Rigid flexible printed circuit board and method of fabricating same
First Claim
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1. A method of fabricating a rigid flexible printed circuit board, comprising the steps of:
- preparing a circuit layer, the circuit layer comprising;
a first insulating layer through which a first window is formed;
an internal circuit pattern which is formed on a side of the first insulating layer having the first window; and
first and second protective films for protecting a portion of the internal circuit pattern formed in the first window;
preparing a second insulating layer through which a second window is formed so as to correspond to the first window;
layering a plurality of circuit layers and a plurality of second insulating layers to form a laminate; and
forming external layers, through which third windows are formed so as to correspond to the first and second windows, on upper and lower sides of the laminate, each of the external layers comprising;
an external circuit pattern which corresponds to the internal circuit pattern; and
third and fourth protective films which protect a portion of the external circuit pattern formed in each of the third windows,wherein a portion corresponding to the first, second, and third windows is a flexible portion.
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Abstract
A rigid flexible printed circuit board (PCB) and a method of fabricating the same. Since a polyimide copper clad laminate is not used during the fabrication of the rigid flexible PCB, an increase in cost resulting from use of the polyimide copper clad laminate and poor reliability of adhesion at an interface between different materials are avoided.
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Citations
13 Claims
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1. A method of fabricating a rigid flexible printed circuit board, comprising the steps of:
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preparing a circuit layer, the circuit layer comprising; a first insulating layer through which a first window is formed; an internal circuit pattern which is formed on a side of the first insulating layer having the first window; and first and second protective films for protecting a portion of the internal circuit pattern formed in the first window; preparing a second insulating layer through which a second window is formed so as to correspond to the first window; layering a plurality of circuit layers and a plurality of second insulating layers to form a laminate; and forming external layers, through which third windows are formed so as to correspond to the first and second windows, on upper and lower sides of the laminate, each of the external layers comprising; an external circuit pattern which corresponds to the internal circuit pattern; and third and fourth protective films which protect a portion of the external circuit pattern formed in each of the third windows, wherein a portion corresponding to the first, second, and third windows is a flexible portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of fabricating a rigid flexible printed circuit board, comprising the steps of:
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forming first and second internal circuit patterns, which are electrically connected to each other, on both sides of a first insulating layer through which a first window is formed, and applying first, second, third, and fourth protective films, which correspond to the first window, on both sides of the first insulating layer to protect portions of the first and second internal circuit patterns in the first window, thus preparing a circuit layer; preparing a second insulating layer through which a second window is formed so as to correspond to the first window; layering a plurality of circuit layers and a plurality of second insulating layers to form a laminate; and forming external layers, through which third windows are formed so as to correspond to the first and second windows, on upper and lower sides of the laminate, each of the external layers comprising; an external circuit pattern which corresponds to the first and second internal circuit patterns; and fifth and sixth protective films which protect a portion of the external circuit pattern formed in each of the third windows, wherein a portion corresponding to the first, second, and third windows is a flexible portion. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification