On a single-sided board
, on the most basic PCB, the parts are concentrated on one side and the wires are concentrated on the other side. Because the wire only appears on one side, we call it a single-sided board. Because single-sided boards have many strict restrictions on the design line (because there is only one side, the wirings cannot cross each other and must follow a separate path), so only the early circuits use such boards.
The material of the single-sided circuit board is mainly composed of a paper phenol copper laminate and a paper epoxy resin copper laminate. Most of the single-sided circuit boards are used in home appliances such as radios, heaters, refrigerators, washing machines, and commercial machines such as printers, vending machines, circuit machines, and electronic components. The advantages of single-sided printed circuit boards are low prices.
Single-sided board category: FR-1, FR-4, CEM-1, CEM-3, 94V0