JPH10256681A - Flexible printed wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible printed wiring board wherein a contact contacts all terminals with sure even when the heights of terminals formed on the surface of electric parts vary. SOLUTION: A plurality of contact 9 (9a, 9b,...) to contact a plurality of terminals 3 (3a, 3b,...) which, some of them different in height, are arrayed/ formed on the surface of an electric element 1 are arrayed/formed on a film substrate 8. Lengths of contacts are different such that the contact 9c corresponding to the tall terminal 3c contacts only by the tip part side of the terminal 3c while the contacts 9a, 9b, 9d,... corresponding to short terminals 3a, 3b, 3d,... contact by the root part side of the contacts 3a, 3b, 3d,....

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A contact formed on a surface of a flexible printed wiring board, called a so-called contact film, is brought into contact with terminals arranged at a fine pitch on the surface of the electric component to make contact with the electric component. When the film and the film are electrically connected, uniform contact may not be obtained due to variations in the thickness (that is, height) of the terminals and the contacts. For example, in an electric component, only some of a plurality of terminals formed on the surface may be formed thicker than other terminals. Also, in the contact film, as a result of the difference in the plating thickness formed on the surface due to the difference in the resistance value of each contact pattern,
The overall thickness or height of the contacts may vary.

[0002]

When adjacent terminals or adjacent contacts have different thicknesses (that is, heights), when a terminal on an electric component is brought into contact with a contact on a contact film, a high terminal is required. It is difficult to make contact with the corresponding contact or terminal at the location of the low terminal next to the contact or at the location of the low contact next to the high contact.

Accordingly, a first object of the present invention is to provide a flexible printed wiring that can reliably contact a contact to all terminals even if the height of terminals formed on the surface of an electric component varies. To provide a board.

It is a second object of the present invention to ensure that all contacts and terminals are in contact with each other even if there are variations in height of the contacts to be brought into contact with the terminals formed on the surface of the electric component. It is an object of the present invention to provide a flexible printed wiring board that can perform the above-mentioned steps.

[0005]

In order to achieve the first object, according to the present invention, a plurality of terminals which are arrayed on the surface of an electric component and partially different in height are brought into contact with each other. A flexible printed wiring board in which a plurality of contacts are formed on a film substrate in order to make contact with a high terminal only on its tip side and on a low terminal on its root side The contact is arranged as described above.

[0006] According to the above configuration, for a tall terminal, the corresponding contact contacts only the tip side of the terminal and does not contact the root side of the terminal. On the root side, the height of the film substrate can be reduced. Therefore, the lower terminal adjacent to the higher terminal and the corresponding contact on the film substrate can be reliably brought into contact with the base of the terminal.

According to a second aspect of the present invention, in the flexible printed wiring board according to the first aspect, the contact corresponding to the tall terminal extends from a tip end side of the terminal to a position short of a root of the terminal. The contact corresponding to the terminal having a low height extends so as to be able to contact over the entire section from the distal end to the root of the terminal.

According to a third aspect of the present invention, in the flexible printed wiring board according to the first aspect, the contact corresponding to the tall terminal extends from a tip end side of the terminal to a position short of a root portion, and A contact corresponding to the terminal having a low height extends from the base side of the terminal to a position short of the front end.

Further, in order to achieve the second object,
According to a fourth aspect of the present invention, there is provided a flexible printed wiring board in which a plurality of contacts having different heights are arranged and formed on a film substrate in correspondence with a plurality of terminals arranged and formed on a surface of an electric component. Among the tall contacts, at least the contact adjacent to the low contact is only at the tip side of the corresponding terminal, and the low contact is contact at the root side of the corresponding terminal. It is characterized by being arranged in.

According to the above configuration, at least the contact adjacent to the low contact of the high contact contacts the corresponding terminal only at the tip end side and contacts the corresponding terminal at the base end side of the terminal. Are not in contact with each other, so that the height of the film substrate can be reduced on the base side of the terminal corresponding to the short contact. Therefore, the low contact adjacent to the high contact and the terminal on the electric component corresponding thereto can be reliably brought into contact with the base of the terminal.

According to a fifth aspect of the present invention, there is provided the flexible printed wiring board according to the fourth aspect, wherein at least a contact adjacent to the low contact among the high contacts is a terminal corresponding to the contact. Extending from the distal end side of the terminal to a position just before the root of the terminal, and the low-height contact extends so as to be able to contact the entire area from the distal end to the root of the terminal corresponding to the contact. It is characterized by.

According to a sixth aspect of the present invention, in the flexible printed wiring board according to the fourth aspect, the contact having a high height extends from a front end side of the terminal corresponding to the contact to a position short of a root. In addition, the contact having a low height extends from the base side of the terminal corresponding to the contact to the front of the tip.

