IPC-TM-650 EN 2022 试验方法.pdf - 第118页

continuously recorded, and the recorded load for the entire length of peeled conductor shall be evaluated by averaging the chart recording values for each segment (immersed and non-immersed) of each test specimen. A mini…

be rinsed for one (1) minute minimum to five (5) minutes maxi-

mum in its own dedicated deionized (DI) water rinse which is

maintained at 55 °C ± 5 °C [131 °F ± 9 °F].

a) Etchant Solution: An aqueous solution of 450 grams ± 4.5

grams Cupric Chloride Dihydrate [CuCl

.2H

0] (CAS

10125-13-0) and 150 ml±2mlReagent Grade (36.5-

38%) Hydrochloric Acid [HCl] (CAS 7647-01-0) with a spe-

cific gravity of 1.155 - 1.164 [19° - 21° Baum?] diluted in

one liter of water, 55 °C ± 5 °C [131 °F ± 9 °F].

b) Stripper Solution: An aqueous solution of 5.0% Potassium

Hydroxide [KOH] (CAS 1310-58-3) with the equivalent

of 0.5% Monoethanolamine [HO(CH

)

] (CAS 141-

43-5) and 0.5% Propylene Glycol Monobutyl Ether

[CH

CH(OH)CH

O(CH

)

] (CAS 5131-66-8), 55 °C ±

5 °C [131 °F ± 9 °F] or an equivalent commercial stripper

solution.

c) Acid Cleaner: 2N Sulfuric Acid [H

SO4] (CAS 7664-93-9),

23 °C ± 2 °C [73.4 °F ± 3.6 °F]

d) Organic Cleaner: 70% ± 5% Isopropanol [(CH

)

CHOH]

(CAS 67-63-0), 23 °C ± 2 °C [73.4 °F ± 3.6 °F]

4.7.1 Other Chemicals Other specified chemicals may be

added where the customer/supplier have specific process

requirements. A list of fluids or chemicals may be specified

where the end product circuit will be subjected to specific

environments, such as: fuels, cleaning solvents, etc.

5 Procedures

5.1 Method A – Metal-Clad Dielectric

5.1.1 Test Specimen Preparation

Prepare a minimum of

six (6) test specimens [twice as many minimum as required for

one set of tests, allowing for at least one repetition, if needed]

in accordance with Figure 1 using standard commercial prac-

tices. Do not remove the etch resist. Measure the conductor

width of the test specimen to ensure compliance with width

requirements. Mark the halfway line for the subsequent dip-

ping tests with a piece of platers tape or similar method on the

nonpatterned side (back side) of each test specimen, in

accordance with Figure 2.

5.1.2 Conditioning Condition each test specimen for 24

hours +1/-0 hours at 23 °C±2°C[73.4 °F ± 93.6 °F] and

50% ± 5% relative humidity prior to testing.

5.1.3 Test Procedure

5.1.3.1 Sequential Chemical Exposure Test

Immerse

three (3) test specimens for one minute [+10 seconds/-0 sec-

onds] halfway into each of the specified chemicals. After

immersion in each chemical, rinse each test specimen in the

appropriate dedicated immersion DI water rinse which is

maintained at 55 °C±5°C[131 °F ± 9 °F] for one (1) minute

minimum and five (5) minutes maximum. Use the sequence as

follows:

1. Etchant Solution

2. Dedicated Etchant DI Immersion Rinse

3. Stripper Solution

4. Dedicated Stripper DI Immersion Rinse

5. Acid Cleaner

6. Dedicated Acid Cleaner DI Immersion Rinse

7. Organic Cleaner

8. Dedicated Organic Cleaner DI Immersion Rinse

Within fifteen (15) to thirty (30) minutes after completion of the

sequential chemical exposure, observe for tackiness, blister-

ing, bubbles, delamination, or swelling within the dielectric,

blistering or delamination of the copper and dielectric, or

change in color of dielectric. After sixteen (16) to twenty-four

(24) hours, repeat the observations and peel the conductors

for the immersed and non-immersed specimens, using the

following procedure [see IPC-TM-650, Method 2.4.9 (Method

A)].

Attach the test specimen to the free wheeling rotary drum test

fixture with double-sided tape, cement and/or mechanical

clamps. The referee attachment technique will be double-

sided adhesive tape. Peel the conductor at a rate (crosshead

speed) of 50.8 mm/minute [2.0 in/minute]. The peel load shall

be between 15 - 85 percent of the range of the scale used on

the testing machine.

5.1.4 Data Evaluation Record and report all discrepancies

noted during the observation periods The peel load shall be

IPC-232g-2

Figure 2 Chemical Resistance Test Pattern with Halfway

Line Marking Example

Immersion Line

Tab end Immerse this end

IPC-TM-650

Number

2.3.2

Subject

Chemical Resistance of Flexible Printed Board Materials

Date

12/07

Revision

Page2of3

continuously recorded, and the recorded load for the entire

length of peeled conductor shall be evaluated by averaging

the chart recording values for each segment (immersed and

non-immersed) of each test specimen. A minimum of 57.2

mm [approximately 2.25 in] shall be peeled for each seg-

ment, with the first 6.4 mm [approximately 0.25 in] to be dis-

regarded. Compare the average peel strengths of the

immersed segments of the three (3) test traces with those of

the non-immersed segments of the same three (3) test traces,

in accordance with the following formula:

[Average Peel Strengths of three (3)

immersed test trace segments]

x100=%ofOriginal

†

[Average Peel Strengths of three (3)

non-immersed test trace segments]

†

NOTE: Values may be higher than 100%, which may indicate chemical

absorption.

