PCB Design Rules

{
  "vendor": "3rd party fab",
  "vendorSlug": "adom-3rdpartyfab",
  "vendorUrl": null,
  "records": [
    {
      "process": "standard",
      "layerCount": 2,
      "minTraceWidth": {
        "mm": 0.1,
        "mil": 3.94,
        "condition": "1 oz copper"
      },
      "minSpacing": {
        "mm": 0.1,
        "mil": 3.94,
        "condition": "1 oz copper, different nets"
      },
      "minDrill": {
        "mm": 0.15,
        "mil": 5.91
      },
      "minVia": {
        "drillMm": 0.15,
        "drillMil": 5.91,
        "padMm": 0.25,
        "padMil": 9.84
      },
      "annularRing": {
        "viaMm": 0.1,
        "viaMil": 3.94,
        "padMm": 0.18,
        "padMil": 7.09,
        "note": "0.25 mm or above preferred"
      },
      "copperToBoardEdge": {
        "mm": 0.2,
        "mil": 7.87
      },
      "holeToHole": {
        "mm": 0.2,
        "mil": 7.87
      },
      "maskExpansion": {
        "mm": 0.038,
        "mil": 1.5
      },
      "maskSliver": null,
      "silkLineWidth": null,
      "silkToCopper": null,
      "minCopperClearance": {
        "mm": 0.1,
        "mil": 3.94,
        "condition": "different nets"
      },
      "boardThicknessOptionsMm": [
        1.6
      ],
      "copperWeightOptionsOz": [
        1,
        2
      ],
      "surfaceFinishes": [],
      "maxBoardSize": null,
      "drillRange": {
        "minMm": 0.15,
        "maxMm": 6.3,
        "note": "holes with diameter >= 6.3 mm are CNC routed from a smaller drilled hole; min non-plated hole 0.50 mm"
      },
      "notes": "Baseline of the 3rd party fab service. Preferred values in the seed file: default class preferred track 0.2 mm, power class preferred 0.3 mm; preferred via hole 0.2 mm (0.25 mm in the shipped file). Min via allowed on 2-layer. Finished surface copper: 1 oz standard; 2 oz on request (John Lauer, 2026-10-12). Existing weight-conditioned DRC limits remain for 1 oz; confirm 2 oz DFM before use. Hole-barrel plating and thickness tolerances are not specified by this confirmation.",
      "sources": [
        {
          "url": "adom/fusion-bridge addin/AdomBridge/resources/dru/Adom-3rdPartyFab-2-Layer.edru",
          "dateRead": "2026-09-03",
          "kind": "bundled-rule-file"
        },
        {
          "url": "https://wiki.adom.inc/adom/pcb-design-rules/files/docs/3rdpartyfab-finished-copper.md",
          "dateRead": "2026-10-12",
          "kind": "user-confirmed-capability"
        }
      ],
      "finishedCopper": {
        "standardOz": 1,
        "onRequestOz": [
          2
        ],
        "approximateThicknessMm": {
          "1": 0.035,
          "2": 0.07
        },
        "appliesTo": "Finished surface copper; not an inner-layer stackup or barrel-plating specification",
        "thicknessToleranceMm": null,
        "minimumBarrelPlatingMm": null,
        "confirmedBy": "John Lauer",
        "confirmedOn": "2026-10-12"
      },
      "silkscreenPolicy": {
        "schemaVersion": 1,
        "kind": "user-requested-authoring-policy",
        "source": {
          "date": "2026-10-15",
          "description": "User requested 0.8 mm component names, 0.3 mm values, screw sizes, bracket edges and screw clearances on appropriate faces"
        },
        "referenceHeightMm": 0.8,
        "valueHeightMm": 0.3,
        "referenceRequired": true,
        "valueRequired": true,
        "referenceMeaning": "reference designator, e.g. Q1, R12, J9",
        "preserveElectricalValue": true,
        "groupReferenceAndValue": true,
        "allowSilentOmissionOrShrinking": false,
        "mechanical": {
          "screwSizeRequired": true,
          "screwLengthWhenSpecified": true,
          "bracketOutlineOnMountingFace": true,
          "headWasherClearanceOnBearingFace": true,
          "toolAccessOutlineOnAccessFace": true,
          "avoidHolesMaskOpeningsAndFittedBodies": true
        },
        "validation": [
          "native text dimensions",
          "whole-board reference/value inventory",
          "both-face mask, body, hole, outline and text collision review",
          "assembled visibility and association",
          "silkscreen GLB export with drill markers disabled"
        ],
        "manufacturingLimitStatus": "Authoring requirement only; does not establish minimum printable stroke, spacing or legibility. Existing unknown silkLineWidth/silkToCopper remain null."