According to a seventh aspect of the present invention, there is provided a flexible print in which a plurality of contacts arranged on a surface of an electric component and arranged to be in contact with a plurality of terminals having partially different heights are arranged on a film substrate. In the wiring board, the plurality of contacts are arranged in a staggered manner so as to be in contact with only one of the high terminal or the low terminal only on the tip side and on the other side only on the base side. It is characterized by the following.

According to the above construction, one of the high and low terminals can be contacted only on the tip side and the other on the base side only. At the contact point between the low terminal and the contact, the two can be reliably contacted without being affected by the height determined by the contact between the high terminal and the contact.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

[0016]

1 and 2 illustrate a first embodiment of the present invention. 1A is a plan view of a main part showing an arrangement of electrode terminals on an insulating substrate of a liquid crystal display panel as an electric component, FIG. 1B is a side view of a main part of the liquid crystal display panel,
(C) is a perspective plan view showing the flexible printed wiring board of the comparative example viewed from the side where the contact 6 is not formed, that is, from the back side, and (d) is the flexible printed wiring board of the comparative example and a liquid crystal display panel. (E) is a perspective plan view showing a state in which the flexible printed wiring board of the first embodiment is viewed from the side where the contacts 9 are not formed, that is, from the back side, and (f) is a perspective view. (E) between the flexible printed wiring board of the first embodiment and the liquid crystal display panel
(G) is a cross-sectional view of the flexible printed wiring board and the liquid crystal display panel of the first embodiment along the line BB in (e). 1 (d),
In (e), since the contacts are formed on the bottom side (front side) of the flexible printed wiring board, they cannot be seen from the illustrated plane side. It is drawn with a solid line. FIG. 2A is a perspective view showing a state in which the flexible printed wiring board of the first embodiment is set on an elastic pressing member, and FIG. 2B is a state in which a liquid crystal display panel is further mounted thereon. FIG. 4 is a perspective view showing a state where the pressing is performed from above.

Referring to these drawings, a plurality of electrode terminals 3 (3a, 3b,...) Are formed at a fine pitch on the surface of an insulating substrate 2 of a liquid crystal display panel 1 which is an electric component. One of the plurality of electrode terminals 3 (3
c) is formed higher than the other electrode terminals 3 (3a, 3b, 3d,...).

On the other hand, in the flexible printed wiring board 4 of the comparative example shown in FIGS. 1C and 1D, the flexibility is corresponding to the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 6 of the same height on a film substrate 5 having
(6a, 6b,...) Are formed, and each contact 6
(6a, 6b, ...) are the electrode terminals 3 (3a, 3b, ...).
・ ・) Are arranged and formed at the same length from the tip side to the base. Therefore, in the flexible printed wiring board 4 of the comparative example, when the electrode terminal 3 is brought into contact with the contact 6, the contact 6c comes in contact from the tip to the root of the high electrode terminal 3c. As shown in FIG. 1 (d), the contacts 6b and 6d on the film substrate 5 float with respect to the low electrode terminals 3b and 3d adjacent to the high electrode terminal 3c, and thus the electrode terminals 3c and 3d are sufficiently lifted. Contact will not be possible.

On the other hand, in the flexible printed wiring board 7 of the first embodiment, as shown in FIGS. 1 (e) and 2 (a), it corresponds to the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 9 (9a, 9b,...) Having the same height are formed on the flexible film substrate 8, and the contacts 9c corresponding to the tall electrode terminals 3c are formed. Are arranged so as to be able to contact from the tip end side of the electrode terminal 3c to just before the root, whereas they correspond to the other lower electrode terminals 3 (3a, 3b, 3d,...). The contacts 9 (9a, 9b, 9d, ...) are connected to the electrode terminals 3a,
Are arranged so as to be able to contact over the entire section from the tip end side of 3b, 3d,. FIG. 2 (a),
As shown in (b), this flexible printed wiring board 7 is installed on an elastic pressing member 10 made of rubber or the like,
The liquid crystal display panel 1 is mounted thereon.

Therefore, in the flexible printed wiring board 7 of the first embodiment, behind the tip of the electrode terminal 3 (at the location indicated by the phantom line B in FIG. 2B) and behind the root of the electrode terminal 3. (The location indicated by the imaginary line A in FIG. 2B) is pressed by a pressing member (not shown).
Since the contact 9c corresponding to the tall electrode terminal 3c contacts only the tip of the electrode terminal 3c, as shown in FIG. Although the contacts 9b and 9d on the film substrate 5 float with respect to the low electrode terminals 3b and 3d adjacent to the terminal 3c, the contact 9c does not contact the base of the electrode terminal 3c. As shown in FIG. 1 (f), the height of the film substrate 8 can be reduced at the base of the tall electrode terminal 3c. Therefore, the electrode terminals 3b, 3d located next to the tall electrode terminal 3c and the corresponding contacts 9b, 9d on the film substrate 8 are connected to the electrode terminals 3b, 3d.
Can be surely brought into contact at the base portion side.

