IPC-TM-650 EN 2022 试验方法.pdf - 第72页

1 Scope This method describes a procedure for quantifying the presence of voids in flexible printed board materials. 1.1 Inclusions This test method no longer addresses inclu- sions which are inspected using ASTM D-149. …

Degree

IPC-TM-650

Number

2.1.10

Subject

Visual

Inspection for Undissolved Dicyandiamide

Date

12/94

Revision

age3of3

DEGREES

OF DICYANDIAMIDE (DICY) CRYSTALS

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1 Scope This method describes a procedure for quantifying

the presence of voids in flexible printed board materials.

1.1 Inclusions This test method no longer addresses inclu-

sions which are inspected using ASTM D-149.

2 Applicable Documents and Terms and Definitions

2.1 Applicable Documents

2.1.1 IPC

IPC-4202 Flexible Base Dielectrics for Use in Flexible Printed

Circuitry

IPC-4203 Cover and Bonding Material for Flexible Printed

Circuitry

IPC-4204 Flexible Metal-Clad Dielectrics for Use in Fabrica-

tion of Flexible Printed Circuitry

2.1.2 American Society for Testing and Materials

(ASTM)

ASTM D-149 Standard Test Method for Dielectric Break-

down Voltage and Dielectric Strength of Solid Electrical Insu-

lating Materials at Commercial Power Frequencies

2.2 Terms and Definitions

2.2.1 Void (Bubble/Hole)

The absence of any substances

in a localized area.

3 Specimens Each specimen: 30 cm x 30 cm [approx. 12

in x 12 in].

4 Test Equipment

4.1

A shear, paper cutter or similar cutting tool for cutting

30 cm X 30 cm [12 in X 12 in] samples.

4.2 Microscope or optical inspection device capable of up to

30X magnification.

4.3 Etching system capable of removal of metal cladding.

4.4 Chemical etchant capable of metal removal without det-

rimental effect to either the adhesive or dielectric.

4.5 Suitable light table for inspecting 30 cm x 30 cm

[approx. 12 in x 12 in] samples.

5 Procedure

5.1 Test Specimen Preparation

Three test specimens

30 cm x 30 cm [approx. 12 in x 12 in] in size are to be pre-

pared for examination/inspection. If the specimens are metal

clad, the metal foil is to be 100% removed by chemical etch-

ing, followed by rinsing and drying. If the specimens are

adhesive-coated on one or both sides, the protective cover

sheet(s) is/are to be completely removed.

5.2 Test Specimen Examination Using the light table and

30X magnification microscope or optical inspection device,

inspect 100% of each of the three 30 cm x 30 cm [approx.

12 in x 12 in] test specimens for voids. Measure and record

the number of voids found, along with the longest dimension

of each void to the nearest 0.013 mm [500 µin], which is con-

sidered to be the size of the void.

Record the size in mm [in], quantity, and type of void found

(bubble, hole, etc.). The requirements for number and size of

the voids are defined in the appropriate materials specifica-

tions: IPC-4202, IPC-4203 or IPC-4204.

1. www.ipc.org

2. www.astm.org

3000 Lakeside Drive, Suite 309S

Bannockburn, IL 60015-1249

IPC-TM-650

TEST METHODS MANUAL

Number

2.1.13

Subject

Inspection for Voids in Flexible Printed Board

Materials

Date

05/12

Revision

Originating Task Group

Flexible Circuits Test Methods Subcommittee

(D-15)

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.

Page1of1

1.0

Scope

This

method is intended to cover all mechanical

dimension inspections typically referenced on a Printed Board

drawing. This will cover non-optically enhanced measurement

techniques which are not covered by IPC-TM-650, Method

2.2.2.

2.0

Applicable Documents

ANSI NCSL Z540

International

Calibration Standards or

Physical Constants

3.0

Test Specimens

The

test specimen(s) shall be defined

in the applicable performance specification or standard.

4.0

Apparatus or Material

4.1

Mechanical

measurement gage capable of sufficient

accuracy precision and resolution to accomplish the neces-

sary measurement (i.e., calipers, micrometers, pin gages,

templates, etc.).

4.2

All

mechanical measurement gages shall be calibrated in

accordance with ANSI NCSL Z540, International Calibration

Standards or Physical Constants.

5.0

Procedure

5.1

Gages which use an origin based system (i.e., calipers,

micrometers) shall be initialized at the origin.

5.2

Operate

the gage in a manner consistent to obtain the

accuracy, repeatability, and precision required.

5.3 If

the attribute to be measured can vary across the

printed board, multiple measurements must be made to char-

acterize the variation within the sampled area (i.e., hole sizes,

thickness).

5.4

Read

and record the dimensions for the attribute(s)

measured using the same number of significant digits speci-

fied by the drawing, standard, or specification as a minimum

or maximum limiting value.

6.0 Notes

The

following items can affect the test results.

Tool wear & maintenance

Environment effects

Delicacy of gages – proper storage

Improper calibration

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062

IPC-TM-650

TEST

METHODS MANUAL

Number

2.2.1

Subject

Mechanical

Dimensional Verification

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

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