Liquid crystal display apparatus, structure for mounting semiconductor device, method of mounting semiconductor device, electronic optical apparatus and electronic printing apparatus

Abstract: A liquid crystal display apparatus is provided which needs a small, thin and compact area thereof for mounting semiconductor chips for driving liquid crystal and, accordingly, a reduced cost. Semiconductor chips (4) for driving liquid crystal are mounted on the surfaces (the first layers (1)) of multi-layer substrates in a face-down manner, each of the surfaces having input lines (5) to the chips (4) and output lines (8) from the chips. The input lines have lands (7) for connecting the multi-layer substra-tes to each other. At least one intermediate layer (2) is formed between the upper surface (1) and the reverse surface (3), the intermediate layer having bus lines (10). The bus lines and the input lines of the first layer are connected to one another via through holes (6). The output lines of the first layer and the terminals (13) of the third layer are connected to one another via through holes of the first, second and the third layers (9, 11, 12).

Description: BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a liquid crystal display apparatus having a plurality of semiconductor chips for driving liquid crystal. Description of Related Art Mounting of a driver IC for driving liquid crystal for use in a conventional liquid crystal display apparatus will now be described with reference to Figs. 34, 35, 36 and 37. A driver IC 50041 is mounted on a tape-carrier package (hereinafter called a "TCP") 50042 and connected to a panel 16 while interposing a connection member 19. Input lines 50044 and output lines 50045 of the TCP 50042 to and from the driver IC 50041 are disposed on the same surface of the TCP 50042, the connection with the panel 16 being established by using the connection member 19 so that a leading portion 50046 of the output line pattern 50045 on the surface of the TCP substrate 50042 and a panel terminal 18 are connected to each other. Another method of mounting the driver IC for driving liquid crystal for use in the conventional liquid crystal display apparatus will now be described with reference to Figs. 34, 35, 36, 37, 38 and 39. The driver IC 50041 is mounted on the tape-carrier package (hereinafter called the "TCP") 50042 and connected to the panel 16 while interposing an anisotropic conductive film 50049. In the TCP 50042, the input lines 50044 to the driver IC 50041 and the output lines 50045 from the driver IC 50041 are disposed on the surface of the substrate TCP 50042 and are connected to the panel 16 in such a manner that the leading portion 50046 of the output line pattern 50045 on the surface of the substrate TCP 50042 and the panel terminal 18 are connected by using the anisotropic conductive film 50049. The anisotropic conductive film 50049 is mainly made of conductive particles 50050 and an adhesive agent 50051. The thickness (H) of the adhesive agent 50051 is made to be larger than the particle size (D) of the conductive particles 50050. If the thickness (K) of the leading portion 50046 of the TCP 50042 is larger than the particle size (D) of the conductive particle 50050, a connection state shown in Fig. 39 is therefore realized in which the conductive particles 50050 are so crushed that conduction is established. If the thickness (k) of a connection terminal 13 is smaller than the particle size (D) of the conductive particle 50050, the adhesive agent 50051 cannot be removed sufficiently. In this case, there arises a problem in that the electrical connection by the conductive particles 50050 cannot be established satisfactorily. The input line 50044 to the driver IC 50041 is, by soldering, connected to another substrate (hereinafter called a "bus substrate") 50043 for supplying input signals and electric power. The bus substrate 50043 is formed into two-layer shape so that the bus line can be wired in a cross manner. However, the detailed illustrations about the wired portions and connection portions are omitted here. The major portion of the TCP 50042 and the bus substrate 50043 are positioned outside the outline of the panel 16 so that the area required to mount the semiconductor chip is very wide. Further, the bus substrate must be used as an individual element and, accordingly, the cost cannot be reduced. Then, a COG (Chip On Glass) method will now be described with reference to Fig. 37. Fig. 37 is a cross sectional view which illustrates an essential portion in which the semiconductor chip is mounted by the COG method. If a bus line 50048 is intended to be wired on the panel substrate, it must be wired on the panel substrate in a manner crossing an input line 50047 to the driver IC 50041 for driving liquid crystal. Since the lines must be formed by thin metal films made of Au or Ni or the like, each line must have a large width in order to reduce the resistance value. Therefore, a large area is required to mount the semiconductor chip, and what is worse, the cost cannot be reduced because wiring using the thin metal film must be performed in the cross manner. A conventional liquid crystal display apparatus includes display pixels composed of matrix electrodes each consisting of line electrodes and column electrodes. Display signals for driving a semiconductor device disposed in the peripheral portion of the liquid crystal display device in a TAB (Tape-Automated-Bonding) manner are supplied to an electrode terminal of the display device connected with an anisotropic conductive adhesive agent or a conductive rubber connector. Figs. 41 and 42 illustrate an example of the mounting structure employed in a liquid crystal display apparatus in which a semiconductor device mounted in the TAB manner is connected to a liquid crystal display device. Referring to Figs. 41 and 42, a TCP (Tape-Carrier-Package) 50151 for driving liquid crystal comprises a semiconductor device 111 for driving liquid crystal which is mounted on a flexible wiring member 50152 in the so-called TAB method. Further, a TCP output terminal 50153 disposed on one side of the TCP 50151 is connected to the terminal portion of a liquid crystal member 110 with an anisotropic conductive agent 115, while a TCP input terminal 50154 and a drive control circuit substrate 50155 disposed on the other side are connected by soldering. Since the foregoing conventional technology must comprise an individual wiring substrate (the bus substrate) for supplying input signals and electric power to the driver IC and thin metal film lines wired in the cross manner, the area required to mounting the semiconductor chip cannot be reduced. Therefore, there arises a problem in that a liquid crystal display apparatus, the cost and the size of which can be reduced, cannot be provided. The foregoing conventional technology has an arrangement that semiconductor devices 111 for driving liquid crystal are, by a TAB mounting method, connected to the electrodes of the liquid crystal display devices 110 in the sequential order of the column (connected in parallel to the pixels and sequentially) while being formed into a TCP shape for each semiconductor device. Further, the semiconductor devices 111 are connected to a drive control circuit substrate 50155 for supplying electric power for driving liquid crystal and control signals (hereinafter called a "bus lines"). A liquid crystal display apparatus of the type having the foregoing mounting structure and adapted to the color display requires a pixel density three times that of white and black display apparatus when the same resolution as that realized by the white and black display apparatus is intended to be realized. It leads to a fact that the number of lines for mutually connecting the TCPs increases excessively to maintain the reliability in the connection. Further, the drive control circuit substrate 50155 must have a precise wiring rule due to the increase in the number of the terminals, and, accordingly, the substrate must be formed into a multi-layer shape. As a result, the size of the liquid crystal display apparatus cannot be reduced and the number of required elements increases undesirably. Therefore, the overall cost of the apparatus cannot be reduced. Fig. 43 is a view which illustrates the structure of a conventional color liquid crystal display apparatus disclosed in Japanese Patent Laid-Open No. 2-214826. In order to be adaptable to the increased number of the color display pixels, TCPs 50151-1 to 50151-3 are formed into three layers. The portions in which the foregoing TCPs 50151-1 to 50151-3 are connected to the drive control circuit substrate 50155 are arranged in the same manner as those of the structure shown in Fig. 42. Therefore, the number of required connections increases due to the rise in the pixel density. Hence, the defect occurring in the connection cannot be prevented. What is worse, the structure, in which the TCPs are stacked, causes the semiconductor device to project in the direction of the thickness, resulting in a problem to rise in that the size of the apparatus cannot be reduced. The document JP-A-4-115 228 discloses a liquid crystal display apparatus according to the precharacterizing portion of claim 1. In this prior art the semiconductor chip is directly mounted on a base substrate of the liquid crystal panel. The document JP-A-4-283 722 discloses a display apparatus comprising a multi-layer substrate used in connection with a liquid crystal display panel. The semiconductor chip in this prior art is mounted on a flexible substrate, which, on the one hand, is connected to connection terminals at the periphery of the glass substrate of a liquid crystal display element by using an anisotropic conductive film, and, on the other hand, is connected to a multi-layer circuit board. SUMMARY OF THE INVENTION Accordingly, the present invention is directed to overcome the foregoing problems and therefore an object of the present invention is to provide a liquid crystal display apparatus which requires a small area for mounting the semiconductor chip for driving liquid crystal thereof, the thickness and the size of which can be reduced and the cost of which can therefore be reduced satisfactorily. Another object of the present invention is to provide a liquid crystal display apparatus capable of displaying precise and high density color images by a liquid crystal thereof while necessitating reduced cost and the size thereof. These objects are achieved with a liquid crystal display apparatus as claimed in claim 1. Preferred embodiments of the invention are subject-matter of the dependent claims. Other and further objects, features and advantages of the invention will be appear more fully from the following description. