DFM the gap between the PCB manufacturing and design solution

    DFM the gap between the PCB manufacturing and design              solution

     Happy Holden and Michael Ford, discusses the design and manufacturing industry to fill the gap between the urgent demand.Michael provided the IPC - 2581 and CFX combination, will no longer exists not for technology to optimize the design of the circuit board manufacturers, as well as the reasons. As Michael said, now is the break barriers, good time to promote the development of DFM and industry to move on.

     Andy Shaughnessy: today we discuss DFM, and how we are going to help designers and those who always get wrong data of CAM engineer. Why DFM looks so reach?

    Michael Ford: there is a big gap between design and manufacturing, mainly for three reasons. First of all, the design and manufacture of distance between geographical position. The location of the products into production and the location of the product design is often far apart. In addition to exist on the space distance, there is also time interval, completion of product design, could take months to put into production. Meanwhile, product designers have begun to other projects.

    But it is also related to the subordinate different technology. When manufacturing problem, practitioners in the field of manufacturing for help they tend to be mentioned from stick machine, reflow soldering furnace temperature curve, and it is difficult to understand these terms for designers.

     Design and manufacture of both sides on the basis of their own experience, technology, and describe the problem, can not be truly effective communication.And because manufacturing is very complex, involving different equipment and materials, so for anyone is very difficult to obtain the comprehensive information success.

    Happy Holden: when I was in to guide the design of PCB layout design engineer (even if they see the same factories produced different multilayer printed circuit board), tell them the most important thing is, "The enormity of the task you face is in the design of PCB at the same time also remember that must go to plan design, use of EDA tools and new components, short rise time, reduce the heat problem. To do this, you can become the world's top PCB designer. I don't want you to be manufacturing experts, the only thing you need to do is visit the PCB production factory, understand the complexity of the whole PCB manufacturing process. Once encountered problems in a timely manner to make email inquiries or visit to factory.

    Designers face a big problem is the lack of a detailed PCB design flow chart. In a node, will encounter serious problems in the component placement and layout, and these different aspects are likely to go wrong. We'll ask CAM from personnel of course of these problems, let them to solve these problems, and according to the PCB cost of products, the answer to standardization. Different choices lead to different cost, cost determines what kind of plan is cheap, what kind of expensive.

  Then we will fill into a table or a checklist, the results for the use of the designer. At least before making a choice they can understand different choices will result in what kind of results. Where I never book, which design course, or which met this kind of information in the IPC standard. If there are countless ways to PCB layout, so how can you choose the best way? If I placed the CPU in a can only three sides wiring not all around the edge of wiring position, there will be what kind of consequences?

    Ford: foreground is very optimistic, because the industry has made good progress recently, some details have been implemented. First of all, the IPC - 2581 standard C version, now called DPMX, forthcoming. C version to add the new module for DFM feedback. A new version of the past that no longer applies based on the rules of DFM, a only from the point of manufacture to join some rules of design rule checking; But the building designers and manufacturers to communicate directly through clear digital methods of a mechanism. Use this mechanism, people no longer need to send a large number of documents and drawings, through phone calls and emails pass information back and forth, the way easy to lose information or misunderstanding, and adopt a pass all information flow channel.

    The second progress is DPMX file (i.e., the IPC - 2581) has now started to used in the manufacture of assembly. Before designing the data mainly flow to the digital manufacturing engineering system, the system will also have a different data needed for each device, and application of local BOM. But if programming involving equipment, equipment will need more product design information. Provided for this purpose, the IPC interconnected factory data exchange (CFX) IIOT data exchange is directly to the function of the machine to send the original IPC - 2581 file, so that the machine directly accurate reference for the design data. Soon after, we can see the most advanced equipment suppliers the real news reports of the technology has been applied.

     Mr Ford: this is the first stage. We hope to see in designer where change is before they deliver the product manufacturing, is no longer in the form of well-defined project to design a product, but can work together with manufacturing, has a continuous flow of information between both sides. Because the manufacturing and design both sides there is always a certain distance, when the material shortage or pricing problem, such as the need from the selected local suppliers call alternative materials, the manufacturer will often use designer without being authorized by using materials or even they didn't foresee the material must be used. All the world DFM design and control rules are not contain unexpected logic.

    So need such a cooperation platform, when meet this kind of circumstance, can make those who look for alternative materials to meet the production requirements of local manufacturers to get the permission of the designer, designer to confirm the function of the replacement material, specification and physical properties (including pin, etc.) in shape and size, welding plate, meet the requirements. This process is not implemented, even if has, is also a process of useless, because wait for manufacturers want to communicate with the designer, designer would have to responsible for other projects.