IPC-TM-650 EN 2022 试验方法-- - 第71页
Degree 3 Degree 4 Degree 4 Degree 2 Degree 4 Degree 5 IPC-TM-650 Page 3 of 3 Number 2.1.10 Subject Visual Inspection for Undissolved Dicyandiamide Date 12/94 Revision A DEGREES OF DICYANDIAMIDE (DICY) CRYSTALS
Degree 1
Degree 2
Degree 1
Degree 2
IPC-TM-650
Page 2 of 3
Number
2.1.10
Subject
Visual
Inspection
for
Undissolved
Dicyandiamide
Date
12/94
Revision
A
Appendix
A:
[Photos
of
dicy
in
lowest,
medium,
high,
and
extreme
levels.]
Degree 3
Degree 4
Degree 4
Degree 2
Degree 4
Degree 5
IPC-TM-650
Page 3 of 3
Number
2.1.10
Subject
Visual
Inspection
for
Undissolved
Dicyandiamide
Date
12/94
Revision
A
DEGREES
OF
DICYANDIAMIDE
(DICY)
CRYSTALS
1 Scope
This method describes a procedure for quantifying
the presence of voids in flexible printed board materials.
1.1 Inclusions
This test method no longer addresses inclu-
sions which are inspected using ASTM D-149.
2 Applicable Documents and Terms and Definitions
2.1 Applicable Documents
2.1.1 IPC
1
Flexible Base Dielectrics for Use in Flexible Printed
Circuitry
Cover and Bonding Material for Flexible Printed
Circuitry
Flexible Metal-Clad Dielectrics for Use in Fabrica-
tion of Flexible Printed Circuitry
2.1.2 American Society for Testing and Materials
(ASTM)
2
Standard Test Method for Dielectric Break-
down Voltage and Dielectric Strength of Solid Electrical Insu-
lating Materials at Commercial Power Frequencies
2.2 Terms and Definitions
2.2.1 Void (Bubble/Hole)
The absence of any substances
in a localized area.
3 Specimens
Each specimen: 30 cm x 30 cm [approx. 12
in x 12 in].
4 Test Equipment
4.1
A shear, paper cutter or similar cutting tool for cutting
30 cm X 30 cm [12 in X 12 in] samples.
4.2
Microscope or optical inspection device capable of up to
30X magnification.
4.3
Etching system capable of removal of metal cladding.
4.4
Chemical etchant capable of metal removal without det-
rimental effect to either the adhesive or dielectric.
4.5
Suitable light table for inspecting 30 cm x 30 cm
[approx. 12 in x 12 in] samples.
5 Procedure
5.1 Test Specimen Preparation
Three test specimens
30 cm x 30 cm [approx. 12 in x 12 in] in size are to be pre-
pared for examination/inspection. If the specimens are metal
clad, the metal foil is to be 100% removed by chemical etch-
ing, followed by rinsing and drying. If the specimens are
adhesive-coated on one or both sides, the protective cover
sheet(s) is/are to be completely removed.
5.2 Test Specimen Examination
Using the light table and
30X magnification microscope or optical inspection device,
inspect 100% of each of the three 30 cm x 30 cm [approx.
12 in x 12 in] test specimens for voids. Measure and record
the number of voids found, along with the longest dimension
of each void to the nearest 0.013 mm [500 µin], which is con-
sidered to be the size of the void.
Record the size in mm [in], quantity, and type of void found
(bubble, hole, etc.). The requirements for number and size of
the voids are defined in the appropriate materials specifica-
tions: IPC-4202, IPC-4203 or IPC-4204.
1. www.ipc.org
2. www.astm.org
3000 Lakeside Drive, Suite 309S
Bannockburn, IL 60015-1249
IPC-TM-650
TEST METHODS MANUAL
Number
2.1.13
Subject
Inspection for Voids in Flexible Printed Board
Materials
Date
05/12
Revision
B
Originating Task Group
Flexible Circuits Test Methods Subcommittee
(D-15)
Association
Connecting
Electronics
Industries
IPC-4202
IPC-4203
IPC-4204
ASTM
D-149
Material
/n
this
Test
Methods
Manual
was
voluntarily
established
by
Technical
Committees
of
I
PC.
This
material
/s
advisory
only
and
"s
use
or
adaptation
，
s
entirely
voluntary.
IPC
disclaims
all
liability
of
any
kind
as
to
the
use,
application,
or
adaptation
of
this
material.
Users
are
also
wholly
responsible
for
protecting
themselves
against
all
claims
or
liabilities
for
patent
infringement.
Equipment
referenced
/s
for
the
convenience
of
the
user
and
does
not
imply
endorsement
by
IPC.
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1
of
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