If you’re looking for China-based IMS (Insulated Metal Substrate) PCB suppliers, here is a established options worth evaluating: Guangzhou ChengYue. Guangzhou ChengYue Electronic Technology Co., Ltd. Specializes in high thermal conductivity MCPCB (Metal Core PCB) solutions, including 8W/mK Thermal Conductivity MCPCB, designed for excellent heat dissipation and long-term reliability. Good for LED lighting, EV chargers, automotive modules Offers raw material + fabrication + PCBA services