TW538659B - Printed circuit board with notch - Google Patents

Abstract

A printed circuit board with notch for electrically connecting to a plurality of tape carriers comprises a printed circuit board body, a plurality of lead connecting areas, and at least one notch. The printed circuit board body has a plurality of circuits. The lead connecting areas are disposed on the periphery of the printed circuit board body for electronically connecting to the tape carriers. The notch is disposed between the adjacent lead connecting areas.

Description

538659

[Field of the Invention] The present invention relates to a printed circuit board (printed) irCuit Board (PCB) with a notch, and more particularly to a kind of L1Quld Crystal Display (LCD) with a notch [Previous technology] Liquid crystal display (lcd) is generally a tape carrier using a plurality of tape automatic bonding technology (Tape Aut⑽ated Bonding; TAB) as a connection device, used to print the circuit The contacts of the board connected to the glass substrate of its liquid crystal panel are further connected to the pixel electrodes on the substrate. The driving chip of the liquid crystal display is fixed in the TAB tape carrier tape. A conventional TAB tape carrier tape 24 is shown, which is electrically connected to a glass substrate 26 of a liquid crystal display. The TAB tape carrier 24 has an insulating film tape 25 formed of a polythioimide layer, with input pins 12 located on its lower surface (as shown by the dashed lines in the figure), and output pins 1-4. The TAB tape carrier tape 24 is used to carry a liquid crystal display driver = chip 22. The wheel-in pin 12 extends from the wafer 22 toward an edge of the tape 25. The output pin 14 is formed by the chip 22 toward the other side of the tape holder, and the wheel-in pin 12 is soldered to the printed circuit board 10, and should be lined up (not shown in the figure). (Shown), and the output pins 14 are connected to corresponding electrodes (pixel electrodes) of the display glass substrate 26. In the traditional structure, the reel 24 will be affected by the difference in thermal expansion coefficient between the printed circuit board 10 and the glass substrate 26 of the liquid crystal display, and the

00502.ptd

Page 4 538659 V. Description of the invention (2) " — 'The vibration, deflection, or deformation of the printed circuit board 10 causes repeated stress in the directions indicated by arrows 28 and 30. The stress in the tape 24 will be twisted or wrinkled in the areas 32 and 34 'and therefore the area most likely to be damaged is the area adjacent to the areas 36 and 38 on the input pin 12, It is very likely that the pins will break. However, as the length and width of the TAB tape carrier tape 24 increase, the tape carrier tape becomes more susceptible to damage due to stress. Among the known methods to solve these problems, 'includes (1) strengthening the input pin by resin coating, (2) providing dummy pins on both sides of the input pin array, or (3) adding The pin conductor is thick. However, these methods are accompanied by disadvantages such as complicated processing steps, increased cost, and poor results. U.S. Patent No. 5,57 2,346 issued to Sakamoto et al. On November 5, 1996 discloses a tape carrying tape for LCD driver packaging, which has at least one pair of fixing holes (anchorr ) For fixing the roll ^ tape carrier tape on the circuit board. By fixing the tape, the tape is fixed on the printed circuit board, and the twisted transmission on the tape can be prevented. However, for the entire printed circuit board and the entire liquid crystal display substrate, due to the difference in the thermal expansion coefficient, the TAB tape carrier tape 24 needs to be designed with a compensation amount so that it can be accurately connected to the printed circuit board. ; " Then. However, after cooling, the amount of shrinkage varies due to the difference in the material ', which affects the stability of the electrical connection. In addition, the shrinkage caused by cooling will also cause stress to the TAB floor tape carrier tape 24, causing the liquid crystal display panel to have TAB color unevenness defects (so-called ... Mura defects). With printing

00502.ptd Page 5 538659 V. Description of the invention (3) = board = length 1 will increase this reduction, and make this defect even more =. Prior Art and the aforementioned US patents do not address this issue. It is necessary to provide a printed circuit board, which can avoid the stress caused on the tape carrier tape during the hardening process and reduce the design difficulty to improve the quality of the display. [Summary of the Invention] In order to overcome the above disadvantages, the main purpose of the present invention is to provide a liquid crystal page stateless device and a printed circuit board with a gap.

Circuit broad; PCB), which can prevent the stress of the TAB tape carrier tape mounted on it during heating and cooling. Another object of the present invention is to provide a printed circuit board (printed circUlt broad; PCB), which can generate stress during the heating and cooling process of the TAB tape carrier tape. In order to achieve the above object, the present invention provides a notched seal ^^ for electrically connecting to a plurality of tape carrier tapes, which includes a 主体 plate main body having a plurality of circuits; a plurality of pin connection areas, two The edge of the printed circuit board main body is used to be connected with the tape carrier tape, t3 and at least one of the two. The invention is provided by the present invention, which is located at two adjacent connection areas of the plurality of pins. A liquid crystal display substrate and an LCD display substrate with electrodes for displaying shadows, P brushed circuit boards, including:-a printed circuit board main body having = road: a plurality of pin connection areas, which are located on the printed circuit The edge of the board body, and at least one notch, are located in the two adjacent ones of the plurality of pins.

00502.ptd Page 6 538659 V. Description of the invention 之间 or between, as well as the tribute carrier tape, including a liquid crystal display driver crystal, a plurality of input pins are electrically connected to the liquid crystal display substrate, and a plurality of output pins The plurality of connection areas are electrically connected to the tape carrier tape. As described by Person = 1, the printed circuit board has the notch, so the amount of expansion or contraction at the edge of the heating or-inch ° Haiyin pen circuit board can be allocated to the pin connection area ^ As a result, the amount of reduction can be relatively reduced, and the stress in the tape carrier tape can also be reduced. In order to make the above and other objects, features, and advantages of the present invention clearer, the preferred embodiments of the inventions are described below, and the accompanying drawings are described in detail below. p juice [Explanation of the invention]: The figure shows a printed circuit board 60 according to an embodiment of the present invention, which is connected to-by TAR ^ Tape Automated Bonding Technology; glass carrier tape tape 74 The liquid crystal display printed circuit board 60 is typically plate-shaped, and the upper surface thereof has a plurality of edges ('' ', not shown). The circuit is provided on one side of the printed circuit board 60 to form a pin connection area 66, which is connected by smt) and / Seven-sided mounting technology (Surface-Mount Technol 〇gy; Under the two adjacent \ Sila pressing technology, it is electrically connected to the tape carrier tape 74 ° 7 0. In the case of 6 crooked connection areas, the printed circuit board 60 has a notch h, The notch 70 is located on the printed circuit board 60 and is not used.

00502.ptd Page 7 538659 V. Description of the invention (5) To connect the TAB tape carrier tape 74, and the distance L between the two phases is equal to two adjacent TAB tape carrier tapes 74 " Middle mouth / 0 distance. The length of the notch 70 is greater than the length ql of the TAB tape carrier tape 7: 2 printed circuit board 60 overlapping. The TAB tape identification tape 74 has an insulating film tape 75, which is formed by a ~ emulsion layer, the wheel-in pin 62 is located on the lower surface (as shown in the figure = no), and the output pin 64 . The TAB tape carrier tape 74 is used for " bearing: display: device wafer 72. The input pin 62 is driven by: a sheet 72 extending toward the lower edge of the tape 75 for electrical connection with the wires on the printed board 60. The output pin 64 is extended from the other edge of the driving crybelt 75 for electrical connection with the liquid; In this configuration, the liquid crystal display; the control or driving signal can be transmitted through the printed circuit board 60, the actuator chip 72, and then to the glass substrate of the liquid crystal display 76. In this configuration, because the printed circuit board 60 has the notch 70, so the reduction amount at the edge of the printed circuit board 60 can be allocated to the individual pin connection area 66 during cooling, so that the reduction amount can be relatively reduced. Although there is still a difference in the thermal expansion coefficient between the printed circuit board 60 and the glass substrate 76 of the liquid crystal display, the stress in the TAB tape carrier tape 74 can also be reduced. Therefore, the amount of compensation designed for the TAB tape carrier tape 24 can also be reduced, and the 疋 ness of the 9 plus package connection is reduced, the effect of TABM ura defects is reduced, and the yield of the TAB tape carrier tape 24 connection is further increased. . However, the present invention is described by taking a printed circuit board for a liquid crystal display as an example, but the present invention is not limited thereto. Notched seal of the invention

00502.ptd 538659 V. Description of the invention (6) The printed circuit board can also be applied to other Tape Automated Bonding (TAB) technology. Although the present invention has been disclosed with the aforementioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

00502.ptd Page 9 538659 The diagram is simple [Illustration] Figure 1: Top view of a conventional PCB substrate carrying device; Figure 2: PCB substrate carrying device according to the first preferred embodiment of the present invention Only see above, [Illustration of drawing number]

10 Printed circuit board 12 Input pin 14 Output pin 22 LCD driver chip 24 TAB tape carrier tape 25 Insulating film tape 26 Glass substrate 28 Arrow 32 Area 36 Area 30 Arrow 34 Area 38 Area 60 Printed circuit board 62 Input connection Pin 64 output pin 66 Pin connection area 70 Notch 72 LCD driver chip 74 TAB tape carrier tape 75 Insulating film tape 76 LCD glass substrate

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Claims (1)

538659 VI. Application Patent Scope 1.—A kind of notched printed tape carrier tape, which includes ·· 糸 m is electrically connected to a plurality of :: P brush circuit board main body: has a plurality of circuits. 稷 several pin connection Area, located for; electrical connection of the service belt carrier belt; and "the edge of the board body to the y # 口 'is located in two adjacent areas of the plurality of pin connections, according to the scope of the patent application! The shape of the notch with a notch is generally a rectangular shape, and the circuit board of the factory is lacking, in which the length of the road board is greater than the length of the notch extending from the printed electricity. The printed circuit board and the tape at 3 Hai Overlapping length of a carrier tape 3. A liquid crystal display device comprising a liquid crystal display substrate having a printed circuit board including Λ ", a sheet-like image; a printed circuit board body having a plurality of pins The connection area =, and located at the edge of the main body of the printed circuit board; 'the at least one connection area of the two adjacent pins is missing! Between; and a broadcast tape carrier tape, including-said one input change pin is electrically connected to _ @ 日 = 二, the stateless driver chip, a plurality of pins are electrically connected to the tape to carry the second inverter, and several output connections The hard several pin connection areas of τ. 00502.ptd page 538 538659 6. Application scope 4. The liquid crystal display device according to item 3 of the application scope, wherein the shape of the notch of the printed circuit board is generally a rectangle, and the notch extends from the printing The length of the circuit board is greater than the length of the printed circuit board overlapping the tape carrier tape. 00502.ptd Page 12