FIG. 3 and FIG. 4 illustrate a second embodiment of the present invention. 3A is a plan view of a main part showing an arrangement of electrode terminals on an insulating substrate of the liquid crystal display panel, FIG. 3B is a side view of a main part of the liquid crystal display panel, and FIG. 3C is a flexible printed wiring board of a comparative example (D) is a side view showing a state where the flexible printed wiring board of the comparative example and the liquid crystal display panel are overlapped, and (e) is a transparent plan view showing the flexible printed wiring board of the second embodiment. (F) is a cross-sectional view of the flexible printed wiring board and the liquid crystal display panel of the second embodiment, taken along line AA in (e), and (g) is a second view.
It is sectional drawing which followed the BB line in (e) of the flexible printed wiring board and liquid crystal display panel of an Example. FIG. 4 is a perspective view showing a state in which the flexible printed wiring board according to the second embodiment is installed on the elastic pressing member 10, and the contact portions on the 3a, 3c. Groups 9a, 9c... And contact groups 9b, 9 on the 3b, 3d side
A thin insulating film 20 is formed so as not to conduct with.

Referring to these figures, a plurality of electrode terminals 3 (3a, 3b,...) Are arranged at a fine pitch on the surface of an insulating substrate 2 of a liquid crystal display panel 1 which is an electric component. The even-numbered electrode terminals 3b, 3d,... From the left of the plurality of electrode terminals 3 are formed higher than the odd-numbered electrode terminals 3a, 3c,.

On the other hand, in the flexible printed wiring board 4 of the comparative example shown in FIGS. 3C and 3D, the flexibility is increased corresponding to the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 6 of the same height on a film substrate 5 having
(6a, 6b,...) Are formed. The even-numbered contacts 6b, 6d,... From the left are formed so as to be able to contact over the entire section from the tip end side of the electrode terminal 3 to the base, and the odd-numbered contacts 6a, 6c,.・ ・
Are formed so as to be able to contact over the entire section from the base portion side to the tip end portion of the electrode terminal 3. Therefore, in the flexible printed wiring board 4 of the comparative example, when the electrode terminals 3 and the contacts 6 are brought into contact with each other, the contacts 6b extend from the tips of the tall electrode terminals 3b, 3d,. , 6d,... Are in contact with each other, and as shown in FIG. 3D, the high electrode terminals 3b, 3d,. , The contacts 6 a, 6 c,... On the film substrate 5 float, and cannot contact sufficiently.

On the other hand, in the flexible printed wiring board 7 of the second embodiment, as shown in FIG. 3E, the flexibility is increased in accordance with the arrangement of the electrode terminals 3 (3a, 3b,...). Contacts 9 of the same height on a film substrate 8 having
(9a, 9b,...) Are formed, and even-numbered contacts 9b, 9d,... From the left corresponding to the tall electrode terminals 3b, 3d,. , 3d,
Are arranged so as to be able to contact from the front end side to the front of the base part, whereas the contacts 9a, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, 9c, ...・
Are arranged and formed so as to be able to contact from the base side of the electrode terminals 3a, 3c,. The contact 9a on the left end and the contact 9h on the right end are connected to the signal input units 12, 13 via the leads 11, 11, respectively.

Therefore, in the flexible printed wiring board 7 according to the second embodiment, when the back of the tip of the electrode terminal 3 and the back of the base of the electrode terminal 3 are pressed by pressing members (not shown), the height is high. Electrode terminal 3
The contacts 9b, 9d,... corresponding to b, 3d,.
Are in contact with only the tips of the electrode terminals 3b, 3d,..., As shown in FIG.
The electrode terminals 3b, 3 having a high height on the tip side of d,.
d,... adjacent low electrode terminals 3a, 3c,
, The contacts 9a, 9c,
Are floating, but the contacts 9b, 9d,... Do not contact the bases of the electrode terminals 3b, 3d,. High electrode terminal 3
The height of the film substrate 8 can be reduced at the roots of b, 3d,. Therefore, the electrode terminals 3a, 3d located next to the tall electrode terminals 3b, 3d,.
and the corresponding contacts 9a, 9c,... on the film substrate 8 are connected to the electrode terminals 3a, 3c,.
Can be surely brought into contact at the base portion side.

In this embodiment, the tall electrode terminal is in contact with the tip end, and the low electrode terminal is in contact with the base portion.
If a predetermined distance can be secured between the electrode terminal and the electrode terminal, the electrode terminal with the higher height contacts the base side and the electrode terminal with the lower height contacts the tip side. It is also possible.

