Manufacturing method of rigid-flexible printed circuit board and structure thereof
First Claim
1. A method of manufacturing a printed circuit board, comprising:
- preparing a plurality of printed films, each of which includes a thermoplastic resin film and a conductive circuit formed on at least one side of the resin film;
forming holes in the resin films of the printed films;
filling an interlayer connection material into the holes, for forming an interlayer connector for electrically connecting the conductive circuits between adjacent resin films;
stacking the printed films in a stacking direction; and
bonding the resin films of the stacked printed films by heating and pressurizing, so that a multi-layer printed circuit board is formed, wherein the method further comprising a slit forming step for forming a silt at a predetermined position at least in a part of the resin films of the printed films, and the silt forming step is performed before the stacking.
1 Assignment
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Accused Products
Abstract
In a manufacturing method of a rigid-flexible printed circuit board, slits for defining two sides of a removing portion are formed in a part of plural resin films, and the plural resin films are stacked and bonded to form a circuit board. Then, a product portion is cut from the circuit board. Before the bonding, a separation sheet is disposed between predetermined adjacent layers of the plural resin films to separate the removing portion from a residual portion of the product portion. Accordingly, while the product portion is cut from the circuit board, the removing portion is separated from the product portion, because the removing portion are defined by the separation sheet, the slits, and a cutting outline of the product portion.
13 Citations
17 Claims
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1. A method of manufacturing a printed circuit board, comprising:
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preparing a plurality of printed films, each of which includes a thermoplastic resin film and a conductive circuit formed on at least one side of the resin film;
forming holes in the resin films of the printed films;
filling an interlayer connection material into the holes, for forming an interlayer connector for electrically connecting the conductive circuits between adjacent resin films;
stacking the printed films in a stacking direction; and
bonding the resin films of the stacked printed films by heating and pressurizing, so that a multi-layer printed circuit board is formed, wherein the method further comprising a slit forming step for forming a silt at a predetermined position at least in a part of the resin films of the printed films, and the silt forming step is performed before the stacking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of manufacturing a printed circuit board, comprising:
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preparing a plurality of first printed films, each of which includes a resin film and a conductive circuit formed at least one side of the resin film;
preparing a plurality of second printed films, each of which includes the resin film and a conductive circuit formed at least one side of the resin film;
forming holes in the resin films of the first and second printed films;
filling an interlayer connection material into the holes, for forming an interlayer connector for electrically connecting the connective circuits between adjacent resin films;
forming a slit penetrating through the resin film at a predetermined position in each first printed film;
stacking the first printed films and the second printed films in a stack direction such that at least two of the first printed films are adjacent to each other in the stacking direction; and
bonding the resin films of the stacked first and second printed films by heating and pressurizing, so that a multi-layer printed circuit board is formed, wherein, in the stacking, the slits of the at least two resin films of the first printed films are linked with each other at the predetermined position. - View Dependent Claims (13, 14)
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15. A printed circuit board, comprising:
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a plurality of printed films that are stacked and bonded to form a multi-layer printed circuit board, wherein each of the printed films includes a thermoplastic resin film and a conductive circuit provided on at least one side of the resin film, wherein the resin films have a plurality of holes; and
an interlayer connection material filled in the holes, for forming an interlayer connector for electrically connecting the conductive circuits between adjacent printed films, wherein;
a part of the resin films has a slit at a predetermined position; and
the slit has a length in an extending direction perpendicular to a stack direction of the printed films, that is equal to a dimension of the multi-layer printed circuit board in the extending direction. - View Dependent Claims (16, 17)
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Specification