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view which illustrates a multi-layer substrate according to an embodiment of the present invention; Fig. 2 illustrates a liquid crystal display apparatus according to an embodiment of the present invention; Fig. 3 illustrates an essential portion of the liquid crystal display apparatus according to the embodiment of Fig. 2; Fig. 4 is a cross sectional view which illustrates an essential portion of the liquid crystal display apparatus according to the embodiment of Fig. 2; Fig. 5 is an exploded view which illustrates a multi-layer substrate according to another embodiment of the present invention; Fig. 6 illustrates an essential portion of the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 7 is an exploded view which illustrates a multi-layer substrate according to another embodiment of the present invention; Fig. 8 illustrates an essential portion of the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 9 illustrates an essential portion of the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 10 is a cross sectional view which illustrates an essential portion of the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 11 is an exploded view which illustrates a multi-layer substrate according to another embodiment of the present invention; Fig. 12 illustrates an essential portion of the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 13 illustrates an essential portion of the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 14 illustrates an essential portion of the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 15 is an exploded view which illustrates a multi-layer substrate according to an embodiment of the present invention; Fig. 16 illustrates a liquid crystal display apparatus according to another embodiment of the present invention; Fig. 17 illustrates an essential portion of the liquid crystal display apparatus according to the present invention; Fig. 18 is a cross sectional view which illustrates the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 19 is an exploded view which illustrates the liquid crystal display apparatus according to another embodiment of the present invention; Fig. 20 illustrates an essential portion of the liquid crystal display apparatus according to the other embodiment of the present invention; Fig. 21 is a cross sectional view which illustrates an anisotropic conductive film according to an embodiment of the present invention; Fig. 22 is a cross sectional view which illustrates an anisotropic conductive film according to another embodiment of the present invention; Fig. 23 is a cross sectional view which illustrates an anisotropic conductive film according to another embodiment of the present invention; Fig. 24 is a cross sectional view which illustrates an essential portion of the connection portion of the anisotropic conductive film or an anisotropic conductive adhesive agent; Fig. 25 is an exploded view which illustrates a multi-layer substrate according to an embodiment of the present invention; Fig. 26 is a cross sectional view which illustrates an essential portion of a liquid crystal display apparatus according to another embodiment of the present invention; Fig. 27 illustrates an essential portion of a liquid crystal display apparatus according to another embodiment of the present invention; Fig. 28 illustrates a liquid crystal display apparatus according to another embodiment of the present invention; Fig. 29 illustrates a fastening hole of a multi-layer substrate according to another embodiment of the present invention; Fig. 30 illustrates a fastening hole of a multi-layer substrate according to another embodiment of the present invention; Fig. 31 is a perspective view which illustrates another-shape fastening hole of a multi-layer substrate according to another embodiment of the present invention; Fig. 32 illustrates a liquid crystal display apparatus according to another embodiment of the present invention; Fig. 33 is a cross sectional view which illustrates a liquid crystal display apparatus according to another embodiment of the present invention; Fig. 34 illustrates a conventional liquid crystal display apparatus; Fig. 35 illustrates an essential portion of the conventional liquid crystal display apparatus; Fig. 36 is a cross sectional view which illustrates an essential portion of the conventional liquid crystal display apparatus; Fig. 37 is a cross sectional view which illustrates an essential portion of another conventional liquid crystal display apparatus; Fig. 38 is a cross sectional view which illustrates a conventional anisotropic conductive film; Fig. 39 is a cross sectional view which illustrates an essential portion of a connection portion of the conventional anisotropic conductive film; Fig. 40 is a cross sectional view which illustrates an essential portion of a connection portion of the conventional anisotropic conductive film; Fig. 41 is a cross sectional view which illustrates a conventional structure for mounting a semiconductor device and a state where it is mounted on a display device; Fig. 42 is a cross sectional view which illustrates a conventional structure for mounting a semiconductor device and a state where it is mounted on a display device; and Fig. 43 is a cross sectional view which illustrates another conventional structure for mounting a semiconductor device and a state where it is mounted on a display device. DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will now be described with reference to Figs. 1, 2, 3 and 4. Fig. 1 is an exploded perspective view which illustrates a multi-layer substrate according to the first embodiment of the present invention in which a semiconductor chip for driving liquid crystal is mounted on the surface of a multi-layer substrate by a face-down bonding method. Reference numerals 1, 2 and 3 represent layers of the multi-layer (comprising three layers) substrate composed of a first layer 1, a second layer 2 and a third layer 3. A semiconductor chip 4 for driving liquid crystal is mounted on the surface of the first layer 1 in the face-down bonding manner by a known method (for example, a method in which an Au bump of the semiconductor is connected to the substrate by using Ag paste or a method in which an anisotropic conductive film is used or a flip chip method in which soldering bump is used). After the semiconductor chip 4 has been bonded as described above, molding members 20 are respectively disposed around the semiconductor chip 4 and between the semiconductor chip 4 and the first layer 1 in order to prevent corrosion and reinforce bonding. The molding members 20 are made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials in the form of a solvent or thermo-hardening or light hardening type or a mixture thereof. Input lines 5 corresponding to input pads of the semiconductor chip 4 are formed on the surface of the first layer 1 by patterning. The input lines 5 are connected to bus lines 10 of the second layer 2 via through holes 6. Further, lands 7 are formed at the leading portions of the input lines 5 for establishing a wire bonding connection with another multi-layer substrate formed similarly and positioned adjacently. Output lines 8 corresponding to output pads of the semiconductor chip 4 are formed on the surface of the first layer 1 by patterning. Since the pitch of the terminals of the panel is longer than the pitch of the output pads of the semiconductor chip 4 , the line pattern is widened on the first layer 1 so that the output pads and the terminals of the panel are aligned to one another. Further, through holes 9 are formed at the leading portions of the output lines 8 so that the output lines 8 pass through holes 11 of the second layer 2 and are connected to connection terminals 13 of the panel via through holes 12 of the third layer 3. Each of the first, second and the third layers 1, 2 and 3 is made of ceramic substrates manufactured by simultaneously sintering alumina bases at low temperature to have a thickness of 0.25 mm. The input lines 5, the output lines 8 and the bus lines 10 are formed by sintering Au, Ag, AgPd or Cu metal paste. Similarly, the through holes 6, 9, 11 and 12 are formed by sintering Au, Ag, AgPd or Cu metal paste. Also the lands 7 and the connection terminals 13 are respectively formed by sintering Au, Ag, AgPd or Cu metal paste. The foregoing elements for each layer are formed by a known print patterning method, and the layers are stacked, sintered and integrated so that forming of the multi-layer substrate is completed. Each of the metal layers formed by patterning and sintering as described above usually has a thickness of about 0.001 mm to about 0.05 mm. The foregoing thickness may be about 0.05 mm to about 0.2 mm in order to reduce the resistance value. Depending upon the pitch of the lines and upon the dimension accuracy, the input lines 5, the lands 7, the output lines 8 on the first layer 1 and the connection terminals 13 on the reverse side of the third layer 3 may be formed by photolithographic patterning after the Au, Ag, AgPd or Cu metal paste or a mixture of two or more of these has been printed on the entire surface. In this case, the thickness of the formed pattern is about 0.001 mm to about 0.2 mm. As an alternative to employing the printing method, the pattern may be formed by a photolithographic method or a plating method after Au, Ag or Cu has been evaporated or after the thin film has been formed by sputtering. In this case, the thickness of the formed pattern is about 0.0005 mm to about 0.1 mm. Since the ceramic substrates subjected to the sintering process exhibit excellent dimension stability against moisture, excellent connection stability can be realized in the portion in which the semiconductor chip 4 and the multi-layer circuit substrate 14 are connected to each other and in the portion in which the connection terminals 13 of the multi-layer circuit substrate 14 and the panel terminals 18 are connected to one another. Each of the first, second and the third layers 1, 2 and 3 may be made of different materials, for example, a glass epoxy plate made of a composite material of glass fiber and epoxy resin. The thickness of the glass epoxy plate may be about 0.05 mm to about 0.8 mm in place of the employed thickness of 0.1 mm. The input lines 5, the output lines 8, the through holes 10, the lands 7 and the connection terminals 13 for each layer are formed by a known subtractive method or an additive method in which metal, such as copper, is patterned. The through holes 6, 9, 11 and 12 are, by a known plating method using metal such as copper, formed for each layer or collectively while stacking the layers. Although the thickness of the patterned metal is about 0.001 mm to about 0.035 mm, it may be about 0.035 mm to about 0.2 mm in order to reduce the resistance and to permit large electric currents to flow. The surface of each of the input lines 5, the output lines 8, the bus lines 10, the lands 7, the connection terminals 13, the through holes 6, 9, 11 and 12 may be applied with plating using sole metal, such as Ni, Au, Cr, Co, Pd, Sn, Pb or In or a mixture of two or more of these materials, plating being performed to have a thickness of about 0.00005 mm to about 0.05 mm. If a glass epoxy plate is used, the thickness can be decreased as compared with the foregoing ceramic substrate. Further, the cost can be reduced because ordinary material and manufacturing process can be employed. Each of the first, second and the third layers 1, 2 and 3 may be formed by an organic resin film solely made of polyimide (PI), polyethylene terephthalate (PET), polyether sulfon (PES), polycarbonate (PC), polyester (PS), cellulose triacetate (TAC), polysulfon (PS), acryl, epoxy, polyether ether ketone (PEEK) or polyarylate or made of a mixture of two or more of these. Although the polyimide film having a thickness of 0.025 mm is employed as the organic resin film, the thickness of the organic resin film may be about 0.001 mm to about 0.5 mm. The input lines 5, the output lines 8, the bus lines 10, the lands 7 and the connection terminals 13 for each layer are formed by a known sub-tractive method or an additive method in which metal, such as copper, is patterned. The through holes 6, 9, 11 and 12 are formed collectively for each layer or formed after the layers 1, 2 and 3 have been stacked by a known plating method using metal, such as copper. As an alternative to this, a member formed by applying a PI coat (by a known casting method or the like) to metal foil made of, for example, copper, may be patterned and stacked. Although the thickness of the patterned metal is about 0.001 mm to about 0.035 mm, the thickness may be made to be about 0.035 mm to about 0.2 mm in order to reduce the resistance or to permit large electric currents to flow. The surface of each of the lines 5, 8, 10, the lands 7, the connection terminals 13, the through holes 6, 9, 11 and 12 may be applied with plating solely using Ni, Au, Cr, Co, Pd, Sn, Pb or In or using a mixture of two or more of these materials. The thickness of the layers made by plating is about 0.0001 mm to about 0.05 mm. If the organic resin film is used, the thickness can be reduced as compared with the thickness realized by using the ceramic substrate or the epoxy glass plate and the connection between the panel terminal 18 and the connection member 19 can easily be established. Therefore, the connection reliability can be improved and the connection process can be simplified. Fig. 2 illustrates an example in which the multi-layer substrate according to the first embodiment shown in Fig. 1 is connected to a liquid crystal display panel. Fig. 3 is an enlarged view which illustrates an essential portion of the connection portion shown in Fig. 2. Fig. 4 illustrates the cross sectional view of the essential portion of the connection portion shown in Fig. 2. A liquid crystal display panel (for example, 640 dots x 480 dots) 16 has 16 multi-layer substrates 14 according to the first embodiment shown in Fig. 1 mounted in direction X and 5 multi-layer substrates 14 in direction Y, the multi-layer substrates 14 thus disposed being connected to the panel terminals 18. However, 12 multi-layer substrates 14 in the direction X and 5 multi-layer substrates 14 in the direction Y are omitted in Fig. 2. The terminals 13 of the multi-layer substrate 14 and the panel terminals 18 are connected to one another by the connection member 19. The connection member 19 establishes electrical connections and somewhat fixes the multi-layer substrate 14 to the panel. The connection member 19 is made of an anisotropic conductive film mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive film is disposed between the panel terminals 18 and the connection terminals 13 of the multi-layer substrate 14. If the anisotropic conductive film is a thermo-hardening film or a blend type of a thermoplastic film and a thermo-hardening film, a heating and pressurizing head is abutted against the multi-layer substrate 14 so that the anisotropic film is hardened and connected. If the anisotropic conductive film is an ultraviolet hardening type film, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminal 18 (adjacent to the glass) to harden the ultraviolet hardening type film. Alternatively, as the connection member 19, an anisotropic conductive adhesive agent mainly composed of conductive particles and an adhesive agent is used. