/What is the IPC-A-610 acceptance standard for electronic assemblies?
A very strange phenomenon has recently been discovered. Many companies are currently consulting with PCBA to manufacture this piece, some are very professional and some do not understand. It is equivalent to the South Pole and the North Pole. I roughly analyzed what might be because the current situation is unclear. Some purchases that do not understand some are not cost-effective, and the boss sent them away on the plane. Because of this kind of colleague, you said that he understood him but not very well, and then the salary was not low. Now that there are not many orders, it is better to recruit a cheaper white. Or you are the boss and the purchaser, and you will not be hungry if you feed yourself. Do you think my analysis is correct?
A little bit off topic, recently a customer asked me a question. He asked me: “You are doing PCB manufacturing and assembly here, right? Then your process specifications include whether there are specific standards for welding for our acceptance, otherwise what should we do if we give us unqualified products.” In fact, quality The required SMT processing plants will have a set of their own factory operating specifications and acceptance standards that have been drawn up according to the electronic assembly acceptance standard IPC-A-610. Without these standards, you may not be able to pass ISO9000, and even FASTPCBA’s ISO13485 medical electronic qualification and IATF16949 automotive electronic qualification certification are more strict than these. Since there is a customer to ask, then we will share with you today: What is the IPC-A-610E acceptance standard for electronic assemblies?
IPC-A-610 is the “Standards for the Acceptance of Appearance Quality of Electronic Assemblies” formulated by the American Electronic Assembly Association. In early 2010, IPC-A-610E “Acceptability of Electronic Components” and J-STD-001E “Welding” were launched. Material and process specifications.
IPC-A-610 is an internationally recognized quality inspection standard generally accepted by the electronics manufacturing industry internationally. There are many contents of this standard, here is a brief introduction to IPC-A-610 overview and IPC-A-610E introduction. 1. Overview of IPC-A-610
The IPC-A-610 standard first classifies electronic products into 3 levels according to the reliability requirements and use conditions of electronic products
In addition, all levels of products are divided into 4 levels of acceptance conditions, and each level of acceptance conditions is divided into 3 levels (1, 2, 3). Therefore, different grades of electronic products should be tested with different grade standards.
1. 3 levels of electronic products
①Class-level general electronic products include consumer electronic products that do not have high requirements on appearance and mainly use functional requirements.
②Classes are dedicated service electronic products, including communication equipment, complex business machines, and high-performance and long-life instruments. This type of product requires a long life, but does not require uninterrupted work, and defects in appearance are also allowed.
③ Grade is high-performance electronic products, including equipment and products that continue to operate or operate strictly in accordance with the instructions. There can be no interruption in the use of such products, such as medical lifesaving, flight control, precision measuring instruments, and high-reliability products in harsh environments.
2. Level 4 acceptance conditions for all levels of products, each level of acceptance conditions is divided into 3 levels (1, 2, 3)
① Grade: The target conditions refer to near perfect or optimal conditions. This is a condition that we hope to achieve but not always meet.
②Class: Acceptable conditions one by one means that the assembly can guarantee completeness and reliability under the operating environment, but it is not perfect.
③Level: The defect conditions refer to the integrity, installation or function of the assembly may not meet the requirements. Such products can be rooted
According to the design, service, and user requirements, rework, repair, scrap, or “handling according to regulations”, of which “handling according to regulations” must be approved by the user.
④Level: Process warning conditions-refers to a situation that does not affect the integrity, installation and function of the product, but there are conditions that do not meet the requirements (non-rejection). This is caused by materials, design, operation, equipment, process parameters, etc. It requires manufacturers to master the control requirements of the existing process and take effective improvement measures.
3. The purpose of IPC-A-610
The purpose of IPC-A-610. It is to help manufacturers achieve the highest SMT production quality.
IPC-A-610 stipulates how to assemble the components on the PCB qualified, for each type (level) of the standard provides measurable component location and solder joint size, and provides the appearance after reflow soldering The picture, for example, shows the key dimensional parameters of the solder joint, and Table 16-2 lists the corresponding technical parameters of the QFP solder joint. When testing. For any parameter of each type of solder joint, the measurable technical parameter index of the phase can be found from the table. In addition, you can also refer to the comparison of appearance pictures after reflow soldering. For example: Figure 16-16 is the SOP solder joint height inspection standard: (a) is acceptable level 2, (b) is acceptable level 3. Similarly, the width and length of solder joints are defined in detail, so it is very intuitive and convenient. And the number of each parameter is very specific.
2. Introduction to IPC-A-610E
IPC-A-610E is the acceptance standard for lead-free soldered electronic assemblies, revised on the basis of D version.
IPC-A-610E is used in conjunction with J-STD-00E “Welding Materials and Process Specifications” to form a perfect complement.
1. IPC-A-610E revision changes
① Newly added flexible circuit damage judgment standards, including flexible reinforced boards, welding between flexible boards, connecting flexible boards to PCBs, etc.
② Added SMT lead damage requirements.
③ Separate the damage requirements of components from the installation requirements. The expansion well in Chapter 9 of the standard unifies the damage requirements of all components.
④The installation requirements of through holes and SMT connectors have been newly added.
⑤The installation requirements of riveted terminal are newly added.
① Expanded the requirements for crimping pins.
⑦ For lead-free through-hole terminals, the requirements for thermal cracking and filling warping were revised.
⑤ Added sub-board requirements
With the continuous progress and innovation of this technology of electronic assemblies, the latest version has reached IPC-A-610G, and we believe that more standards will come out, and we sincerely hope that our own standards can be earlier Is accepted internationally and is no longer in a passive situation because of the issue of standards.
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