A fabrication drawing is to let the manufacturer exactly what quality and specification requirements are needed to create the boards precisely as envisioned by the engineer. A fabrication drawing allows engineers to customize beyond the simple dimensions and layout of their board designs.
What Should a Fabrication Drawing Contain
The main items included on a fabrication drawing are specifications and tolerances. Specifications include any information that is not readily available from the Gerber data. Tolerances are any requirements that could differ from the manufacturer’s standard tolerances or what is established as the minimum quality tolerances. Most often, the typical tolerances are standard practice; so, if there are requirements that differ from the standard tolerances, it’s important to make sure it is noted during the quoting process (tighter tolerances may increase costs, as the manufacturer considers risk associated with lower yields).
Key Notes
Below are the key notes that should be on a fabrication drawing:
Dimensions
Special fabrication notes (cut-outs, unusual shapes, etc.)
View of board – Component or Solder Side
Layer stack-up
Board thickness and tolerance
Finish (including thickness for hard gold, soft gold, and gold fingers)
Solder mask requirements, colour, type
Hole chart with tolerances
Part number details with revision #
IPC class or other quality standards
Copper thickness & Plating
Tolerances of conductor widths
Material specifications and dielectric thicknesses
Detail blown up if needed
Markings on the board
Bow and twist tolerances
Silkscreen, colour, type, tolerances
Electrical test tolerances and standards to be used
What`s needed on a Fabrication Drawing
Importance of a Fabrication Drawing
A fabrication drawing is to let the manufacturer exactly what quality and specification requirements are needed to create the boards precisely as envisioned by the engineer. A fabrication drawing allows engineers to customize beyond the simple dimensions and layout of their board designs.
What Should a Fabrication Drawing Contain
The main items included on a fabrication drawing are specifications and tolerances. Specifications include any information that is not readily available from the Gerber data. Tolerances are any requirements that could differ from the manufacturer’s standard tolerances or what is established as the minimum quality tolerances. Most often, the typical tolerances are standard practice; so, if there are requirements that differ from the standard tolerances, it’s important to make sure it is noted during the quoting process (tighter tolerances may increase costs, as the manufacturer considers risk associated with lower yields).
Key Notes
Below are the key notes that should be on a fabrication drawing:
Archives
Categories
Archives
Recent Posts
What`s needed on a Fabrication Drawing
19/08/2021What track width do you require for your next design
18/08/2021The benefits of working with a PCB Design Service
18/08/2021Categories
Meta
Categories