JP2014175440A - Flexible printed wiring board and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible printed wiring board capable of easily determining whether an insertion confirmation mark is positioned within a print deviation tolerance, and a manufacturing method thereof.SOLUTION: An FPC 10 comprises: a flexible base film 11; a wiring pattern 12 formed on one side of the base film 11 and including a terminal part 12a to be inserted to a connector C at least at one end side; a reinforcing plate 14 disposed on another side of the base film 11 so as to oppose the terminal part 12a; and an insertion confirmation mark 15 printed on the reinforcing plate 14. The reinforcing plate 14 includes a flange part 14a of which the length in an insertion direction of the terminal part 12a is larger than at least a print deviation tolerance of the insertion confirmation mark 15 and in the flange part 14a, a print deviation confirmation mark 16 capable of visually determining whether the insertion confirmation mark 15 is positioned within the print deviation tolerance is printed simultaneously with the insertion confirmation mark 15.

Description

  The present invention relates to a flexible printed wiring board and a method for manufacturing the same.

  Conventionally, what is connected to a connector as a flexible printed circuit board (Flexible Printed Circuits; hereinafter referred to as FPC) is known. In such an FPC, there is a problem that an insufficient amount of insertion of the terminal portion to be inserted into the connector or a poor conduction between the terminal portion and the connector occurs when the insertion direction is inclined.

  On the other hand, in order to improve the rigidity of the terminal part, an insertion confirmation mark is printed on a reinforcing plate arranged opposite to the terminal part, and the terminal part is inserted into the connector in an appropriate amount and direction based on the insertion confirmation mark. There is a method of visually confirming whether or not it has been done (see Patent Documents 1 and 2).

JP 2000-252598 A JP 2009-32737 A

  Here, when the insertion confirmation mark is formed by printing, the position of the insertion confirmation mark may be deviated from the design appropriate position. If the insertion confirmation mark deviates more than the printing misalignment tolerance, it will not be possible to visually determine the amount of insertion, especially with respect to the insertion confirmation mark, so manufacture whether or not the position of the insertion confirmation mark is within the printing misalignment tolerance. It is necessary to check in the process.

  However, conventionally, it has been necessary to measure the positional deviation amount of the insertion confirmation mark to confirm whether it is within the printing deviation tolerance, and there is a problem that the confirmation work is complicated.

  Therefore, the present invention has been made in view of this problem, and provides a flexible printed wiring board that can easily determine whether or not the position of an insertion confirmation mark is within a printing misalignment tolerance and a method for manufacturing the same. Objective.

In order to solve the above-described problems, a flexible printed wiring board according to the present invention has a flexible substrate and a wiring pattern that is formed on one surface of the substrate and has a terminal portion that is inserted into a connector at least at one end side. And a flexible printed wiring board comprising a reinforcing plate disposed on the other surface of the substrate so as to face the terminal portion, and an insertion confirmation mark printed on the reinforcing plate,
The reinforcing plate includes a printed portion in which the length in the insertion direction of the terminal portion is at least larger than a printing deviation tolerance of the insertion confirmation mark,
A print misalignment check mark capable of visually determining whether or not the position of the insertion confirmation mark is within the print misalignment tolerance is printed at the same time as the insertion confirmation mark.

In order to solve the above-described problems, a method for manufacturing a flexible printed wiring board according to the present invention includes a flexible substrate and a terminal portion formed on one surface of the substrate and inserted into a connector at least on one end side. A flexible printed wiring board comprising: a wiring pattern having: a reinforcing plate disposed on the other surface of the substrate so as to face the terminal portion; and an insertion confirmation mark printed on the reinforcing plate. A method,
The reinforcing plate includes a printed portion in which the length in the insertion direction of the terminal portion is at least larger than a printing deviation tolerance of the insertion confirmation mark,
Simultaneously with the insertion confirmation mark, when the position of the insertion confirmation mark is within the printing deviation tolerance on the printed part, a printing deviation confirmation mark is provided so that a gap is provided between the printed part and the end of the printed part. Printing process;
And a step of visually judging whether or not the position of the insertion confirmation mark is within the printing misalignment tolerance based on the presence or absence of the gap.

  According to the present invention, it is possible to easily determine whether or not the position of the insertion confirmation mark is within the printing deviation tolerance by visual inspection.

Sectional drawing and rear view which show FPC which is embodiment of this invention. The rear view which shows the state by which FPC same as the above was connected to the connector. The principal part enlarged view which shows FPC same as the above. The principal part enlarged view explaining the confirmation method of the printing shift of FPC same as the above. The figure explaining the manufacturing process of FPC same as the above.

  Embodiments to which the present invention is applied will be described below with reference to the accompanying drawings.

