JP2002334736A - Terminal part of high density substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal part wherein a terminal forming area is narrowed without lowering reliability of connection, in a high density substrate having many terminals required for connection to outside circuits. SOLUTION: A terminal 2 takes the form of a trapezoid, and the terminal part 1 is formed by alternately disposing the long sides and the short sides of the trapezoids on the connecting side for a leader line 4. At this time, the widely formed parts of the terminals 2 are provided so as to form a zigzag shape, and the wide parts provided in the zigzag shape are used for connection to outside circuits as contact areas 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an arrangement of terminals of a high-density substrate having a large number of terminals that need to be connected to an external circuit, such as a liquid crystal display device having a large number of electrode terminals that need to be connected to an external drive circuit. The present invention relates to a formed terminal portion.

[0002]

2. Description of the Related Art A liquid crystal display element is constituted by enclosing a liquid crystal material between two transparent substrates having transparent electrodes and the like formed on opposing surfaces, and electrode terminals formed around one of the transparent substrates. It is driven by connecting an external drive circuit to the unit and applying a voltage. 2. Description of the Related Art In recent liquid crystal display elements, with the demand for smaller devices, larger screen sizes (display areas), and an increase in the number of display pixels, there is a tendency that the terminal formation area is reduced and the number of terminals is increased.

FIGS. 2A and 2B show a conventional liquid crystal display device disclosed in Japanese Patent Application Laid-Open No. Sho 60-39617. FIG. 2A is a schematic sectional view, and FIG. 2B is a plan view showing a terminal portion. In the figure, reference numeral 10 denotes two transparent substrates constituting a liquid crystal display element,
A liquid crystal material is sandwiched between them. 11 is a terminal portion in which the terminals 12 are arranged in two rows, 13 is a contact region of the terminal 12, 14 is a lead wire connected to the terminal 12,
h is the length of the terminal 12, j is the length of the formation area of the terminal 12 arranged in two rows of the terminal portion 11, and k is the lead wire 14.
There is a pitch. In the terminal portion 11 of the conventional liquid crystal display element shown in FIG. 2, the terminals 12 connected to the adjacent lead lines 14 are alternately arranged in the first column and the second column, so that the terminals 12 adjacent to each other in the same column are arranged. The pitch has been increased.

[0004]

The terminal portions 11 in the conventional liquid crystal display element are constructed as described above. When the terminals 12 are arranged in two rows in a staggered manner, the pitch between adjacent terminals 12 is increased. However, it is necessary to increase the length j of the terminal portion 11 in order to arrange the terminals 12 in two rows, and there is a problem that the terminal formation region cannot be narrowed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made in consideration of the above problem. In a high-density substrate having a large number of terminals which need to be connected to an external circuit, the terminal formation can be performed without deteriorating connection reliability. It is an object of the present invention to obtain a terminal portion having a reduced area.

[0006]

A terminal portion of a high-density substrate according to the present invention is provided with a large number of terminals which need to be connected to an external circuit. Are arranged such that long sides and short sides of a trapezoid which are parallel to each other are alternately arranged on a connection side, and a wide portion of a terminal is used for connection to an external circuit.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a terminal portion of a high-density substrate according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a terminal portion formed by arranging a large number of terminals on a high-density substrate according to Embodiment 1 of the present invention. In the drawing, reference numeral 1 denotes a terminal portion in which terminals 2 having a trapezoidal shape are arranged and formed, 3 denotes a contact region of the terminal 2, and 4 denotes a lead wire connected to the terminal 2. a
Is the length of the formation area of the terminal 2, that is, the trapezoidal terminal 2
, B is the length of half of the short side of the pair of sides forming the parallel of the trapezoidal terminal 2, c is the long side of the pair of sides forming the parallel of the trapezoidal terminal 2 , E is the pitch of the lead wire 4, and f is the interval between the terminals 1.

[0008] Terminal portion 1 of high-density substrate according to the present embodiment
Is formed by alternately arranging long sides and short sides of a trapezoidal terminal 2 on a connection side with a lead wire 4 on a trapezoidal shape. By alternately arranging the long sides and the short sides of the trapezoidal terminals 2, the portions where the terminals 2 are formed to be wide are provided in a staggered manner. The wide portion provided in a staggered manner is used as a contact region 3 for connection to an external circuit.

Next, a specific example will be described. For example, the pitch k of the lead wire 14 in the conventional example shown in FIG.
5 μm, the length j of the formation region of the terminals 12 arranged in two rows is 100 μm, and the terminals 1 arranged in two rows are
Assuming that the contact region 13 has a circular shape in consideration of the short circuit between the two and the contact region 13 is circular, the length h of the terminal 12 is 47.5 microns and the diameter of the contact region 13 is 47.5 microns. . On the other hand, in the present embodiment shown in FIG. 1, the pitch e of the lead wire 4 is 65 microns, the length of the formation region of the terminal 2, that is, the height a of the trapezoidal terminal 2 is 100 microns, and a pair of parallel The length b of the short side of the side is 20 microns, the length c of the long side of the pair of parallel sides is 40 microns, and the distance f between the terminals 1 is 5 microns. Assuming that the contact region 13 is circular, the diameter of the contact region 3 is 60 microns or more.

According to the present embodiment, the shape of the terminal 2 connected to the external circuit and to which a voltage is applied is trapezoidal, and the long side and the short side of the trapezoidal shape are alternately formed on the connection side with the lead wire 4. By arranging, the portion where the width of the terminal 2 is formed is provided in a zigzag pattern, and the wide portion provided in the zigzag pattern is used as the contact region 3 for connection with an external circuit. The length of the terminal portion in which the terminals are arranged and formed can be reduced without lowering the performance. Further, it is not necessary to extend the lead wire 14 between the terminals 12 as in the conventional example shown in FIG.
Poor contact between the terminal 4 and the terminal 2 can be avoided.

[0011]

As described above, according to the present invention, in a high-density substrate having a large number of terminals that need to be connected to an external circuit, the terminals are trapezoidal, and the trapezoidal shape is provided on the connection side with the lead wire. By alternately arranging the long side and the short side of the terminal, a portion where the width of the terminals provided in a staggered manner is formed can be used as a contact region for connection with an external circuit, and connection reliability is reduced. It is possible to provide a terminal portion in which the terminal formation region is narrowed without using the terminal portion.

[Brief description of the drawings]

FIG. 1 is a plan view showing a terminal portion of a high-density substrate according to a first embodiment of the present invention.

FIG. 2 is a view showing a conventional liquid crystal display device having such terminal portions.

[Explanation of symbols]

1 Terminal portion, 2 terminals, 3 contact regions, 4 lead wires, a Length of the formation region of the terminal 2 (height of the trapezoidal terminal 2) b Length of half of the short side of the trapezoidal terminal 2 , C 1/2 length of the long side of the trapezoidal terminal 2, e lead wire 4
Pitch, f spacing between terminals 2.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 2H092 GA33 GA40 GA45 NA25 5C094 AA14 AA15 DB01 DB02 DB03 FA04 5E077 BB11 BB31 BB34 CC01 JJ20 JJ21 JJ23 5G435 AA14 AA17 BB12 EE46 HH12 KK09

Claims (1)

[Claims] In a terminal portion of a high-density substrate on which a large number of terminals required to be connected to an external circuit are arranged, the terminal has a trapezoidal shape, and the trapezoidal parallel side is connected to a connection side of the terminal with a lead wire. A terminal portion of a high-density substrate, wherein long sides and short sides are arranged alternately, and a wide portion of the terminal is used for connection to the external circuit.