1、 IEC 60749-9 Edition 2.0 2017-03 INTERNATIONAL STANDARD Semiconductor devices Mechanical and climatic test methods Part 9: Permanence of marking IEC 60749-9:2017-03(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no
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10、 give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 60749-9 Edition 2.0 2017-03 INTERNATIONAL STANDARD Semiconductor devices Mechanical and climatic test methods Part 9: Permanence of marking INTERNATIONAL ELECTROTECHNICAL
11、 COMMISSION ICS 31.080.01 ISBN 978-2-8322-4004-5 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC 60749-9:2017 IEC 2017 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references 5 3 Terms an
12、d definitions 5 4 Equipment . 6 5 Safety precautions . 7 6 Procedure 7 6.1 Solvents test . 7 6.2 Tape pull test 7 7 Failure criteria . 8 8 Summary . 8 Bibliography 9 IEC 60749-9:2017 IEC 2017 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SEMICONDUCTOR DEVICES MECHANICAL AND CLIMATIC TEST METHODS Par
13、t 9: Permanence of marking FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concer
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23、ion is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60749-9 has been prepared by IEC technical committee 47: Semiconductor de
24、vices. This second edition cancels and replaces the first edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) revision to Clause 4 Equipment by a complete rewriting of Cla
25、use 3 Terms and definitions; b) additional variant adhesive tape pull test. 4 IEC 60749-9:2017 IEC 2017 The text of this standard is based on the following documents: FDIS Report on voting 47/2348/FDIS 47/2373/RVD Full information on the voting for the approval of this International Standard can be
26、found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 60749 series, published under the general title Semiconductor devices Mechanical and climatic test methods, can be found on the
27、 IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a
28、revised edition, or amended. A bilingual version of this publication may be issued at a later date. IEC 60749-9:2017 IEC 2017 5 SEMICONDUCTOR DEVICES MECHANICAL AND CLIMATIC TEST METHODS Part 9: Permanence of marking 1 Scope The purpose of this part of IEC 60749 is to determine whether the marks on
29、solid state semiconductor devices will remain legible when subjected to the application and removal of labels or the use of solvents and cleaning solutions commonly used during the removal of solder flux residue from the printed circuit board manufacturing process. This test is applicable for all pa
30、ckage types. It is suitable for use in qualification and/or process monitor testing. The test is considered non-destructive. Electrical or mechanical rejects can be used for the purpose of this test. NOTE 1 This procedure does not apply to laser branded packages. Many available solvents that could b
31、e used are either not sufficiently active, too stringent, or even dangerous to humans when in direct contact or when fumes are inhaled. NOTE 2 The composition of solvents used in this document is considered typical and representative of the desired stringency as far as the usual coatings and marking
32、s are concerned. 2 Normative references There are no normative references in this document. 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC El
33、ectropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 3.1 solvent A mixture consisting of the following: one part by volume of isopropyl alcohol; three parts by volume of volatile petroleum spirits with a flash point greater than 60 C,
34、or three parts by volume of a mixture of 80 % by volume of kerosene and 20 % by volume of ethylbenzene Note 1 to entry: The solvent should be maintained at a temperature of 20 C to 30 C. 3.2 solvent B semi-aqueous based solvent, (defluxer), e.g. a terpene, aliphatic hydrocarbons, high molecular weig
35、ht alcohols, etc., or any equivalent national environmental agency-approved HCFC (hydrochlorofluorocarbon), terpene or demonstrated equivalent 6 IEC 60749-9:2017 IEC 2017 3.3 solvent C mixture consisting of the following: a) two parts by volume of deionized water; b) one part by volume of propylene
36、glycol monomethyl ether (laboratory reagent grade); c) one part by volume of monoethanolamine (laboratory reagent grade) Note 1 to entry: The solvent should be maintained at a temperature of 63 C to 70 C. 3.4 brush toothbrush with a handle made of a non-reactive material Note 1 to entry: The brush s
37、hould have at least three long rows of hard bristles, the free ends of which should lie substantially in the same plane. The toothbrush should be used exclusively with a single solvent and when there is any evidence of softening, bending, wear, or loss of bristles, it should be replaced. 3.5 brush s
38、troke brush stroke for solvent resistance testing is with normal hand pressure, approximately 0,6 N to 0,8 N Note 1 to entry: The brush stroke is directed in a forward direction, across the symbolized surface of the device being tested. 3.6 adhesive tape narrow strip of material, typically used to s
39、tick, hold or fasten, with the following properties: a) physical properties total thickness (mm) 0,06 elongation (%) 20 tensile (N/100mm) 440 adhesion (N/100mm) 25-55 application temperature (C) 10-55 b) electrical properties (required only to make the test non-destructive) static charge generation
40、(V) (23 2 C, 50 5 %RH) roll strip 50 plate strip 50 surface resistivity () IEC 61340-2-3 5 x 109 charge decay time, seconds FED-STD-101C, Method 4046 0,1 Note 1 to entry: Some adhesive tapes can generate electrostatic charges which cause potential ESD damage to the devices under test. Where this tes
41、t is to be applied non-destructively, it is recommended that the electrical characteristics of the adhesive tape are verified with the manufacturer. Note 2 to entry: The SI unit of surface resistivity () is sometimes referred to as /sq (ohms per square), to distinguish resistivity values from resist
42、ance values. However, the use of /sq is deprecated because it can imply a resistance per unit area, which is not correct. 4 Equipment The equipment used consists of the following: a) three brushes as defined above; b) three containers (beakers), a minimum of 400 ml to 500 ml in size, each made from
43、non- reactive materials such as stainless steel, naldene, or glass; IEC 60749-9:2017 IEC 2017 7 c) an explosive-proof hot plate capable of maintaining solvents B and C at the temperatures defined above. 5 Safety precautions Solvents listed above exhibit some potential health, environmental and safet
44、y hazards. The following safety requirements and precautions are to be followed at all times: a) always work under a well-vented hood. Avoid inhalation of vapours at all times; b) safety glasses/eye protection and solvent resistant gloves must be worn at all times while performing this test; c) solv
45、ents are to be kept in covered vessels at all times when not in direct use; d) avoid contact with skin or eyes, and exposures to open flames or hot surfaces. 6 Procedure 6.1 Solvents test The solvents test is performed in the order shown below: a) Label the three vessels, three brushes, and three tw
46、eezers, A, B, and C. Divide the test specimens into three equal groups and fill the three vessels with the appropriate solvents A, B, and C, respectively. b) Each test group, along with a brush, shall be totally immersed for 1 min in each of the solvents. c) At the end of the exposure time, the spec
47、imens shall be removed from each solvent and brushed with normal pressure (approximately 0,6 N to 0,8 N) for ten strokes in a forwards direction on the portion of the specimen where the marking is present. d) At the conclusion of the brushing, place the devices and the brush back into the vessel of
48、the appropriate solvent. e) Repeat the procedure above until a total of three immersions and brushings has occurred. f) Following the third immersion and brushing, rinse the specimens with deionized water, place them on a clean surface, and allow them to dry at room temperature for a minimum of 5 mi
49、n before inspection. 6.2 Tape pull test The tape pull test is performed in the order shown below: a) Obtain marked devices and ensure the ink has been cured. The parts shall be at room temperature and the surfaces should be clean and dry. b) Place devices mark side up onto the conductive foam mat to provide ESD protection. c) Remove the tape from the dispenser at a continuous rate as opposed to jerking the tape. The amount of tape shall be sufficient to
