Flexible printed circuit board and its manufacturing method
A technology of flexible circuit boards and flexible circuit substrates, which is applied in the fields of printed circuit manufacturing, printed circuits, printed circuits, etc., can solve problems such as the number of layers and the thickness of flexible circuit boards that cannot adapt to the development trend of circuit boards, and achieve thin stacking Effect
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[0018] The embodiment of the present invention provides a method for manufacturing a double-sided flexible circuit board with a shielding effect, including the steps:
[0019] The first step, see figure 1 , Provide a flexible circuit substrate 100.
[0020] The flexible circuit substrate 100 includes a base layer 110 and a first copper foil layer 111 and a second copper foil layer 112 formed on both sides of the base layer 110. The flexible circuit substrate 100 further includes at least one via 114, and the via 114 sequentially penetrates the first copper foil layer 111, the base layer 110 and the second copper foil layer 112. The base layer 110 may be a flexible resin layer, such as Polyimide (PI), Polyethylene Terephthalate (PET) or Polythylene Naphthalate (Polythylene Naphthalate, PEN), it can also be a multilayer substrate.
[0021] In this embodiment, at least one through hole is opened on the base layer 110, and then the first copper foil layer 111 and the second copper foil...
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