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PCB fabrication notes are enclosed within the fabrication drawing by a designer. Fabrication drawing is a blueprint for circuit board manufacturing that includes graphical representations. It comprises the board shape with dimensions, location of the drilled holes (drill chart), details of cut-outs, layer stack-up, title block, and the fab notes.

pcb-fab-drawing-in-kicad.jpg
PCB fab drawing in KiCad

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PCB fabrication notes include manufacturing instructions, assembly details, industry specifications, and standards along with the locations of special features. It also includes manufacturing standards, details of impedance traces, solder mask color, silkscreen information, and manufacturing tolerances. Sometimes, a list of components is also added upon the fabricator’s request.

fab-notes-in-kicad-fab-drawing.jpg
PCB fabrication notes in KiCad fab drawing

To manufacture the desired board perfectly, fabricators need to understand the designer/customer’s specifications and requirements. Hence, fab notes are a standard requirement in the industry.

Fab notes include board data files such as Gerber and drill files in the form of text or pdf. They are used to clearly communicate the designer’s requirements to the vendor.

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Fab notes should contain the following details:

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Some basic guidelines for creating PCB fabrication notes are mentioned below:

  • Notes are required to be clear and concise.
  • Repetitive notes or values that may contradict each other are not permitted.
  • Values defined in the notes should be within the manufacturer’s capabilities.
  • The provided notes should be in the order in which the manufacturing processes are carried out. This will serve as a checklist for the fabricator.
  • Notes should be comprehensive so that the cost and turnaround time is minimal.

Fab notes serve as a communication channel between the PCB designer and the manufacturer, relaying important information about production processes and board features.

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Sierra Circuits is
headquartered in Silicon Valley.
We welcome visitors at
our 70,000 sqft facility,
located at 1108 West Evelyn Avenue
in Sunnyvale, California.
Book a tour with an account manager today!
Let us introduce you to one of the most innovative communities of engineers and designers in the world.
We can help you plan your project from design to assembled board.

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Our 70,000 sqft state-of-the-art campus in the heart of Silicon Valley contains the most advanced equipment required for the manufacture and assembly of your PCBs. Whether you’re looking for standard quick turn PCBs or boards with the tightest tolerances, made from exotic metals, there’s a reason Sierra Circuits leads the industry in quality and performance.

PCBs manufactured and assembled in the United States

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Sierra Circuits can manufacture your PCB and have it expedited to you within 24 hours.

Full turnkey boards, with assembly and components in as fast as 5 days.


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Call us: +1 (800) 763-7503
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