摘要:
An exemplary method for manufacturing flexible printed circuit board is provided. A metal foil is supplied from a first feeding roller. The metal foil has a first surface and a second surface on two opposite sides of the metal foil. A first coverlay having a number of first openings defined therein is supplied from a second feeding roller and laminated on the first surface of the metal foil. Electrical traces are formed with the metal foil. A second coverlay having a number of second openings defined therein is supplied from a third feeding roller and laminated on the second surface of the metal foil. Each of the second openings registers with the respective first opening so that the electrical traces are exposed from the corresponding first and second openings. The method can improve quality and efficiency of manufacturing flexible printed circuit boards in a hollowed out form.
摘要:
A method for assembling an electronic component on a printed circuit board includes following steps. Firstly, a printed circuit board substrate including a central main portion and a peripheral unwanted portion is provided. Secondly, electrically conductive patterns and reinforcing patterns are formed on the main portion and the unwanted portion respectively. Thirdly, an electronic component is mounted on the main portion and electrically connected with the electrically conductive patterns. Fifthly, the unwanted portion is removed.
摘要:
A circuit substrate includes an electrically conductive layer having electrically conductive patterns formed therein, an insulating layer having a through hole, and a composite layer positioned between the electrically conductive layer and the insulating layer. The through hole is configured for having an electronic component mounted thereon. The composite layer includes a polymer matrix and at least one carbon nanotube bundle embedded in the polymer matrix. One end of the at least one carbon nanotube bundle contacts the electrically conductive patterns, and the other is exposed in the through hole of the insulation layer.
摘要:
A printed circuit board includes an insulating layer, a copper layer formed on the insulating layer and a reinforcing layer formed on the copper layer at opposite sides of the given portion. The copper layer includes a plurality of electrical traces at a given portion thereof. A thickness of the reinforcing layer increases in a direction away from the given portion. A method for manufacturing the printed circuit board is also provided in this disclosure.
摘要:
A method for making conductive wires is provided. Firstly, an ink having carbon nanotubes is provided. Secondly, a baseline is formed using the ink on a substrate. Thirdly, the baseline is electroless plated.
摘要:
A printed circuit board includes a substrate having a surface, a circuit layer having a plurality of electrical traces formed on the surface, and an electrically conductive metal layer formed on the circuit layer. The circuit layer is comprised of a composite of carbon nano-tubes and metallic nano-particles.
摘要:
The present invention relates to a printed circuit board. In one embodiment, a printed circuit board includes a dielectric layer and a conductive trace formed on the dielectric layer. The conductive layer includes a first conductive portion, a connecting portion and a second conductive portion. The connecting portion includes a first end and a second end. The first end is connected to the first conductive portion; the second end is connected to the second conductive portion. A width of the connecting portion gradually decreases from the first end to the second end. Reflection and cross talk of signals transmitted in the presented printed circuit board can be reduced.
摘要:
A method for making carbon nanotube precious metal nanoparticles composite includes the following steps. A solution dissolving precious metal ions is provided. A water soluble polymer is provided and dissolved in water to form a solution of the soluble polymer. The solution of the precious metal ions is added into the solution of the soluble polymer to form a first mixture. A solution of carbon nanotubes is provided and added in the first mixture to form a second mixture. The second mixture is irradiated via radiation, the radiation have a wave length less than 450 nm.
摘要:
A method for manufacturing a rigid-flexible printed circuit boards includes following steps. Firstly, a flexible substrate is provided. Secondly, at least one slit is defined in the flexible substrate. Thirdly, a rigid substrate having a structure corresponding to the flexible substrate is provided. Fourthly, the flexible substrate is laminated to the rigid substrate to obtain a laminated substrate. Fifthly, part of the rigid substrate is removed. Sixthly, the laminated substrate is cut along an imaginary boundary line to remove waste portion of the laminated substrate. Thus, a rigid-flexible printed circuit board is obtained.
摘要:
A method for manufacturing a multilayer FPCB includes the steps of: providing a first copper clad laminate, a second copper clad laminate and a binder layer; defining an opening on the binder layer; defining a first slit on the first copper clad laminate; laminating the first copper clad laminate, the binder layer and the second copper clad laminate; defining a via hole for establishing electric connection between the first copper clad laminate and the second copper clad laminate; cutting the first copper clad laminate, the binder layer and the second copper clad laminate thereby forming a multilayer flexible printed circuit board having different numbers of layers in different areas.