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these materials, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive adhesive agent is a fluid or paste agent and applied to the portion in which the panel terminal 18 is connected by a known method, for example, printing or a dispensing method using a dispenser. If the anisotropic conductive adhesive agent is a thermo-hardening agent or a blended agent of a thermoplastic agent and a thermo-hardening agent, a heating and pressuring head is abutted against the multi-layer substrate 14 so that the agent is hardened and connected. If the anisotropic conductive film is an ultraviolet hardening type film, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminal 18 (adjacent to the glass) to harden the ultraviolet hardening type film. In order to protect the exposed portion of the panel terminal 18, a molding 21 is placed. The molding 21 also serves to fix the multi-layer substrate 14 to the panel. The molding 21 is made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials of any one of solvent type, thermo-hardening type, or light hardening type or a mixture thereof. The bus lines between adjacent multi-layer substrates 14 are connected by wire bonding with wires 15 via the lands 7. The wires 15 may be made of metal such as Au, Al or Cu or the like or their alloy (alloy containing Be, Si or Mg or the like included). The width of the wire-bonded portion is so determined as to be narrower than the width of the multi-layer substrate, resulting in that the wire-bonded portion can be mounted in a satisfactorily compact manner in which it is included within the outline of the panel 16. The connection member 19 may be an anisotropic conductive film arranged as shown in Fig. 21 and mainly composed of conductive particles 32 and an adhesive agent 33. The thickness (h) of the adhesive agent 33 is made thinner than the particle size (d) of the conductive particles 32. The anisotropic conductive film 31 may be formed on a separator 34 (a teflon or a PET sheet (film) or a paper sheet). The conductive particles 32 are, as shown in Fig. 22, sole soldering particles, Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Au, Cu or Fe or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The particle size (d) is about 0.001 mm to about 0.020 mm. The adhesive agent 27 is sole styrene butadiene styrene (SBS), epoxy, acrylic, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials having a thickness (h) ranging from about 0.0005 mm to about 0.018 mm. The anisotropic conductive film 31 is disposed between the panel terminal 18 and the connection terminal 13 of the multi-layer substrate 14. If the anisotropic conductive film 31 is a thermo-hardening agent or a blend type of a thermoplastic agent and a thermo-hardening agent, a heating and pressurizing head is abutted against the multi-layer substrate 14 so that the anisotropic adhesive agent is hardened and connected. If the anisotropic conductive film 31 is an ultraviolet hardening type adhesive agent, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive adhesive agent from a position adjacent to the panel terminal 18 (adjacent to the glass) to harden and connect the ultraviolet hardening type film. Even if the thickness (k) of the connection terminal 13 of the multi-layer substrate 14 is thinner than the particle size (d) of the conductive particle 32 (in particular, if the pitch of the connection terminals is 0.1 mm or shorter), the adhesive agent 33 can be removed satisfactorily at the time of applying pressure so that the panel terminal 18 and the connection terminal 13 of the multi-layer substrate 14 can be assuredly electrically connected to each other by the conductive particles 32 (see Fig. 10). The thus established connection state is maintained by the adhesive agent 33 so that satisfactory connection reliability is maintained. Another conductive member may be employed as shown in Fig. 23 which has an arrangement that an anisotropic adhesive agent 35 in the form of fluid or paste including the conductive particles 32 and the adhesive agent 33 is applied to the portion, in which the panel terminal 18 is connected, by a known method, such as a printing method or a dispensing method using a dispenser. At this time, the viscosity and the thixotropic characteristics of the anisotropic conductive agent 35 are so controlled as to make the thickness (h) of the adhesive agent 33 to be smaller than the particle size (d) of the conductive particles 32. As a result, the connection can reliably be established as shown in Fig. 24 by a method similar to that for connecting the foregoing anisotropic conductive film with pressure. In order to protect the exposed portion of the panel terminal 18 from corrosion, a molding 21 is placed. The molding 21 also serves to fix the multi-layer substrate 14 to the panel. The molding 21 is made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials of any one of solvent type, thermo-hardening type, or light hardening type or a mixture thereof. The bus lines between adjacent multi-layer substrates 14 are connected by wire bonding with wires 15 via the lands 7. The wires 15 may be made of metal such as Au, Al or Cu or the like or their alloy (alloy containing Be, Si or Mg or the like included). The width of the wire-bonded portion is so determined as to be narrower than the width of the multi-layer substrate, resulting in that the wire-bonded portion can be mounted in a satisfactorily compact manner in which it is included within the outline of the panel 16 as shown in Fig. 4. As described above, use of the multi-layer substrate according to this embodiment enables the lines to be wired in the cross manner in the same multi-layer substrate as contrasted with the conventional TAB method using individual bus substrates to wire the bus lines in the cross manner. Therefore, the overall size can be reduced as compared with the TAB method by raising the density of the lines wired on the substrate. Further, the cost can be reduced because individual bus lines are not used. Since the conventional COG method has the arrangement that the cross wiring of the bus lines is performed on the panel substrate, a wide area is required to wire the bus lines. Further, metal lines must be used to reduce the resistance value of the wired lines, resulting in an enlargement of the cost. However, use of the multi-layer substrate according to this embodiment enables the space required to wire the bus lines and the cost to be reduced as compared with the COG method. Second Embodiment A second embodiment of the present invention will now be described with reference to Fig. 5. Fig. 5 is an exploded perspective view which illustrates a multi-layer substrate of a liquid crystal display apparatus according to a second embodiment of the present invention in which a semiconductor chip for driving liquid crystal is mounted on the surface of a multi-layer substrate by wire bonding. Wire bonding lands 22 are, on the surface of the first layer 1 of the multi-layer substrate, formed for the input lines 5 and the output lines 8 to correspond to the input/output pads of the semiconductor chip 4 . The residual factors, such as the pattern, through holes, the method of forming the multi-layer substrate, the arrangement and the structure are the same as those according to the first embodiment. The reverse side of the semiconductor chip 4 is secured to the surface of the multi-layer substrate. Further, the input/output pads of the semiconductor chip 4 and the lands 22 on the surface of the first layer 1 of the multi-layer substrate are wire-bonded to one another. Wire 23 for use to connect the multi-layer substrates according to the first embodiment may be used here. Further, the bonded portions and the wired portions are, although omitted from illustration, applied with molding material to be protected and reinforced similarly to the first embodiment. The bus lines between the adjacent multi-layer substrates are connected by wire bonding similarly to the first embodiment. Further, the bonded portions and the wired portions are, although omitted from illustration, applied with molding material to be protected and reinforced similarly to the first embodiment. As described above, use of the multi-layer substrate according to this embodiment enables the size and the cost to be reduced similarly to the first embodiment as compared with the conventional TAB method and the COG method. Third Embodiment A third embodiment will now be described with reference to Fig. 6. Fig. 6 illustrates a liquid crystal display apparatus according to the present invention in which the multi-layer substrates 14 having the face-down-bonded semiconductor chips 4 thereon are connected to the panel terminal 18 of the liquid crystal display panel by using the anisotropic conductive film 19 similarly to the first embodiment. The essential portion of the connection portion is arranged to be similar to that according to the first embodiment shown in Fig. 4. However, the leading portions of the input lines of the first layer 1 of the multi-layer substrate are formed into shapes adaptable to be connected to heat seal or flexible substrates in place of the wire bonding lands. The bus lines of the adjacent multi-layer substrates 14 are connected to one another by using a connection substrate 24. The connection substrate 24 may be a heat seal or a flexible substrate. The width of the portion, in which the connection substrate 24 is connected, is so determined as to be narrower than the width of the multi-layer substrate 14, resulting in that the wire-bonded portion can be mounted in a satisfactorily compact manner in which it is included within the outline of the panel 16 as shown in Fig. 4. As described above, use of the multi-layer substrate according to this embodiment enables the size and the cost to be reduced similarly to the first embodiment as compared with the conventional TAB method and the COG method. Further, the connection of the semiconductor chip for driving liquid crystal to the surface of the multi-layer substrate and the electrical connection between the adjacent multi-layer substrates may be established by combining the methods according to first, second and the third embodiments. In any case, the size and the cost can be reduced similarly. Further, the multi-layer substrate having the semiconductor chip for use in the foregoing embodiments mounted thereon can be mounted on another display apparatus or an electronic printing apparatus such that it can be mounted on a plasma display or an EL display apparatus by changing the foregoing semiconductor chip to a semiconductor chip for driving the plasma display or a semiconductor chip for driving the EL. By similarly mounting a semiconductor chip for driving a thermal head on the multi-layer substrate and by similarly connecting the multi-layer substrate to the thermal head, application to an electronic printing apparatus can be realized. Fourth Embodiment A fourth embodiment will now be described with