JPS58184783A - Printed circuit board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] Printed wiring board KrIA board for configuring electric circuits for use in various equipment and devices such as electronic equipment 1 and communication equipment by mounting various electrical parts, especially through-yjt-kK instantaneous The present invention relates to a printed wiring board in which the wiring is in a zigzag pattern, with the wiring pattern being a curved pattern in the contacting portions or the portions where the wiring is close to each other, and the wiring pattern S in other portions being a straight pattern.

[Background technology]

In the conventional printed wiring board, as shown in Figure 1, there are 10 through-holes (through-hole dust) on the wiring board and 20 holes K1.
The wiring was performed by setting the 1l arrangement 113' in a grid pattern (wiring grid). Ktf'i, which increases the wiring capacity in this printed layout, FIG. 2(a).

(b) The wiring grid is increased as shown in K, but in this case, the crosstalk increases due to the proximity of the wiring 413,
There was a drawback that contact between the through-hole dust 2 or 11M3 occurred, impairing electrical characteristics and reliability.

[Disclosure of the invention]

The present invention eliminates the drawbacks of the conventional printed wiring board, and by making a detour around the through hole K11I and the adjacent wiring, or between adjacent wirings, and always keeping the distance between them above a certain level, the wiring 413 and the through hole Contact of seat 2, proximity 1w between seats 3, touch I! The purpose of the present invention is to disclose a printed wiring board which is designed to increase wiring capacity and improve reliability by preventing such problems.

[Explanation of Examples]

Figures 3(a), (b) and 6 show the entire wiring diagram of the printed wiring board before applying the present invention, and Figures 4, 5, 7, and 8 show the wiring diagram of the printed wiring board before applying the present invention. An example is shown.

In Figure 3, where the basic grid is vertical and horizontal wiring, 1
2 is a through-hole, 2 is a through-hole seat, and 3 is a wiring. A wiring grid capable of accommodating 4 wires (11k) is set between the through-holes (IC pins).

Among these, #i in Figure 3(a) is set so that the grid spacing near the through hole is sparse and the grid spacing in the center is denser than #i, and Figure 3(b) is set so that the grid spacing is equal. This is the setting. In Fig. 6:6□j, the basic lattice is an inclined wiring, and the lattice spacing is set precisely.

The setting of the stiff grid is done in consideration of crosstalk between wiring lines 3 and manufacturing yield. Further, the maximum number of wires between the through holes 1 can be increased within those allowable values.

However, when designing the wiring in such a grid setting state, when the wiring 41j3 on the grid adjacent to the through-hole 1 is formed in the through-hole seat 2, the through-pole seat 2 and the wiring 3
may come into contact and cause a short circuit phenomenon, or be in close proximity to each other and cause a crosstalk phenomenon.

Therefore, examples of trapezoidal, rectangular, and arcuate curve patterns shown in Figures 4 (a), (b), and (C), or Figure 7 (
a).

By applying the examples of trapezoidal, triangular, and arcuate curve patterns shown in (b) and (C),
A zigzag pattern arrangement S as shown in FIG. 8(a), Φ)K is performed. That is, in FIGS. 5(a) and 5(b), which are one example, in order to prevent the through-hole seat 2, arrangement 1 wire 3, and arrangement II 3 from coming into contact with each other or coming close to each other, Corresponding to the shape of the hole seat 2, a zigzag pattern is recorded by appropriately applying a curved pattern in a vertical and horizontal basic grid. In addition, 5F
It is a straight line pattern. In addition, in FIGS. 8(aL and 8(b)), which are other embodiments, the arrangement 14 of the n L tm II pattern is applied to the inclined basic lattice to form a zigzag shape corresponding to the shape of the through-hole seat 2. This is the pattern wiring.

〔Effect of the invention〕

The present invention makes the wiring pattern zigzag according to the shape of the through hole or the wiring density W, etc., and when there is a gap between the through hole seat and the wiring, by keeping the distance between the wiring and the wiring at a certain level or more, crosstalk can be prevented. Alternatively, it is possible to prevent short circuits, etc., and improve the richness characteristics and reliability. Further, the wiring capacity can be increased without causing any adverse effects.

[Brief explanation of drawings]

Figure 1g1 is a wiring diagram of a conventional printed wiring board, Figure 2 (a
), Φ) are the layout lII diagrams when the basic lattice is increased, 3rd
Figures (a) and (b) are wiring diagrams in which the basic lattice of pongee to which the present invention is applied is vertical and horizontal, and Figure 4 (a), Φ), and (C) t.
i! &Curve pattern diagrams in a vertical horizontal basic lattice, Figures 5 (al and 5) are examples of zigzag pattern wiring on a printed wiring board, and the 6th figure shows an example of the basic lattice with an inclined shape before applying the present invention aA. Wiring diagram, Figure 7 (ri, Φl, (
c) is a diagram of the curve pattern in the inclined basic lattice, Figure 8 (
a) and (b) are other examples of zigzag pattern wiring on a printed wiring board. 1...Null hole 2...Through hole seat 3
...Prize 4! l 4...Curve pattern 5...
Straight line pattern applicant NEC Corporation

Claims (1)

[Claims] The wiring Ia adjacent to the through hole is bent in a detour around the through hole in a shape corresponding to the shape of the through hole dust, and the wiring is arranged in a zigzag shape so that the distance between the through hole and the wiring is always maintained at a certain level or more. A printed wiring board characterized by a pattern.