1A and 1B show an FPC 10 according to an embodiment of the present invention. FIG. 1A is a cross-sectional view of the FPC 10 and FIG. 1B is a rear view of the FPC 10.
As shown in FIG. 1, the FPC 10 includes a base film 11, a wiring pattern 12, a cover lay 13, and a reinforcing plate 14.

  The base film 11 is made of an insulating material such as polyimide, and is a flexible sheet-like substrate.

  The wiring pattern 12 is made of a conductive foil such as a copper foil, for example, and is a conductive wiring formed on the surface of the base film 11 (the left surface in FIG. 1A) with a predetermined pattern. The wiring pattern 12 has a terminal portion 12 a that is at least one end exposed from the coverlay 13 and connected to the connector C.

  The coverlay 13 is made of an insulating material such as polyimide, and is a sheet-like member that covers and protects the wiring pattern 12.

  The reinforcing plate 14 is made of an insulating material such as polyimide, glass epoxy, or polyethylene terephthalate, and is fixed on the back surface of the base film (the right surface in FIG. 1A) with an adhesive or the like. The reinforcing plate 14 is disposed so that a part (the lower end portion in FIG. 1) faces the terminal portion 12a, and protrudes from a side portion perpendicular to the insertion direction of the FPC 10 indicated by an arrow in FIG. A flange portion (printed portion) 14a is extended. An insertion confirmation mark 15 is provided on the reinforcing plate 14, and a printing misalignment confirmation mark 16 is provided on the flange portion 14a. As shown in FIG. 3, the flange portion 14 a is provided so that its width (length in the insertion direction of the terminal portion 12 a) W <b> 1 is at least larger than the printing misalignment tolerance of the insertion confirmation mark 15. The printing deviation tolerance of the insertion confirmation mark 15 is a dimensional tolerance provided on the plus side and the minus side, respectively, with the length X from the end of the reinforcing plate 14 to the design position of the insertion confirmation mark 15 as a center (reference). Yes, for example, X ± t. In this case, the flange portion 14a has a width W1 that is a printing misalignment tolerance of the insertion confirmation mark 15, that is, a sum of a plus misalignment tolerance (= t) and a minus misalignment tolerance (= t) (= 2t). (W1> 2t). The reason why the width W1 of the flange portion 14a is defined in this way will be described in detail later.

  The insertion confirmation mark 15 is made of, for example, a white line, and is formed on the reinforcing plate 14 by printing such as silk printing. In the present embodiment, the insertion confirmation mark 15 is a mark for confirming the insertion amount of the terminal portion 12a. The insertion confirmation mark 15 is provided at a position hidden in the connector C when the terminal portion 12a is inserted with the correct insertion amount, and the insertion confirmation mark 15 cannot be visually observed after insertion of the terminal portion 12a as shown in FIG. It is possible to visually confirm that a correct insertion amount has been inserted. On the other hand, when the insertion confirmation mark 15 is visible after the insertion of the terminal portion 12a, it can be visually confirmed that the insertion is not performed with the correct insertion amount.

  The print misalignment confirmation mark 16 is made of, for example, a white line, and is printed on the flange portion 14 a simultaneously with the insertion confirmation mark 15. As shown in FIG. 3, the print misalignment confirmation mark 16 has a width (length in the insertion direction of the terminal portion 12a) W2 from the width W1 of the flange portion 14a to the printing tolerance of the insertion confirmation mark 15 (in this case, plus side printing). The length is formed by subtracting the sum of the tolerance and the negative printing tolerance (= 2t) (W2 = W1-2t). Further, the printing misalignment confirmation mark 16 is provided with a substantially central portion in the width direction of the flange portion 14a (insertion direction of the terminal portion 12a) as a design position. When the print misalignment confirmation mark 16 is provided in this manner, gaps (non-printed portions) S1 and S2 are provided between the design position of the print misalignment confirmation mark 16 and the end portions 14a1 and 14a2 in the width direction of the flange portion 14a. Will be formed. In this case, the length W3 of the gap S1 is substantially equal to the plus side printing deviation tolerance (W3 = t), and the length W4 of the gap S2 is substantially equal to the minus side printing deviation tolerance (W4 = t). Here, the positional deviation amount of the printing misalignment check mark 16 that is actually printed is equal to the positional deviation amount of the insertion confirmation mark 15 that is simultaneously printed. Therefore, when the position of the insertion confirmation mark 15 is within the printing deviation tolerance, the gap S1 is provided between the actual position of the printing deviation confirmation mark 16 and the end portions 14a1 and 14a2 in the width direction of the flange portion 14a. , S2 is formed, and when the position of the insertion confirmation mark 15 is out of the printing displacement tolerance, the actual position of the printing displacement confirmation mark 16 and the end portions 14a1, 14a2 in the width direction of the flange portion 14a One of the gaps S1 and S2 is not formed between them. Therefore, it is possible to visually determine whether or not the position of the insertion confirmation mark 15 is within the printing deviation tolerance by visually confirming the presence or absence of the gaps S1 and S2. FIG. 4 shows, as an example, a case where printing of the insertion confirmation mark 15 and the print misalignment confirmation mark 16 is shifted to the plus side (upper side in FIG. 4) from the designed position. In the case of FIG. 4A, since both gaps S1 and S2 are formed between the actual position of the print misalignment confirmation mark 16 and the end portions 14a1 and 14a2 in the width direction of the flange portion 14a, Although the positional deviation of the confirmation mark 15 occurs, it can be visually determined that it is within the printing deviation tolerance. On the other hand, in the case of FIG. 4B, the gap S1 is not formed between the actual position of the print misalignment confirmation mark 16 and the end 14a1 in the width direction of the flange portion 14a (further, the print misalignment confirmation mark). It can be visually determined that the positional deviation of the insertion confirmation mark 15 is outside the printing deviation tolerance. Similarly, when the insertion confirmation mark 15 and the printing are shifted to the minus side (lower side in FIG. 3), the actual position of the printing misalignment confirmation mark 16 and the end 14a2 in the width direction of the flange portion 14a It is possible to visually determine whether or not the positional deviation of the insertion confirmation mark 15 is within the printing deviation tolerance based on the presence or absence of the gap S2 between the two.

