circuit-json-to-lbrn

Convert Circuit JSON to LBRN XML for PCB fabrication via laser ablation.

Usage

import { convertCircuitJsonToLbrn } from "circuit-json-to-lbrn"

// Generate copper layer only
const copperLbrn = convertCircuitJsonToLbrn(circuitJson, {
  includeCopper: true,
  includeSoldermask: false,
})

// Generate soldermask layer only (for cutting polyimide sheet)
const soldermaskLbrn = convertCircuitJsonToLbrn(circuitJson, {
  includeCopper: false,
  includeSoldermask: true,
})

// Generate both layers together in one file
const bothLbrn = convertCircuitJsonToLbrn(circuitJson, {
  includeCopper: true,
  includeSoldermask: true,
})

// Default behavior (copper only, backward compatible)
const defaultLbrn = convertCircuitJsonToLbrn(circuitJson)

Options

• includeCopper?: boolean - Include copper traces and pads (default: true)
• includeSoldermask?: boolean - Include soldermask openings for cutting polyimide sheet (default: false)
• includeSilkscreen?: boolean - Include silkscreen layer (not implemented yet)
• origin?: { x: number; y: number } - Set the origin point for the conversion
• margin?: number - Set the margin around the PCB

Soldermask Support

The includeSoldermask flag enables generation of soldermask openings for cutting polyimide sheet. When enabled:

• SMT pads and plated holes will have soldermask openings
• Traces are NOT included in the soldermask layer (to avoid accidental bridging during soldering)
• Holes are always cut through the board regardless of the mode

You can generate:

• Copper only: { includeCopper: true, includeSoldermask: false } - Traditional copper cutting
• Soldermask only: { includeCopper: false, includeSoldermask: true } - Just polyimide cutting patterns
• Both: { includeCopper: true, includeSoldermask: true } - Complete fabrication file with both layers