• IEC 60749-20:2008

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Semiconductor devices - Mechanical and climatic test methods - Part 20: Resistance of plastic encapsulated SMDs to the combined effect of moisture and soldering heat

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  31-12-2021

    Language(s):  English - French

    Published date:  09-12-2008

    Publisher:  International Electrotechnical Committee

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    Table of Contents - (Show below) - (Hide below)

    FOREWORD
    1 Scope
    2 Normative references
    3 General description
    4 Test apparatus and materials
      4.1 Humidity chamber
      4.2 Reflow soldering apparatus
      4.3 Holder
      4.4 Wave-soldering apparatus
      4.5 Solvent for vapour-phase reflow soldering
      4.6 Flux
      4.7 Solder
    5 Procedure
      5.1 Initial measurements
          5.1.1 Visual inspection
          5.1.2 Electrical measurement
          5.1.3 Internal inspection by acoustic tomography
      5.2 Drying
      5.3 Moisture soak
          5.3.1 General
          5.3.2 Conditions for non-dry-packed SMDs
          5.3.3 Moisture soak for dry-packed SMDs
      5.4 Soldering heat
          5.4.1 General
          5.4.2 Method of heating by infrared convection or
                convection reflow soldering
          5.4.3 Method of heating by vapour-phase reflow soldering
          5.4.4 Method of heating by wave-soldering
      5.5 Recovery
      5.6 Final measurements
          5.6.1 Visual inspection
          5.6.2 Electrical measurement
          5.6.3 Internal inspection by acoustic tomography
    6 Information to be given in the relevant specification
    Annex A (informative) Details and descriptions of test method
                          on resistance of plastic encapsulated SMDs
                          to the combined effect of moisture and
                          soldering heat

    Abstract - (Show below) - (Hide below)

    IEC 60749-20:2008 provides a means of assessing the resistance to soldering heat of semiconductors packaged as plastic encapsulated surface mount devices (SMDs). This test is destructive. This second edition cancels and replaces the first edition published in 2002 and constitutes a technical revision. The main changes are as follows:
    - to reconcile certain classifications of IEC 60749-20 and those of IPC/JEDEC J-STD-020C;
    - reference IEC 60749-35 instead of Annex A of IEC 60749-20, Edition 1;
    - update for lead-free solder;
    - correct certain errors in the original Edition 1.

    General Product Information - (Show below) - (Hide below)

