IPC-TM-650 EN 2022 试验方法--.pdf - 第5页
PROCEDURE The procedure section is to be used to detail the specific s teps necessary to perform the actual test. It will include any specific conditioning requirements, o r other sp ecime n preparation not previously deta…
An IPC test method is a concise way of providing a procedure by which the properties or constituents of a material,
an assembly of materials, or a product can be examined. It is not intended that these test procedures contain accept-
ability levels for performance. Specific acceptability criteria should be detailed in the individual performance specifi-
cation.
An IPC test method is intended to provide a uniform system of testing that can be utilized by a variety of IPC, com-
mercial, and military performance specifications. It should therefore represent a consensus as to the best available test
procedure for the intended use. It should be supported by experience and adequate data obtained from cooperative
tests. It should be precise enough so that when a procedure is performed by an operator, the results will be found sat-
isfactory for judging the compliance of material with the specification.
The IPC test methods are typically generated or revised by a performance specification group, which needs a tool to
measure product performance. Since this generated or revised method will certainly affect other performance specifi-
cations, special care must be taken to ensure that all affected performance specification groups are involved at some
stage of the method’s writing or revision.
The IPC has empowered the Test Methods Subcommittee with the task of assuring that comprehensive, well detailed
test procedures are produced. This subcommittee has developed a format for test method generation, which must be
strictly followed. On the following pages is the format for developing a test method, as well as a flow chart detailing
how test method generation should take place.
SCOPE
The Scope section defines the purpose and gives an overall view of the test method. This section should be
written in summary fashion and include any limitations that might cause erroneous test results. It should also include
a general statement regarding any cautions, hazards, or warnings about the test method, referencing Section 6.0
NOTES for detailed information.
APPLICABLE DOCUMENTS
The Applicable Documents section should include a list of all applicable documents, and
may show where to obtain these documents. Applicable documents are defined as documents that are specifically
called out within the test method, and do not include other reference documents. Reference documents may be
included in Section 6.0 NOTES of the test method.
TEST SPECIMENS
The Test Specimens section should include the type, size, and quantity of specimens required to
conduct the test. Preparation of the specimens should be detailed in this section. If preparation is covered by another
IPC-TM-650 test method (i.e., microsectional preparation), that method should be referenced here. Necessary consid-
erations for storage, preservation, and handling of test specimens must also be made in this section.
APPARATUS OR MATERIAL
This section should include all apparatus or materials utilized in the test method. It
should include the technical data, accuracy requirements, and range capabilities of the equipment or materials neces-
sary to adequately complete the test. This section should also include reference drawings for any specialized equip-
ment or test fixtures required. If chemical reagents, purified water, or other specialized materials are to be used, purity,
concentration, and/or special formulas required must be detailed. Specific brand names or trademarks should be
avoided unless they are required for a well defined reason. In this case, utilize a footnote giving the required informa-
tion along with either of the following phrases: ‘‘has been found satisfactory for this purpose;’’ ‘‘or equivalent.’’
Formality
Procedure
of
an
IPC-TM-650
Test
Method
SECTION
1.0
SECTION
2.0
SECTION
3.0
SECTION
4.0
PROCEDURE
The procedure section is to be used to detail the specific steps necessary to perform the actual test. It
will include any specific conditioning requirements, or other specimen preparation not previously detailed. It will then
detail the successive steps of the procedure, grouping related operations into logical divisions in a concise manner. It
will include times, temperatures, voltages, pressures, concentrations, linear measurements, and quantitative criteria
when necessary in metric units.
It will then describe how to evaluate the samples under test, providing examples when necessary. It will also include
any calculations or conversion tables necessary to complete or evaluate the test. The calculations should use numeri-
cal values for any physical constants and letter symbols to describe variables. The letter symbols must then be imme-
diately identified under the equation.
It will also state any detailed information required in reporting the test results. When two or more procedures are
described in the test method, the report will indicate which of the procedures was used. When a test method allows
variations in operating or other conditions, the report will state the particular conditions utilized for the test.
NOTES
The notes section is to be used to discuss any special considerations, or detail other reference documents
necessary or recommended for the test. This section should include any safety precautions, hazard information, or
warning statements necessary for the safe completion of the test method. This section should also be used to show
sources of obtaining specialized test apparatus or materials for the test.
SECTION
5.
0
SECTION
6.
0
The IPC Test Methods Manual, IPC-TM-650, is divided into several major sections to provide a systematic means of
displaying a variety of information pertinent to testing all types of printed circuits and connectors. The following is a
general description of the information contained in each major section of the IPC-TM-600. A more detailed listing of
the contents of each major section appears as the Table of Contents at the beginning of each major section.
Section One contains a listing of the Test Methods Subcommittee members, an explanation of the use of this volume,
information of general interest relative to calibration of test equipment, reporting formats and practices, organizational
abbreviations and sources, compliance certification, and review board procedures.
Section Two contains the specific test methods, together with appropriate illustrations, sketches, and tables necessary
for the performance of chemical, mechanical, electrical, and environmental tests on all forms of printed circuits. It is
divided into subsections so that each test method can be found easily under the broad titles mentioned above. These
test methods are also intended for use by adapting them for testing materials or end products similar to those for which
these test methods were specifically written.
Section Three contains the specific test methods, together with appropriate illustrations, sketches, and tables necessary
for the performance of chemical, mechanical, electrical, and environmental tests on connectors used in printed cir-
cuitry. These test methods are abstracted from the EIA-IPC agreed upon test methods appearing in the EIA-RS-364
Standard.
Section Four contains information on diagnostic techniques for failure analyses. These are not standard test methods
because the methods and procedures vary, depending on the condition or behavior of the test specimen. This section
is intended to provide a feel for the capabilities of diagnostic testing for the relatively sophisticated equipment and
training required, as well as the cost of diagnostic analyses. Most of these analytical test techniques are not feasible
for routine incoming inspection, in-process inspection, or end-product evaluation.
Section Five contains related information to supplement and support the previous sections. It provides a listing of
related test methods that may be utilized even though not yet officially concurred with by the IPC, a listing of related
publications, a subsection dedicated to the metric system, information on preparing samples for testing, and specifi-
cations and sketches of test pattern artwork for all forms of printed circuitry.
I
PC
Test
Methods
Manual
SECTION
ONE
—
INTRODUCTION
SECTION
TWO
—
TEST
METHODS
FOR
PRINTED
WIRING
BOARDS
SECTION
THREE
—
TEST
METHODS
FOR
CONNECTORS
SECTION
FOUR
—
PHYSICS
OF
FAILURE
DIAGNOSTIC
METHODS
SECTION
FIVE
—
REFERENCE
INFORMATION