 2004 TEST METHOD STANDARD MICROCIRCUITS - 第289页
MIL-STD-883F METHOD 2016 15 November 1974 1 METHOD 2016 PHYSICAL DIMENSIONS 1. PURPOSE . The purpos e of thi s examination i s to ver ify t hat the external physic al dimens ions of the devic e are in accor dance wit h t…
MIL-STD-883F
METHOD 2015.13
18 December 2000
2
2.2 Vessel
. The vessel shall be a container made of inert material, and of sufficient size to permit complete immersion of
the specimens in the solvent solutions specified in 2.1.
2.3 Brush
. The brush shall be a toothbrush with a handle made of a nonreactive material. The brush shall have three
long rows of hard bristles, the free ends of which shall lie substantially in the same plane. The toothbrush shall be used
exclusively with a single solvent and when there is any evidence of softening, bending, wear, or loss of bristles, it shall be
discarded.
3. PROCEDURE
. The specimens subjected to this test shall be divided into three equal groups. Each group shall be
individually subjected to one of the following procedures:
Note: Metal lidded leadless chip carrier (LCC) packages shall be preconditioned by immersing the specimens in room
temperature flux type symbols “A” or “B” (flux types “LO” or “L1”) in accordance with ANSI/J-STD-004 previously
designated as RMA flux in accordance with MIL-F-14256, for 5 to 10 seconds. The specimens shall then be subjected
to an ambient temperature of 215 °C ±5°C for 60 seconds +5, -0 seconds. After the preconditioning, each device lid
shall be cleaned with isopropyl alcohol.
a. The first group shall be subjected to the solvent solution as specified in 2.1a maintained at a temperature of 25°C
±5°C.
b. The second group shall be subjected to the solvent solution as specified in 2.1b maintained at a suitable
temperature.
c. This solution has been deleted, (see 2.1c).
d. The fourth group shall be subjected to the solvent solution as specified in 2.1d maintained at a temperature of 63°C
to 70°C.
The specimens and the bristle portion of the brush shall be completely immersed for 1 minute minimum in the specified
solution contained in the vessel specified in 2.2. Immediately following emersion, the specimen shall be brushed with
normal hand pressure (approximately 2 to 3 ounces) for 10 strokes on the portion of the specimen where marking has been
applied, with the brush specified in 2.3. Immediately after brushing, the above procedure shall be repeated two additional
times, for a total of three immersions followed by brushings. The brush stroke shall be directed in a forward direction,
across the surface of the specimen being tested. After completion of the third immersion and brushing, devices shall be
rinsed and all surfaces air blown dry. After 5 minutes, the specimens shall be examined to determine the extent, if any, of
deterioration that was incurred.
3.1 Optional procedure for the fourth group
. The test specimens shall be located on a test surface of known area which
is located 15 ±2.5 centimeters (6 ±1 inches) below a spray nozzle(s) which discharges 0.6 ±0.02 liters/minute (0.139 gpm) of
solution (2.1d) per 6.5 square centimeters (1 in
2
)surface area at a pressure of 140 ±30 kilopascal (20 ±5 psi). The
specimens shall be subjected to this spray for a period of 10 minutes minimum. After removal and within 5 minutes the
specimens shall be examined in accordance with 3.1.1. The specimens may be rinsed with clear water and air blow dried
prior to examination.
3.1.1 Failure criteria
. After subjection to the test, evidence of damage to the device and any specified markings which are
missing in whole or in part, faded, smeared, blurred, or shifted (dislodged) to the extent that they cannot be readily identified
from a distance of at least 15.0 cm (6 inches) with normal room lighting and without the aid of magnification or with a viewer
having a magnification no greater than 3X shall constitute a failure.
4. SUMMARY
. The following detail shall be specified in the individual specification: The number of specimens to be
tested (see 3).
MIL-STD-883F
METHOD 2016
15 November 1974
1
METHOD 2016
PHYSICAL DIMENSIONS
1. PURPOSE
. The purpose of this examination is to verify that the external physical dimensions of the device are in
accordance with the applicable acquisition document.
2. APPARATUS
. Equipment used in this examination shall include micrometers, calipers, gauges, contour projectors, or
other measuring equipment capable of determining the actual device dimensions specified in the applicable acquisition
document.
3. PROCEDURE
. Unless otherwise specified, the physical dimensions on the case outline drawing shall be measured.
3.1 Failure criteria
. Any device which exhibits a dimension or dimensions outside the specified tolerances or limits shall
constitute a failure.
4. SUMMARY
. The following detail shall be specified in the applicable acquisition document:
External dimensions which are capable of physically describing the device (see 3). Dimensions to be considered shall
include case outline dimensions; special lead shapes (e.g., required bend positions, angles of bend), where applicable;
dimensions of any projecting or indented features used for coding of lead arrangement, automatic handling and similar
purpose; and any other information which affects the installed size or orientation of the device in normal applications.
MIL-STD-883F
METHOD 2016
15 November 1974
2
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