    Committee TC 47
    Development Note Supersedes IEC 60749. (03/2008) Stability Date: 2020. (11/2017)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    09/30190356 DC : 0 BS EN 60749-40 - SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 40: BOARD LEVEL DROP TEST METHOD USING A STRAIN GAUGE
    BS EN 60749-35 : 2006 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 35: ACOUSTIC MICROSCOPY FOR PLASTIC ENCAPSULATED ELECTRONIC COMPONENTS
    BS EN 60068-2-58 : 2015 ENVIRONMENTAL TESTING - PART 2-58: TESTS - TEST TD: TEST METHODS FOR SOLDERABILITY, RESISTANCE TO DISSOLUTION OF METALLIZATION AND TO SOLDERING HEAT OF SURFACE MOUNTING DEVICES (SMD)
    BS EN 62137 : 2004 ENVIRONMENTAL AND ENDURANCE TESTING - TEST METHODS FOR SURFACE-MOUNT BOARDS OF AREA ARRAY TYPE PACKAGES FBGA, BGA, FLGA, LGA, SON AND QFN
    13/30264591 DC : 0 BS EN 60747-14-6 ED 1.0 - SEMICONDUCTOR DEVICES - PART 14-6: SEMICONDUCTOR SENSORS - HUMIDITY SENSOR
    BS EN 62137-4 : 2014 ELECTRONICS ASSEMBLY TECHNOLOGY - PART 4: ENDURANCE TEST METHODS FOR SOLDER JOINT OF AREA ARRAY TYPE PACKAGE SURFACE MOUNT DEVICES
    12/30271778 DC : 0 BS EN 62137-4 ED.1 - ELECTRONICS ASSEMBLY TECHNOLOGY - PART 4: ENDURANCE TEST METHODS FOR SOLDER JOINT OF AREA ARRAY TYPE PACKAGE SURFACE MOUNT DEVICES
    NF EN 60749-37 : 2008 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 37: BOARD LEVEL DROP TEST METHOD USING AN ACCELEROMETER
    05/30138794 DC : DRAFT SEP 2005
    I.S. EN 62137-4:2014 ELECTRONICS ASSEMBLY TECHNOLOGY - PART 4: ENDURANCE TEST METHODS FOR SOLDER JOINT OF AREA ARRAY TYPE PACKAGE SURFACE MOUNT DEVICES
    BS EN 60749-20-1 : 2009 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 20-1: HANDLING, PACKING, LABELLING AND SHIPPING OF SURFACE-MOUNT DEVICES SENSITIVE TO THE COMBINED EFFECT OF MOISTURE AND SOLDERING HEAT
    BS EN 60068-3-13:2016 ENVIRONMENTAL TESTING - PART 3-13: SUPPORTING DOCUMENTATION AND GUIDANCE ON TEST T - SOLDERING
    12/30263960 DC : 0 BS EN 60749-42 - SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 42: TEMPERATURE HUMIDITY STORAGE
    13/30264596 DC : 0 BS EN 60747-14-7 ED 1.0 - SEMICONDUCTOR DEVICES - PART 14-7: SEMICONDUCTOR SENSORS - FLOW METER
    BS EN 60749-37 : 2008 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 37: BOARD LEVEL DROP TEST METHOD USING AN ACCELEROMETER
    15/30269562 DC : 0 BS EN 60749-43 - SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 43: GUIDELINES FOR LSI RELIABILITY QUALIFICATION PLANS
    BS EN 60191-6-19 : 2010 MECHANICAL STANDARDIZATION OF SEMICONDUCTOR DEVICES - PART 6-19: MEASUREMENT METHODS OF THE PACKAGE WARPAGE AT ELEVATED TEMPERATURE AND THE MAXIMUM PERMISSIBLE WARPAGE
    16/30344796 DC : 0 BS EN 60749-6 - SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 6: STORAGE AT HIGH TEMPERATURE
    11/30243259 DC : 0 BS EN 60068-2-58 ED.4 - ENVIRONMENTAL TESTING - PART 2-58: TESTS TD- TEST METHODS FOR SOLDERABILITY, RESISTANCE TO DISSOLUTION OF METALIZATION AND TO SOLDERING HEAT OF SURFACE MOUNTING DEVICES (SMD)
    NF EN 60191-6-19 : 2010 MECHANICAL STANDARDIZATION OF SEMICONDUCTOR DEVICES - PART 6-19: MEASUREMENT METHODS OF PACKAGE WARPAGE AT ELEVATED TEMPERATURE AND THE MAXIMUM PERMISSIBLE WARPAGE
    BS EN 60749-21 : 2011 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 21: SOLDERABILITY
    13/30264600 DC : 0 BS EN 60747-14-8 ED 1.0 - SEMICONDUCTOR DEVICES - PART 14-8: SEMICONDUCTOR SENSORS - CAPACITIVE DEGRADATION SENSOR OF LIQUID
    I.S. EN 60749-35:2006 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 35: ACOUSTIC MICROSCOPY FOR PLASTIC ENCAPSULATED ELECTRONIC COMPONENTS
    09/30209670 DC : 0 BS EN 60749-21 - SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 21: SOLDERABILITY
