IPC-TM-650 EN 2022 试验方法.pdf - 第375页

1.0 Scope This test method defines the procedure for determining the Volumetric Thermal Expansion of polymer coatings on inorganic substrates, such as polyimide on a sili- con wafer. The expansion is measured using an ap…

5.11

some instruments ∆L and ∆T may be read directly

from the recorder chart. On other instruments, constant fac-

tors (from the instrument calibration - see section 6.3) may

need to be applied to the chart readings to obtain these val-

ues.

6.0 Notes

6.1

Calibration

of the instrument must be carried out

according to the manufacturer’s recommendations. Two cali-

brations are required, one to establish the baseline and the

other to calibrate the TMA relative to a standard.

6.2

quartz specimen of 11-13 mm in length (between the

grips) is run at 5°C/min under inert gas purge (He) from −20

to 400°C to establish a baseline. The baseline is used to elimi-

nate the effects of grip expansion on extension measure-

ments. The coefficient of average thermal expansion of quartz

is 0.57 x 10

-6

/°C

(16-500°C)

This baseline procedure should

be used to either correct the instrument performance to

obtain the literature stated value of linear thermal expansion

quartz, or, in the event the instrument cannot be adjusted to

obtain this value, obtain an estimated correction factor which

is then applied to results from test specimens.

6.3

Using

a calibration standard with dimensions equivalent

to the test specimen, a calibration standard is run between

−10 and 200 °C and the observed coefficient of thermal

expansion is calculated using the expression:

=(∆L/∆T)/L

where L is the length of the test specimen between the grips.

∆L is the change in the length of the specimen (in the same

units) over the temperature interval ∆T, and ∆T is nominally

200 °C. The units of α

are

°C

−1

An estimated test specimen

correction factor, C, is then determined by dividing α

the

literature value, α

lit

for the standard(s). The estimated test

specimen correction factor is then as a multiplcation factor

and applied to the observed linear thermal expansion results

for the test specimens.

6.4

The

maximum temperature used in this test should be at

least 25°C below the glass transition temperature of the mate-

rial being studied. Heating above the glass transition may alter

the morphology of the specimen (e.g., change the molecular

orientation) leading to erroneous results. For materials with

glass transitions below 250°C, the temperature range over

which the coefficient of linear thermal expansion was deter-

mined must be noted, e.g., 50 x 10

-6

/°C

(0-150°C).

Lange’s Handbook of Chemistry, 12th edition, J. A. Dean, ed., McGraw-Hill, New York (1979).

IPC-TM-650

Number

2.4.41.3

Subject

In-Plane

Coefficient of Thermal Expansion, Organic Films

Date

7/95

Revision

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1.0

Scope

This

test method defines the procedure for

determining the Volumetric Thermal Expansion of polymer

coatings on inorganic substrates, such as polyimide on a sili-

con wafer. The expansion is measured using an apparatus

designed for the determination of the Pressure/Volume/

Temperature behavior of solid samples.

2.0

Applicable Documents

None

3.0

Test Specimens

See

Sample Preparation 5.1.

4.0

Apparatus or Material

GNOMIX

PVT or equivalent

capable of providing PVT data over its pressure range 0-200

MPa (2000 bar or 29,000 psi), and from ambient tempera-

tures to 400°C.

5.0

Procedure

5.1 Sample Preparation

Samples

are prepared by form-

ing a 25 mm thick film on a wafer and lifting the specimen free

according to manufacturer’s recommendations. Sample is cut

and folded to fit in the sample chamber of the PVT apparatus.

5.2

Test Procedure

The

film sample (1 to 2 grams mass)

is placed in a rigid stainless steel cell. The cell is surrounded

by a ‘‘sample cup’’ which guarantees a hydrostatic state of

stress in the sample at all times. Follow the testing protocol

according to the PVT Operations Manual for the measurement

of the volumetric expansion.

5.3

Test Analysis

Report

the volumetric expansion of the

material from room temperature to 300°C and the tempera-

ture of any observed transitions.

6.0 Notes

6.1

Pressure/Volume/Temperature

(PVT) Apparatus: One

source is Gnomix, 3809 Birchwood Drive in Boulder, CO (303)

444-3395.

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.4.41.4

Subject

Volumetric

Thermal Expansion Polymer Coatings on

Inorganic Substrates

Date

7/95

Revision

Originating Task Group

Deposited Dielectric Task Group (C-13a)

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.

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1.0

Scope

This

procedure establishes the performance

and test guidelines for the break-off torque of adhesives used

by placement equipment to attach surface mounted devices

to printed wiring boards.

2.0

Applicable Documents

None

3.0

Test Specimen

•

Apply a 1.25 mm [0.05 in] diameter circle of adhesive 0.1

mm [0.004 in] thick to a FR-4 substrate.

• Place a type 1206 resistor firmly onto the circle of adhesive.

• Cure adhesive according to manufacturers directions.

4.0

Equipment

4.1 Torque Tester

Waters Manufacturing torque watch

(or equivalent) witha0to140or0to280Nmmscale is to be

used. The torque gauge must have a separate indicator

needle to register maximum torque.

4.1.1

Torque Fixture

Use

torque fixture modified per

sample being tested.

5.0

Procedure

5.1 Sample Placement

Place

the samples board in the

test fixture.

5.1.1

Zeroing the Gauge

Rotate

the face knob of the

tester per until the maximum torque indicator needle is

zeroed.

5.1.2

Testing Sample

Using

the thumb and forefinger, and

middle finger of the right hand slowly rotate the torque gauge

in a clockwise direction until the component breaks off.

5.1.3

Torquing Techniques

Components

to be torqued

should be centered inside the probe. The component should

not protrude from the probe when testing is begun.

5.1.4

Taking Reading

After

the component has been

torqued off, a reading of break-off torque shall be taken from

the face of the torque tester. This reading is shown by the

maximum torque indicator needle.

5.1.5

Completion of Torquing

Repeat

until 5 components

of the same type have been torqued off.

6.0 Notes

not raise or lower the gauge while turning. If

the gauge is lowered the increased friction against the board

will yield inaccurate readings. If the gauge is lifted it will lose

contact with the component and yield an inaccurate reading

as well.

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.4.42

Subject

Torsional

Strength of Chip Adhesives

Date

2/88

Revision

Originating Task Group

N/A

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.

age1of1

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