Patent Description:
In the conventional manufacturing procedure of electronic device (e.g. display), the semiconductor manufacturing process is performed to obtain individual semiconductor devices, which are then transferred onto a carrier substrate. Afterwards, a pick-up head is enabled to grab one or more semiconductor devices and to transfer the grabbed semiconductor devices onto a circuit board for performing the following manufacturing processes. However, the above manufacturing process needs a relatively expensive equipment, so that the manufacturing cost for the electronic device becomes higher. Besides, the density of the electronic devices can be limited due to the production accuracy of the equipment.

<CIT> describes a flexible display apparatus which includes a plurality of pixels on a display area of a flexible substrate. A pad area is on a non-display area of the flexible substrate. A driving integrated circuit is electrically connected to the pad area. A support layer is on a surface of the flexible substrate opposite to a surface facing the driving integrated circuit. An adhesion layer attaches the support layer to the substrate. The adhesion layer has a first thickness in an area corresponding to the driving integrated circuit, and a second thickness in another area. The second thickness is less than the first thickness.

<CIT> describes an organic EL display device with a plastic substrate having flexibility, and an organic EL display element formed on the plastic substrate. The organic EL display device has a display region and a frame region disposed at the periphery of the display region. On the display region, a deformation preventing member which eliminates deformation of the display region is disposed.

<CIT> describes a flexible organic light-emitting display device having a thin film encapsulation structure. The flexible organic light-emitting display device can be manufactured by a method including sequentially stacking a glass substrate, a first flexible substrate in which conductive particles are integrally dispersed, a display unit comprising a thin film transistor (TFT) layer and a light-emitting layer, and a second flexible substrate. The glass substrate can then be separated from the first flexible substrate by emitting light.

<CIT> describes a flat panel display includes a substrate having a pixel region and a non-pixel region, the substrate having a transistor in the pixel region and a pad in the non-pixel region, a first planarizing layer in the pixel region covering the transistor and including a via hole exposing a portion of the transistor, and a second planarizing layer in the non-pixel region and having a pad contact hole opening the pad, the second planarizing layer being thinner than the first planarizing layer.

<CIT> describes an imaging device which includes a substrate, a plurality of pixel electrodes, a conductive line that is disposed between the substrate and the plurality of pixel electrodes, a common electrode portion facing the plurality of pixel electrodes, a plurality of photoelectric conversion portions each of which is disposed between a corresponding one of the plurality of pixel electrodes and the common electrode portion, and a pad portion that is used for supplying an electric potential to the common electrode portion from the outside. The pad portion includes an electroconductive film that is included in the common electrode portion.

<CIT> describes attaching integrated circuit (IC) packages to printed circuit boards (PCBs) to form smooth solder joints. A polymer flux may be provided in the process to mount an IC package to a PCB. The polymer flux may be provided on connectors of the IC package, or provided on PCB contact pad and/or pre-solder of the PCB. When the IC package is mounted onto the PCB, the polymer flux may cover a part of the connector, and may extend to cover a surface of the molding compound on the IC package. The polymer flux may completely cover the connector as well. The polymer flux delivers a fluxing component that facilitates smooth solder joint formation as well as a polymer component that offers added device protection by encapsulating individual connectors.

Document <CIT> discloses a method of manufacturing a display of the kind of the present application comprising providing a substrate, forming thin film devices and thin film lines on the substrate and mounting and connecting by SMT SMDs on pads on the thin film lines.

Document <CIT> discloses a method of manufacturing a display of the kind of the present application comprising providing a substrate on a carrier plate, forming devices and thin film lines on the substrate and mounting and connecting SMDs on pads on the thin film lines and removing the carrier plate.

An objective of this disclosure is to provide a method of manufacturing an electronic device that can achieve a higher component density for the electronic devices.

This object is achieved by a method according to claim <NUM>.

In one embodiment, the flexible substrate comprises an organic polymer material, and a glass transition temperature of the organic polymer material is between <NUM> and <NUM>.

In one embodiment, a width of the conductive line is between <NUM> microns and <NUM> microns.