    BS EN 61760-3:2010 (published 2010-06) Surface mounting technology Standard method for the specification of components for through hole reflow (THR) soldering
    BS EN 60749-42 : 2014 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 42: TEMPERATURE AND HUMIDITY STORAGE
    BS EN 60749-43:2017 Semiconductor devices - Mechanical and climatic test methods Guidelines for IC reliability qualification plans
    05/30135664 DC : DRAFT JUN 2005 IEC 60749-37 ED. 1 - SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 37: BOARD LEVEL DROP TEST METHOD FOR HANDHELD ELECTRONIC PRODUCTS
    09/30186180 DC : 0 BS EN 61760-3 ED.1 - SURFACE-MOUNTING TECHNOLOGY - PART 3: STANDARDS METHOD FOR THE SPECIFICATION OF COMPONENTS FOR THROUGH HOLE REFLOW (THR) SOLDERING
    I.S. EN 60749-6:2017 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 6: STORAGE AT HIGH TEMPERATURE
    09/30208070 DC : 0 BS EN 60749-30:2005+A1 - SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 30: PRECONDITIONING OF NON-HERMETIC SURFACE MOUNT DEVICES PRIOR TO RELIABILITY TESTING
    BS EN 60749-6 : 2017 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 6: STORAGE AT HIGH TEMPERATURE (IEC 60749-6:2017)
    BS EN 61760-4 : 2015 SURFACE MOUNTING TECHNOLOGY - PART 4: CLASSIFICATION, PACKAGING, LABELLING AND HANDLING OF MOISTURE SENSITIVE DEVICES
    CEI EN 60749-42 : 2016 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 42: TEMPERATURE AND HUMIDITY STORAGE
    CEI EN 60749-35 : 2012 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 35: ACOUSTIC MICROSCOPY FOR PLASTIC ENCAPSULATED ELECTRONIC COMPONENTS
    CEI EN 60749-37 : 2008 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 37: BOARD LEVEL DROP TEST METHOD USING AN ACCELEROMETER
    IEC TS 62686-1:2015 Process management for avionics - Electronic components for aerospace, defence and high performance (ADHP) applications - Part 1: General requirements for high reliability integrated circuits and discrete semiconductors
    IEC 61760-4:2015 Surface mounting technology - Part 4: Classification, packaging, labelling and handling of moisture sensitive devices
    I.S. EN 60749-30:2005 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 30: PRECONDITIONING OF NON-HERMETIC SURFACE MOUNT DEVICES PRIOR TO RELIABILITY TESTING
    IEC 60749-43:2017 Semiconductor devices - Mechanical and climatic test methods - Part 43: Guidelines for IC reliability qualification plans
    I.S. EN 60749-37:2008 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 37: BOARD LEVEL DROP TEST METHOD USING AN ACCELEROMETER
    I.S. EN 60749-43:2017 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 43: GUIDELINES FOR IC RELIABILITY QUALIFICATION PLANS
    CEI EN 60749-43 : 1ED 2018 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 43: GUIDELINES FOR IC RELIABILITY QUALIFICATION PLANS
    I.S. EN 61760-3:2010 SURFACE MOUNTING TECHNOLOGY - PART 3: STANDARD METHOD FOR THE SPECIFICATION OF COMPONENTS FOR THROUGH HOLE REFLOW (THR) SOLDERING
    EN 60749-43 : 2017 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 43: GUIDELINES FOR IC RELIABILITY QUALIFICATION PLANS (IEC 60749-43:2017)
    I.S. EN 60749-21:2011 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 21: SOLDERABILITY
    BS EN 60749-30 : 2005 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 30: PRECONDITIONING OF NON-HERMETIC SURFACE MOUNT DEVICES PRIOR TO RELIABILITY TESTING
    CEI EN 61760-4 : 2016 SURFACE MOUNTING TECHNOLOGY - PART 4: CLASSIFICATION, PACKAGING, LABELLING AND HANDLING OF MOISTURE SENSITIVE DEVICES
    I.S. EN 61760-4:2015 SURFACE MOUNTING TECHNOLOGY - PART 4: CLASSIFICATION, PACKAGING, LABELLING AND HANDLING OF MOISTURE SENSITIVE DEVICES
    CEI EN 60191-6-19 : 2011 MECHANICAL STANDARDIZATION OF SEMICONDUCTOR DEVICES - PART 6-19: MEASUREMENT METHODS OF THE PACKAGE WARPAGE AT ELEVATED TEMPERATURE AND THE MAXIMUM PERMISSIBLE WARPAGE
