IPC-TM-650 EN 2022 试验方法.pdf - 第286页

being careful that it is properly centered and the axis aligned with the jaws. 5.3.2.3 Test Conditions (1) Gage length 2.0 inches (2) Crosshead speed 2.0 inches/min. (3) Chart speed 20 inches/min. Note: At a chart speed …

1.0

Scope

determine the tensile strength (in PSI) and

the elongation (in percentage) of copper foil at ambient and

elevated temperatures by mechanical force testing.

2.0

Applicable Documents

ASTM-E-345

Tensile

Strength

3.0

Test Specimens

Copper

foil sufficient in size to permit

cutting or etching of five specimens 10 inches x

⁄

inch.

Specimens

must be clean cut and free of burrs and nicks.

4.0

Apparatus

4.1

Constant

strain rate tensile tester capable of pulling at

rate of 0.050 and 2.0 inches/minute.

4.2

JDC

#50 sample cutter

⁄

inch

wide x 10 inches long.

4.3

shear to cut 10 inches long sample to 6 inches long.

4.4

Mettler

Balance type P120 or equivalent.

4.5

Elevated

temperature chamber or fixture, attachable to

the tensile tester, capable of reaching and maintaining a tem-

perature of 180°C ±10°C during sample testing.

5.0

Procedure

5.1 Preparation of Samples

5.1.1

The

sample should be smooth and undistorted

(wrinkle free).

5.1.2

Use

the JDC #50 to cut five tensile specimens.

5.1.3

Cut

the five 10 inches long specimens to 6 inches

long.

Note: Accuracy is important in the

⁄

inch

x 6 inches dimen-

sions because it is used to determine foil thickness and cross-

sectional area.

5.2

Weighing Samples

5.2.1

Weigh

tensile sample to at least three places beyond

the decimal point, in grams.

5.2.2

Record

the weight and calculate the mean average

cross-sectional area.

Note: The density of electrodeposited copper is 8.909 gm/cc

(16.389 cc/in

8.909 gm/cc = 146 gm/in

The

density of rolled copper is 8.93 gm/cc (16.389 cc/in

8.93

gm/cc = 146.35 gm/in

Mean

average thickness =

Weight

of tensile sample in grams

Area of Tensile

sample in sq.

inches

The density

of copper in

gm/in

Mean

avg. cross-sectional area =

Weight

of tensile sample in grams

Area of Tensile

sample in sq.

inches

The density

of copper in

gm/in

5.3

General Test Information

5.3.1

the tensile tester is equipped with an area compen-

sator, dial the mean average cross-sectional area into it. If not

then the cross-sectional area has to be used to compute the

tensile strength.

Note:

Tensile Strength

lbs/in

Load

used to break sample in lbs.

Mean

average cross−sectional area

If Tensile Tester is equipped with area compensator after the

test is complete, the Tensile Strength can be read directly

from the chart.

5.3.2

Ambient Temperature Testing

5.3.2.1

Select

load range.

5.3.2.2

Place

the sample in the jaws of the Tensile Tester

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.4.18

Subject

Tensile

Strength and Elongation, Copper Foil

Date

8/80

Revision

Originating Task Group

Printed Board Test Methods (7-11d)

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.

age1of2

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ

being

careful that it is properly centered and the axis aligned

with the jaws.

5.3.2.3

Test Conditions

(1) Gage length 2.0 inches

(2) Crosshead speed 2.0 inches/min.

(3) Chart speed 20 inches/min.

Note: At a chart speed of 20 inches/min., a gage length of

2.0 inches and a crosshead speed of 2.0 inches/min. each

one inch of chart paper equals 5.0% linear elongation.

5.3.3

Elevated Temperature Testing

5.3.3.1

Select

load range.

5.3.3.2

Bring

temperature chamber or fixture up to 180°C

±10°C.

5.3.3.3

Open

temperature chamber and clamp foil sample

between tensile jaws. (Note: Caution must be exercised to

avoid excessive clamping pressures and to provide good

sample alignment for testing.)

5.3.3.4

temperature chamber and monitor sample

temperature with a thermocouple. Permit foil sample to dwell

at 180°C temperature for 5 minutes prior to tensile test. Maxi-

mum time at temperature should not exceed 10 minutes.

5.3.3.5

Test Conditions

(1)

Gage length 2.0 inches

(2) Crosshead speed 0.050 inches/min.

(3) Chart speed 20 inches/min.

Note: At a chart speed of 20 inches/min., a gage length of

2.0 inches and a crosshead speed of 0.050 inches/min., each

one inch of chart paper equals 0.125% linear elongation.

Note: Temperature chamber contains normal ambient air.

Inert gas atmosphere is not necessary, but may be used.

