Abstract translation:本发明能够提供一种载体附着金属箔,其中在金属箔和板状载体之间不会发生无意的剥离,同时有可能从板状载体剥离金属箔。 本发明是一种载体附着的金属箔,其包括板状树脂载体和以可剥离的方式机械地附着到载体的至少一个表面的金属箔,其中金属箔和板状的剥离强度 在220℃下加热处理3小时,6小时或9小时后,载体为10gf / cm 2和200gf / cm 2。
Abstract:
The invention relates to a method for producing a circuit board involving the removal of a subregion thereof. In said method, at least two layers or plies of the circuit board (1) are interconnected, the subregion (6) to be removed is prevented from being connected to an adjacent ply of the circuit board by providing a layer (7) of adhesion-preventing or bonding-preventing material, and peripheral zones (8) of the subregion (6) to be removed are separated from adjoining zones of the circuit board (1). According to the invention, a fissure formation and/or a detachment from the subregion (6) of the circuit board (1) to be removed is initiated in a subregion in or on the layer (7) of adhesion-preventing or bonding-preventing material, and the subregion (6) to be removed is then removed, thus making it possible to remove a subregion (6) to be removed from a circuit board (1) in a simple and reliable, and if necessary automated, manner. Also disclosed is a use of such a method for producing a multilayer circuit board (1) and especially for creating voids in such a circuit board (1).
Abstract:
Provided is an ultra-thin copper foil to which a carrier foil is attached, including: a carrier foil, a peeling layer, and an ultra-thin copper foil, wherein the peeling layer includes a first metal A having peelability, a second metal B and a third metal C facilitating coating of the first metal, wherein the amount (a) of the first metal A is in a range of about 30 to about 89% by total weight of the peeling layer, the amount (b) of the second metal B is in a range of about 10 to about 60% by total weight of the peeling layer, and the amount (c) of the third metal C is in a range of about 1 to about 20% by total weight of the peeling layer.
Abstract:
In screen printing for printing cream-like solder on a board 7 through through-holes of a mask plate 12, removal of the board 7 from a lower surface of the mask plate 12 is performed in such a manner that the board 7 is moved down at a first descending velocity V1 as a lower velocity during an initial stroke S1 of from a state where the removal of the board 7 starts to a state where the board 7 is removed from the mask plate 12 so that the distance between the upper surface of the board 7 and the lower surface of the mask plate 12 reaches a predetermined value set to be in a range of from a half to twice as large as the thickness of the mask plate 12, and that the board 7 is moved down at a second descending velocity V2 as a higher velocity after the initial stroke S1. Accordingly, even in the case where solder apt to vary according to the passage of time is used, good removability and stable print quality can be secured.
Abstract:
In a screen printing method of bringing a mask plate into contact with a substrate to print solder cream through a pattern hole on the substrate, a plate separating operation of separating the substrate from the mask plate after a squeegeeing step in which the solder cream is filled into the pattern hole comprises an operationpatternin.which acceleration and deceleration pattern in which a descending speed is accelerated up to an upper limit speed and thereafter decelerated up to a lower limit speed is repeated plural times. Further, an initial upper limit speed in start of the plate separating operation is set higher than the succeeding upper limit speeds, whereby viscosity of the solder cream into the pattern hole in start of the plate separating operation is lowered, and the mask plate can be separated with a high accuracy throughout the entire range of the substrate.
Abstract:
A film for a circuit board, characterized in that it comprises the following A layer and B layer which are adjacent to each other: A layer: a heat−resistant resin layer having a thickness of 2 to 250 μm which comprises a heat−resistant resin having a glass transition temperature of 200˚C or higher or a decomposition temperature of 300˚C or higher, and B layer: a cured resin layer capable of being roughened which has a thickness of 5 to 20 μm and comprises a thermoset product derived from a thermosetting resin composition comprising the component (a) of an epoxy resin having two or more epoxy groups in one molecule thereof and the component (b) a curing agent for an epoxy resin and capable of being roughened by the use of an oxidizing agent. The film allows the production of a circuit board being excellent in the adhesion strength of a conductive layer with ease and simplicity.