    I.S. EN 60749-20-1:2009 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 20-1: HANDLING, PACKING, LABELLING AND SHIPPING OF SURFACE-MOUNT DEVICES SENSITIVE TO THE COMBINED EFFECT OF MOISTURE AND SOLDERING HEAT
    NF EN 61760-3 : 2010 SURFACE MOUNTING TECHNOLOGY - PART 3: STANDARD METHOD FOR THE SPECIFICATION OF COMPONENTS FOR THROUGH HOLE REFLOW (THR) SOLDERING
    CEI EN 61760-3 : 2010 SURFACE MOUNTING TECHNOLOGY - PART 3: STANDARD METHOD FOR THE SPECIFICATION OF COMPONENTS FOR THROUGH HOLE REFLOW (THR) SOLDERING
    CEI EN 60749-20-1 : 2010 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 20-1: HANDLING, PACKING, LABELLING AND SHIPPING OF SURFACE-MOUNT DEVICES SENSITIVE TO THE COMBINED EFFECT OF MOISTURE AND SOLDERING HEAT
    NF EN 60749-20-1 : 2009 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 20-1: HANDLING, PACKING, LABELLING AND SHIPPING OF SURFACE-MOUNT DEVICES SENSITIVE TO THE COMBINED EFFECT OF MOISTURE AND SOLDERING HEAT
    I.S. EN 62137:2005 ENVIRONMENTAL AND ENDURANCE TESTING - TEST METHODS FOR SURFACE-MOUNT BOARDS OF AREA ARRAY TYPE PACKAGES FBGA, BGA, FLGA, LGA, SON AND QFN
    I.S. EN 60191-6-19:2010 MECHANICAL STANDARDIZATION OF SEMICONDUCTOR DEVICES - PART 6-19: MEASUREMENT METHODS OF THE PACKAGE WARPAGE AT ELEVATED TEMPERATURE AND THE MAXIMUM PERMISSIBLE WARPAGE
    NBR IEC 60749-30 : 2011 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 30: PRECONDITIONING OF NON-HERMETIC SURFACE MOUNT DEVICES PRIOR TO RELIABILITY TESTING
    04/30119207 DC : DRAFT AUG 2004 IEC 60747-20-1 - SEMICONDUCTOR DEVICES - PART 20-1: HANDLING, PACKING, LABELLING, SHIPPING AND USE OF MOISTURE REFLOW SENSITIVE SURFACE MOUNT DEVICES
    IEC 60749-6:2017 Semiconductor devices - Mechanical and climatic test methods - Part 6: Storage at high temperature
    I.S. EN 60749-42:2014 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 42: TEMPERATURE AND HUMIDITY STORAGE
    I.S. EN 60068-3-13:2016 ENVIRONMENTAL TESTING - PART 3-13: SUPPORTING DOCUMENTATION AND GUIDANCE ON TEST T - SOLDERING
    IEC 60747-5-6:2016 Semiconductor devices - Part 5-6: Optoelectronic devices - Light emitting diodes
    IEC 60068-2-58:2015+AMD1:2017 CSV Environmental testing - Part 2-58: Tests - Test Td: Test methods for solderability, resistance to dissolution of metallization and to soldering heat of surface mounting devices (SMD)
    I.S. EN 60068-2-58:2015 ENVIRONMENTAL TESTING - PART 2-58: TESTS - TEST TD: TEST METHODS FOR SOLDERABILITY, RESISTANCE TO DISSOLUTION OF METALLIZATION AND TO SOLDERING HEAT OF SURFACE MOUNTING DEVICES (SMD)
    EN 61760-4:2015/A1:2018 SURFACE MOUNTING TECHNOLOGY - PART 4: CLASSIFICATION, PACKAGING, LABELLING AND HANDLING OF MOISTURE SENSITIVE DEVICES (IEC 61760-4:2015/A1:2018)
    IEC 60749-20-1:2009 Semiconductor devices - Mechanical and climatic test methods - Part 20-1: Handling, packing, labelling and shipping of surface-mount devices sensitive to the combined effect of moisture and soldering heat
    IEC 62137:2004 Environmental and endurance testing - Test methods for surface-mount boards of area array type packages FBGA, BGA, FLGA, LGA, SON and QFN
    IEC 60749-30:2005+AMD1:2011 CSV Semiconductor devices - Mechanical and climatic test methods - Part 30: Preconditioning of non-hermetic surface mount devices prior to reliability testing
    IEC 60749-35:2006 Semiconductor devices - Mechanical and climatic test methods - Part 35: Acoustic microscopy for plastic encapsulated electronic components
    UNE-EN 60749-30:2005 Semiconductor devices - Mechanical and climatic test methods -- Part 30: Preconditioning of non-hermetic surface mount devices prior to reliability testing
    IEC 60749-21:2011 Semiconductor devices - Mechanical and climatic test methods - Part 21: Solderability
