ASM-SMT-Technical Conditions of Order and Deliveries (TCOD) - 第22页
22 www.asm-smt.com 9.2. Electrical / electro nic assemblie s (printed circuit boa rds) 9.2.1. A pplic able regulations, guidelines and standards The standards listed below shall be applied in their latest version. Genera…
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DIN EN ISO 3834 -4 Quality requirements for fusion welding of metallic materials - Part 4: Elementary
quality requirements
DIN EN ISO 2553 Welding and allied processes - Symbolic representation on drawings - Welded joints
DIN EN ISO 9013 Welding and related processes – Classification of qualities and dimensional
tolerances for flame-cutting surfaces
DIN EN ISO 9013-5 Thermal cutting – Classification of thermal cuts
DIN EN ISO 13920 General tolerances for welded constructions – Dimensions for lengths and angles –
Shape and position
DIN EN ISO 10042 Welding - Arc-welded joints in aluminum and its alloys - Quality levels for
imperfections
DIN EN ISO 9606-1 Qualification testing of welders - Fusion welding - Part 1: Steels
DIN EN ISO 14731 Welding coordination - Tasks and responsibilities
Welders must have a certificate in accordance with DIN EN ISO 9606-1 The supplier must have or must have
commissioned a welding coordinator in accordance with DIN EN ISO 14731. The supplier must meet the welding
requirements as laid down in DIN EN ISO 3834.
Table 1: Observance of additional requirements
Aspect
Standard
Requirement
Additional
Requirement
Comment
Material
ISO 630-1:2011
Structural steels
S 235 JR G2
Material No. 1.0038
ISO 10474Works test
certificate 2.2
(minimum)
Operational
requirements
DIN EN ISO
3834-3
Part 2 (Comprehensive)
Part 3 (Standard)
Furnish evidence for
welder certificates and
welding supervisors
Indication in
drawings
ISO 2553:2013
(ISO 2 553)
Welding quality
ISO 5817:2014
(ISO 5 817)
Classification group “C”
Undercuts “B”
Excessive throat
thickness “B”
Not permissible:
- Spattering
- Stuck wire ends
- Open irregularities (e.g. pores)
- Open face edges on plate parts
Flame-cutting quality
(autogenous)
DIN EN ISO
9013
Cutting quality II A (or
B)
Validity of tolerances unless otherwise
specified
Flame-cutting quality
(laser)
DIN EN ISO
9013
Validity of tolerances unless otherwise
specified
9.1.10. Castings
Applicable regulations, guidelines and standards:
ISO 4990 Steel castings -- General technical delivery requirements
ISO 16220 Magnesium and magnesium alloys -- Magnesium alloy ingots and castings
ISO 15201 Zinc and zinc alloys -- Castings – Specifications
ISO 8062-2 Castings -- System of dimensional tolerances and machining allowances
ISO 17804:2005 Founding -- Ausferritic spheroidal graphite cast irons -- Classification
ISO 20457 Plastics molded parts -- Tolerances and acceptance conditions
Observance of the above specifications, guidelines and standards is mandatory. All runners must be removed. All cavities
must be free from molding residues.
All castings shall be checked for cavitation and cracking in critical places. Any measures required to ensure the quality of
the series parts shall be defined.
Cavities traceability to be established by vendor.
Any changes to / deviations from these general specifications must be defined and must be released by ASM AS.
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9.2. Electrical / electronic assemblies (printed circuit boards)
9.2.1. Applicable regulations, guidelines and standards
The standards listed below shall be applied in their latest version.
