Have you ever designed a printed circuit board but received the feedback that this cannot be made unless there would be a change performed? Or maybe you designed a complex PCB board and sent it to the factory only to find out that the manufacturer did not manufacture them according to your requirements? The technical possibilities of IPC PCB manufacturers are becoming more and more complex and the product life cycle is expected to be longer and longer.
As a designer, you have to think about more than just about today the software you are using. To ensure that your design is stable, you must know how to manufacture (DFM), for the environment (DFE), for Reliability (DFR), designed for testing (DFT) and so on. Consider all of this pulling also means that we are above expectations and, in some cases, have to be clear about the correct name.
Guided by the IPC standards
The IPC, the Association Connecting Electronics Industries, was founded to support designers, manufacturers and end customers with the same goal to work towards. After its inception in 1957, IPC standards were introduced Installation and manufacturing requirements for electronic devices and assemblies standardize. Thanks to these IPC standards, PCB designers can create robust IPC PCB design that serves your benefit and reduce time to market. In addition, you can also trust that your circuit boards will work reliably, as soon as the end product is used in practice.
But are such standards really that important? The answer is yes. If there are no PCB standards to measure the quality of our PCB manufacturing, we would meet the situation below:
• We would not always get a product that met our expectations corresponds
• We would take the risk that the same aspect is different is interpreted
• We would not be able to ensure the right quality level
• We would not be able to compare similar products or factories
• A guaranteed time to market would be built on chance and not on a good factory selection and good design
Whether IPC standards are effective
Now that we agree that we need standards, the question arises whether IPC standards are effective. As a matter of fact! With the introduction of IPC standards, designers, manufacturers, and end customers benefit from the advantages listed below.
An important aspect to consider is that IPC standards, as minimum scale, designers and manufacturers help to save time and before the PCB boards were manufactured during the PCB manufacturing process and after that end product was loaded, which results in cost savings.
There are a variety of documents within the IPC standard. If those are used together, they should get the manufacturer and the customer to agree on quality and acceptance. These documents also allow customers and manufacturers to share set acceptance criteria for products that use newer technologies. So if you are reading this now and wondering how best to start with it to understand standards and acceptances, there are many sources that will help you to start with it. The IPC website will help you find out more about the organization itself and how to become a member. Also, MOKO Technology offers various sources to help you with your “IPC journey”. Our technicians will help you learn which IPC standards you are considering should pull, depending on your device. We also have certified IPC trainers who teach your engineers the acceptance criteria of printed circuit boards can. Last but not least, you can use for the production of your next PCB work together. We have over 120 million based Printed circuit boards that we ship annually, seven steps in our PCB manufacturing process worked out in which we are even stricter than that Specifications of the IPC are.
What can go wrong with IPC PCB standards?
If we take a look at what could be causing a defective product specification to fail, there are a few things to consider.
• The processed material can suffer from poor reliability. The cost of making a standard PCB can be higher than intended or consecutive manufactures of the same design can be contradictory.
• It is very important to refer to relevant industry specifications, such as that of the IPC.
• It is also critical that designs have a complete and precise specification involve no interpretations, and that an appropriate baseline is set to ensure that customers and suppliers are both the same opinion.
A common example: Copper foil thickness
An example: A production drawing for a 6-layer IPC PCB design has one for all layers copper requirement of 2 oz (2oz = 70µm). No further information for the copper thickness Listed in detail or referred to as external specifications.
These manufacturing data are made to three different manufacturers passed on and some of the supplied circuit boards show failures after the assembly. During the cause analysis for the failures, it is found that there is a deviation in the copper thickness. A possible cause for this could be that in the manufacturing data not on the table of IPC PCB copper thickness for inner and outer copper layers were referenced, which made the manufacturer’s requirements different have interpreted. Theoretically, this could be an outer layer copper thickness between 47.9µm and 78.7µm result, depending on what the manufacturing operation is under 2 oz of copper processing.
General specifications, like that of the IPC, should be kept as a minimum in manufacturing data that can be used to enable a uniform baseline for production.
We also recommend creating a general specification to strengthen basic requirements. In addition to that, the only way to ensure that your printed circuit boards are consistently manufactured correctly, that you meet the standards of your IPC PCB manufacturer.
If you move parts to a new manufacturer, you will have a reliable one specification help to ensure that the PCBs received match the match what you received until the end.
MOKO Technology’s PCB specification
Our decades of experience in the PCB industry has taught us that unit costs are not the only issue. The longevity and reliability of the end product must be considered. At MOKO Technology, we try to find ways to provide circuit boards with an additional benefit while we still keep cost impact to a minimum.
While IPC standards can be seen as a reliable foundation, our specifications impose requirements that in some cases even exceed meet the requirements of the IPC. Still, we manage to do this in a way that gives the product additional protective layers. We consider this as the lowest total cost. One IPC PCB standard that we suggest is that all holes meet requirements of the IPC 6012 class 3. This applies to all printed circuit boards, even if it is not a product from the medical technology sector. The PCB boards are damaged with a very strong foundation. If the PCB goes through the heat cycle, it will strive to expand in the Z-axis direction. A badly coppered hole will almost certainly do that the weak link that will cause the failure of the circuit board.