reference to Figs. 4, 7, 8, 9 and 10. Fig. 7 is an exploded perspective view which illustrates a liquid crystal display apparatus according to the present invention in which a multi-layer substrate according to this embodiment includes a semiconductor chip for driving liquid crystal face-down bonded thereon. Reference numerals 1, 2 and 3 represent layers of the multi-layer (comprising three layers) substrate composed of a first layer 1, a second layer 2 and a third layer 3. A semiconductor chip 4 for driving liquid crystal is mounted on the surface of the first layer 1 in the face-down bonding manner by a known method (for example, a method in which an Au bump of the semiconductor is connected to the substrate by using Ag paste or a method in which an anisotropic conductive film is used or a flip chip method in which soldering is performed). After the semiconductor chip 4 has been bonded as described above, molding members 20 are respectively disposed around the semiconductor chip 4 and between the semiconductor chip 4 and the first layer 1 in order to prevent corrosion and reinforce bonding. The molding members 20 are made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials in the form of a solvent or thermo-hardening or light hardening type or a mixture thereof. Input lines 5 corresponding to input pads of the semiconductor chip 4 are formed on the surface of the first layer 1 by patterning. The input lines 5 are connected to bus lines 10 of the second layer 2 via through holes 6 and through holes 25. Further, the input lines 5 are connected to the connection terminals 27 formed on the reverse side of the third layer 3 via the through holes 26 formed in the third layer 3. The connection terminals 27 are respectively formed into a proper shape to have a proper size and a thickness to be connected to the connection terminals 29 of the bus lines 28 on the panel. The connection terminals 27 are disposed on the side of the multi-layer substrate 14 perpendicular to the side on which the connection terminals 13 for establishing the connection with the panel are disposed. Although the illustrated structure comprises the connection terminals 27 disposed in a line, a two-line configuration may be employed. Output lines 8 corresponding to output pads of the semiconductor chip 4 are formed on the surface of the first layer 1 by patterning. Since the pitch of the terminals of the panel is longer than the pitch of the output pads of the semiconductor chip 4 , the line pattern is widened on the first layer 1 so that the output pads and the terminals of the panel are aligned to one another. Further, through holes 9 are formed at the leading portions of the output lines 8 so that the output lines 8 pass through the through holes 11 of the second layer 2 and are connected to connection terminals 13 of the panel via through holes 12 of the third layer 3. Although a method of making coinciding the pitch of the pads of the semiconductor chip with the pitch of the terminals of the panel of the multi-layer substrate composed of the three layers is described here, the coincidence may be made over a plurality of layers (two or more layers) in place of making only one layer coincide. Each of the first, second and the third layers 1, 2 and 3 is made of ceramic substrates manufactured by simultaneously sintering alumina bases at low temperature to have a thickness of 0.25 mm. The input lines 5, the output lines 8 and the bus lines 10 are formed by sintering solely or mixture of Au, Ag, AgPd or Cu metal paste. Similarly, the through holes 6, 9, 11, 12, 25 and 26 are formed by sintering Au, Ag, AgPd or Cu metal paste. Also the connection terminals 13 and 27 are respectively formed by sintering solely Au, Ag, AgPd or Cu metal paste or a mixture of two or more of these. The foregoing elements for each layer are formed by a known print patterning method, and the layers are stacked sintered and integrated so that forming of the multi-layer substrate is completed. Each of the metal layers formed by patterning and sintering as described above usually has a thickness of about 0.001 mm to about 0.05 mm. The foregoing thickness may be about 0.05 mm to about 0.2 mm in order to reduce the resistance value. Depending upon the pitch of the lines and upon the dimension accuracy, the input lines 5 and the output lines 8 on the surface of the first layer 1 and the connection terminals 13 and 27 on the third layer 3 may be formed by photolithographic patterning after the Au, Ag, AgPd or Cu metal paste or a mixture paste of two or more of these materials has been printed on the entire surface. In this case, the thickness of the formed pattern is about 0.001 mm to about 0.2 mm. As an alternative to employing the printing method, the pattern may be formed by a photolithographic method or a plating method after Au, Ag or Cu has been evaporated or after the thin film has been formed by sputtering. In this case, the thickness of the formed pattern is about 0.0005 mm to about 0.1 mm. Fig. 8 is an exploded view which illustrates an essential portion in which the multi-layer substrate according to this embodiment shown in Fig. 11 is connected to the liquid crystal display panel. The cross section (section x-x of Fig. 8) of the essential portion of the connection portion is as shown in Fig. 4 similarly to the first embodiment. Connection terminals 18, bus lines 28 and connection terminals 29 to be disposed at the end portions of the bus lines 28 are, by patterning, formed on the panel 16 to correspond to the portion in which the multi-layer substrate 14 will be mounted. Although a straight-line pattern is formed in the structure shown in Fig. 8, the pattern may be formed fully in an allowable area in terms of wiring if the resistance of the circuit and that of the connections are intended to be reduced. The bus lines 28 on the panel serve as bus lines for establishing the connections between the foregoing multi-layer substrates. Fig. 9 illustrates a structure arranged substantially similarly to that according to the embodiment shown in Fig. 8 except for an arrangement in which the connection terminals 13 of the multi-layer substrate 14 are disposed inside the panel 16. The cross section (section y-y of Fig. 9) of the essential portion of the connection portion is as shown in Fig. 10 whereby the length of each of lines arranged from the panel terminals 18 to the inside portion of the panel can be shorter than that according to the embodiment shown in Fig. 4. As a result, an effect can be obtained in that the circuit resistance can be reduced. The connection terminals 13, the panel terminals 18, the connection terminals 27 and the panel terminals 28 are connected to one another by connection members 19. The connection members 19 maintain the electrical connections and also act to fix somewhat the multi-layer substrates 14 to the panel. The connection member 19 is made of an anisotropic conductive film mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive film is disposed between the panel terminals 18 and the connection terminals 13 and 27 of the multi-layer substrate 14. If the anisotropic conductive film is a thermo-hardening film or a blend type of a thermoplastic film and a thermo-hardening film, a heating and pressurizing head is abutted against the multi-layer substrate 14 so that the anisotropic film is hardened and connected. If the anisotropic conductive film is an ultraviolet hardening type film, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 29 (adjacent to the glass) to harden the ultraviolet hardening type film. If the pressuring head is formed into a U-shape facing sidewards or if a multiplicity of the pressuring heads are used to correspond to the configuration of the connection terminals 13 and 27, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. Alternatively, as the connection member 19, an anisotropic conductive adhesive agent is used which is mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these materials, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive adhesive agent is a fluid or paste agent and applied to the portion in which the panel terminal 18 is connected by a known method, for example, printing or a dispensing method using a dispenser. If the anisotropic conductive adhesive agent is a thermo-hardening agent or a blended agent of a thermoplastic agent and a thermo-hardening agent, a heating and pressuring head is abutted against the multi-layer substrate 14 so that the agent is hardened and connected. If the anisotropic conductive adhesive agent is an ultraviolet hardening type adhesive agent, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 19 (adjacent to the glass) to harden the ultraviolet hardening type film. If the pressuring head is formed into a U-shape facing sidewards or if a multiplicity of the pressuring heads are used to correspond to the configuration of the connection terminals 13 and 27, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. In order to protect the exposed portion of the panel terminal 18 from corrosion, a molding 21 is placed. The molding 21 also serves to fix the multi-layer substrate 14 to the panel. The molding 21 is made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials of any one of solvent type, thermo-hardening type, or light hardening type or a mixture thereof. As shown in Fig. 4, the multi-layer substrate can be mounted in a compact manner within the outline of the panel 16. As described above, the bus lines formed on the panel to serve as the means for establishing the electrical connections between the multi-layer substrates enables the bus lines to be formed simultaneously with the other lines on the panel. Therefore, an individual forming process does not need to be performed. Further, individual elements such as the heat seal can be omitted. In addition, the fact that the connections of the input and output terminals can be collectively established causes the manufacturing process to be simplified. Fifth Embodiment A fifth embodiment will now be described with reference to Figs. 4, 10, 11, 12, 13 and 14. Fig. 11 is an exploded perspective view which illustrates a liquid crystal display apparatus according to the present invention in which a multi-layer substrate according to this embodiment includes a semiconductor chip for driving liquid crystal face-down bonded thereon. Reference numerals 1, 2 and 3 represent layers of the multi-layer (comprising three layers) substrate composed of a first layer 1, a second layer 2 and a third layer 3. A semiconductor chip 4 for driving liquid crystal is mounted on the surface of the first layer 1 in the face-down bonding manner by a known method (for example, a method in which an Au bump of the semiconductor is connected to the substrate by using Ag paste or a method in which an anisotropic conductive film is used or a flip chip method in which soldering is performed). After the semiconductor chip 4 has been bonded as described above, molding members 20 are respectively disposed around the semiconductor chip 4 and between the semiconductor chip 4 and the first layer 1 in order to prevent corrosion and reinforce bonding. The molding members 20 are made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials in the form of a solvent or thermo-hardening or light hardening type or a mixture thereof. Input lines 5 corresponding to input pads of the semiconductor chip 4 are formed on the surface of the first layer 1 by patterning. The input lines 5 are connected to bus lines 10 of the second layer 2 via through holes 6 and through holes 25. The bus lines 10 are connected to through holes 30 of the second layer 2 and connected to the connection terminals 27 formed on the reverse side of the third layer 3 via the through holes 30 and the through holes 26 of the second layer 2. The connection terminals 27 are disposed to substantially run parallel to the connection terminals 13. The connection terminals 27 and the connection terminals 13 are formed into the same shape, have the same size and thickness. Although Fig. 11 illustrates the structure in which the connection terminals 13 and 27 respectively have the same shape and are disposed at the same pitch, the connection terminals 13 and 27 may be respectively different from one another. Although the through holes 13 and 26 are disposed in one line, they may be disposed to form plural lines. Output lines 8 corresponding to output pads