General
IPC-9191 General Guidelines for Implementation of Statistical Process Control (SPC)
EN 61010-1 Safety requirements for electrical equipment for measurement, control and laboratory
use – Part 1: General requirements
Assemblies
ANSI-IPC-A-610 Acceptability of Electronic Assemblies, Class 2 in general, exceptions vide among
chapter 9.2.2
J-STD-001 Requirements for Soldered Electrical and Electronic Assemblies Class 2 in general
IPC-7711/7721 Rework of Electronic Assemblies Class 2 in general
IPC-CC-830 Qualification and Performance of Electrical Insulating Compound for Printed Wiring
Assemblies
Printed Boards
IPC-A-600 Acceptability of Printed Boards, Class 2 in general
IPC-6011 Generic Performance Specification for Printed Boards, Class 2 in general
IPC-6012 Qualification and Performance Specification for Rigid Printed Boards, Class 2 in
general
IPC-6013 Qualification and Performance Specification for Flexible Printed Boards, Class 2 in
general
Design:
IPC-SM-782 Surface Mount Design and Land Pattern Standard, Class 2 in general, End-Use
Application (1.2.1) chapter 5
IPC-2152 Standard for Determining Current-Carrying Capacity in Printed Board Design
UL 94 Test for Flammability of Plastic Materials for Parts in Devices and Appliances
IEC 60825-1 Safety of laser products; part 1: equipment classification, requirements and user’s
guide
Handling:
IEC 61340-5-1 Electrostatics - Part 5-1: Protection of electronic devices from electrostatic
phenomena - General requirements
IEC 61340-5-3 Electrostatics - Part 5-3: Protection of electronic devices from electrostatic
phenomena - Properties and requirements classification for packaging intended for
electrostatic discharge sensitive devices
9.2.2. Requirements
The requirements of the guidelines and standards listed in Subsection 9.2.1 must be met to the extent that they are
applicable.
For reasons of environmental protection, the manufacturing of printed circuit board shall always be based on the “no
clean process”
On printed circuit boards, only display LED`s (e.g. Power ON / OFF etc.) may be used which do not fall in the scope of the
laser protection class according to IEC 60825-1:(2014).
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Electronic assemblies (printed boards) from ASM AS shall meet the requirements of Class 2 products for general
Industrial electronic equipment as defined by ANSI/IPC-A-610 and J-STD-001.
Exceptions from this rule include:
1. Residual wire lengths on the soldering side of printed boards. The maximum permissible cut lead length is 2mm;
more accurate values shall be specified in the documentation of the printed boards.
2. Population with components: ANSI/IPC-A-610, vertical - radial leads
3. Soldered connections: ANSI/IPC-A-610, solder fillet (various chapters)
Items 2. and 3. are subject to the Class 3 requirements for power electronics.
The acceptance at ASM AS occurs according to ANSI/IPC-A-610.
The printed circuit boards used must meet the UL requirements UL 94 V0. The UR logo, the manufacturer’s logo, the
board type and the flame resistance class according to UL 94 shall be etched into the board as part of the layout. The
supplier shall furnish evidence of the manufacturer’s UL approval during the First article testing of the assemblies.
9.2.3. Monitoring of manufacturing processes
For the statistical monitoring of the manufacturing processes, the application of the IPC-9191 “General Guidelines for
Implementation of Statistical Process Control (SPC)” is recommended.
9.2.4. Repair, rework and modification
Employees, who perform repair, rework and modification operations on printed circuit boards must be qualified at the
“Expert” skill level according to IPC-7721. Appropriate training certifications shall be provided. The required level of
conformance is the highest level according to IPC 7711.
9.2.5. Tests on electrical / electronic assemblies (printed boards)
9.2.5.1. Incoming inspections
The purchased components, printed circuit boards and manufacturing equipment must be subjected to a defined quality
test (e.g. solderability test) prior to their use.
9.2.5.2. Intermediate inspections
Suitable quality records and quality metrics must be maintained for each quality-relevant manufacturing step (solder
application, assembly and soldering process). These must record the fault and rework rates as well as the initiated
corrective and preventive measures for each type of assembly.
9.2.5.3. Final inspection and testing
Every printed board shall be subjected to functional testing according to the test instructions. The results shall be
recorded as First Pass Yield.
The contents of the inspection shall be defined in test instructions, usually by the supplier, and released by ASM AS. The
test instructions shall define the test methods, the test attributes, the test equipment, the test markings and the
documentation of results.
The rework / repairs that are performed on failed assemblies shall be recorded and evaluated by fault attributes.
9.2.5.4. First article inspection on electrical / electronic assemblies (printed boards)
Test features:
• Documentation of all set point and actual values from the design specifications of the printed boards
• Use of components according to bill of materials
• Quality of workmanship and soldered joints in compliance with ANSI/IPC-A-610
• Labeling and identification of the printed boards according to requirements and design specifications
• Functional test including test set-up according to test instructions, including a listing of the actual values of the
attributes to be tested
• Preparation and release of work and test plans
• Compliance with the requirements with respect to packaging and the labeling of packaging