  Next, an example of a method for manufacturing the FPC 10 will be described.

(pre-process)
First, as a pre-process, as shown in FIG. 5A, a wiring pattern 12 is formed in a predetermined pattern on the surface of the base film 11 by a method such as etching, and the wiring pattern 12 is removed from the terminal portion 12a. The cover lay 13 is arranged and fixed on the surface of the base film 11 with an adhesive or the like so as to cover it. The terminal portion 12a is subjected to rust prevention treatment such as plating treatment.

(Reinforcing plate placement process)
Next, as a reinforcing plate disposing step, as shown in FIG. 5B, the reinforcing plate 14 having the flange 14a is wired on the base film 11 so that the terminal portions 12a of the respective wiring patterns 12 partially face each other. It arrange | positions and fixes via the adhesive agent etc. on the surface (back surface) on the opposite side to the surface in which the pattern 12 was formed.

(Mark printing process)
Next, as a mark printing process, as shown in FIG. 5C, an insertion confirmation mark 15 and a printing misalignment confirmation mark 16 are simultaneously printed on the reinforcing plate 14 and the flange portion 14a by silk printing.

(Outline removal process)
Next, as an outer shape punching step, unnecessary portions of the base film 11 are removed by punching and processed into a desired outer shape.

(Print displacement confirmation process)
Next, as a print misalignment confirmation step, the presence or absence of gaps S1 and S2 between the print misalignment confirmation mark 16 and the end portions 14a1 and 14a2 in the width direction of the flange portion 14a is visually confirmed, and the misalignment of the insertion confirmation mark 15 is confirmed. Is within the printing misalignment tolerance. In addition, the FPC 10 is obtained by conducting an energization inspection and an appearance inspection.

  The FPC 10 according to the present embodiment includes a flexible base film 11, a wiring pattern 12 having a terminal portion 12 a formed on one surface of the base film 11 and inserted into the connector C on at least one end side, and a base film 11 is a flexible printed wiring board comprising a reinforcing plate 14 disposed on the other surface of the substrate 11 so as to face the terminal portion 12a, and an insertion confirmation mark 15 printed on the reinforcing plate 14. 14 includes a flange portion 14a (printed portion) in which the length in the insertion direction of the terminal portion 12a is at least larger than the printing displacement tolerance of the insertion confirmation mark 15, and the position of the insertion confirmation mark 15 is positioned on the flange portion 14a. A printing misalignment confirmation mark 16 that can be visually judged whether or not it is within the tolerance is printed at the same time as the insertion confirmation mark 15.

  According to this, it is possible to easily determine whether or not the position of the insertion confirmation mark 15 is within the printing deviation tolerance based on the position of the printing deviation confirmation mark 16 in the flange portion 14a.

  Further, when the position of the insertion confirmation mark 15 is within the printing deviation tolerance, gaps S1 and S2 are provided between the end portions 14a1 and 14a2 of the flange portion 14a. And

  According to this, it is possible to easily determine whether or not the position of the insertion confirmation mark 15 is within the printing deviation tolerance based on the presence or absence of the gaps S1 and S2.

  In addition, the printed portion includes a flange portion 14a protruding from the reinforcing plate 14 perpendicular to the insertion direction of the terminal portion 12a.

  According to this, it is easy to visually check the printing misalignment confirmation mark 16 and the gaps S1 and S2, and it is possible to easily determine whether or not the position of the insertion confirmation mark 15 is within the printing misalignment tolerance.

