PCB Design Rules - kicad/adom-3rdpartyfab-2L.kicad_dru

by adom

Canonical PCB fab design rules (DRC) for every popular vendor: one JSON record per vendor, process and layer count, with generated Fusion/EAGLE .dru and .edru, KiCad .kicad_dru plus board-setup JSON, Altium .RUL exports, and a human comparison table. Every number cites the vendor's own capabilities page and the date it was read.

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John Lauer Document 1 oz finished copper standard and 2 oz request option; preserve existing DRC limits fce5c48 8d ago

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(version 1)

# 3rd party fab 2-layer design rules (standard process)
# 
# Min trace width: 0.1 mm (3.94 mil) - 1 oz copper
# Min spacing: 0.1 mm (3.94 mil) - 1 oz copper, different nets
# Min drill: 0.15 mm (5.91 mil)
# Min via: 0.15 mm hole / 0.25 mm pad
# Annular ring: via 0.1 mm, pad 0.18 mm
# Copper to board edge: 0.2 mm
# Hole to hole: 0.2 mm
# Drill range: 0.15 mm to 6.3 mm
# Board thickness options: 1.6 mm
# Copper weight options: 1 oz, 2 oz
# 
# 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:
# - adom/fusion-bridge addin/AdomBridge/resources/dru/Adom-3rdPartyFab-2-Layer.edru (read 2026-09-03)
# - https://wiki.adom.inc/adom/pcb-design-rules/files/docs/3rdpartyfab-finished-copper.md (read 2026-10-12)

(rule "min-track-width"
  (constraint track_width (min 0.1mm))
  (layer "*.Cu")
  (condition "A.type == 'track'"))

(rule "min-clearance"
  (constraint clearance (min 0.1mm))
  (condition "A.type == 'track' && B.type == 'track'"))

(rule "min-hole"
  (constraint hole (min 0.15mm))
  (condition "A.type == 'pad' || A.type == 'via'"))

(rule "min-via-diameter"
  (constraint via_diameter (min 0.25mm))
  (condition "A.type == 'via'"))

(rule "min-edge-clearance"
  (constraint edge_clearance (min 0.2mm))
  (condition "A.type == 'track'"))

# 3rdPartyFab prints 0.5 mm silkscreen text.
(rule "min-silk-text-height"
  (constraint text_height (min 0.5mm))
  (layer "*.SilkS")
  (condition "A.type == 'text'"))