of the semiconductor chip 4 are formed on the surface of the first layer 1 by patterning. Since the pitch of the terminals of the panel is longer than the pitch of the output pads of the semiconductor chip 4 , the line pattern is widened on the first layer 1 so that the output pads and the terminals of the panel are aligned to one another. Further, through holes 9 are formed at the leading portions of the output lines 8 so that the output lines 8 pass through the through holes 11 of the second layer 2 and are connected to connection terminals 13 of the panel via through holes 12 of the third layer 3. Although a method of making coinciding the pitch of the pads of the semiconductor chip with the pitch of the terminals of the panel of the multi-layer substrate composed of the three layers is described here, the coincidence may be made over a plurality of layers (two or more layers) in place of making only one layer coincide. Each of the first, second and the third layers 1, 2 and 3 is made of ceramic substrates manufactured by simultaneously sintering alumina bases at low temperature to have a thickness of 0.25 mm. The input lines 5, the output lines 8 and the bus lines 10 are formed by sintering solely or mixture of Au, Ag, AgPd or Cu metal paste. Similarly, the through holes 6, 9, 11, 12, 25, 26 and 30 are formed by sintering Au, Ag, AgPd or Cu metal paste. Also the connection terminals 13 and 27 are respectively formed by sintering solely Au, Ag, AgPd or Cu metal paste or a mixture of two or more of these. The foregoing elements for each layer are formed by a known print patterning method, and the layers are stacked sintered and integrated so that forming of the multi-layer substrate is completed. Each of the metal layers formed by patterning and sintering as described above usually has a thickness of about 0.001 mm to about 0.05 mm. The foregoing thickness may be about 0.05 mm to about 0.2 mm in order to reduce the resistance value. Depending upon the pitch of the lines and upon the dimension accuracy, the input lines 5 and the output lines 8 on the surface of the first layer 1 and the connection terminals 13 and 27 on the third layer 3 may be formed by photolithographic patterning after the Au, Ag, AgPd or Cu metal paste or a mixture paste of two or more of these materials has been printed on the entire surface. In this case, the thickness of the formed pattern is about 0.001 mm to about 0.2 mm. As an alternative to employing the printing method, the pattern may be formed by a photolithographic method or a plating method after Au, Ag or Cu has been evaporated or after the thin film has been formed by sputtering. In this case, the thickness of the formed pattern is about 0.0005 mm to about 0.1 mm. Fig. 12 is an exploded view which illustrates an essential portion in which the multi-layer substrate according to this embodiment shown in Fig. 7 is connected to the liquid crystal display panel. The cross section (section x-x of Fig. 12) of the essential portion of the connection portion is as shown in Fig. 4 similarly to the first embodiment. Connection terminals 18, bus lines 28 and connection terminals 29 to be disposed at the end portions of the bus lines 28 are, by patterning, formed on the panel 16 to correspond to the portion in which the multi-layer substrate 14 will be mounted. The connection terminals 18 and 29 are disposed on one straight line. Although the bus lines 28 are simply illustrated by a continuous line in Fig. 12, they may be arranged to have different pattern widths upon consideration of the circuit resistance and the connection resistance so that the resistance values of the lines are made to be the same. The bus lines 28 on the panel serve as bus lines for establishing the connections between the foregoing multi-layer substrates. The connection terminals 13, the panel terminals 18, the connection terminals 27 and the panel terminals 28 of the multi-layer substrate 14 are connected to one another by connection members 19. The connection members 19 maintain the electrical connections and also act to fix somewhat the multi-layer substrates 14 to the panel. The connection member 19 is made of an anisotropic conductive film mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive film is disposed between the panel terminals 18 and the connection terminals 13 and 27 of the multi-layer substrate 14. If the anisotropic conductive film is a thermo-hardening film or a blend type of a thermoplastic film and a thermo-hardening film, a heating and pressurizing head is abutted against the multi-layer substrate 14 so that the anisotropic film is hardened and connected. If the anisotropic conductive film is an ultraviolet hardening type film, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 29 (adjacent to the glass) to harden the ultraviolet hardening type film. Since the connection terminals 13 and 27 are disposed on one straight line, the pressurizing head may be formed into a simple straight shape so that the connections can be established by using a simple pressurizing and connecting device. Further, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. Alternatively, as the connection member 19, an anisotropic conductive adhesive agent is used which is mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive adhesive agent is a fluid or paste agent and applied to the portion in which the panel terminal 16 is connected by a known method, for example, printing or a dispensing method using a dispenser. If the anisotropic conductive adhesive agent is a thermo-hardening agent or a blended agent of a thermoplastic agent and a thermo-hardening agent, a heating and pressuring head is abutted against the multi-layer substrate 14 so that the agent is hardened and connected. If the anisotropic conductive adhesive agent is an ultraviolet hardening type adhesive agent, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 19 (adjacent to the glass) to harden the ultraviolet hardening type film. Since the connection terminals 13 and 27 are disposed on one straight line, the pressurizing head may be formed into a simple straight shape so that the connections can be established by using a simple pressurizing and connecting device. Further, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. In order to protect the exposed portion of the panel terminals 18, 28 and 29 from corrosion, a molding 21 is placed. The molding 21 also serves to fix the multi-layer substrate 14 to the panel. The molding 21 is made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials of any one of solvent type, thermo-hardening type, or light hardening type or a mixture thereof. As shown in Fig. 4, the multi-layer substrate can be mounted in a compact manner within the outline of the panel 16. As described above, the bus lines formed on the panel to serve as the means for establishing the electrical connections between the multi-layer substrates enables the bus lines to be formed simultaneously with the other lines on the panel. Therefore, an individual forming process does not need to be performed. Further, individual elements such as the heat seal can be omitted. In addition, the fact that the connections of the input and output terminals can be collectively established causes the manufacturing process to be simplified. Fig. 13 illustrates a structure arranged substantially similarly to that according to the embodiment shown in Fig. 12 except for an arrangement in which the connection terminals 13 of the multi-layer substrate 14 are disposed inside the panel 16. The cross section (section Y-Y of Fig. 13) of the essential portion of the connection portion is as shown in Fig. 10 whereby the length of each of lines arranged from the panel terminals 18 to the inside portion of the panel can be shorter than that according to the embodiment shown in Fig. 4. As a result, an effect can be obtained in that the circuit resistance can be reduced. The connection terminals 13, the panel terminals 18, the connection terminals 27 and the panel terminals 28 of the multi-layer substrate 14 are connected to one another by connection members 19. The connection members 19 maintain the electrical connections and also act to fix somewhat the multi-layer substrates 14 to the panel. The connection member 19 is made of an anisotropic conductive film mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive film is disposed between the panel terminals 18 and the connection terminals 13 and 27 of the multi-layer substrate 14. If the anisotropic conductive film is a thermo-hardening film or a blend type of a thermoplastic film and a thermo-hardening film, a heating and pressurizing head is abutted against the multi-layer substrate 14 so that the anisotropic film is hardened and connected. If the anisotropic conductive film is an ultraviolet hardening type film, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 29 (adjacent to the glass) to harden the ultraviolet hardening type film. Since the connection terminals 13 and 27 are disposed on one straight line, the pressurizing head may be formed into a simple straight shape so that the connections can be established by using a simple pressurizing and connecting device. Further, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. Alternatively, as the connection member 19, an anisotropic conductive adhesive agent is used which is mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive adhesive agent is a fluid or paste agent and applied to the portion in which the panel terminal 16 is connected by a known method, for example, printing or a dispensing method using a dispenser. If the anisotropic conductive adhesive agent is a thermo-hardening agent or a blended agent of a thermoplastic agent and a thermo-hardening agent, a heating and pressuring head is abutted against the multi-layer substrate 14 so that the agent is hardened and connected. If the anisotropic conductive adhesive agent is an ultraviolet hardening type adhesive agent, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 19 (adjacent to the glass) to harden the ultraviolet hardening type film. Since the connection terminals 13 and 27 are disposed on one straight line, the pressurizing head may be formed into a simple straight shape so that the connections can be established by using a simple pressurizing and connecting device. Further, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. In order to protect the exposed portion of the panel terminals 18, 28 and 29 from corrosion, a molding 21 is placed. The molding 21 also serves to fix the multi-layer substrate 14 to the panel. The molding 21 is made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materilas of any one of solvent type, thermo-hardening type, or light hardening type or a mixture thereof. As shown in Fig. 10, the multi-layer substrate can be mounted in a compact manner within the outline of the panel 16. As described above, the bus lines formed on the panel to serve as the means for establishing the electrical connections between the multi-layer substrates may be formed simultaneously with the other lines on the panel. Therefore, an individual forming process does not need to be performed. Further, individual elements such as the heat seal can be omitted. In addition, the fact that the connections of the input and output terminals can be collectively established causes the manufacturing process to be simplified. Fig. 14 illustrates a structure arranged similarly to that according to the embodiment shown in Fig. 12 except for an arrangement that the bus lines 28 on the panel are also disposed in an area in the panel that does not affect the display in addition to the area on which the multi-layer substrate 14 will be mounted. Therefore, the area that can be used to form the bus lines 28 can be widened, the width of the bus lines can be enlarged to reduce the circuit resistance while eliminating a necessity of enlarging the area required to mount the multi-layer substrates 14. The reduction in the resistance value of the bus lines enables an effect to be obtained in that the quality of display made by the liquid crystal display apparatus can be improved. The cross section (section Z-Z of Fig. 14) of the essential portion of the connection portion is as shown in Fig. 10. As shown in the drawing, a liquid crystal display apparatus can be provided in which the area required to mount the multi-layer substrate 14 can further be reduced and which