5.4

Evaluation

5.4.1

Activate

crosshead to break sample and make calcu-

lations of tensile strength in pounds/in

and

elongation in %.

5.4.2

Percent

elongation may be determined by fitting the

ends of the fractured specimen together carefully and mea-

suring the distance between the original gage marks to the

nearest 0.01 inch. Elongation is the increase in length of the

gage length, expressed as a percentage of the original gage

length.

Percent elongation =

length at break −original gage length X 100

original

gage length

5.4.3

Average

all five elongation readings.

6.0 Notes

6.1

For

guidance, typical values for tensile strength and

elongation are:

TENSILE

STRENGTH

Oz/ft

Electrodeposited

Standard

or high ductility As rolled

Light cold

rolled Annealed

lb/in

1/2

15,000 50,000 — 15,000

1 30,000 50,000 — 25,000

2 & over 30,000 50,000 25,000 25,000

ELONGATION

Oz/ft

Electrodeposited

rolled

Light cold

rolled AnnealedStandard High ductility

percent

percent min. percent min. percent min. percent

1/2 2 5 1/2 — 5

1 3 10 1/2 — 10

23151520

IPC-TM-650

Number

2.4.18

Subject

Tensile

Strength and Elongation, Copper Foil

Date

8/80

Revision

age2of2

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ

Scope

determine the tensile strength in Mpa (PSI) and

the elongation, in percentage, of electrodeposited copper

plating at ambient temperatures by mechanical force testing.

Applicable Documents

ASTM E-345

Standard

Test Methods of Tension Testing of

Metallic Foil

IPC-TM-650

IPC

Test Methods Manual

1.7 Reporting, Invalid Test Results

Test Specimen

3.1

Plated

copper samples prepared in sheet form for cut-

ting or etching into the appropriate pattern, or pattern plating

of the appropriate form.

3.2

Samples

may be in the form of strips of 13 mm x

152 mm [0.512 in x 5.98 in] or in the form of ‘‘dogbone’’

samples as described in ASTM E-345, Type A. The thickness

of the samples 0.05 mm to 0.1 mm [0.00197 in to

0.00394 in]. Testing shall be performed on ten samples (five

lengthwise and five crosswise). Specimens must be wrinkle

free, clean cut, and free of burrs and nicks.

Apparatus or Material

4.1

Constant

strain rate tensile tester capable of pulling at

rate of 0.05 mm/mm to 0.5 mm/mm [0.00197 in/in to

0.0197 in/in] per minute of the length of the reduced section

(or the distance between the grips for straight sided speci-

mens).

4.2

Sample preparation equipment

4.3

Sample

Size: 13 mm wide X 150 mm [0.512 in wide x

5.91 in long].

4.4

sample cutter capable of cutting samples to the

appropriate size {see 6.1).

4.5 A

phototool of tensile specimen of the appropriate size

(strip or dogbone).

4.6

Stainless

steel panel, type 304 or 321, 300 mm X

300 mm [11.8 in x 11.8 in] or of a size identical to that used

to produce plated product. The panel surface must be free of

pits, nicks, and scratches. Low carbon stainless steel per-

forms best.

4.7

Weighing

balance capable of resolving to 1 mg.

4.8

Precision

linear measuring device capable of measuring

to the nearest 0.025 mm [0.000984 in].

4.9 Precision

micrometer capable of measuring to the near-

est 0.0025 mm [0.0000984 in].

4.10 An

oven capable of maintaining 125 °C ± 5 °C [257 °F

± 9 °F].

Procedure

5.1 Samples Preparation

Samples

may be prepared

using the phototool Method 5.1.1 or the cut Method 5.1.2.

5.1.1

Phototool Method

5.1.1.1

Clean

the stainless steel panel using a standard acid

or alkali cleaner (preferably reverse current) and verify by per-

forming water-break test to insure cleanliness.

5.1.1.2

Apply

negative resist to stainless steel plate.

5.1.1.3 Image

plate with phototool and develop image using

any acceptable method.

5.1.1.4 Inspect

image for integrity.

5.1.1.5

Plate

the imaged panel with a current density

equivalent to production current density to a thickness of

0.05 mm to 0.1 mm [0.00197 in to 0.00394 in].

5.1.1.6

Rinse

and dry plate.

5.1.1.7

Remove

specimens from the stainless steel by lifting

a corner of the sample with a knife or razor exercising care not

to bend or in any way damage the sample.

2215

Sanders Road

Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.4.18.1

Subject

Tensile

Strength and Elongation, In-House Plating

Date

05/04

Revision

Originating Task Group

Rigid Printed Board Performance Task Group

(D-33a)

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.

age1of3

ASSOCIA

TION CONNECTING

ELECTRONICS INDUSTRIES

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