  The manufacturing method of the FPC 10 according to the present embodiment includes a flexible base film 11, and a wiring pattern 12 having a terminal portion 12a formed on one surface of the base film 11 and inserted into the connector C at least on one end side. A method for manufacturing a flexible printed wiring board, comprising: a reinforcing plate 14 disposed on the other surface of the base film 11 so as to face the terminal portion 12a; and an insertion confirmation mark 15 printed on the reinforcing plate 14. The reinforcing plate 14 includes a portion to be printed (flange portion 14a) in which the length in the insertion direction of the terminal portion 12a is at least larger than the printing deviation tolerance of the insertion confirmation mark 15. When the position of the insertion confirmation mark 15 in the portion 14a is within the printing deviation tolerance, a gap S is formed between the end portions 14a1 and 14a2 of the flange portion 14a. , Printing the printing misalignment confirmation mark 16 so that S2 is provided, and visually judging whether the position of the insertion confirmation mark 15 is within the printing misalignment tolerance based on the presence or absence of the gaps S1 and S2. It is characterized by having.

  According to this, it is possible to easily determine whether or not the position of the insertion confirmation mark 15 is within the printing deviation tolerance based on the presence or absence of the gaps S1 and S2.

  The above description exemplifies the present invention, and it is needless to say that various changes and modifications (including deletion of components) are possible without departing from the scope of the invention. In the present embodiment, the printed portion is the flange portion 14a. However, a printed portion that is separated from other portions by a slit or the like may be provided on the flat plate portion. Moreover, although the insertion confirmation mark 15 is for confirming the amount of insertion of the terminal portion 12a, it may be for confirming the insertion direction. In addition, the confirmation of the insertion amount is based on whether or not the insertion confirmation mark 15 is invisible. However, the insertion confirmation method using the insertion confirmation mark 15 is arbitrary, and the insertion confirmation mark 15 and the connector C There may be a method of confirming that the amount of insertion is appropriate because there is no gap between them. Further, although the insertion confirmation mark 15 and the print misalignment confirmation mark 16 are in a line shape, they may have a figure shape such as a triangle, a quadrangle, or a circle. Further, although the printing deviation tolerance of the insertion confirmation mark 15 is set on the plus side and the minus side (both side tolerance), it may be set on either the plus side or the minus side. (One-sided tolerance). In that case, the print misalignment confirmation mark 16 may be formed with a width and a position so that only a gap corresponding to the side where the print misalignment tolerance is set is provided.

  The present invention is suitable for a flexible printed wiring board inserted into a connector and a manufacturing method thereof.

10 FPC
11 Base film (substrate)
12 Wiring pattern 13 Coverlay 14 Reinforcement plate 14a Flange part (printed part)
15 Insertion confirmation mark 16 Print misalignment confirmation mark

Claims (4)

A flexible substrate, a wiring pattern formed on one surface of the substrate and having a terminal portion to be inserted into the connector at least on one end side, and on the other surface of the substrate so as to face the terminal portion A flexible printed wiring board comprising: a reinforcing plate to be arranged; and an insertion confirmation mark printed on the reinforcing plate,
The reinforcing plate includes a printed portion in which the length in the insertion direction of the terminal portion is at least larger than a printing deviation tolerance of the insertion confirmation mark,
A flexible printed wiring, wherein a printing misalignment check mark capable of visually determining whether or not the position of the insertion confirmation mark is within the printing misalignment tolerance is printed at the same time as the insertion confirmation mark on the printed portion. Board.   2. The print misalignment check mark is provided with a gap between an end of the printed portion when the position of the insertion check mark is within the print misalignment tolerance. Flexible printed wiring board.   The flexible printed wiring board according to claim 1, wherein the printed portion includes a flange portion that protrudes perpendicularly to the insertion direction of the terminal portion from the reinforcing plate. A flexible substrate, a wiring pattern formed on one surface of the substrate and having a terminal portion to be inserted into the connector at least on one end side, and on the other surface of the substrate so as to face the terminal portion A method of manufacturing a flexible printed wiring board comprising: a reinforcing plate to be disposed; and an insertion confirmation mark printed on the reinforcing plate,
The reinforcing plate includes a printed portion in which the length in the insertion direction of the terminal portion is at least larger than a printing deviation tolerance of the insertion confirmation mark,
Simultaneously with the insertion confirmation mark, when the position of the insertion confirmation mark is within the printing deviation tolerance on the printed part, a printing deviation confirmation mark is provided so that a gap is provided between the printed part and the end of the printed part. Printing process;
And a step of visually judging whether or not the position of the insertion confirmation mark is within the printing misalignment tolerance based on the presence or absence of the gap.

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