In one embodiment, the thin-film device is a semiconductor device.

In one embodiment, the electronic device includes a plurality of thin-film devices forming a sensing pixel array.

In one embodiment, the electronic device includes a plurality of thin-film devices and a plurality of SMDs, and the thin-film devices and the SMDs form a sensing pixel array.

In one embodiment, the thin-film device includes at least a thin-film transistor, and the SMD includes at least an LED chip.

In one embodiment, the electronic device is a fingerprint sensor, an X-ray sensor, or an LED display.

In one embodiment, the flexible substrate is disposed by gluing or dispensing and is then cured so as to be formed on the rigid carrier plate.

In one embodiment, the electrical connection pad is formed by a plating, printing, or evaporation process and a lift-off patterning process.

In one embodiment, the thin film process to form the conductive line includes a low-temperature polycrystalline silicon process, an amorphous silicon process, or a metal oxide semiconductor process.

The disclosure will become more fully understood from the detailed description and accompanying drawings, which are given for illustration only, and thus are not limitative of the present disclosure, and wherein:.

The present disclosure will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.

<FIG> is a flow chart of a manufacturing method of an electronic device according to an embodiment of the disclosure. The "electronic device" in the following embodiments can be an LED display, a micro-LED display, a sensing device (e.g. fingerprint sensor, fingerprint reader, or an X-ray sensor), a semiconductor device, or an illumination device, and this disclosure is not limited thereto.

As shown in <FIG>, the manufacturing method of the electronic device <NUM> includes the following steps of: forming a flexible substrate on a rigid carrier plate (step S01); forming at least a thin-film device directly on the flexible substrate (step S02); forming a conductive line directly on the flexible substrate, wherein the conductive line is directly electrically connected with the thin-film device (step S03); forming at least an electrical connection pad on the flexible substrate, forming solder on the pad, wherein the electrical connection pad is electrically connected with the conductive line, and a thickness of the electrical connection pad is between <NUM> microns and <NUM> microns (step S04); disposing at least a surface-mount device (SMD) in the active region of the substrate by surface mount technology, SMT, on the flexible substrate, wherein the SMD is electrically connected with the thin-film device through the electrical connection pad and the conductive line (step S05); and removing the rigid carrier plate (step S06).

The details of the steps S01 to S06 will be described with reference to <FIG> in view of <FIG> are schematic diagrams showing the manufacturing procedures of the electronic device <NUM> according to an embodiment of the disclosure.

As shown in <FIG>, the step S01 is to form a flexible substrate <NUM> on a rigid carrier plate <NUM>. The rigid carrier plate <NUM> can be made of a transparent or non-transparent material such as, for example but not limited to, a glass plate, a ceramic plate, a metal plate, or a quartz plate. In this embodiment, the rigid carrier plate <NUM> is a glass plate. In addition, the flexible substrate <NUM> is flexible and includes organic polymer material, and a glass transition temperature (Tg) of the organic polymer material is between <NUM> and <NUM>. Since the organic polymer material has a relative higher glass transition temperature, the characteristics of the flexible substrate <NUM> can be maintained in the following manufacturing processes. The organic polymer material can be a thermal solidification material, such as polyimide (PI), polyethylene (PE), polyvinylchloride (PVC), polystyrene (PS), acrylic, fluoropolymer, polyester, or nylon. In this embodiment, the material of the flexible substrate <NUM> is polyimide (PI).

The material of the flexible substrate <NUM> is disposed on the rigid carrier plate <NUM> by gluing or dispensing, and then cured (by thermal solidification or light curing) to form the flexible substrate <NUM> on the rigid carrier plate <NUM>. In this embodiment, an adhesive layer <NUM> is applied on the rigid carrier plate <NUM>, and then the flexible substrate <NUM> is attached on the adhesive layer <NUM>. After the following laminating process and curing process, the flexible substrate <NUM> can be formed on the rigid carrier plate <NUM>. The material of the adhesive layer <NUM> can be, for example but not limited to, epoxy or silane coupling agent (SCA). Alternatively, if flexible substrate <NUM> can also be formed by dispensing. In practice, the organic polymer material is applied on the rigid carrier plate <NUM>. After curing the organic polymer material, a layer of flexible substrate <NUM> can be formed on the rigid carrier plate <NUM>. In this case, the adhesive layer is not needed.

