Flexiable printing wiring board
A flexible printing and wiring board technology, applied in printed circuits, electrical components, etc., can solve problems such as narrowing the gap between components and circuit substrates, and poor flux cleaning, and achieve the effect of improving shielding properties and suppressing noise.
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Embodiment 1
[0032] Fig. 1 shows an example of the pattern of the flexible printed wiring board (FPC) of the present invention, the basic structure of this FPC 1 and Figure 7 The structures shown in ˜ FIG. 8 are the same, so repeated descriptions of the same structural parts are omitted.
[0033] and Figure 7 8 is the same as FPC1 in FIG. 8 , since the shielding property is kept good, the copper foil 4 is left as a ground pattern at the lower part of the component 6 . In this invention, the notch part 11 is provided in this ground pattern, and the thickness part of the copper foil 4 is partially removed. At least one notch 11 is provided at a lower position of member 6 .
[0034] In the illustrated example, a notch portion 11 is recessed in a substantially central portion of the member 6 along the spraying direction of the cleaning liquid. Further, a notched protruding portion 11 a is provided so that at least one end of the notch portion 11 on the side where the cleaning liquid is sp...
Embodiment 2
[0042] FIG. 4 shows another example of the pattern of the FPC of the present invention, and repeated description of the same structural parts as in the first embodiment is omitted.
[0043] In this embodiment, at the left and right substantially central parts of the member 6, a notch 11 is recessed along the spraying direction of the cleaning liquid, and the upper and lower ends of the notch 11 protrude from the outer periphery of the member 6 to the upper and lower outer sides. There are two notched protrusions 11a, 11a. Further, notch portions 11B, 11B are provided branchingly from the upper and lower substantially central portions of the notch portion 11 toward the left and right sides.
[0044] In this way, among the notches 11 in the vertical direction, the notches 11B diverge in a plurality of different directions (left and right directions in the illustration) at the lower position of the member 6, so the groove-like recesses 12B formed by the depression of the coating ...
Embodiment 3
[0050] Figure 7 It shows another example of the pattern of the FPC of this invention, and the repeated description of the same structural part as Example 1 and Example 2 is omitted.
[0051] In this embodiment, a notch 11 is recessed in the substantially central part of the component 6 along the spraying direction of the cleaning liquid, so that the upper and lower ends of the notch 11 protrude from the outer periphery of the component 6 to the upper and lower outer sides, and two notches are provided. Protrusions 11c, 11c. The protruding portion 11c located outside the member 6 is formed to be wider than the width of the notch portion 11 at the lower portion of the member 6 . That is, the width of the notch portion 11 becomes narrower from the protruding portion 11 c protruding outward of the member 6 to the lower portion of the member 6 .
[0052] Therefore, the groove-shaped concave portion 12 formed by the depression of the coating 5 also has a narrower width at the low...
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