Electronic Products Includes consumer products, some computer and computer peripherals suitable for applications where cosmetic imperfections are not important and the major requirement is function of the completed Class 2 Dedicated Service Electronic Products Includes communications equipment, sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted in life support items or flight control systems. Printed boards in this class are suitable for applications where high levels of assurance are required and service is essential. PCB Types In IPC-6012B

Electronic Products: Includes consumer products, some computer and computer peripherals suitable for applications where cosmetic imperfections are not important and the major requirement is function of the completed Class 2 Dedicated Service Electronic Products: Includes communications equipment, sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted in life support items or flight control systems. Printed boards in this class are suitable for applications where high levels of assurance are required and service is essential. PCB Types In IPC-6012B

Electronic Products: Includes consumer products, some computer and computer peripherals suitable for applications where cosmetic imperfections are not important and the major requirement is function of the completed Class 2 Dedicated Service Electronic Products: Includes communications equipment, sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted in life support items or flight control systems. Printed boards in this class are suitable for applications where high levels of assurance are required and service is essential. PCB Types In IPC-6012B

Electronic Products Includes consumer products, some computer and computer peripherals suitable for applications where cosmetic imperfections are not important and the major requirement is function of the completed • Class 2 Dedicated Service Electronic Products Includes communications equipment, sophisticated business ma- chines, instruments where high performance and extended life is required and for which uninterrupted in life support items or flight control systems. Printed boards in this class are suitable for applications where high levels of assurance are required and service is essential. PCB Calculator 7 / 7

Electronic Products: Includes consumer products, some computer and computer peripherals suitable for applications where cosmetic imperfections are not important and the major requirement is function of the completed Class 2 Dedicated Service Electronic Products: Includes communications equipment, sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted in life support items or flight control systems. Printed boards in this class are suitable for applications where high levels of assurance are required and service is essential. PCB Types In IPC-6012B

Electronic Products: Includes consumer products, some computer and computer peripherals suitable for applications where cosmetic imperfections are not important and the major requirement is function of the completed Class 2 Dedicated Service Electronic Products: Includes communications equipment, sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted in life support items or flight control systems. Printed boards in this class are suitable for applications where high levels of assurance are required and service is essential. PCB Types In IPC-6012B

Electronic Products: Includes consumer products, some computer and computer peripherals suitable for applications where cosmetic imperfections are not important and the major requirement is function of the completed Class 2 Dedicated Service Electronic Products: Includes communications equipment, sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted in life support items or flight control systems. Printed boards in this class are suitable for applications where high levels of assurance are required and service is essential. PCB 类型 在 IPC-6012B 中，还定义了

layers. To create designs with an odd number of layers (for example, flexible printed circuits or metal-core printed circuits), simply choose the next highest even number and ignore the extra layer. Next, if of the footprint. Pads may be unlocked to allow free movement, which can be useful for certain applications (such as through-hole footprints with varying lead positions) but is generally never recommended creating copper zones on signal layers. In KiCad, the Copper Zone tool is used for both these applications. Zones are defined by a polygonal outline that defines the maximum extent of the filled copper

layers. To create designs with an odd number of layers (for example, flexible printed circuits or metal-core printed circuits), simply choose the next highest even number and ignore the extra layer. Next, if of the footprint. Pads may be unlocked to allow free movement, which can be useful for certain applications (such as through-hole footprints with varying lead positions) but is generally never recommended creating copper zones on signal layers. In KiCad, the Copper Zone tool is used for both these applications. Zones are defined by a polygonal outline that defines the maximum extent of the filled copper

layers. To create designs with an odd number of layers (for example, flexible printed circuits or metal-core printed circuits), simply choose the next highest even number and ignore the extra layer. Next, if of the footprint. Pads may be unlocked to allow free movement, which can be useful for certain applications (such as through-hole footprints with varying lead positions) but is generally never recommended creating copper zones on signal layers. In KiCad, the Copper Zone tool is used for both these applications. 38 Zones are defined by a polygonal outline that defines the maximum extent of the filled copper