FIGS. 5A and 5B illustrate a third embodiment of the present invention. FIG. 5A is a plan view of an essential part showing an arrangement of electrode terminals on an insulating substrate of a liquid crystal display panel, and FIG. FIG. 4C is a perspective plan view showing a flexible printed wiring board of a comparative example, and FIG. 5D is a side view showing a state where the flexible printed wiring board of the comparative example and the liquid crystal display panel are overlaid. FIG. 7E is a perspective plan view showing the flexible printed wiring board of the third embodiment, and FIG. 7F is a view of the flexible printed wiring board of the third embodiment and the liquid crystal display panel taken along line AA in FIG. (G) is a cross-sectional view of the flexible printed wiring board and the liquid crystal display panel of the third embodiment, taken along line BB in (e).

In the third embodiment, FIG.
As shown in (b), the liquid crystal display panel 1 which is an electric component
A plurality of electrode terminals 3 (3a, 3a)
are arranged at a fine pitch, and one (3c) of the plurality of electrode terminals 3 is higher than the other electrode terminals 3 (3a, 3b, 3d,...). Is formed.

On the other hand, in the flexible printed wiring board 4 of the comparative example shown in FIGS. 5C and 5D, the flexibility is increased in accordance with the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 6 of the same height on a film substrate 5 having
(6a, 6b,...) Are formed, and each contact 6
(6a, 6b, ...) are the electrode terminals 3 (3a, 3b, ...).
・ ・) Is arranged so as to be able to contact from the tip side to the base. Therefore, in the flexible printed wiring board 4 of the comparative example, when the electrode terminal 3 is brought into contact with the contact 6, the contact 6c comes in contact from the tip to the root of the high electrode terminal 3c. As shown in FIG. 5 (d), the contacts 6b and 6d on the film substrate 5 float with respect to the low electrode terminals 3b and 3d adjacent to the high electrode terminal 3c. Contact will not be possible.

On the other hand, in the flexible printed wiring board 7 of the third embodiment, as shown in FIG. 5E, the flexibility is increased in accordance with the arrangement of the electrode terminals 3 (3a, 3b,...). Contacts 9 of the same height on a film substrate 8 having
(9a, 9b,...) Are formed, and the contact 9c corresponding to the tall electrode terminal 3c is
Of the other electrode terminals 3 (3a, 3a,
3b, 3d,...).
, 9d, ...) are the electrode terminals 3a, 3b, 3d,
Are arranged so as to be able to contact over the entire section from the tip end side to the root.

Therefore, in the flexible printed wiring board 7 of the third embodiment, when the back of the tip of the electrode terminal 3 and the back of the root of the electrode terminal 3 are pressed by pressing members (not shown), the height is high. Electrode terminal 3
Since the contact 9c corresponding to the contact c contacts only the tip of the electrode terminal 3c, as shown in FIG.
On the tip end side, the contacts 9b and 9d on the film substrate 5 float with respect to the low electrode terminals 3b and 3d adjacent to the high electrode terminal 3c. 5 (f), the height of the film substrate 8 can be reduced at the base of the tall electrode terminal 3c, as shown in FIG. 5 (f). Therefore,
An electrode terminal 3b located next to the tall electrode terminal 3c,
3d and their corresponding contacts 9 on the film substrate 8
b, 9d can be reliably brought into contact with the bases of the electrode terminals 3b, 3d.

Further, in the configuration of the third embodiment, the contacts 9d, 9e,... On the right side of the contact in FIG. Are arranged alternately in a staggered manner from the side and from the base side, and are substantially symmetrical with respect to the lead portions 14,
15 and 16, the contacts 9d, 9e,
When the plating layer is formed on the pattern surface, the resistance value of each pattern can be substantially equalized. As a result,
The thickness of the plating layer on each pattern is made uniform to make the contacts 9d, 9
The height variations of e,... can be reduced.

FIGS. 6A and 6B illustrate a fourth embodiment of the present invention. FIG. 6A is a plan view of a main part showing an arrangement of electrode terminals on an insulating substrate of a liquid crystal display panel, and FIG. FIG. 4C is a perspective plan view showing a flexible printed wiring board of a comparative example, and FIG. 5D is a side view showing a state where the flexible printed wiring board of the comparative example and the liquid crystal display panel are overlaid. FIG. 7E is a perspective plan view showing the flexible printed wiring board of the fourth embodiment, and FIG. 7F is a view of the flexible printed wiring board of the fourth embodiment and the liquid crystal display panel taken along line AA in FIG. (G) is a cross-sectional view taken along line BB in (e) of the flexible printed wiring board of the fourth embodiment and the liquid crystal display panel, and (h) is a flexible printed wiring board of the fourth embodiment. And the liquid crystal display panel along the line CC in (e). It is a surface view.

