How UV laser 355nm realizes precision laser marking on flexible circuit board FPC   Flexible circuit board is a technology developed in the 1970s due to aerospace rocket technology, but now it has more and more extensive uses. In recent years, with the rapid development of the 3C industry, flexible circuit boards have a wider range of application scenarios, but the cost of flexible circuit boards is relatively high. Doing a good job in quality control and reducing losses are common requirements for all relevant manufacturers.