      }
    },
    {
      "process": "standard",
      "layerCount": 4,
      "minTraceWidth": {
        "mm": 0.09,
        "mil": 3.54,
        "condition": "1 oz copper, multilayer"
      },
      "minSpacing": {
        "mm": 0.09,
        "mil": 3.54,
        "condition": "1 oz copper, multilayer, different nets; 3 mil acceptable in BGA fan-outs"
      },
      "minDrill": {
        "mm": 0.15,
        "mil": 5.91
      },
      "minVia": {
        "drillMm": 0.15,
        "drillMil": 5.91,
        "padMm": 0.25,
        "padMil": 9.84
      },
      "annularRing": {
        "viaMm": 0.1,
        "viaMil": 3.94,
        "padMm": 0.18,
        "padMil": 7.09,
        "note": "0.25 mm or above preferred"
      },
      "copperToBoardEdge": {
        "mm": 0.2,
        "mil": 7.87
      },
      "holeToHole": {
        "mm": 0.2,
        "mil": 7.87
      },
      "maskExpansion": {
        "mm": 0.038,
        "mil": 1.5
      },
      "maskSliver": null,
      "silkLineWidth": null,
      "silkToCopper": null,
      "minCopperClearance": {
        "mm": 0.09,
        "mil": 3.54,
        "condition": "different nets"
      },
      "boardThicknessOptionsMm": [
        1.6
      ],
      "copperWeightOptionsOz": [
        1,
        2
      ],
      "surfaceFinishes": [],
      "maxBoardSize": null,
      "drillRange": {
        "minMm": 0.15,
        "maxMm": 6.3,
        "note": "holes with diameter >= 6.3 mm are CNC routed from a smaller drilled hole; min non-plated hole 0.50 mm"
      },
      "notes": "BGA pad diameter >= 0.25 mm. BGA pad to trace clearance min 0.09 mm. Vias can be placed within BGA pads using filled and plated-over vias. Finished surface copper: 1 oz standard; 2 oz on request (John Lauer, 2026-10-12). Existing weight-conditioned DRC limits remain for 1 oz; confirm 2 oz DFM before use. Hole-barrel plating and thickness tolerances are not specified by this confirmation.",
      "sources": [
        {
          "url": "adom/fusion-bridge addin/AdomBridge/resources/dru/Adom-3rdPartyFab-4-Layer.edru",
          "dateRead": "2026-09-03",
          "kind": "bundled-rule-file"
        },
        {
          "url": "https://wiki.adom.inc/adom/pcb-design-rules/files/docs/3rdpartyfab-finished-copper.md",
          "dateRead": "2026-10-12",
          "kind": "user-confirmed-capability"
        }
      ],
      "finishedCopper": {
        "standardOz": 1,
        "onRequestOz": [
          2
        ],
        "approximateThicknessMm": {
          "1": 0.035,
          "2": 0.07
        },
        "appliesTo": "Finished surface copper; not an inner-layer stackup or barrel-plating specification",
        "thicknessToleranceMm": null,
        "minimumBarrelPlatingMm": null,
        "confirmedBy": "John Lauer",
        "confirmedOn": "2026-10-12"
      },
      "silkscreenPolicy": {
        "schemaVersion": 1,
        "kind": "user-requested-authoring-policy",
        "source": {
          "date": "2026-10-15",
          "description": "User requested 0.8 mm component names, 0.3 mm values, screw sizes, bracket edges and screw clearances on appropriate faces"
        },
        "referenceHeightMm": 0.8,
        "valueHeightMm": 0.3,
        "referenceRequired": true,
        "valueRequired": true,
        "referenceMeaning": "reference designator, e.g. Q1, R12, J9",
        "preserveElectricalValue": true,
        "groupReferenceAndValue": true,
        "allowSilentOmissionOrShrinking": false,
        "mechanical": {
          "screwSizeRequired": true,
          "screwLengthWhenSpecified": true,
          "bracketOutlineOnMountingFace": true,
          "headWasherClearanceOnBearingFace": true,
          "toolAccessOutlineOnAccessFace": true,
          "avoidHolesMaskOpeningsAndFittedBodies": true
        },
        "validation": [
          "native text dimensions",
          "whole-board reference/value inventory",
          "both-face mask, body, hole, outline and text collision review",
          "assembled visibility and association",
          "silkscreen GLB export with drill markers disabled"
        ],
        "manufacturingLimitStatus": "Authoring requirement only; does not establish minimum printable stroke, spacing or legibility. Existing unknown silkLineWidth/silkToCopper remain null."
      }
    }
  ]
}