IPC-TM-650 EN 2022 试验方法--.pdf - 第246页
1 Sc ope Th is te st m eth od sp ec ifi es t ech ni que s for t he determination of machineability of a solder mask. 2 Applicable Documents Qual ifica tio n and P erfor mance o f P ermane nt Solder Mask Multipurpose One-…
The Institute for Interconnecting and Packaging Electronic Circuits
2215 Sanders Road • Northbrook, IL 60062-6135
Material in this Test Methods Manual was voluntarily established by Technical Committees of the IPC. This material is advisory only
and its use or adaptation is 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 is for the convenience of the user and does not imply endorsement by the IPC.
Page 1 of 1
IPC-TM-650
TEST
METHODS
MANUAL
1
Scope
This
method
is
designated
for
use
in
determining
the
ease
of
machining
of
plastic
materials
and
the
effect
of
such
machining
on
the
cutting
tools
and
plastic.
2
Applicable
Documents
None
3
Test
Specimen
3.1
Any
rigid
printed
wiring
material
on
a
finished
board
(con¬
ventional,
multilayer
or
flush)
4
Apparatus
4.1
All
typical
production
machine
tools
normally
used
in
the
fabrication
of
finished
printed
wiring
boards
Number
2.4.7
Subject
Machinability,
Printed
Wiring
Materials
Date
Revision
7/75
A
Originating
Task
Group
N/A
5
Procedure
5.1
Machining
The
machining
must
be
performed
by
a
skilled
mechanic.
The
technique
shall
be
as
standard
as
pos¬
sible
for
all
materials
in
order
that
comparisons
between
mate¬
rials
may
be
made.
5.2
Evaluation
After
machining
(i.e.,
drilling,
sawing,
and
machining
in
all
directions),
check
for
cracking,
splitting,
delaminating,
or
other
adverse
effects.
The
cutting
tools
should
show
reasonable
tendency
to
dull,
nick,
or
overheat.
1 Scope
This test method specifies techniques for the
determination of machineability of a solder mask.
2 Applicable Documents
Qualification and Performance of Permanent
Solder Mask
Multipurpose One-Sided Test Pattern
3 Test Specimens
Six (6) IPC-B-25A boards coated with
solder mask on the top side. Three are to be tested
as-received and three are to be tested after solder float expo-
sure.
The IPC-A-25A-G-KIT artwork package provides the Gerber
information necessary for the fabrication of the standard IPC-
B-25A test board.
4 Apparatus and Reagents
4.1 Drill
4.1.1
Drill speed of 1500 ± 250 rpm
4.1.2
Drill bit size of 6.35 mm [0.25 in]
4.2 Router
4.2.1
Speed of 20,000 ± 5,000 rpm
4.2.2
Router bit to be standard for printed board fabrication
and operation at recommended speed. Bit must be sharp and
in good working order.
4.3 Band Saw
4.3.1
Speed of (442 ± 76) m/min [(1450 ± 250) ft/min]
4.3.2
Blade of 1.2 cm [0.5 in] width, 0.89 mm [0.035 in]
gauge, and 10-14 pitch
4.4 Punch
4.4.1
2.5 cm [1 in] square die
4.4.2
Clearance range between punch and die to be [0.001
to 0.003 in]
4.5 Permanent Marker and/or Vibrating Scribe
4.6 Hammer or Mechanical Punching Apparatus
5 Procedures
5.1 Preconditioning
5.1.1
Process three of the IPC-B-25A coupons per IPC-SM-
840, Resistance to Tin-Lead Solder - Solder Float
5.2 Drilling
5.2.1
Drill three holes in each coupon directly below the
label ‘‘B’’ on the test specimen.
5.3 Routing
5.3.1
Route a straight edge along the top side of each cou-
pon.
5.3.2
Use a permanent marker or vibrating scribe to serial-
ize each resulting piece.
5.4 Sawing
5.4.1
Make a single cut along the bottom edge of each cou-
pon removing the finger tab area.
5.4.2
Use a permanent marker or vibrating scribe to serial-
ize each resulting piece.
5.5 Punching
5.5.1
Place the punch over the fiducial above the comb pat-
tern labeled ‘‘F’’ on the test specimen.
1. www.ipc.org/onlinestore
3000 Lakeside Drive
Bannockburn, IL 60015-1249
IPC-TM-650
TEST METHODS MANUAL
Number
2.4.7.1
Subject
Solder Mask - Determination of Machineability
Date
03/07
Revision
Originating Task Group
Solder Mask Performance Task Group (5-33b)
ASSOCIATION CONNECTING
ELECTRONICS INDUSTRIES
®
IPC-SM-840
IPC-A-25A-G-KIT1
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.
Page
1
of
2
5.5.2
Apply sufficient force to the punch using the appara-
tus in 4.6 to remove the section from the test specimen.
5.5.3
Use a permanent marker or vibrating scribe to serial-
ize each resulting piece.
5.6 Visual Examination
5.6.1
Visually examine each coupon and the extracted
pieces for evidence of tears or cracks of the solder mask.
6 Notes
6.1 Safety
Operator should be trained and familiar with the
hazards inherent to the chemicals being used and analyzed.
Proper personal safety equipment, such as safety glasses,
gloves and splash apron, and adequate ventilation shall be
used.
Number
2.4.7.1
Subject
Solder Mask - Determination of Machineability
Date
03/07
Revision
IPC-TM-650
Page
2
of
2