Everything about SMT patch
Outdated PCBs generally seemed such as program demonstrated below, in which copper traces are exposed and several by way of-holes are utilized to maintain huge, cumbersome factors.絲網印刷:把預先設計好的電路圖制成絲網遮罩,絲網上不需要的電路部分會被蠟或者不透水的物料覆蓋,然後把絲網遮罩放到