In the fourth embodiment, FIG.
As shown in (b), the liquid crystal display panel 1 which is an electric component
A plurality of electrode terminals 3 (3a, 3a)
,...) are arranged at a fine pitch, one (3c) of the plurality of electrode terminals 3 is formed highest, and the electrode terminal 3d on the right side in FIG. Are formed at an intermediate height higher than the electrode terminals 3a, 3b, 3e,..., So that the electrode terminals 3 (3a, 3b,.
・) Height varies in three stages.

On the other hand, in the flexible printed wiring board 4 of the comparative example shown in FIGS. 6C and 6D, the flexibility is increased corresponding to the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 6 of the same height on a film substrate 5 having
(6a, 6b,...) Are formed, and each contact 6
(6a, 6b, ...) are the electrode terminals 3 (3a, 3b, ...).
・ ・) Is arranged so as to be able to contact from the tip side to the base. Therefore, in the flexible printed wiring board 4 of the comparative example, when the electrode terminal 3 is brought into contact with the contact 6, the contact 6 c comes into contact from the tip of the electrode terminal 3 c having the highest height to the base. As shown in FIG. 6D, the contact 6b on the film substrate 5 is provided to the electrode terminal 3b on the left of the electrode terminal 3c having the highest height.
Completely floats, and the contact terminals 6d and 6d on the film substrate 5 are connected to the electrode terminal 3d of the intermediate height on the right side of the electrode terminal 3c having the highest height and the electrode terminal 3e on the right side thereof. 6e floats and cannot be sufficiently contacted.

On the other hand, in the flexible printed wiring board 7 of the fourth embodiment, as shown in FIG. 6E, the flexibility is increased in accordance with the arrangement of the electrode terminals 3 (3a, 3b,...). Contacts 9 of the same height on a film substrate 8 having
(9a, 9b,...) Are formed, but the contact 9d corresponding to the intermediate-height electrode terminal 3d is
The contact 9c corresponding to the electrode terminal 3c having the highest height is shorter than the contact 9d, and the contact 9c corresponding to the electrode terminal 3c having the highest height is arranged from the tip end side of the electrode terminal 3c to the intermediate portion. Is formed so as to be able to contact up to just before.
Then, the remaining electrode terminals 3a, 3b, 3e,
The contacts 9a, 9b, 9e, ... corresponding to ...
The electrode terminals 3a, 3b, 3e,... Are formed so as to be able to contact over the entire section from the tip end side to the base.

Therefore, in the flexible printed wiring board 7 according to the fourth embodiment, when the back of the tip of the electrode terminal 3, the back of the middle part, and the back of the base are respectively pressed by pressing members (not shown), Since the contact 9c corresponding to the highest electrode terminal 3c contacts only the tip end side of the electrode terminal 3c, the contact 9d corresponding to the intermediate-height electrode terminal 3d is placed at an intermediate position of the electrode terminal 3c. It is possible to reliably contact the intermediate portion of the terminal 3d.
Also, the contact 9d corresponding to the electrode terminal 3d of the intermediate height contacts only the intermediate portion of the electrode terminal 3d,
d does not come into contact with the root side, so that the remaining electrode terminals 3
a, 3b, 3e,... corresponding to contacts 9a, 9b,.
.. Can be reliably brought into contact with the roots of the electrode terminals 3a, 3b, 3e,.

FIGS. 7A and 7B illustrate a fifth embodiment of the present invention. FIG. 7A is a main part plan view showing an arrangement of electrode terminals on an insulating substrate of a liquid crystal display panel, and FIG. (C) is a side view showing a flexible printed wiring board of a comparative example, (d) is a perspective plan view showing a flexible printed wiring board of a comparative example, and (e) is a perspective view of the comparative example. A side view showing a state in which the flexible printed wiring board and the liquid crystal display panel are superimposed, (f) is a perspective plan view showing the flexible printed wiring board of the fifth embodiment, and (g) is a flexible printed wiring board of the fifth embodiment. (H) is a cross-sectional view of the liquid crystal display panel and the liquid crystal display panel, taken along line AA in (f), and (h) is a line of BB in (f) of the flexible printed wiring board and liquid crystal display panel of the fifth embodiment. It is sectional drawing.

In the fifth embodiment, FIG.
As shown in (b), the liquid crystal display panel 1 which is an electric component
A plurality of electrode terminals 3 (3a, 3a)
are arranged at a fine pitch, and the plurality of electrode terminals 3 (3a, 3b,...) are all formed at the same height.