exhibits excellent quality of display. The connection terminals 13, the panel terminals 18, the connection terminals 27 and the panel terminals 28 of the multi-layer substrate 14 are connected to one another by connection members 19. The connection members 19 maintain the electrical connections and also act to fix somewhat the multi-layer substrates 14 to the panel. The connection member 19 is made of an anisotropic conductive film mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive film is disposed between the panel terminals 18 and the connection terminals 13 and 27 of the multi-layer substrate 14. If the anisotropic conductive film is a thermo-hardening film or a blend type of a thermoplastic film and a thermo-hardening film, a heating and pressurizing head is abutted against the multi-layer substrate 14 so that the anisotropic film is hardened and connected. If the anisotropic conductive film is an ultraviolet hardening type film, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 29 (adjacent to the glass) to harden the ultraviolet hardening type film. Since the connection terminals 13 and 27 are disposed on one straight line, the pressurizing head may be formed into a simple straight shape so that the connections can be established by using a simple pressurizing and connecting device. Further, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. Alternatively, as the connection member 19, an anisotropic conductive adhesive agent is used which is mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive adhesive agent is a fluid or paste agent and applied to the portion in which the panel terminal 16 is connected by a known method, for example, printing or a dispensing method using a dispenser. If the anisotropic conductive adhesive agent is a thermo-hardening agent or a blended agent of a thermoplastic agent and a thermo-hardening agent, a heating and pressuring head is abutted against the multi-layer substrate 14 so that the agent is hardened and connected. If the anisotropic conductive adhesive agent is an ultraviolet hardening type adhesive agent, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 and 19 (adjacent to the glass) to harden the ultraviolet hardening type film. Since the connection terminals 13 and 27 are disposed on one straight line, the pressurizing head may be formed into a simple straight shape so that the connections can be established by using a simple pressurizing and connecting device. Further, the input/output terminals of the multi-layer substrate 14 can be collectively connected to the corresponding panel terminals 18 and 29 while necessitating only one pressurizing process. In order to protect the exposed portion of the panel terminals 18, 28 and 29 from corrosion, a molding 21 is placed. The molding 21 also serves to fix the multi-layer substrate 14 to the panel. The molding 21 is made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials of any one of solvent type, thermo-hardening type, or light hardening type or a mixture thereof. As shown in Fig. 10, the multi-layer substrate can be mounted in a compact manner within the outline of the panel 16. As described above, the bus lines formed on the panel to serve as the means for establishing the electrical connections between the multi-layer substrates enables the bus lines to be formed simultaneously with the other lines on the panel. Therefore, an individual forming process does not need to be performed. Further, individual elements such as the heat seal can be omitted. In addition, the fact that the connections of the input and output terminals can be collectively established causes the manufacturing process to be simplified. Therefore, a liquid crystal display apparatus, the cost of which can further be reduced, can be provided. As described above, use of the multi-layer substrate according to this embodiment enables the lines to be wired in the cross manner in the same multi-layer substrate as contrasted with the conventional TAB method using individual bus substrate to wire the bus lines in the cross manner. Therefore, the overall size can be reduced as compared with the TAB method by raising the density of the lines wired on the substrate. Further, the cost can be reduced because individual bus lines are not used. Since the conventional COG method has the arrangement that the cross wiring of the bus lines is performed on the panel substrate, a wide area is required to wire the bus lines. Further, metal lines must be used to reduce the resistance value of the wired lines, resulting in an enlargement of the cost. However, use of the multi-layer substrate according to this embodiment enables the space required to wire the bus lines and the cost to be reduced as compared with the COG method. Sixth Embodiment A sixth embodiment of the present invention will now be described with reference to Figs. 15, 16, 17 and 18. Fig. 15 is an exploded perspective view which illustrates a multi-layer substrate according to this embodiment which includes two semiconductor chips for driving liquid crystal face-down bonded thereon. Reference numerals 1, 2 and 3 represent layers of the multi-layer (comprising three layers) substrate composed of a first layer 1, a second layer 2 and a third layer 3. Semiconductor chips 4 and 4' for driving liquid crystal are mounted on the surface of the first layer 1 in the face-down bonding manner by a known method (for example, a method in which an Au bump of the semiconductor is connected to the substrate by using Ag paste or a method in which an anisotropic conductive film is used or a flip chip method in which soldering is performed). After the semiconductor chips 4 and 4' have been bonded as described above, molding members 20 are respectively disposed around the semiconductor chips 4 and 4' and between the semiconductor chips 4 and 4' and the first layer 1 in order to prevent corrosion and reinforce bonding. The molding members 20 are made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materilas in the form of a solvent or thermo-hardening or light hardening type or a mixture thereof. Input lines 5 and 5' corresponding to input pads of the semiconductor chips 4 and 4' are formed on the surface of the first layer 1 by patterning. The input lines 5 and 5' are connected to bus lines 10 of the second layer 2 via through holes 6. Further, lands 7 are formed at the leading portions of the input lines 5 and 5' for wire-bonding with another multi-layer substrate arranged similarly. Output lines 8 and 8' corresponding to output pads of the semiconductor chips 4 and 4' are formed on the surface of the first layer 1 by patterning. Since the pitch of the terminals of the panel is longer than the pitch of the output pads of the semiconductor chips 4 and 4', the line pattern is widened on the first layer 1 so that the output pads and the terminals of the panel are aligned to one another. Further, through holes 9 are formed at the leading portions of the output lines 8 and 8' so that the output lines 8 and 8' pass through the through holes 11 of the second layer 2 and are connected to connection terminals 13 of the panel via through holes 12 of the third layer 3. Each of the first, second and the third layers 1, 2 and 3 is made of ceramic substrates manufactured by simultaneously sintering alumina bases at low temperature to have a thickness of 0.25 mm. The input lines 5 and 5', the output lines 8 and 8' and the bus lines 10 are formed by sintering solely or mixture of Au, Ag, AgPd or Cu metal paste. Similarly, the through holes 6, 9, 11 and 12 are formed by sintering Au, Ag, AgPd or Cu metal paste. Also lands 7 and the connection terminals 13 are respectively formed by sintering solely Au, Ag, AgPd or Cu metal paste or a mixture of two or more of these. The foregoing elements for each layer are formed by a known print patterning method, and the layers are stacked sintered and integrated so that forming of the multi-layer substrate is completed. Each of the metal layers formed by patterning and sintering as described above usually has a thickness of about 0.001 mm to about 0.05 mm. The foregoing thickness may be about 0.05 mm to about 0.2 mm in order to reduce the resistance value. Depending upon the pitch of the lines and upon the dimension accuracy, the input lines 5 and 5', the lands 7, the output lines 8 and 8' on the first layer and connection terminals 13 on the reverse side of the third layer 3 may be formed by photolithographic patterning after the Au, Ag, AgPd or Cu metal paste or a mixture paste of two or more of these has been printed on the entire surface. In this case, the thickness of the formed pattern is about 0.001 mm to about 0.2 mm. As an alternative to employing the printing method, the pattern may be formed by a photolithographic method or a plating method after Au, Ag or Cu has been evaporated or after the thin film has been formed by sputtering. In this case, the thickness of the formed pattern is about 0.0005 mm to about 0.1 mm. The arrangement in which the two semiconductor chips for driving liquid crystal are bonded on one multi-layer substrate enables the input/output lines to be wired efficiently as compared with an arrangement in which one semiconductor chip for driving liquid crystal on one multi-layer substrate. Further, the semiconductor chips can be disposed efficiently. Therefore, the required area for the multi-layer substrate can be reduced and, accordingly, the parts cost can be reduced. Further, the process for exploding (dicing or breaking) the multi-layer substrate and the process for setting/resetting the multi-layer substrate for bonding and molding the semiconductor chip can also be simplified. Therefore, the cost can be reduced. Fig. 16 illustrates an embodiment in which the multi-layer substrate according to an embodiment shown in Fig. 15 is connected to a liquid crystal display panel. Fig. 17 is an enlarged view which illustrates an essential portion of the connection portion. Fig. 18 illustrates the cross section of an essential portion of the connection portion. A liquid crystal display panel (for example, 640 x 480 dot display) 16 has a panel terminal 18 to which 8 multi-layer substrates 14 according to the embodiment shown in Fig. 1 are connected on the direction X thereof and 5 multi-layer substrates 14 on the direction Y thereof. However, four multi-layer substrates 14 on the direction X and five multi-layer substrates 14 on the direction Y are not shown in Fig. 16. The conductive member 19 maintains the electrical connection and also fix somewhat the multi-layer substrate 14 to the panel. The connection member 19 is made of an anisotropic conductive film mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive film is disposed between the panel terminals 18 and the connection terminals 13 of the multi-layer substrate 14. If the anisotropic conductive film is a thermo-hardening film or a blend type of a thermoplastic film and a thermo-hardening film, a heating and pressurizing head is abutted against the multi-layer substrate 14 so that the anisotropic film is hardened and connected. If the anisotropic conductive film is an ultraviolet hardening type film, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 (adjacent to the glass) to harden the ultraviolet hardening type film. Alternatively, as the connection member 19, an anisotropic conductive adhesive agent is used which is mainly composed of conductive particles and an adhesive agent. The conductive particles are sole soldering particles, sole Ni, Au, Ag, Cu, Pb or Sn particles or a mixture or alloy of two or more of these, complex metal particles made by plating, particles formed by plating sole Ni, Co, Pd, Au, Ag, Cu, Fe, Sn or Pb or a mixture of two or more of these materials on plastic particles (polystyrene, polycarbonate or acryl or the like) or carbon particles. The foregoing adhesive agent is a sole styrene butadiene styrene (SBS), epoxy, acryl, polyester or urethane adhesive agent or a mixture or compound of two or more of these materials. The anisotropic conductive adhesive agent is a fluid or paste agent and applied to the portion in which the panel terminal 16 is connected by a known method, for example, printing or a dispensing method using a dispenser. If the anisotropic conductive adhesive agent is a thermo-hardening agent or a blended agent of a thermoplastic agent and a thermo-hardening agent, a heating and pressuring head is abutted against