As shown in <FIG>, the step S02 is to form at least a thin-film device <NUM> directly on the flexible substrate <NUM> by a thin-film process. In this step, the thin-film process can be a semiconductor process, and the thin-film device <NUM> is a semiconductor device, which is directly formed and disposed on the flexible substrate <NUM>. In some embodiments, the thin-film device <NUM> can be, for example but not limited to, a TFT transistor, a photo transistor, a diode, an LED, a µLED, an OLED, a photo diode, a capacitor, a voltage controlled capacitor, a resistor, a photo resistor, a thermal resistor, or any combination thereof. In addition, the thin-film process can include a low-temperature polycrystalline silicon (LTPS) process, an amorphous silicon (a-Si) process, or a metal oxide semiconductor process (e.g. IGZO), and this disclosure is not limited thereto.

Next, the step S03 is to form a conductive line <NUM> on the flexible substrate <NUM>. Herein, the conductive line <NUM> is directly electrically connected with the thin-film device <NUM>, and a width of the conductive line <NUM> is between <NUM> microns and <NUM> microns. The conductive line <NUM> can be a single-layer structure or a multilayer structure made of a metal material (e.g. aluminum, copper, silver, molybdenum, or titanium) or an alloy. Moreover, the conductive line <NUM> is formed by a thin film process, so that the conductive line <NUM> and the thin-film device <NUM> can be formed by the same thin film process. In this embodiment, the conductive line <NUM> and the conductive layer of the thin film device <NUM> can be formed by the same process or the same material. The conductive line <NUM> is directly electrically connected with the thin-film device <NUM>. Alternatively, the conductive line <NUM> can be configured to electrically connect two thin-film devices <NUM>. In this embodiment, two conductive lines <NUM> are formed on the flexible substrate <NUM>, and one of the conductive lines <NUM> is electrically connected with the thin-film device <NUM>.

As shown in <FIG>, the step S04 is to form at least an electrical connection pad <NUM> on the flexible substrate <NUM>. The electrical connection pad <NUM> is electrically connected with the conductive line <NUM>. In this embodiment, two electrical connection pads <NUM> are configured corresponding to the two conductive lines <NUM>, respectively, and the electrical connection pads <NUM> are electrically connected to the conductive lines <NUM>, respectively. The material of the electrical connection pads <NUM> can be, for example but not limited to, copper, silver, gold, or any combination thereof.

In order to easily bond and connect the SMD <NUM> and the electrical connection pad <NUM>, the thickness d of the electrical connection pad <NUM> must be thinker such as between <NUM> microns and <NUM> microns. For manufacturing the thicker electrical connection pad <NUM>, in some embodiments, the electrical connection pad <NUM> can be formed on the conductive line <NUM> by a plating, printing, or evaporation process and a lift-off patterning process. In some embodiments, the electrical connection pad <NUM> can be formed by the thin-film process. The conductive line <NUM> and the electrical connection pad <NUM> can be different layers or the same layer during the manufacturing process. In addition, the step S04 for forming the electrical connection pad <NUM> and the step S02 for forming the thin-film device <NUM> can be changed. In other words, the step S04 for forming the electrical connection pad <NUM> can be earlier than the step S02 for forming the thin-film device <NUM>, and this disclosure is not limited.

As shown in <FIG>, in order to connect the SMD <NUM> and the electrical connection pad <NUM>, a conductive member <NUM> must be disposed on the electrical connection pad <NUM> before the step S05 for disposing the SMD <NUM>. In this embodiment, the material of the conductive member <NUM> can be, for example but not limited to, a solder or an adhesive material. The adhesive material can be optionally selected according to the connecting method. For example, when the SMD <NUM> is bonded by the light curing method (e.g. UV light), the adhesive material can be an UV glue. When the SMD <NUM> is bonded by the thermal solidification method, the adhesive material can be a thermal solidification adhesive material such as a film type adhesive material (e.g. anisotropic conductive film (ACF)), or anisotropic conductive paste (ACP).