On the other hand, in the flexible printed wiring board 4 of the comparative example shown in FIGS. 7C and 7D, the flexibility is increased in accordance with the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 6 (6a, 6b,...) Having partially different heights are formed on a film substrate 5 having the respective terminals 6 (6a, 6b,...). 3a, 3
b,...) are formed so as to be able to contact over the entire section from the tip end side to the root part. More specifically, in this comparative example, the three contacts 6a, 6
are formed higher than the other contacts 6d, 6e,... Therefore, in the flexible printed wiring board 4 of the comparative example, when the flexible printed wiring board 4 and the liquid crystal display panel 1 are overlapped, the tall contacts 6a, 6b, 6c are connected to the corresponding electrode terminals 3 respectively.
As shown in FIG. 7 (e), the lower contact 6d adjacent to the higher contact 6c is connected to the corresponding lower electrode 6d as shown in FIG. The terminal floats from the terminal 3d and cannot be sufficiently contacted.

On the other hand, in the flexible printed wiring board 7 of the fifth embodiment, as shown in FIG. 7F, the flexibility is increased in accordance with the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 9 (9a, 9b,...) Having partially different heights are formed on a film substrate 8 having three contacts 9a, 9b, 9c from the left in the figure. 9d,
Are higher than 9e,..., But among the three tall contacts 9a, 9b, 9c, at least the contact 9c adjacent to the low contact 9d is the corresponding electrode terminal 3c. Are arranged so as to be able to contact from the front end side to the front of the base, and the remaining contacts 9a, 9b, 9d,.
Are arranged so as to be able to contact over the entire section from the tip end side of the corresponding electrode terminals 3a, 3b, 3d,.

Therefore, in the flexible printed wiring board 7 of the fifth embodiment, when the back of the tip of the electrode terminal 3 and the back of the root of the electrode terminal 3 are pressed by pressing members (not shown), the height is high. Among the three contacts 9a, 9b, 9c, the contact 9c adjacent to the low contact 9d contacts only the tip end side of the corresponding electrode terminal 3c, as shown in FIG. Electrode terminal 3
On the tip end side, a low contact 9d on the right of the high contact 9c floats from the corresponding electrode terminal 3d, but the contact 9c does not contact the base of the electrode terminal 3c. As shown in FIG. 7 (g), the height of the film substrate 8 can be reduced on the base side of the tall electrode terminal 3c. Therefore, the low electrode terminal 3d located adjacent to the high electrode terminal 3c and the corresponding contact 9d on the film substrate 8 can be surely brought into contact with the base of the electrode terminal 3d.

FIGS. 8A and 8B illustrate a sixth embodiment of the present invention. FIG. 8A is a plan view of a main part showing an arrangement of electrode terminals on an insulating substrate of a liquid crystal display panel, and FIG. (C) is a side view showing a flexible printed wiring board of a comparative example, (d) is a perspective plan view showing a flexible printed wiring board of a comparative example, and (e) is a perspective view of the comparative example. A side view showing a state in which the flexible printed wiring board and the liquid crystal display panel are overlapped, (f) is a transparent plan view showing the flexible printed wiring board of the sixth embodiment, and (g) is a flexible printed wiring board of the sixth embodiment. (H) is a cross-sectional view of the liquid crystal display panel and the liquid crystal display panel, taken along line AA in (f), and (h) is a line of BB in (f) of the flexible printed wiring board and liquid crystal display panel of the sixth embodiment. It is sectional drawing.

In the sixth embodiment, FIG.
As shown in (b), the liquid crystal display panel 1 which is an electric component
A plurality of electrode terminals 3 (3a, 3a)
are arranged at a fine pitch, and the plurality of electrode terminals 3 (3a, 3b,...) are all formed at the same height.

On the other hand, in the flexible printed wiring board 4 of the comparative example shown in FIGS. 8C and 8D, the flexibility is corresponding to the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 6 (6a, 6b,...) Having different heights are alternately formed on the film substrate 5 having the electrode terminals 3 (6a, 6b,...). 3a, 3
b,...) are arranged in a staggered manner so as to be able to contact over the entire section from the tip end side to the root. More specifically, in this comparative example, even-numbered contacts 6b, 6d, 6f,...
6c, 6e,... Are formed higher. Therefore, in the flexible printed wiring board 4 of the comparative example, when the electrode terminal 3 is brought into contact with the contact 6, the high contacts 6b, 6d, 6f,... Correspond to the corresponding electrode terminals 3b. , 3d, 3f,... Are in contact over the entire section from the tip end to the base, and as shown in FIG. 8 (e), the low-height contacts 6a, 6c, 6e,. Are lifted off from the electrode terminals 3a, 3c, 3e,... Corresponding to.

On the other hand, in the flexible printed wiring board 7 of the sixth embodiment, as shown in FIG. 8 (f), the flexibility is increased in accordance with the arrangement of the electrode terminals 3 (3a, 3b,...). A plurality of contacts 9 (9a, 9b,...) Having different heights are alternately formed on the film substrate 8 having the same number, and the even-numbered contacts 9b, 9d, 9f,. Are formed higher than the odd-numbered contacts 9a, 9c, 9e,..., But the contacts 9b, 9d, 9f,
... extend from the front end side of the corresponding electrode terminals 3b, 3d, 3f,.
The low contacts 9a, 9c, 9e,... Extend from the roots of the corresponding electrode terminals 3a, 3c, 3e,.

