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Display device having an improvement in insulating between conductors connected to electronic components
| Details |
Inventors: Kawashima, Akihiro; Yoshida, Hirokazu; Tagusa, Yasunobu; Inada, Kiyoshi; Makita, Hideshi; Dotta, Yoshihisa;
Assignee: Sharp Kabushiki Kaisha (Osaka, JP)
Primary Examiner: Miller; Stanley D.
Assistant Examiner: Mai; Huy K.
Attorney, Agent or Firm:
In a liquid crystal display apparatus, in order to reduce the size and weight, an integrated circuit for driving a liquid crystal is mounted on the glass substrate including the liquid crystal panel either directly or by way of a tape carrier. That is, two glass substrates of liquid crystal panel are mutually overlapped with an offset, and a liquid crystal material is injected into the overlapping regions of the two glass substrates, and liquid crystal display is effected in this region. Further, in the non-overlapping region of the two glass substrates, the integrated circuit is connected either directly or by way of a tape carrier. On the glass substrates, electrodes for varying the optical characteristics of the liquid crystals are provided, and the integrated circuit drives the liquid crystal by controlling the voltage applied to the electrodes. Further transparent insulation films are formed usually formed on the electrodes. The transparent insulation films are also formed in the non-overlapping region of the glass substrates. Since the transparent insulation films are finely patterned by photolithography, they may be selectively formed on the portions where defective insulation is likely to occur between the wiring conductors following the integrated circuit from the electrodes, or between the integrated circuit and the peripheral portion of the connecting part. |
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DETAILED DESCRIPTION It is hence a primary object of the invention to present an electronic apparatus capable of forming conductors finely by enhancing the insulation performance between conductors on a substrate to which electronic circuit component is connected, or between the conductor and a connecting electrode of the electronic circuit to be insulated from each other, and also a method for fabricating a display device.
In order to achieve the above object, the invention discloses an electronic apparatus having a conductor and an electrically insulating layer formed by photolithography, piled in this order on an electrically insulating substrate, and also having an electronic device formed in an electronic device forming region together with the conductor and the electrically insulating layer.
The device includes: an electronic circuit component on which the bonding electrode is formed; the conductor formed not only in the electronic device forming region but also in a region other than the electronic device forming region on the circuit substrate; and the electrically insulating layer formed so as to cover part of the conductor, in the region other than the electronic device forming region on the substrate.
The bonding electrode is further bonded to a bond region of the conductor not covered with the electrically insulating layer on the substrate.
According to this invention, the electrically insulating layer is selectively formed in the region other than the electronic device forming region of the substrate by photolithography.
Besides, on the electronic circuit component, a bonding electrode is formed, and is connected to the substrate in the bond region of the conductor free from the electrically insulating layer.
Therefore, since the insulation performance between the conductors in the region other than the electronic device forming region is enhanced by the electrically insulating layer for forming the electronic device, defective insulation between the conductors may be prevented without complicating the manufacturing process
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