Abstract:
A method and an arrangement are disclosed for producing an electrically conductive pattern on a surface. Electrically conductive solid particles are transferred onto an area of predetermined form on a surface of a substrate. The electrically conductive solid particles are heated to a temperature that is higher than a characteristic melting point of the electrically conductive solid particles, thus creating a melt. The melt is pressed against the substrate in a nip, wherein a surface temperature of a portion of the nip that comes against the melt is lower than said characteristic melting point.
Abstract:
Disclosed herein are an insulating substrate for a printed circuit board and a printed circuit board, and more particularly, an insulating substrate for a printed circuit board and a printed circuit board capable of improving fill plating property of an inner via hole.The insulating substrate for a printed circuit board includes: an electrical insulating resin; and a plurality of reinforcement materials formed in the electrical insulating resin, wherein the plurality of reinforcement materials are configured so that one or more reinforcement materials are formed to be symmetrical with each other at each of the upper and lower portions based on a central reinforcement material formed at a central portion in the electrical insulating resin, and a thickness of the central reinforcement material is thicker than those of the remaining other reinforcement materials.
Abstract:
Disclosed is a PCB having multiple layers of heavy copper. A prepreg having a nonwoven glass web substrate is used alone or together with another prepreg having a glass fabric substrate so that the space between heavy copper, which is comparable to a thick film, can be filled efficiently without creating voids. The PCB includes a copper clad laminate having first copper patterned on one surface or both surfaces of a core substrate; at least one first prepreg laminated on one surface or both surfaces of the copper clad laminate, nonwoven glass web being used as the substrate of the first prepreg; at least one second prepreg laminated on one surface or both surfaces of the first prepreg, glass fabric being used as a substrate of the second prepreg; and second copper laminated on one surface or both surfaces of the second prepreg.
Abstract:
The present disclosure relates to thermoplastic electrostatic dissipative (ESD) composites. The disclosed composites comprise a thermoplastic resin phase and a plurality of intermediate modulus carbon fibers dispersed within the thermoplastic resin phase. Also disclosed herein are methods for the manufacture and/or use of the disclosed ESD composites as well as articles formed from such composites.
Abstract:
Epoxy laminates, e.g. CEM-1 laminates, include polymeric particles, particularly core-shell particles having an average diameter of about 0.05 to 30 μm, which reduce the dust produced during manufacture of printed circuit boards.
Abstract:
A method of manufacturing an insulating sheet, a method of manufacturing a copper clad laminate, and a method of manufacturing a printed circuit board, as well as a printed circuit board manufactured using these methods are disclosed. The method of manufacturing an insulating sheet can include: forming a thermoplastic reinforcement material, which includes fibers secured by a thermoplastic polymer binder, and in which pores are formed; forming a thermoplastic resin layer such that the thermoplastic reinforcement material is impregnated with a thermoplastic resin; and hot pressing the thermoplastic reinforcement material and the thermoplastic resin layer. This method can be utilized to manufacture an insulating sheet, which has a low rate of moisture absorption and superb electrical properties, including a low dielectric constant (Dk) and low dielectric loss (Df), and in which the fibers can readily be impregnated with the resin.
Abstract:
A printed wiring board is manufactured by a method in which a core substrate having an insulation substrate and a conductive circuit formed on the insulation substrate is provided. An inner insulation layer is formed on the core substrate, and a surface of the inner insulation layer is treated to form a roughened portion on the surface. An outer insulation layer including a reinforcing material is formed on the surface of the inner insulation layer having the roughened portion.
Abstract:
An object of the present invention is to provide a method for manufacturing a porous material in which complicated and fine through portions, recessed portions, and the like have been patterned. It is to provide a patterned porous molded product or nonwoven fabric, in which a plated layer has been selectively formed on the surfaces of the through portions and the recessed portions.With the invention, a mask having through portions in a pattern is placed on at least one side of the porous molded product or the nonwoven fabric. A fluid or a fluid containing abrasive grains is sprayed from above the mask, thereby to form through portions or recessed portions, or both of them, to which the opening shape of each through portion of the mask has been transferred, in the porous molded product or the nonwoven fabric. The invention provides a porous molded product or a nonwoven fabric in which a plated layer has been selectively formed on the surfaces of the through portions or the recessed portions, or both of these, an electric circuit component, or the like.
Abstract:
Epoxy laminates, e.g. CEM-1 laminates, include polymeric particles, particularly core-shell particles having an average diameter of about 0.05 to 30 μm, which reduce the dust produced during manufacture of printed circuit boards.
Abstract:
A sheet comprising thermoplastic polymer (TP) and short high tensile modulus fibers, in which the concentration of TP in the middle of the sheet is higher than at the surface of the sheet, useful for making prepregs with a thermoset resin.