Therefore, in the flexible printed wiring board 7 of the sixth embodiment, when the back of the tip of the electrode terminal 3 and the back of the base of the electrode terminal 3 are pressed by pressing members (not shown), the height is high. Contact 9
.. b, 9d, 9f,...
7b, 3d, 3f,..., and only the tips 9a, 9c, 9e,. .. Float from the corresponding electrode terminals 3a, 3c, 9e,..., But have high contacts 9b, 9d, 9f,.
Are not in contact with the bases of the corresponding electrode terminals 3b, 3d, 3f,..., And as shown in FIG. 9a,
9c, 9e,... Correspond to the respective electrode terminals 3a, 3
.. can be reliably brought into contact at the root side of c, 3e,.

Although the illustrated embodiment has been described above, the present invention is not limited to only the above embodiment.
For example, the height variation of the electrode terminals and the contacts, the arrangement shape and the number of the contacts, and the like can be variously changed as necessary. Further, the present invention is not limited to a flexible printed circuit board for the purpose of electrical connection by contact with a liquid crystal display panel, but may be formed by contact with other electric components having terminals arranged and formed at a narrow pitch on the outer surface. The present invention can be similarly applied to a flexible printed wiring board for electrical connection.

[0049]

As is clear from the above description, according to the present invention, even if the heights of the terminals formed on the surface of the electric component vary, the contacts can reliably contact all the terminals. The flexible printed wiring board which can be provided.

Further, according to the present invention, even if the contacts to be brought into contact with the terminals formed on the surface of the electric component have a variation in height, a flexible print which can surely make all the contacts and terminals come into contact with each other. A wiring board can be provided.

[Brief description of the drawings]

1A is a plan view of a main part showing an example of an electrode terminal arrangement on an insulating substrate of a liquid crystal display panel as an electric component, FIG. 1B is a side view of a main part of the liquid crystal display panel, and FIG. FIG. 4D is a plan view showing a flexible printed wiring board of an example, FIG. 4D is a side view showing a state where the flexible printed wiring board of the comparative example and a liquid crystal display panel are overlapped, and FIG. 4E shows a first embodiment of the present invention. FIG. 4F is a plan view of the flexible printed wiring board, FIG. 4F is a cross-sectional view of the flexible printed wiring board of the first embodiment and the liquid crystal display panel taken along line AA in FIG.
It is sectional drawing which followed the BB line in (e) of the flexible printed wiring board and liquid crystal display panel of an Example.

FIG. 2A is a perspective view showing a state in which the flexible printed wiring board of the first embodiment is set on an elastic pressing member;
(B) is a perspective view showing a state where the liquid crystal display panel is further placed thereon and pressed from above.

3A is a plan view of a main part showing an example of an electrode terminal arrangement on an insulating substrate of a liquid crystal display panel, FIG. 3B is a side view of a main part of the liquid crystal display panel, and FIG. FIG. 4D is a plan view showing a wiring board, FIG. 5D is a side view showing a state in which the flexible printed wiring board of the comparative example and a liquid crystal display panel are overlapped, and FIG. 5E is a flexible printed wiring board showing a second embodiment of the present invention. (F) is a cross-sectional view of the flexible printed wiring board of the second embodiment and the liquid crystal display panel along line AA in (e), and (g) is a flexible printed wiring board of the second embodiment. B in (e) between the display and the liquid crystal display panel
It is sectional drawing which followed the -B line.

FIG. 4 is a perspective view showing a state in which a flexible printed wiring board according to a second embodiment is installed on an elastic pressing member.

5A is a plan view of a main part showing an example of electrode terminal arrangement on an insulating substrate of a liquid crystal display panel, FIG. 5B is a side view of a main part of the liquid crystal display panel, and FIG. FIG. 3D is a plan view showing a wiring board, FIG. 4D is a side view showing a state in which the flexible printed wiring board of the comparative example and the liquid crystal display panel are overlapped, and FIG. 4E is a flexible printed wiring board showing a third embodiment of the present invention. (F) is a cross-sectional view of the flexible printed wiring board of the third embodiment and the liquid crystal display panel along line AA in (e), and (g) is a flexible printed wiring board of the third embodiment. B in (e) between the display and the liquid crystal display panel
It is sectional drawing which followed the -B line.