the multi-layer substrate 14 so that the agent is hardened and connected. If the anisotropic conductive adhesive agent is an ultraviolet hardening type adhesive agent, a pressuring head is abutted against the multi-layer substrate 14 and ultraviolet rays are applied to the anisotropic conductive film from a position adjacent to the panel terminals 18 (adjacent to the glass) to harden the ultraviolet hardening type film. In order to protect the exposed portion of the panel terminals 18 from corrosion, a molding 21 is placed. The molding 21 also serves to fix the multi-layer substrate 14 to the panel. The molding 21 is made of sole epoxy, acryl, urethane or polyester material or a mixture or compound of two or more of these materials of any one of solvent type, thermo-hardening type, or light hardening type or a mixture thereof. The bus lines between the adjacent multi-layer substrates 14 are connected by wire bonding performed by using wires 15 via the lands 7. The wires 15 are made of metal, such as Au, Al, or Cu or the like or their alloy (alloy containing Be, Si or Mg or the like included). The width of the portion to be wire-bonded is narrower than the width of the multi-layer substrate so that the multi-layer substrate is mounted within the outline of the panel 16 as shown in Fig. 18. Since the two semiconductor chips are bonded on one multi-layer substrate, the number of connection portions to connect the multi-layer substrates can be decreased by 8 (14 connection portions can be made to be 6 connection portions). Therefore, the number of wires 15 can be reduced and the wire bonding process can be simplified. As described above, use of the multi-layer substrates according to this embodiment enables the lines to be wired in the cross manner in the same multi-layer substrate as contrasted with the conventional TAB method using individual bus substrate to wire the bus lines in the cross manner. Therefore, the overall size can be reduced as compared with the TAB method by raising the density of the lines wired on the substrate. Further, the cost can be reduced because individual bus lines are not used. Since the conventional COG method has the arrangement that the cross wiring of the bus lines is performed on the panel substrate, a wide area is required to wire the bus lines. Further, metal lines must be used to reduce the resistance value of the wired lines, resulting in an enlargement of the cost. However, use of the multi-layer substrate according to this embodiment enables the space required to wire the bus lines and the cost to be reduced as compared with the COG method. Seventh Embodiment A seventh embodiment will now be described with reference to Fig. 19. Fig. 19 is an exploded perspective view which illustrates a multi-layer substrate of a liquid crystal display apparatus according to the present invention in which two semiconductor chips for driving liquid crystal are wire-bonded to the surface of one multi-layer substrate. The surface of the first layer 1 of the multi-layer substrate has input lines 5 and 5' corresponding to input/output pads of the semiconductor chips 4 and 4' for driving liquid crystal. Further, the output lines 8 and 8' have wire bonding lands 22. The pattern, the through holes, the method of forming the multi-layer substrate, the arrangement and the structure are the same as those according to the sixth embodiment. The reverse side of the semiconductor chip is secured to the surface of the multi-layer substrate. Further, the input/output pads of the semiconductor chips 4 and 4' and lands 22 on the surface of the first layer 1 of the multi-layer substrate are wire bonded. The wires may be wires of the same type as those used to connect the multi-layer substrates according to the sixth embodiment. Although omitted from the illustration, the bonding portions and the wiring portions are molded by molding members made similarly to the sixth embodiment. The bus lines between the adjacent multi-layer substrates are wire-bonded similarly to the sixth embodiment. Although omitted from the illustration, the bonding portions and the wiring portions are molded by molding members made similarly to the first embodiment. As described above, use of the multi-layer substrate according to this embodiment also enables the size and the cost to be reduced similarly to the sixth embodiment as compared with the conventional TAB method and the COG method. Eighth Embodiment An eighth embodiment will now be described with reference to Fig. 20. Fig. 20 illustrates a liquid crystal display apparatus according to the present invention in which a multi-layer substrate 14 having two semiconductor chips 4 and 4' for driving liquid crystal face-down-bonded on the surface thereof is connected to the terminal 18 of the liquid crystal display panel by using a connection member 19. An essential portion of the connection portion is arranged to be similar to that according to the embodiment shown in Fig. 18. However, the leading portions of the input lines on the first layer 1 of the multi-layer substrate are formed into heat seals or shapes that are suitable to connect the flexible substrate in place of the wire bonding lands. The bus lines between the adjacent multi-layer substrates 14 are connected by using a connection substrate 24. The connection substrate 24 may be a heat seal or a flexible substrate. The width of a portion to which the connection substrate 24 is connected is smaller than the width of the multi-layer substrate 14 so that the multi-layer substrate 14 can be mounted within the outline of the panel 16. As described above, use of the multi-layer substrate according to this embodiment also enables the size and the cost to be reduced as compared with the conventional TAB method and the COG method. The connection of the semiconductor chips for driving liquid crystal to the surface of the multi-layer substrate and the electrical connection between the adjacent multi-layer substrates may be performed by methods which are the combination of the methods according to the sixth, seventh and the eighth embodiments. In any case, the size and the cost can also be reduced. Further, the multi-layer substrate having the semiconductor chip for use in the foregoing embodiments mounted thereon can be mounted on another display apparatus or an electronic printing apparatus such that it can be mounted on a plasma display or an EL display apparatus by changing the foregoing semiconductor chip to a semiconductor chip for driving the plasma display or a semiconductor chip for driving the EL. By similarly mounting a semiconductor chip for driving a thermal head on the multi-layer substrate and by similarly connecting the multi-layer substrate to the thermal head, application to an electronic printing apparatus can be realized. Ninth Embodiment A ninth embodiment will now be described with reference to Figs. 25, 26 and 27. Fig. 25 is an exploded perspective view which illustrates a liquid crystal display apparatus according to the present invention in which a multi-layer substrate has a semiconductor chip for driving liquid crystal face-down bonded on the surface thereof. Reference numerals 1, 2 and 3 represent layers of the multi-layer (three layer) substrate according to this embodiment. Reference numeral 1 represents a first layer, 2 represents a second layer and 3 represents a third layer. Similarly to the first embodiment, the semiconductor chip 4 for driving liquid crystal is face-down bonded on the surface of the multi-layer substrate. After bonding has been performed, the periphery of the semiconductor chip 4 and portions between the semiconductor chip 4 and the first layer 1 are molded. The first layer 1 has, on the surface thereof, input lines 5 corresponding to the input pads of the semiconductor chip 4 . The input lines 5 are connected to the bus lines 10 of the second layer 2 via through holes 6. The input lines 5 have, at the leading portions thereof, lands 7 for wire-bonding another multi-layer substrate disposed adjacently and formed similarly. Further, output lines 8 corresponding to the output pads of the semiconductor chip 4 are formed on the surface of the first layer by patterning. Since the pitch of the panel terminals is longer than the pitch of the output pads of the semiconductor chip 4 , wiring is performed such that the pattern is widened on the first layer 1 to make the output pads coincide with the panel terminals. Further, through holes 9 are formed at the leading portions of the output lines 8 so that the output lines 8 are connected to the connection terminals 13 formed on the reverse side of the first layer for establishing the connection with the panel. The layers 1, 2 and 3 are ceramic substrates formed by simultaneously sintering alumina substrates at low temperature. Fig. 26 illustrates the cross section of an essential portion of an embodiment in which the multi-layer substrate according to the embodiment shown in Fig. 25 is connected to a liquid crystal display panel. Fig. 27 illustrates an essential portion of an embodiment in which the multi-layer substrate according to the embodiment shown in Fig. 25 is connected to a liquid crystal display panel. As described above, the arrangement of the multi-layer substrate according to this embodiment in which a portion of the multi-layer substrate is removed from the upper surface of the liquid crystal display panel enables the thickness of the liquid crystal display apparatus to be reduced. Further, the multi-layer substrate having the semiconductor chip for use in the foregoing embodiments mounted thereon can be mounted on another display apparatus or an electronic printing apparatus such that it can be mounted on a plasma display or an EL display apparatus by changing the foregoing semiconductor chip to a semiconductor chip for driving the plasma display or a semiconductor chip for driving the EL. By similarly mounting a semiconductor chip for driving a thermal head on the multi-layer substrate and by similarly connecting the multi-layer substrate to the thermal head, application to an electronic printing apparatus can be realized. Tenth Embodiment Another embodiment of the present invention will now be described with reference to Figs. 28, 29 and 30. Figs. 28 and 29 are perspective views which illustrate a liquid crystal display apparatus according to the present invention which comprises a multi-layer substrate according to the embodiment and having a semiconductor chip for driving liquid crystal which is face-down-bonded on to the surface thereof. Although the material and the constitution of the multi-layer substrate according to this embodiment are the same as those of the multi-layer substrate according to First Embodiment, a fastening hole 432 is formed. Although the drawings illustrate the circular fastening hole 432, the shape may be formed into a rectangle, an ellipse, a square or an elongated hole. Fig. 29 illustrates the liquid crystal display apparatus making use of multi-layer substrates 14 and 431a to 431d shown in Figs. 28 and 29. The multi-layer substrates 14 and 431a to 431d having the semiconductor chips 4 mounted on the surfaces thereof are connected to a panel 16. The panel 16, a member formed by integrating a backlight unit 435 and an exterior decoration case 436 and an exterior decoration case 433 are, by a fixing screw 434, fixed to the multi-layer substrates 431a to 431d by way of the fastening hole 432. As a result, the exterior decoration case of the liquid crystal display apparatus according to the present invention is able to also serve as the exterior case of a PC (Personal Computer) or the like. Therefore, the elements, such as the frame and the metal frame and the like that have been required for the conventional liquid crystal display apparatus as individual elements, can be omitted. As a result, the cost of the elements can be reduced. Further, the number of assembling processes can be simplified and the number of machining processes can be decreased. Although the multi-layer substrates 14 and 431a to 431d and the panel terminal 18 are, similarly to First Embodiment, connected to one another by an adhesive member 19 and bonded and reinforced by a mold 21, the mold 21 may be provided for the side surfaces or the reverse surfaces of the panel 18 and the multi-layer substrates 14 and 431a to 431d in order to improve the strength (strength against vibrations) realized