5.2 Method B – Bare Dielectric

5.2.1 Test Specimen Preparation

Cut twelve (12) test

specimens, as per 3.2. This allows for at least one full repeti-

tion of tests, if needed.

5.2.2 Conditioning Condition each specimen for 24 hours

at23°C±2°C[73.4 °F ± 3.6 °F] and 50% ± 5% relative

humidity prior to testing.

5.2.3 Test Procedure

5.2.3.1 Sequential Chemical Exposure Test

Fully

immerse three (3) test specimens for one (1) minute [+10

seconds/-0 seconds] into each of the specified chemicals on

a sequential basis. After immersion in each chemical, rinse the

specimen in the appropriate dedicated immersion DI water

rinse which is maintained at 55 °C±5°C[131 °F ± 9 °F] for

one (1) minute minimum and five (5) minutes maximum. Use

the sequence as follows:

1. Etchant Solution

2. Dedicated Etchant DI Immersion Rinse

3. Stripper Solution

4. Dedicated Stripper DI Immersion Rinse

5. Acid Cleaner

6. Dedicated Acid Cleaner DI Immersion Rinse

7. Organic Cleaner

8. Dedicated Organic Cleaner DI Immersion Rinse

Within fifteen (15) to thirty (30) minutes after completion of the

sequential chemical exposure, observe for tackiness, blister-

ing, bubbles, delamination, or swelling within the dielectric or

change in color of dielectric. After sixteen (16) to twenty-four

(24) hours, repeat the observations and determine the tensile

strength and elongation using the procedure as described in

IPC-TM-650, Method 2.4.18.3.

5.2.4 Data Evaluation Record and report all discrepancies

noted during the observation periods. The evaluation is con-

sidered to have passed when the immersed specimens meet

or exceed the minimum tensile strength and elongation

requirements for the material under test. If the immersed test

specimens do not pass, then the non-immersed specimens

shall be tested for both tensile strength and elongation to

verify that these parameters pass the requirements for the

material under test. If the non-immersed test specimens do

not pass, then the lot of bare dielectric, represented by the

test specimens, shall be rejected.

IPC-TM-650

Number

2.3.2

Subject

Chemical Resistance of Flexible Printed Board Materials

Date

12/07

Revision

Page3of3

1.0

Scope

This

test method is used for determining that

marking inks and/or color coding will not become illegible or

discolored when subjected to solutions that are normally used

as cleaning agents for printed boards or printed board assem-

blies.

2.0

Applicable Documents

None

3.0

Test Specimens

Test

specimens may consist of test

coupons or production printed boards with the appropriate

markings. The amount or size of the marking on the test

specimen shall be sufficient enough to satisfactorily perform

the procedure of section 5.

4.0

Apparatus or Material

4.1

Vessel

for each solution used.

4.2

Toothbrush

or suitable applicator for each solution used.

4.3

Optical

Aid capable of a 3X magnification.

4.4

Solution

A: Mixture of one part isopropyl alcohol and

three parts by volume of mineral spirits at 25 ± 5°C.

4.5

Solution

B: Terpene defluxer consisting of a minimum of

90% d-limonene and 10% surfactant at 25 ± 5°C.

4.6

Solution

C: Mixture of 42 parts by volume of water (1

megohm resistivity), one part by volume of propylene glycol

monmethyl ether, and one part by volume of monoethanola-

mine at 63 to 70°C.

5.0

Procedure

5.1

The

following procedure shall be using solutions A, B,

and C individually.

5.1.1

The

test specimens shall be submerged for a mini-

mum of 3 minutes (+ .5 minutes/ – 0.0 minutes) in a vessel

containing the solution.

5.1.2

The

test specimens shall be removed from the vessel

and with a toothbrush (wetted with solution) the specimen

shall be brushed for a minimum of 10 strokes on the area

where the marking is present.

5.1.3

Steps

5.1.1 and 5.1.2 shall be repeated on the test

specimen two additional times.

5.1.4 After

the third submersion and brushing, the test

specimens shall be air or blown dry.

5.1.5

The

test specimens shall be evaluated in accordance

with 5.2.

5.2

Evaluation

After

the test has been performed, the test

specimens shall be examined for any markings that are miss-

ing in whole or part, faded, smeared, blurred or shifted to the

extent that they cannot be identified from a distance of 150

mm [6.0 in] or by examining with a optical aid using a magni-

fication of no more than 3X shall constitute a failure.

6.0 Notes

6.1

test solutions other than those described herein are to

be used, then the solutions should be agreed upon between

the vendor and customer prior to testing.

6.2

The

three solutions being used to perform this test

exhibit some potential for health and safety hazards. Safety

precautions shall be observed.

6.3

is the intent of this test method to subject a different

set of test samples to each test solutions. It is at the option of

the tester to subject the samples through the test solutions

consecutively. If the samples fail after consecutive solutions

the test should be performed with individual test solutions.

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.3.4

Subject

Chemical

Resistance, Marking Paints and Inks

Date

8/97

Revision

Originating Task Group

Rigid Board T.M. Task Group, 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.

age1of1

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