IPC-TM-650 EN 2022 试验方法.pdf - 第63页

1.0 Scope This method is designed to determine the thick- ness of woven glass fabric, such as E-glass, S-glass, and quartz, used as reinforcement in prepreg (resin-impregnated glass fabric, or B-stage). It is applicable …

1.0

Scope

This

test method identifies the major areas of

concern during a visual examination and describes the recom-

mended procedures.

2.0

Application Documents

None.

3.0

Test Specimen

Any

representative clad or unclad

sample of printed wiring material.

4.0

Equipment/Apparatus

Magnifier

or microscope

capable of up to 30X magnification, having a reticle capable of

measuring to the nearest 0.001 in.

5.0

Procedures

5.1 Pinholes

Pinholes

are predetermined by visual exami-

nation using not less than 10X magnification on the specimen.

Copper surfaces should be prepared by cleaning or light etch-

ing.

5.2

Pits and Dents

The

maximum total point count for pits

and dents, per square foot of panel inspected is determined

as follows:

Longest Dimension (inch) ..................................... Point Value

0.000 to 0.010 inclusive....................................................... 1

0. 011 to 0.020 inclusive ..................................................... 2

0.021 to 0.030 inclusive....................................................... 4

0.031 to 0.040 inclusive....................................................... 7

over 0.040 ......................................................................... 30

Pits and dents should be determined visually using not less

than 10X magnification on the specimen.

5.3

Scratches

can be measured with the use of

a microscope (30X maximum).

5.4

Wrinkles

should be viewed by normal or cor-

rected 20/20 vision.

5.5

Inclusions

should be measured using 18X

to 30X magnification.

6.0 Notes

For

additional reference see:

IPC-CF-150: Copper Foil

IPC-A-600: Acceptability of Printed Boards

MIL-P-13949: Laminate Materials

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.1.5

Subject

Surface

Examination, Unclad and Metal-Clad

Material

Date

12/82

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.

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1.0

Scope

This

method is designed to determine the thick-

ness of woven glass fabric, such as E-glass, S-glass, and

quartz, used as reinforcement in prepreg (resin-impregnated

glass fabric, or B-stage). It is applicable for glass fabric

inspection before and after impregnation.

2.0

Applicable Documents

FED-STD-191

3.0 Test Specimens

3.1 Size

Specimen

size of 101.6 x 101.6 mm [4.0 x 4.0 in]

is recommended; specimens used for determination of resin

content by Burn Off Method may be used. Specimens shall be

of sufficient size to insure that all points of the pressure foot of

the thickness gauge shall be at least 6.4 mm [0.25 in] from the

edge of the specimen.

3.2

Quantity and Sampling

Unless

otherwise specified,

three pieces of material shall be cut one each from three

sample sheets. Specimens shall be cut with the edges on a

bias to the orientation of the fabric. Specimens shall be free of

folds, creases, knots or other distortions which are not repre-

sentative of the material surface.

4.0

Apparatus or Material

4.1 Muffle furnace

Muffle

furnace that is capable of main-

taining 550 +/-50°C [1022 ±90°F].

4.2

Thickness Gage (Dead weight type)

dead weight

type thickness gage equipped with a dial graduated to read

with a precision of 0.0025 mm [0.0001 in] shall be used. The

pressure foot shall be circular with a diameter of 6.35

±0.025 mm [0.25 ±0.001 in], and with the moving parts

weighted to apply a total load of 173 ±14 kPa (25 ±2 psi) to

the specimen. The anvil shall be not less than 6.35 mm [0.250

in] in diameter. The micrometer shall be capable of repeating

its readings to 0.0013 mm [0.00005 in] at zero setting or on a

steel gage block.

5.0

Procedure

5.1 Preparation of Prepreg Specimens

Place specimens

in a muffle furnace at 550±50°C [1022 ±90°F], for a period of

time necessary to assure complete removal of the organics

(resin). After removal from the muffle furnace, the specimens

shall be cooled to room temperature.

5.2

Thickness Determination

The

specimen shall be

placed on the thickness gauge anvil, and the pressure foot

shall be closed onto the specimen at a location outside the

area to be measured. The pressure foot shall be backed off to

a distance of 0.008 to 0.01 mm [0.0003 to 0.0004 in], the

specimen moved to the measurement position, and the pres-

sure foot then released onto the specimen. The pressure foot

shall be allowed to rest there for a minimum of 5 seconds. The

dial reading shall then be taken to the nearest 0.0025 mm

[0.0001 in].

5.3

Evaluation

Record

each reading and report the

average of three measurements to the nearest 0.025 mm

[0.001 in].

6.0 Notes

See

Federal Test Method Standard No. 191,

Method No. 5050 for additional information and background

on this procedure.

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.1.6

Subject

Thickness

of Glass Fabric

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

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ

1.0

Scope

This

method is designed to determine the

weight of a fabric by use of a small specimen. It is appropriate

for woven or nonwoven fabrics made with glass or other inor-

ganic yarns, or made with organic fibers or yarns.

2.0

Applicable Documents

None

3.0

Test Specimens

3.1 Test Specimen Configuration

Unless

otherwise

specified, the specimen shall consist of at least 2 pieces of

fabric with a maximum size of 127 x 178 mm [5.0 x 7.0 in] and

a minimum of 98 x 98 mm [3.88 x 3.88 in]. The total area shall

be greater than 29,000 sq mm [45 sq. in]. For example, three

pcs. of 102 x 102 mm [4 x 4 in] with a total area of 30,968 sq

mm [48 sq. in].

3.2

Quantity and Sampling

Specimens

shall be taken

from the fabric roll (as supplied by the manufacturer) no closer

to the selvage (or cut edge) than a distance equal to one-tenth

of the width of the roll. Unless otherwise specified, three

specimens shall be taken from the roll at randomly selected

locations.

4.0

Apparatus or Material

4.1

analytical balance capable of weighing to 0.001 gm.

4.2

Cutting Equipment

punch die or steel rule die

capable of cutting the specimens to a size per 3.1 and to

within 0.38 mm [0.015 in]. Alternately a razor blade knife, or

equivalent, plus a caliper, or equivalent measuring device, may

be used provided the precision requirement is met and the

fabric edges are cleanly cut.

5.0

Procedure

5.1

Prepare a specimen by cutting the specified pieces in

accordance with 3.0. Carefully handle the pieces to prevent

loss of yarns or fibers from the cut edges. When applicable,

the edges shall be cut on a bias to the orientation of the fab-

ric. If not using a die, measure the specimen dimensions to

the nearest 0.38 mm [0.015 in].

5.2

Determine

the weight of the specimen to within 0.1% on

the balance. (Note: care must be taken so that any loose

yarns unraveling from the cut are also weighed with the speci-

men.)

5.3

Evaluation

Calculate

the weight in grams per square

meter [ounces per square yard] as follows:

GSM = G

[

OSY

= 45.72 G

]

GSM

[OSY] = Grams per square meter [ounces per square

yard]

G = Total weight of specimen in grams [ounces]

A = Total area of specimens in square meter [square inches]

5.4

Report

the individual specimen weights and the

average of all specimens tested. Report the specimen size

and number of pieces per specimen.

6.0 Notes

None

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.1.6.1

(renumbered from 2.3.12)

Subject

Weight of Fabric Reinforcements

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

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