Free Trials

Download a free trial to find out which Altium software best suits your needs

How to Buy

Contact your local sales office to get started on improving your design environment

Downloads

Download the latest in PCB design and EDA software

  • PCB DESIGN SOFTWARE
  • Altium Designer

    Complete Environment for Schematic + Layout

  • CircuitStudio

    Entry Level, Professional PCB Design Tool

  • CircuitMaker

    Community Based PCB Design Tool

  • NEXUS

    Agile PCB Design For Teams

  • CLOUD PLATFORM
  • Altium 365

    Connecting PCB Design to the Manufacturing Floor

  • COMPONENT MANAGEMENT
  • Altium Concord Pro

    Complete Solution for Library Management

  • Octopart

    Extensive, Easy-to-Use Component Database

  • PRODUCT EXTENSIONS
  • PDN Analyzer

    Natural and Effortless Power Distribution Network Analysis

  • See All Extensions
  • EMBEDDED
  • TASKING

    World-Renowned Technology for Embedded Systems Development

  • TRAININGS
  • Live Courses

    Learn best practices with instructional training available worldwide

  • On-Demand Courses

    Gain comprehensive knowledge without leaving your home or office

  • ONLINE VIEWER
  • Altium 365 Viewer

    View & Share electronic designs in your browser

  • Altium Designer 20

    The most powerful, modern and easy-to-use PCB design tool for professional use

    ALTIUMLIVE

    Annual PCB Design Summit

    • Forum

      Where Altium users and enthusiasts can interact with each other

    • Blog

      Our blog about things that interest us and hopefully you too

    • Ideas

      Submit ideas and vote for new features you want in Altium tools

    • Bug Crunch

      Help make the software better by submitting bugs and voting on what's important

    • Wall

      A stream of events on AltiumLive you follow by participating in or subscribing to

    • Beta Program

      Information about participating in our Beta program and getting early access to Altium tools

    All Resources

    Explore the latest content from blog posts to social media and technical white papers gathered together for your convenience

    Downloads

    Take a look at what download options are available to best suit your needs

    How to Buy

    Contact your local sales office to get started improving your design environment

    • Documentation

      The documentation area is where you can find extensive, versioned information about our software online, for free.

    • Training & Events

      View the schedule and register for training events all around the world and online

    • Design Content

      Browse our vast library of free design content including components, templates and reference designs

    • Webinars

      Attend a live webinar online or get instant access to our on demand series of webinars

    • Support

      Get your questions answered with our variety of direct support and self-service options

    • Technical Papers

      Stay up to date with the latest technology and industry trends with our complete collection of technical white papers.

    • Video Library

      Quick and to-the-point video tutorials to get you started with Altium Designer

    Key Documents for Fabrication and Assembly

    John Watson
    |  June 5, 2019

    I come from humble beginnings - a long line of farmers in central Pennsylvania. It is amazing how one can take a simple seed, place it in the ground, and tend to it. Before long, you have a mature plant with a variety of uses: food for people, feed for livestock, and most importantly, more seeds for the next growing season.

    With so much riding on the seed, it is no wonder why you want to guard and protect it.

    Your PCB Designs are like that simple seed. We plant initial sensitive data that go into them. After tending to them through the design process, they become our mature plant, our final PCB design wed for fabrication or assembly.  In a way, I am as amazed by that process as I was standing in a field of corn. How is that the underlying complexity is even possible in the first place?

    The data we use throughout the process depends on the specific roles we have for the design. We see this whole thing differently when everyone works in their respective roles together. PCB Design is layered with complex processes, and we cannot talk about sensitive data without bringing in those roles.

    Initial Data and the PCB Design Development

    The lifeblood of every PCB design is the electronic component. Everything starts and ends from there.

    At one time, because electronic systems were not as complicated as they are today, components were much more straightforward. They consisted of a schematic symbol, a footprint, and a few basic parameters. A common practice was to copy a component throughout the design with different values. Over time, more complex components became necessary with much more information and details to support cutting-edge systems.

    At a minimum, we should include the following information with every component: schematic symbol, footprint (Decal), 3D Model, circuit simulation (Optional), parametric information, sourcing and supporting documents.

    At this point, there are three roles: the Electronic Engineer, Librarian, and the PCB Designer. As we see in the chart below, a specific role uses data. Of course, I am aware that these are not absolute and there may be some crossover.

    Throughout this design process, you use specific data at certain points. For example, the EE uses parametric information to pick the design’s primary component. The selected component goes over to the Librarian to build the necessary part. The PCB designer uses the component in a schematic pushing it over to the PCB layout.

    At critical points in the design, I make sure to bring several other people to the party. They include the Mechanical Engineer (ME), Purchasing and Quality. They use specific data to fulfill their roles. Our chart is growing, but these individuals are a little more specific about the data they want.

    PCB Output Data

    We can now look at the output data of our PCB Design. Probably more importantly and, I might add, nerve-racking, we are ready to build our output data packages.

    Yes, you read that right package(S). There are two data packages. Our first package is the Fabrication package which includes the required data needed to fabricate the board. Secondly, the Assembly Data package (as you guessed) is for the assembly of the PCBs. Just a word about data security, understand these two data packages ultimately have all the necessary information to build a PCB design. As a common practice, we have two data packages so we can send them to multiple vendors. No single vendor (of course unless you fully trust them) gets both packages. The one document that never goes out under any condition is the schematic. With that, anyone can copy your design.

    Knowing the specific needs of your fabrication and Assembly comes in handy. The industry is ever-changing, and there are multiple output data formats available. It is more comfortable when you know which is the best to use. What is offered here is typical, but your mileage may vary, as they say. Much can be said regarding each item. Each of them has a purpose.

    Fabrication Drawing

    This detailed drawing should include the critical items your Fabrication house needs including drill dimension, drawing of the board, Drill chart, Layer Stackup, special fabrication needs such as transmission line tables (used for controlled impedance lines), and detailed fabrication notes. Keep in mind, this is just a guideline. If you do not include specific details in the document, they will not happen.

    Assembly Data

    The Assembly Drawing guides the assembly house. On this document, you should overstate things rather than understate them. Not giving specific requirements will most likely delay the build. Provide accurate information primarily for the BOM. Errors at this point compound significantly.

    Conclusion

    Every piece of data in the PCB design process has its place and purpose. If you know why and what they are, your team, fabrication, and Assembly house will thank you. They are the seeds we plant to bring about some amazing things, but only when we know how to use them and, more importantly, why.  

    Learn how to shift strategies and accommodate PCB data management processes to fit market demands. Would you like to find out more about how Altium can help you with your next PCB design? Talk to an expert at Altium.

     

     

    About Author

    About Author

    With nearly 40 years in the Electronic industry with 20 of them being in the field of PCB Design and engineering, John has stayed on the cutting edge of the PCB industry as a designer/Engineer and more recently as a trainer and mentor. His primary work has been in the Manufacturing field but it has also expanded to several PCB Service arenas. As a veteran, he proudly served in the Army in the Military Intelligence field. John is a CID Certified PCB designer. Presently pursuing his Advance CID certification. Now as the Senior PCB engineer at Legrand Inc, he leads the PCB Designers and Engineers in various divisions across the United States and China.

    most recent articles

    Back to Home