IPC-TM-650 EN 2022 试验方法.pdf - 第101页

1.0 Scope This method is designed to determine dimen- sional conformance to specification of production-cut panels of laminate or prepreg for length, width, and perpendicularity. 2.0 Applicable Documents IPC-PC-90 3.0 Te…

1.0

Scope

This

test method is designed to determine the

minimum and maximum thickness of the base material of

metallic clad laminates by microsectioning and optical mea-

surement.

2.0

Applicable Documents

IPC-TM-650

Method

2.1.1, Microsectioning

IPC-TM-650

Method

2.2.18, Determination of Thickness of

Laminates, by Mechanical Measurement

3.0

Test Specimens

3.1 Size

Unless

otherwise specified, a specimen measuring

25.4 X 12.7 mm [1.0 X 0.5 in] shall be taken from the laminate

sample.

3.2

Quantity and Sampling

Unless

otherwise specified,

two samples shall be taken from the lot that represent the

centermost area and the edges, but no closer than 25.4 mm

[1.0 in] from the edge, of the as- manufactured sheet.

4.0

Apparatus or Material

4.1

Any

optical inspection measuring device with a capabil-

ity of 100X and 200X with an accuracy to 0.0025 mm [0.0001 in].

4.2

microsectioning system capable of preparing speci-

men mounts that can be used for this procedure.

5.0

Procedure

5.1 Preparation of Specimens

Each

specimen to be

measured shall be microsectioned in accordance with IPC-

TM-650, Method 2.1.1. The long dimension of the specimen

shall be in the plane of examination. Specimens may be

ganged in accordance with the sampling procedure.

5.2

Evaluation

Examine

the entire length of the specimen.

Determine and record the minimum and maximum thickness

of each specimen to the nearest 0.0025 mm [0.0001 in] using

100X magnification and in accordance with Figures 1 or 2, in

accordance with the applicable specification. Unless other-

wise specified, Figure 2 shall be used. Any referee measure-

ments shall be made at 200X magnifications.

5.3

Report

the minimum and maximum readings

found from each specimen inspected, and whether the Paral-

lel (Figure 1) or Radius (Figure 2) Method was used.

6.0

Notes

Cross-sectional

thickness relates to the effective

electrical insulation thickness and will usually be less than that

found by mechanical means (see IPC-TM-650, method

2.2.18). For determination of the laminate’s contribution to

overall board thickness, the mechanical approach is preferred

(when measuring thin cores for multilayer applications).

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062

IPC-TM-650

TEST

METHODS MANUAL

Number

2.2.18.1

Subject

Determination

of Thickness of Metallic Clad

Laminates, Cross-sectional

Date

12/94

Revision

Originating Task Group

MIL-P-13949 Test Methods Task Group (7-11b)

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

method is designed to determine dimen-

sional conformance to specification of production-cut panels

of laminate or prepreg for length, width, and perpendicularity.

2.0 Applicable Documents

IPC-PC-90

3.0

Test Specimens

3.1 Size

Production

cut panels in the dimensions intended

for shipment shall be used.

3.2

Sampling

rates shall be in accordance with

the applicable specification. (Also see 6.1.)

4.0

Apparatus or Material

Unless

otherwise specified,

precision of measurement apparatus shall be in accordance

with the applicable specification.

4.1

Vernier

calipers capable of measuring up to 914 ± 6.4

mm [36.0 ± 0.25 in] or equivalent.

4.2

Tape

measure capable of measuring up to 1829 mm

[72.0 in]

4.3

Carpenters

square, or equivalent

4.4

gauges, dial indicators or equivalent

5.0

Procedure

5.1 Length

Measure

the length of the edges of the panel

that are parallel to the grain direction using a vernier caliper.

5.2

Width

Measure

the length of the edges of the panel

that are perpendicular to the grain direction using a vernier

caliper.

5.3

Perpendicularity

5.3.1 Method A: by diagonals

5.3.1.1

Measure

the diagonals of the panel using vernier

caliper or tape measure.

5.3.1.2

Calculate

perpendicularity as follows:

D = D1–D2 (Maximum allowable difference in diagonals)

Where:

√

(L + T)

+ W

√

(L − T)

+ W

= Nominal length of panel [ins]

W = Nominal width of panel [ins]

Tii = Tolerance in inches per inch for perpendicularity

shown in the procurement document.

T = Tii x W (Tolerance in inches)

5.3.1.3

Calculate

the actual difference in the diagonals from

the measurements taken.

5.3.1.4 Compare

the actual difference to the allowable

maximum.

5.3.2

Method B: By carpenters square (‘‘Right Angle’’

Square)

5.3.2.1

Place

the panel in the carpenters square, contacting

the square by at least two corners.

5.3.2.2

Using

suitable means (see 4.4) measure the dis-

tance of the panel’s corner that does not contact the square.

5.3.2.3

Calculate

the perpendicularity by dividing the dis-

tance by the length of the longest dimension of the panel.

5.4

Evaluation

Compare

the measurements with dimen-

sional requirements of the applicable specification. Record the

number of panels that do not comply. Record the number of

noncomplying panels for each dimension—length, width, and

perpendicularity.

5.5

Report

the number of panels, specifying which dimen-

sion, that do not comply with the applicable specification.

6.0 Notes

6.1

Sampling

may also be determined by IPC-PC-90 on

materials produced by continuous processing.

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062

IPC-TM-650

TEST

METHODS MANUAL

Number

2.2.19.1

Subject

Length,

Width and Perpendicularity of Laminate

and Prepreg Panels

Date

12/94

Revision

Originating Task Group

MIL-P-13949 Test Methods Task Group (7-11b)

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

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1.0

Scope

This

procedure determines the percent metal

content for solder paste.

2.0

Applicable Documents

None

3.0

Test Specimen

grams of solder paste

4.0

Equipment/Apparatus

Balance

Crucible

or Beaker

Heat Source

Flux Solvent

5.0

Procedure

5.1 Preparation

5.1.1

Weigh

10 to 50 grams (to the nearest 0.01 gram) of

solder paste into a tared vessel suitable for melting the solder

paste.

5.2

Test

5.2.1

Melt

the solder at approximately 25°C above liquidus

of the alloy, remove from heat and allow solder to solidify.

5.2.2

Extract

melt from residual flux with a suitable solvent,

dry and weigh metal to within 0.01 grams to determine %

metal content.

5.3

Evaluation

Weight

of extracted metal

Weight

of original sample

x 100 = % Metal

Enter the results in Table 1 ‘‘Test Report on Solder Paste.’’

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062

IPC-TM-650

TEST

METHODS MANUAL

Number

2.2.20

Subject

Solder

Paste Metal Content by Weight

Date

1/95

Revision

Originating Task Group

Solder Paste Task Group (5-24b)

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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