Layout ChecklistShax Engineering
Layout Check list
- Schematics shall be completed and free of errors. The NETLIST shall be reviewed and free of errors.
- Provide the NETLIST or the schematic in ORCAD.
- Specify any special design rules or restrictions.
- Provide a soft or hardcopy or a URL of all design parts data sheets.
- Specify trace width and stack up preference.
- All parts shall be shown and clearly identified on schematic.
- Parts shall be labeled with reference designators.
- Pins shall be identified and numbered.
- Grounds shall be identified and clearly separated.
- Powers shall be identified and clearly separated.
- Polarized Capacitors shall be identified and marked with + sign.
- Special traces for high current or high frequency or differential traces shall be identified and marked.
Bill of Material
- List reference designator, manufacturer and part number.
- Identify and define the package style.
- Define board dimensions, thickness and mounting holes sizes and locations.
- Define the restricted areas where no components or traces are allowed.
- Define critical parts’ locations such as interface connectors and jacks.
- Define mounting holes, power, RF and other interface connectors.
- Show critical component heights or any heat sink requirements.
- Specify if panelization is required.
- Provide floor plan or sketch for the placement plan.
- Locate critical parts that are close to each other.
- Define power supply best location on the board.
- Special traces for high current or high frequency or differential traces shall be identified and marked. High speed traces are traces carried 600 MHZ or above.
- Identify and define power conductor width for power and ground signals.
- Identify and define the trace width, spacing and the value for impedance control signals.
- If possible, define layers stack-up.
- Identify all differential pair traces and matched length.
- Define routing technology, trace width and spacing.
- Does any signal requires ground shielding?
- Is the board going to be ICT tested? What are the test points required?
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