PCB clone generation of Gerber+NC files is the core output link of PCB reverse cloning and the most essential technical file for PCB factory batch production and processing. Gerber file is the standard photoplot file for PCB circuit pattern production, which records all graphic data of each layer of PCB, including wiring, pads, vias, solder mask, silk screen and solder layer; NC file (Numerical Control file) is the numerical control drilling and routing file dedicated to PCB mechanical processing, which records the position, aperture, hole type and board edge routing path of all drilling holes on the PCB. The combined output of Gerber+NC files realizes the full data coverage of PCB graphic production and mechanical processing, and is the exclusive production file recognized and universally used by global PCB manufacturing factories.

The generation process of Gerber+NC files based on PCB clone is based on the accurate reverse restoration of the original PCB sample. Firstly, through high-precision scanning and circuit reverse analysis, the system completely restores the multi-layer circuit layout, line parameters, pad distribution, layer stack structure and graphic characteristics of the original cloned board, and establishes a 1:1 digital design model consistent with the physical sample. On the basis of completing the reverse layout restoration, technicians optimize and calibrate the design data according to the industrial PCB production process specifications, eliminate design defects such as line width inconsistency, too small line spacing, irregular pad settings and unqualified via hole sizes that do not meet production standards, and ensure that the design data meets the production process requirements of mainstream PCB factories.

In terms of Gerber file generation, the system carries out layered export according to the standard PCB layer structure, including top signal layer, bottom signal layer, all inner signal layers, power layer, ground layer, top solder mask layer, bottom solder mask layer, top silk screen layer, bottom silk screen layer, solder paste layer and board outline layer. Each layer of Gerber file adopts the standard RS-274-X format, which supports automatic recognition and processing by PCB photolithography equipment. The file accurately records key process parameters such as line width, line spacing, pad aperture, via hole size, solder mask expansion and contraction value, and silk screen font size, ensuring that the circuit pattern produced by the factory is completely consistent with the original cloned board. For HDI boards, high-frequency boards and high-precision multi-layer boards, the Gerber file will be finely optimized for tiny lines, micro-vias and dense pads to avoid production short circuit and open circuit problems.

The NC file is generated synchronously according to the PCB mechanical structure and drilling parameters of the cloned board. Professional drilling analysis software identifies all hole types on the PCB, including through holes, blind holes, buried holes, positioning holes, mounting holes and process holes, and classifies and sorts them according to aperture size and processing sequence. The NC file records the precise X and Y coordinate positions of each hole, drilling depth, drilling aperture, spindle speed and feed rate parameters, and matches the standard numerical control drilling machine processing format. At the same time, the NC routing file is generated according to the PCB outline shape, which defines the board edge cutting path, cutting depth and tool parameters, ensuring that the outline size and shape of the produced PCB are completely consistent with the original sample.

The generated Gerber+NC file set has complete production practicability and industrial compatibility, and can be directly delivered to PCB manufacturing factories for plate making, drilling, routing, solder mask printing, silk screen printing and other full-process production without secondary modification. This technology completely solves the problem that the original production files of discontinued PCB boards and imported circuit boards are missing, enabling enterprises to realize accurate batch replication of various complex PCBs. In addition, Gerber+NC files are the standard files for PCB quality inspection and process verification, which can effectively control the production precision and yield of cloned PCBs, and ensure that the electrical performance, structural size and process quality of the replicated products are consistent with the original sample, providing a solid technical guarantee for mass production and stable supply of cloned PCBs.