IPC-TM-650 EN 2022 试验方法.pdf - 第96页

1 Scope This method defines the procedure for determin- ing the roughness or profile of metallic foils. 1.1 The surface finish or roughness of foils shall be evalu- ated using R a .R a is defined as the arithmetic averag…

able 2 Test Report on Solder Paste

Enter appropriate information in top portion of report and complete report by entering the test results or checkmarks in the appropriate spaces.

Inspection Purpose: QPL I.D. Number:

Qualiﬁcation Manufacturer’s Identiﬁcation:

__ Quality Conformance A Manufacturer’s Batch Number:

Quality Conformance B Date of Manufacture:

Shelf-Life Extension Original Use-By Date:

Performance Revised Use-By Date:

Date

Inspection Completed:

Overall

Results: __ Pass __ Fail

Inspection Performed by:

itnessed by:

Inspections

User’s

Actual

Requirement Test Result P/F (*) Tested by & Date

Material

Visual

Metal Content

Viscosity

Solder Ball

Slump

Alloy

Flux

Powder Size

% In Top Screen

% In Next Screen

% In Bottom Screen

% In Receiver Bottom

Max. Powder Size

Powder Shape

Tack

Wetting

* P/F = PASS/FAIL; enter P if test results are within tolerance of actual requirement; otherwise, enter F

IPC-TM-650

Number

2.2.14.3

Subject

Determination

of Maximum Solder Powder Particle Size

Date

1/95

Revision

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Scope

This

method defines the procedure for determin-

ing the roughness or profile of metallic foils.

1.1

The

surface finish or roughness of foils shall be evalu-

ated using R

defined as the arithmetic average value of

all absolute distances of the roughness profile from the center

line within the measuring length.

1.2

The

foil profile of foils shall be evaluated using the

parameter R

(DIN)

or R

which is defined as the average

maximum peak to valley height of five consecutive sampling

lengths within the measurement length. This value is approxi-

mately equivalent to the values of profile determined from

microsectioning techniques.

1.3

(ISO)

is a different parameter from R

(DIN)

and is not

applicable to this method.

Applicable Documents

DIN 4768

ISO 4287

3 Test Specimens

Cut

a specimen 101 x 101 mm [4 x 4

in] minimum from the representative sample. The location and

number of specimens shall be defined in the material specifi-

cation.

Apparatus/Materials

4.1

Knife

or other suitable device.

4.2

Profilometer

or surface roughness meter with a motor-

ized drive and the following parameters:

Parameter Value

Cut Off 0.8 mm

Measuring Length 4.0 mm

Tracing Length <5 mm

Diamond Stylus Radius 0.005 mm

Roughness Parameter

per 1.1

ZDIN

per 1.2

Note: See Footnote No. 1 for equipment found suitable for

determination of both R

and

ZDIN

(or

4.3

Roughness Standard

Smooth

Side: R

with

5% or better certified tolerance

Treated Side: R

DZIN

(or

)

with 5% or better certified toler-

ance

4.4

Plate

glass or other smooth flat surface

4.5

Compressed

air

4.6

Gloves,

lint free

4.7

Tape

or weight

Procedure

5.1

Check

the profilometer calibration using the appropriate

roughness standard for the value R

ZDIN

)

and mag-

nitude to be measured. Insure the stylus moves perpendicular

to the grooves and the surface.

Note: For R

measurements,

known standards are available in

1, 3 and 10 micrometer nominal values. See footnote 2.

5.1.1

Compare

the values obtained on six different mea-

surements taken at different locations within the standard to

the certified (not nominal value) of the standard. If the average

result is not within 2% of the standard value, adjust the instru-

ment and repeat 5.1 until this tolerance is achieved.

5.2

Place

the foil test specimen on the plate glass surface

with the side to be tested away from the glass. Secure the

specimen with tape or a weight at both ends to prevent move-

ment or buckling during the measurement.

Profilometers which have been used to measure both R

and

are:

Surtronic 3 by Taylor Hobson (R

and

)

(see 8.2); M4P by Perthen (see 8.1) (R

and

ZDIN

Standards for R

DZIN

are

available from: see 8.1, PGN-3 3 micrometer nominal, PGN-10 10 micrometer nominal.

2215 Sanders Road

Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.2.17A

Subject

Surface

Roughness and Profile of Metallic Foils

(Contacting Stylus Technique)

Date

2/2001

Revision

Originating Task Group

Metallic Foils Task Group (3-12A)

Material

in this Test Methods Manual was voluntarily established by Technical Committees of 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 IPC.

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5.3

necessary, and for referee tests, blow the surface to

be tested with clean compressed (or canned) air to remove

loose debris.

5.4

Place

the profilometer drive mechanism such that the

probe travels across the foil in the transverse direction.

5.5

Set

the measurement parameters required in 4.2.

5.6

Initiate

the drive mechanism to make a single determina-

tion of the desired parameter.

5.7 Move

the drive mechanism and make two additional

measurements in two other areas of the specimen.

Calculation

6.1

Calculate

the average value for the three determinations

on the specimen.

6.2

Use

the average value of one or more specimens to

conform to the value specified in the material specification.

Report

7.1

Report

the value required by the specification to the

nearest 0.1 microinch or 0.01 micrometer for R

and

to the

nearest 0.01 mils or 0.1 micrometer for R

Apparatus Sources

8.1

Perthometer

M4P; STDS PGN-3 and PGN-10

Atlantech Sales Inc.

8825 Roswell Rd., Suite 591

Atlanta, GA 30350

(404) 992-3329

8.2

Surtronic

Rank Taylor Hobson LTD

PO Box 36

Gathlaxton St.

Leicester LE2 OSL England 0533-23801

8.3

Rodenstock

RM600 Laser Profilometer -

Noncontacting

Mahr Corp.

11435 Williamson Road

Cincinnati, OH 45241

IPC-TM-650

Number

2.2.17A

Subject

Surface

Roughness and Profile of Metallic Foils (Contacting

Stylus Technique)

Date

2/2001

Revision

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