6A is a plan view of a main part showing an example of electrode terminal arrangement on an insulating substrate of a liquid crystal display panel, FIG. 6B is a side view of a main part of the liquid crystal display panel, and FIG. FIG. 4D is a plan view showing the wiring board, FIG. 5D is a side view showing a state where the flexible printed wiring board of the comparative example and the liquid crystal display panel are overlapped, and FIG. 5E is a flexible printed wiring board showing a fourth embodiment of the present invention. (F) is a cross-sectional view of the flexible printed wiring board of the fourth embodiment and the liquid crystal display panel along line AA in (e), and (g) is a flexible printed wiring board of the fourth embodiment. B in (e) between the display and the liquid crystal display panel
(H) is a cross-sectional view along the line B, (h) is a cross-sectional view of the flexible printed wiring board and the liquid crystal display panel of the fourth embodiment in (e).
It is sectional drawing which followed the C line.

7A is a plan view of a main part showing an example of an electrode terminal arrangement on an insulating substrate of a liquid crystal display panel, FIG. 7B is a side view of a main part of the liquid crystal display panel, and FIG. FIG. 9D is a plan view showing a wiring board, FIG. 10D is a side view showing a state in which the flexible printed wiring board of the comparative example and the liquid crystal display panel are overlapped, and FIG. 10E is a flexible printed wiring board showing a fifth embodiment of the present invention. (F) is a cross-sectional view of the flexible printed wiring board of the fifth embodiment and the liquid crystal display panel along line AA in (e), and (g) is a flexible printed wiring board of the fifth embodiment. B in (e) between the display and the liquid crystal display panel
It is sectional drawing which followed the -B line.

8A is a plan view of a main part showing an example of an electrode terminal arrangement on an insulating substrate of a liquid crystal display panel, FIG. 8B is a side view of a main part of the liquid crystal display panel, and FIG. (D) is a plan view showing a flexible printed wiring board of a comparative example, (e) is a side view showing a state where the flexible printed wiring board of the comparative example and a liquid crystal display panel are overlaid, (f) is a plan view of a flexible printed wiring board showing a sixth embodiment of the present invention, and (g) is a view of the flexible printed wiring board of the sixth embodiment and a liquid crystal display panel along line AA in (f). FIG. 13H is a cross-sectional view of the flexible printed wiring board and the liquid crystal display panel of the sixth embodiment along the line BB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel (electric part) 2 Insulating board 3 (3a, 3b, ...) Electrode terminal 7 Flexible printed wiring board 8 Film board 9 (9a, 9b, ...) Contact 10, 11, 14, 15 , 16 Lead part 12, 13 Signal input part

Claims (7)

[Claims] 1. A flexible printed wiring board having a plurality of contacts arranged on a film substrate and arranged on a film substrate, the plurality of contacts being arranged on a surface of an electric component and making contact with a plurality of terminals having partially different heights. A flexible printed wiring board, wherein the contacts are arranged so as to be in contact with a high terminal only on a tip side thereof and on a low height terminal on a base side thereof. 2. A contact corresponding to a terminal having a high height extends from a front end side of the terminal to a position short of a base of the terminal, and a contact corresponding to a terminal having a low height is provided at a terminal end of the terminal. The flexible printed wiring board according to claim 1, wherein the flexible printed wiring board extends so as to be able to contact over the entire section from the base to the base. 3. A contact corresponding to a terminal having a high height extends from a tip end side of the terminal to a position short of a base portion, and a contact corresponding to a terminal having a low height is provided from a base portion side of the terminal. 2. The flexible printed wiring board according to claim 1, wherein the flexible printed wiring board extends to a position short of a front end. 4. A flexible printed wiring board in which a plurality of contacts having different heights are arranged on a film substrate corresponding to a plurality of terminals arranged on a surface of an electric component. Among the contacts, at least the contacts adjacent to the low-height contacts are located only at the tip end side of the corresponding terminal, and the low-height contacts are arranged so as to be able to contact at the root side of the corresponding terminal. A flexible printed wiring board characterized by the above. 5. A contact adjacent to at least the low contact of the high contacts extends from a tip end side of the terminal corresponding to the contact to a position short of a root of the terminal, 5. The flexible printed wiring board according to claim 4, wherein the contact having a low height extends so as to be able to contact over the entire section from the distal end side of the terminal corresponding to the contact to the root. 6. A contact having a high height extends from a tip end side of a terminal corresponding to the contact to a position short of a root portion, and a contact having a low height is provided on a terminal corresponding to the contact. 5. The flexible printed wiring board according to claim 4, wherein the flexible printed wiring board extends from a root portion side to a position short of a front end portion. 7. A flexible printed wiring board in which a plurality of contacts arranged on a surface of an electric component and arranged to be in contact with a plurality of terminals partially different in height are arranged on a film substrate. The plurality of contacts are arranged in a zigzag pattern so as to make contact with one of the high terminal or the low terminal only at the tip end side and with the other only at the base portion side. Printed wiring board.