Abstract:
The present inventions relates to a method for manufacturing a multilayer FPCB having different number of layers in different areas. The method includes the steps of: providing a binder layer; removing a portion of the binder layer thereby defining an opening in the binder layer; forming a multilayer FPCB which having a first copper clad laminate structure and a second copper clad laminate structure disposed on two opposite sides of the binder layer respectively using the binder layer; cutting the first copper clad laminate structure; cutting the multilayer FPCB in manner that a portion of first copper clad laminate structure that is exposed to the opening is separated from the first copper clad structure thereby obtain a multilayer FPCB having different number of layers in different areas.
Abstract:
A method for forming stacked via-holes on a printed circuit board includes the steps of: providing a printed circuit board having a conductive trace formed on a side surface thereof; forming a first copper-clad laminate on the side surface having the conductive trace; forming a number of first copper micro-via in a copper layer of the first copper-clad laminate; forming a second copper-clad laminate on the surface of the copper layer having the first copper micro-via of the first copper-clad laminate; forming a number of second copper micro-via in a copper layer of the second copper-clad laminate by a first laser on the basis of the first copper micro-via, each second copper micro-via being located corresponding to its correspondingly first copper micro-via; and removing corresponding resin layer portions of the first and second copper-clad laminates, using a second laser, to yield the respective stacked via-holes.
Abstract:
A method for manufacturing of flexible printed circuit boards is provided. The method includes the steps of: providing a tape substrate having an electrically insulating layer and an electrically conducting layer; forming a wiring pattern at the electrically conducting layer; attaching a back film on a surface of the tape substrate; and cutting the tape substrate to get a number of flexible printed circuit boards attached on the back film.
Abstract:
The present invention provides a method for forming flexible printed circuit boards. The method includes the following steps: providing a substrate with a copper film formed on at least one surface of the substrate; and forming a number of copper holes in the copper film through a photolithography process. The photolithography process includes a step of coating a liquid photoresist onto the copper film.
Abstract:
An electroplating apparatus includes an electroplating tank, a first anode plate, a first cathode plate, a second cathode plate, a number of first and second elastic elements, a number of pairs of clamping assemblies, a first drive member, and a second drive member. The electroplating tank holds an electrolyte solution. The first elastic elements are interconnected between the first anode plate and the first cathode plate. The second elastic elements are interconnected between the first anode plate and the second cathode plate. Each pair of clamping assemblies are used to clamp opposite ends of a plated-shaped workpiece. The first drive member and the second drive member are used to cooperatively move the clamping assemblies.
Abstract:
In a method for manufacturing multilayer PCBs having n circuit layers, a flexible substrate strip is provided. The strip comprises a number of PCB units, each comprising n segmental portions. The strip is treated in a reel to reel process to form traces in n−2 segmental portions of each of the PCB units, the other two segmental portions are left untreated without traces. Then the strip is cut to obtain a number of separated PCB units. The PCB unit is folded in such a manner that the n−2 segmental portions having traces are arranged between the other two segmental portions without traces. The folded PCB unit is laminated to form a multilayer substrate and traces are formed in the two segmental portions.
Abstract:
An electronic component device for electrically and mechanically connecting to a lead wire includes a base and a cover. The base includes a receiving body, at least one electronic component, and two spaced stripping connectors. The receiving body defining an installation groove. The at least one electronic component and the stripping connectors are received in the receiving body. Each stripping connector is in electrically connected with the at least one electronic component. The stripping connector defines a stripping slot for extension of the core therethrough, which has a size smaller than or equal to the diameter of the core. The cover includes a pressing surface and an electrically insulating cutting body. The cutting body is used for cutting off the lead wire. The pressing surface is configured for pressing the lead wire into the stripping slot, thus making the core in electrical connection with the at least one electronic component.
Abstract:
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.
Abstract:
A printed circuit board includes a composite layer, a first electrically conductive pattern, and a second electrically conductive pattern. The composite layer includes a polymer matrix and an electrically conductive pin embedded therein. The polymer matrix has a first surface and an opposite second surface. The pin includes a catalyst block and a carbon nanotube bundle grown on the catalyst block. The catalyst block is exposed at the first surface, and the carbon nanotube bundle is exposed at the second surface. The first pattern is formed on the first surface, and includes a first electrical contact, which is electrically coupled to the catalyst block. The second pattern is formed on the second surface, and includes a second electrical contact, which is electrically coupled to the carbon nanotube bundle.
Abstract:
A stiffener sheet for flexible printed flexible printed circuit boards, includes alternately laminated polyimide layers and polyamideimide layers, wherein a molecular structure of the polyamideimide is represented by the following formula: wherein Ar and Ar′ represents different substituted aromatic groups.