High TG board PCB clone is a professional and high-precision reverse engineering technology targeting high glass transition temperature (TG) printed circuit boards, which is widely applied in industrial control, automotive electronics, aerospace, and high-temperature resistant electronic equipment fields. The TG value of ordinary PCB boards is usually between 130℃ and 140℃, while high TG PCB boards have a TG value above 170℃, featuring excellent high-temperature resistance, low thermal expansion coefficient, high mechanical stability, and reliable insulation performance. These unique physical and chemical properties make the cloning process of high TG boards significantly different from conventional PCB cloning, putting forward higher requirements for process precision, material matching, and technical operation specifications.

The core difficulty of high TG board PCB clone lies in the material identification and process restoration of the original board. First of all, in the preliminary detection stage, professional testing equipment is required to accurately measure the TG value, substrate thickness, copper foil thickness, solder mask ink type, and curing parameters of the original high TG board. Different brands of high TG substrates (such as Shengyi, Kingboard, and international imported substrates) have different resin formulas and thermal stability parameters. Blindly using ordinary substrates for cloning will lead to product failure problems such as delamination, bubbling, and warping in high-temperature working environments. Therefore, material parameter matching is the primary link to ensure the consistency of cloned high TG boards.

In the specific cloning operation process, the disassembly and layer stripping of high TG boards need to adopt low-temperature slow stripping technology. Conventional high-temperature layer stripping methods will damage the internal circuit traces and dielectric layers of high TG boards due to excessive temperature, resulting in the loss of tiny line data and affecting the accuracy of reverse data acquisition. After layer stripping, high-definition scanning and microscopic detection are carried out for each layer of the circuit. Professional industrial scanners with micron-level precision are used to collect trace width, line spacing, pad size, via hole aperture, and buried/blind hole distribution data one by one. For the high-density wiring area of high TG boards, secondary calibration and manual verification are required to eliminate data errors caused by substrate texture and tiny scratches.

The production and reproduction stage of high TG cloned boards is also a key link that determines product quality. In the pressing process, strict temperature and pressure curve parameters consistent with the original board must be followed. The high TG substrate has a higher curing temperature and longer curing time than ordinary boards. The lamination temperature needs to be accurately controlled between 180℃ and 200℃, and the constant pressure time is extended accordingly to ensure the tight bonding between dielectric layers and copper layers and avoid interlayer delamination. In the drilling process, high-precision CNC drilling equipment is used to adjust the drilling speed and feed rate, so as to prevent the high-hardness high TG substrate from generating burrs and hole wall roughness, which affects the subsequent metallization process.

In addition, the solder mask treatment and surface finishing of high TG cloned boards need to be matched with high-temperature resistant materials. The selected solder mask ink must have a matching high-temperature resistance level to avoid ink falling off, cracking, and discoloration when the equipment works at high temperature. After the production of the cloned board is completed, a series of strict performance tests are required, including high-temperature aging test, thermal shock test, insulation resistance test, and bending resistance test, to verify that the thermal stability and electrical performance of the cloned high TG board are completely consistent with the original board. High TG board PCB clone is not a simple copy of the circuit structure, but a full restoration of substrate materials, production processes, and performance parameters, which ensures that the cloned product can adapt to harsh high-temperature working environments and meet the long-term stable operation requirements of high-end electronic equipment.