    IEC 60749-42:2014 Semiconductor devices - Mechanical and climatic test methods - Part 42: Temperature and humidity storage
    IEC 60068-3-13:2016 Environmental testing - Part 3-13: Supporting documentation and guidance on Test T - Soldering
    IEC 60749-37:2008 Semiconductor devices - Mechanical and climatic test methods - Part 37: Board level drop test method using an accelerometer
    IEC 61760-3:2010 Surface mounting technology - Part 3: Standard method for the specification of components for through hole reflow (THR) soldering
    PD IEC/TS 62686-1:2015 (published 2015-04) Process management for avionics. Electronic components for aerospace, defence and high performance (ADHP) applications General requirements for high reliability integrated circuits and discrete semiconductors
    IEC 60191-6-19:2010 Mechanical standardization of semiconductor devices - Part 6-19: Measurement methods of the package warpage at elevated temperature and the maximum permissible warpage
    IEC 62137-4:2014 Electronics assembly technology - Part 4: Endurance test methods for solder joint of area array type package surface mount devices
    EN 60749-30 : 2005 AMD 1 2011 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 30: PRECONDITIONING OF NON-HERMETIC SURFACE MOUNT DEVICES PRIOR TO RELIABILITY TESTING
    EN 61760-3 : 2010 SURFACE MOUNTING TECHNOLOGY - PART 3: STANDARD METHOD FOR THE SPECIFICATION OF COMPONENTS FOR THROUGH HOLE REFLOW (THR) SOLDERING
    EN 60749-20-1 : 2009 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 20-1: HANDLING, PACKING, LABELLING AND SHIPPING OF SURFACE-MOUNT DEVICES SENSITIVE TO THE COMBINED EFFECT OF MOISTURE AND SOLDERING HEAT
    EN 60749-21:2011 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 21: SOLDERABILITY
    EN 60068-3-13 : 2016 ENVIRONMENTAL TESTING - PART 3-13: SUPPORTING DOCUMENTATION AND GUIDANCE ON TEST T - SOLDERING
    EN 60749-42 : 2014 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 42: TEMPERATURE AND HUMIDITY STORAGE (IEC 60749-42:2014)
    EN 62137:2004/corrigendum:2005 ENVIRONMENTAL AND ENDURANCE TESTING - TEST METHODS FOR SURFACE-MOUNT BOARDS OF AREA ARRAY TYPE PACKAGES FBGA, BGA, FLGA, LGA, SON AND QFN
    NF EN 60749-30 : 2005 AMD 1 2011 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 30: PRECONDITIONING OF NON-HERMETIC SURFACE MOUNT DEVICES PRIOR TO RELIABILITY TESTING
    EN 60749-37:2008 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 37: BOARD LEVEL DROP TEST METHOD USING AN ACCELEROMETER
    EN 60191-6-19 : 2010 MECHANICAL STANDARDIZATION OF SEMICONDUCTOR DEVICES - PART 6-19: MEASUREMENT METHODS OF THE PACKAGE WARPAGE AT ELEVATED TEMPERATURE AND THE MAXIMUM PERMISSIBLE WARPAGE
    EN 62137-4:2014/AC:2015 ELECTRONICS ASSEMBLY TECHNOLOGY - PART 4: ENDURANCE TEST METHODS FOR SOLDER JOINT OF AREA ARRAY TYPE PACKAGE SURFACE MOUNT DEVICES (IEC 62137-4:2014)
    EN 60068-2-58:2015/A1:2018 ENVIRONMENTAL TESTING - PART 2-58: TESTS - TEST TD: TEST METHODS FOR SOLDERABILITY, RESISTANCE TO DISSOLUTION OF METALLIZATION AND TO SOLDERING HEAT OF SURFACE MOUNTING DEVICES (SMD) (IEC 60068-2-58:2015/A1:2017)
    EN 60749-35 : 2006 SEMICONDUCTOR DEVICES - MECHANICAL AND CLIMATIC TEST METHODS - PART 35: ACOUSTIC MICROSCOPY FOR PLASTIC ENCAPSULATED ELECTRONIC COMPONENTS

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 60068-2-20:2008 Environmental testing - Part 2-20: Tests - Test T: Test methods for solderability and resistance to soldering heat of devices with leads
    IEC 60749-35:2006 Semiconductor devices - Mechanical and climatic test methods - Part 35: Acoustic microscopy for plastic encapsulated electronic components
    IEC 60749-3:2017 Semiconductor devices - Mechanical and climatic test methods - Part 3: External visual examination
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