Abstract:
A method for forming electrical traces on a substrate includes the steps of: providing a substrate; printing an ink pattern using an ink on the substrate, the ink including a aqueous medium containing silver ions and a heat sensitive reducing agent; heating the ink pattern to reduce silver ions into silver particles thereby forming an semi-finished traces; and forming a metal overcoat on the semi-finished traces by electroless plating thereby obtaining patterned electrical traces.
Abstract:
A method for manufacturing a PCB is related. The method includes providing a substrate with two opposite conductive layers and defining a through hole passing through the two conductive layers; forming a first electrically conductive metal layer on an inner surface of the substrate in the through hole using an electro-less plating process; forming a second electrically conductive metal layer on the first electrically conductive metal layer using an electro-plating process till the through hole being filled.
Abstract:
An exemplary system for processing a workpiece comprises a conveyor, a first liquid spraying device, a second liquid spraying device, and a substrate positioning device. The conveyor is configured for conveying the workpiece along a conveying direction. The first and second liquid spraying devices for spraying liquid onto the workpiece transported on the conveyor face the conveyor and are arranged along the conveying direction. The substrate positioning device for reorienting the workpiece on the conveyor is installed between the first and second liquid spraying devices and faces the conveyor.
Abstract:
A printed circuit board substrate includes a metal-clad substrate and a number of N spaced circuit substrates arranged on the metal-clad substrate along an imaginary circle, N is a natural number greater than 2. The circuit substrates are equiangularly arranged about the center of the circle, and each of the circuit substrates is oriented 360/N degrees with respect to a neighboring printed circuit board.
Abstract:
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.
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.
Abstract:
An exemplary method for manufacturing printed circuit boards is provided. In the method, a substrate having a first surface and a second surface on an opposite side of the substrate to the first surface is provided. A number of through holes in the substrate between the first surface and the second surface are formed. An electrically conductive paste is applied to the substrate to fill the through holes defined in the substrate to form a plurality of filling members and be printed on at least one of the first surface and the second surface of the substrate to form a number of electrical traces. The filling members located in the through hole in the substrate and the electrical traces printed on the substrate are cured.
Abstract:
A multilayer printed circuit board includes a first printed circuit board, a second printed circuit board, an adhesive film, and a function layer. The adhesive film is sandwiched between the first printed circuit board and the second printed circuit board. The function layer is disposed between the first printed circuit board and the second printed circuit board for blocking water from passing therethrough and for screening electromagnetic interference between the first printed circuit board and the second printed circuit board.
Abstract:
The present invention relates to a method of cutting PCB module using a laser. The method includes steps of: providing a coverlay film, the coverlay film including at least one opening defined therein; attaching the coverlay film onto the PCB module such that the through holes of the PCB module are covered by the coverlay film and the laser cutting area thereof is exposed via the at least one opening; applying a laser beam to the exposed laser cutting area of the PCB module to cutt the PCB module; and removing the coverlay film. A high positioning precision of the PCB module and better cutting result can be obtained.
Abstract:
An exemplary adhesive layer includes an adhesive main body having a first adhesive surface and a second adhesive surface on an opposite side of the adhesive main body to the first adhesive surface. The adhesive main body defines a number of through-holes between the first adhesive surface and the second adhesive surface therein. The through-holes are filled with an inner adhesive that has a higher adhesion than the adhesive main body. Adhesiveness of the first adhesive surface and the second adhesive surface of the adhesive main body can be improved, thereby preventing a printed circuit board having the adhesive layer from distortion.