after the foregoing elements have been assembled into the frame. The mold 21 is made of a material selected from a group consisting of epoxy, acrylic, urethane and polyester compound or a mixture of two or more of these of a solvent, a photo-setting or a mixture type thereof. Since the positional accuracy between the pattern of the multi-layer substrate and the fastening cut portion can be made to be ± 0.1 mm or less, the positional accuracy between the panel pattern and the fastening hole can be maintained at ± 0.2 mm or less. Since the foregoing fastening hole is used to assemble the elements to the exterior decoration case 436 which is the case, the position reproducibility with respect to the backlight unit 435 and that of the exterior decoration case 433 with respect to a panel display can be maintained and improved. Further, the elements can be reworked and reassembled easily if the fastening screw 434 is used to assemble the elements. If a plastic and rivet-like element having a flange is used, assembling and fixing can be performed by simply pushing the rivet-like element. Therefore, assembling can easily be performed. The backlight 435 and the exterior decoration case 436 may be fixed by a method using a double-coated tape or a fastening claw. Eleventh Embodiment Another embodiment of the present invention will now be described with reference to Figs. 31, 32 and 33. As shown in Figs. 31 and 33, the sizes of the multi-layer substrates 437a to 437d are designed to be larger than that of the end surface of a glass terminal 18 so that the fastening cut portion is made project over the end surface of the glass terminal 18 and it is fixed. Although the material and the structure of the multi-layer substrate are the same as those of the multi-layer substrate according to First Embodiment, the fastening cut portion 438 is formed. Although the fastening cut portion 438 is formed into a semicircular shape in this embodiment, it may be formed into a partial or full rectangle, square, rhomboid, ellipse or an elongated hole. If the fastening cut portion is disposed at the central portion of the multi-layer substrates 437a to 437d to form the shape to be laterally symmetrical with respect to the central line in the direction of the longitudinal side of the multi-layer substrate, the standardization of the elements can be realized such that the four different elements can be replaced by four same elements. Fig. 32 illustrates a liquid crystal display apparatus according to the present invention that makes use of the multi-layer substrates 437a to 437d shown in Fig. 31. The multi-layer substrates 14 and 437a to 437d having the semiconductor chips 4 mounted on the surfaces thereof are connected to a panel 16. The panel 16, a member formed by integrating a backlight unit 435 and an exterior decoration case 436 and an exterior decoration case 433 are, by a fixing screw 434, fixed to the multi-layer substrates 431a to 431d by way of the fastening cut portion 438. As a result, the exterior decoration case of the liquid crystal display apparatus according to the present invention is able to also serve as the exterior case of a PC (Personal Computer) or the like. Therefore, the elements, such as the frame and the metal frame and the like that have been required for the conventional liquid crystal display apparatus as individual elements, can be omitted. Further, the standardization of the elements can be realized by forming the fastening cut portions 438 of the multi-layer substrates 437a to 437d to be in a uniform shape. As a result, the cost of the elements can be reduced. Further, the assembling processes can be simplified and the number of machining processes can be decreased because the number of elements can be decreased. Fig. 33 illustrates the cross section of a portion in which the multi-layer substrates 437a to 437d of the liquid crystal display apparatus according to the present invention are connected. Although the multi-layer substrates 14 and 437a to 437d and the panel terminal 18 are bonded and reinforced by an adhesive member 19 and a mold 21, the mold 21 may be provided for the end surface of the panel terminal 18 and the side surfaces or the reverse surfaces of the multi-layer substrates 14 and 437a to 437d in order to improve the strength (strength against vibrations) realized after the foregoing elements have been assembled into the frame. The mold is made of a material selected from a group consisting of epoxy, acrylic, urethane and polyester compound or a mixture of two or more of these of a solvent, a photo-setting or a mixture type thereof. Since the positional accuracy between the pattern of the multi-layer substrate and the fastening cut portion can be made to be ± 0.1 mm or less, the positional accuracy between the panel pattern and the fastening cut portion can be maintained at ± 0.2 mm or less. Since the foregoing fastening hole is used to assemble the elements to the exterior decoration case 436 which is the case, the position reproducibility with respect to the backlight unit 435 and that of the exterior decoration case 433 with respect to a panel display can be maintained and improved. Further, the elements can be reworked and reassembled easily if the fastening screw 434 is used to assemble the elements. If a plastic and rivet-like element having a flange is used, assembling and fixing can be performed by simply pushing he rivet-like element. Therefore, assembling can easily be performed. The backlight 435 and the exterior decoration case 436 may be fixed by a method using a double-coated tape or a fastening claw. As described above, the present invention is arranged so that the input and output lines of the semiconductor device, the bus lines and the connection terminals are formed on the laminated substrate, and a plurality of semiconductor devices are mounted and connected to the electrodes of the display device. Therefore, the drive control circuit substrate can be omitted, and the number of the mutual connection lines for the semiconductor devices can be decreased. Therefore, the reliability can be improved and the size of the apparatus can be reduced. Further, semiconductor device outputs are supplied for corresponding colors so that an effect can be obtained in that the quality of display can be improved. Although the invention has been described in its preferred form with a certain degree of particularly, it is understood that the present disclosure of the preferred form has been changed in the details of construction and the combination and arrangement of parts may be resorted to without departing from the scope of the attached claims.

Claims: A liquid crystal display apparatus comprising a liquid crystal panel (16) and a plurality of semiconductor chips (4) for driving the panel, said liquid crystal panel having a base substrate carrying panel terminals (18) for connection to said semiconductor chips, said semiconductor chips being mounted on said base substrate, characterized by at least one multi-layer substrate (14) mounted on said base substrate and having at least one of said semiconductor chips (4) mounted thereon, said multi-layer substrate including a first layer (1) and a second layer (3), at least one intermediate layer (2) between said first and second layers, output terminal lands (13) and first and second groups of input terminal lands (7; 27), the surface of said first layer (1) remote from said at least one intermediate layer (2) having an output line pattern (8) and an input line pattern (5) formed thereon, said input line pattern comprising first and second groups of input lines separately provided on said surface and connected to input terminals of said at least one semiconductor chip (4) on the one hand and to said first and second groups of input terminal lands (7; 27), respectively, on the other hand, and said output line pattern (8) being connected to output terminals of said at least one semiconductor chip (4) on the one hand and to said output terminal lands (13) on the other hand, and said at least one intermediate layer (2) having bus lines (10) formed thereon, each bus line interconnecting, via through holes (6; 6, 25, 26; 6, 25, 30, 26), a respective pair of input lines (5), each pair including one input line from each group. The apparatus according to claim 1, wherein said output terminal lands (13) are formed on the surface of said second layer (3) remote from said at least one intermediate layer (2) and are connected to said output line pattern (8) via through holes (9, 11, 12). The apparatus according to claim 2, wherein a plurality of said semiconductor chips (4) are mounted on said at least one multi-layer substrate (14). The apparatus according to claim 2 or 3, wherein said semiconductor chip (4) or said plurality of semiconductor chips are face-down bonded or wire-bonded to said input line pattern (5) and said output line pattern (8) on the surface of said multi-layer substrate (14). The apparatus according to claim 1, wherein said output terminal lands (13) are formed on the surface of said first layer (1) facing said at least one intermediate layer (2) and are connected to said output line pattern (8) via through holes (9, 11, 12), said at least one intermediate layer (2) and said second layer being smaller than said first layer (1) so as to expose said output terminal lands (13). The apparatus according to any one of the preceding claims, wherein an anisotropic conductive film (19, 31) is provided for electrical connection between said output terminal lands (13) and said panel terminals (18). The apparatus according to any one of the preceding claims comprising a plurality of said multi-layer substrates (14) electrically connected to each other by wire bonding, a heat seal connection or a flexible substrate connection. The apparatus according to any one of claims 1 to 6 wherein said input terminal lands (27) are provided on the surface of said second layer (3) remote from said at least one intermediate layer (2) and are connected to said input line pattern (5) via through holes (6, 25, 26). The apparatus according to claim 8 comprising a plurality of said multi-layer substrates (14) electrically connected to each other by lines (28) provided on said base substrate. The apparatus according to claim 9, wherein said lines (28) are disposed in a portion of said base substrate carrying said panel terminals (18) and on the inside of a panel cell. The apparatus according to claim 9 or 10, wherein the connection between said lines (28) on said base substrate and said input terminal lands (27) of said multi-layer substrate and the connection between said output terminal lands (13) of said multi-layer substrate and said panel terminals (18) are established by gang bonding. The apparatus according to claim 11, wherein said connection is established by an anisotropic conductive film (19, 31). The apparatus according to claim 12, wherein said anisotropic conductive film (31) comprises an adhesive agent layer (33) and conductive particles (32) dispersed therein, the thickness of the adhesive agent layer being smaller than the particle size of the conductive particles. The apparatus according to claim 1 wherein a projection or a pit is provided in at least a portion of a side of said at least one multi-layer substrate. The apparatus according to claim 1 wherein an arbitrary one of the plural layers of said multi-layer substrate is smaller than the other layers. The apparatus according to claim 1 wherein said multi-layer substrate (431a-431c; 437a-437c) has a fastening hole (432) or a fastening cut portion (438) formed therein.

Inventors: FURUICHI KAZUAKI, KAMIMURA MASARU, MAEDA KINICHI, MARUYAMA KENICHI, MURAMATSU EIJI, SAKURA SEIICHI, UCHIYAMA KENJI, YAMADA SHIGETOSHI, FURUICHI, KAZUAKI, KAMIMURA, MASARU, MAEDA, KINICHI, MARUYAMA, KENICHI, MURAMATSU, EIJI, SAKURA, SEIICHI, UCHIYAMA, KENJI, YAMADA, SHIGETOSHI, Furuichi, Kazuaki, c/o Seiko Epson Corporation, KAMIMURA, MASARU, C/O SEIKO EPSON CORPORATION, Maeda, Kinichi, c/o Seiko Epson Corporation, Maruyama, Kenichi, c/o Seiko Epson Corporation, MURAMATSU, EIJI, C/O SEIKO EPSON CORPORATION, Sakura, Seiichi, c/o Seiko Epson Corporation, Uchiyama, Kenji, c/o Seiko Epson Corporation, Yamada, Shigetoshi, c/o Seiko Epson Corporation
Applicants: SEIKO EPSON CORP, SEIKO EPSON CORPORATION
Application year: 1993
Main classification: G02F1
IPC codes: H05K3, H01L25, H01L23, G02F1, H05K1