In our IPC PCB specification, we refer to 14 of the most important features for durable circuit boards. In this film, we’re talking about feature # 2 – none connection welding or repair of short-circuited conductor tracks.
Another standard that we highlight is no joint welding or repair of short-circuit tracks. We have found that a repaired conductor track almost always affects the finished product; be it on the
required impedance or, in some cases, the general reliability of the repaired trace. If the repair is done on an inner layer, it is not visible, but it will nevertheless have an impact on the final product. We also have other requirements, such as a special one minimum for the thickness of the solder resists and cleanliness requirements above those of the IPC. We have tolerances for profiles, holes and other mechanical properties defined, all related to the reliability and durability of the end product contribute. These points appear all the more important against the background that the lifetime of the final product depends on you.
Why it is important to check performance and quality design and manufacture a circuit board at the lowest total cost does not automatically mean a focus on the price. A product that according to specifications from an experienced IPC PCB manufacturer with an established and tested set of standards is ultimately foreseen survive life cycle.
Reinforce the different standards for printed circuit boards
The most effective way to reinforce the different standards for printed circuit boards is to test the performance and quality of the end product.
This can be done by cross-sectional tests as well as by detailed tests of chemical components that can be seen on the printed circuit boards after manufacture, respectively. MOKO Technology gathers performance data from all of its manufacturing operations around the key performance indicators (KPIs) of the main processes within the facilities even further analysis. With this data, changes can be made to ensure the reliability of all products in the subsequent cycles. That is also the one reason why all of our products go through several times during the manufacturing process 100% electrically tested. This guarantees that defects in the PCB manufacturing process can be recognized at one of the control points.
We also have a subordinate inspection team in the factories to ensure that the product matches the order data. These additional requirements are part of our general standards that apply to all printed circuit boards that must exist before they are delivered to the customer. Our internal requirements help us to do achieve a quality performance target of 99.3%. The quality of the finished circuit board is one of the best indicators to review the standards for each step
Quality and reliability are essential to keep up with the market critical aspects of a company’s profitability and reputation. The introduction of standards within the manufacturing process can help get a better one efficiency, longer product life and compliance with ensuring regulations. Standards also allow electronic assemblies to manufacture some stringent quality tests, and they can be both costly to reduce delays as well as any rework or potential rejects.
Quickly process any electronic product in the universe on a printed circuit board. For many years, the IPC-A-600 “Acceptance of printed circuit boards” and IPC-6012 “Qualification and performance specification for rigid printed circuit boards” standards set the standard for printed circuit board processing quality, and pass acceptance criteria with color images and photographs showing all types of PCB surfaces and inner state indicate. The IPC-A-600 is the IPC-A-600 one of the most confirmed documents.
IPC PCB standard: IPC-A-600
PCB manufacturers working through acceptance standards are bound to find errors in the manufacturing process. The IPC-A-600 training and certification program has a different connection between the IPC-A-600 and IPC-6012. This program clearly shows circuit board users that the company is of respectable quality improvement. From the industrial administration, those involved for everyone and the PCB manufacturing, which are still not available today.
Electronic assembly company Nobody let the components for a defective PCB fix it. The IPC-A-600 treatment and instruction North Monte information on better entrance inspection. Having concerns about acceptable conditions saves you from having to throw away PCBs; Concerns about faulty conditions save the technician the costly assembly of the components. Certified IPC trainers who are approved in the electronics industry can help them be more productive with their PCB suppliers.
Advantages of IPC PCB certification
Those interested in a quality assurance initiative in their company have an industry-developed and approved IPC-sponsored program that helps them meet their commitment to continuously improve processes and brands. IPC recognition clearly shows customers that your company takes IPC-A-600 seriously.
All IPC-A-600 Certified IPC PCB Trainers receive training materials and are responsible for training application specialists. This includes:
• A guide for the instructor to lead the training for user specialists
• A circuit board model that demonstrates external characteristics such as track width and spacing, solder ring and solder mask
• The IPC-A-600 “Acceptability of Printed Boards” and IPC-6012 “Qualification and Performance Specification for Rigid Printed Boards” standards
• Exams with and without books for the IPC-A-600 training for application specialists
• A student handbook for the training parts taking place in the classroom
• IPC certificate for completion of the training
• Training materials for application specialists, including student manuals and certificates, can only be purchased from IPC through certified IPC Trainers and the companies they represent. •Certified IPC trainers can freely choose the training locations and, if necessary, charge training fees.
• Recertification training can be conducted at an authorized certification center.
Topics in the IPC-A-600 training for certified IPC PCB trainers:
• Product classifications and acceptance criteria for printed circuit boards
• Surface and subsurface conditions of the base materials, e.g. Stains/cracks
• Cover the conductor tracks with solder mask and positional accuracy to the solder eyes
• Requirements regarding track width and spacing and solder ring
• Dielectric material criteria for back etching, cavities, and resin withdrawal
• Requirements for plated-through holes with regard to the thickness of the copper plates, cavities, nodules and crevices
• Acceptance criteria for flexible, rigid-flexible and printed circuit boards with a metal core
• Abilities to inform the curriculum effectively
For more information on the PCB standards on your PCB manufacturing, you can contact us directly!