Afterwards, the step S05 is performed to dispose at least a surface-mount device (SMD) <NUM> on the flexible substrate <NUM>. The SMD <NUM> is electrically connected with the thin-film device <NUM> through the electrical connection pad <NUM> and the conductive line <NUM>. Herein, the SMD <NUM> is disposed on the conductive member <NUM> by the surface-mount technology (SMT), so that the SMD <NUM> can be electrically connected with the electrical connection pad <NUM> through the conductive member <NUM>. The SMD <NUM> is, for example but not limited to, a two-electrode device such as, for example but not limited to, an LED, a µLED, a photo diode, or an image sensor. Of course, the SMD <NUM> can also be a three-electrode device (e.g. transistor), an IC (e.g. CPU), an active component, a passive component, a connector, or an SMD with another function, and this disclosure is not limited thereto. The SMD <NUM> of this disclosure includes two LED <NUM> and <NUM>, which have two electrodes. In some embodiments, the conductive member <NUM> is made of a solder material, which can be fused by heat. Thus, the electrode <NUM> of the SMD <NUM> can be electrically connected with the thin-film device <NUM> through the conductive member <NUM>, the electrical connection pad <NUM>, and the conductive line <NUM>. In addition, another electrode <NUM> of the SMD <NUM> can be electrically connected with another conductive line <NUM> through another conductive member <NUM> and another electrical connection pad <NUM>. For example, the another conductive line <NUM> can be connected to a ground terminal, a power source terminal, or another thin-film device. In this embodiment, the SMD <NUM> is disposed on the flexible substrate <NUM> by SMT, so that the convention chip transferring process is not needed. As a result, the manufacturing process of this disclosure is simpler and cheaper.

Finally, as shown in <FIG>, the step S06 is to remove the rigid carrier plate <NUM>. In this step, the rigid carrier plate <NUM> can be removed by laser lift-off or machine lift-off. Afterwards, the adhesive layer <NUM> is also removed so as to obtain the SOF (system on film) electronic device <NUM>.

In this embodiment, the electronic device <NUM> includes a flexible circuit board <NUM>, at least one thin-film device <NUM>, and at least one SMD <NUM>. The conductive line <NUM> is disposed on the flexible substrate <NUM>. The electrical connection pad <NUM> is disposed on the flexible substrate <NUM> and electrically connected with the conductive line <NUM>. A thickness of the electrical connection pad <NUM> is between <NUM> microns and <NUM> microns. The thin-film device <NUM> is disposed on the flexible substrate <NUM> and electrically connected with the conductive line <NUM>. The SMD <NUM> is disposed on the flexible substrate <NUM> and is electrically connected with the thin-film device <NUM> through the electrical connection pad <NUM> and the conductive line <NUM>. The thin-film device <NUM> and the conductive line <NUM> are formed on the flexible substrate <NUM> by the thin-film process, and the SMD <NUM> is disposed by SMT and electrically connected with the thin-film device <NUM> through the electrical connection pad <NUM> and the conductive line <NUM>. Accordingly, it is possible to manufacture many fine layouts and components, thereby increasing the component density of the electronic device <NUM>.

<FIG> is a schematic diagram showing an electronic device <NUM> according to another embodiment not forming part of the present invention. The electronic device <NUM> can be a fingerprint sensor or an X-ray sensor. In this embodiment, the electronic device <NUM> is a fingerprint sensor and is fabricated by the above-mentioned manufacturing method.

In this embodiment, the electronic device <NUM> includes a flexible circuit board <NUM>, a plurality of thin-film devices <NUM>, and at least one SMD <NUM>. The SMD <NUM> is disposed on the flexible substrate <NUM> and electrically connected with the thin-film devices <NUM> (the conductive line and electrical connection pad are not shown). In this embodiment, the flexible substrate <NUM> of the flexible circuit board <NUM> includes an active region A1 and a periphery region A2. The thin-film devices <NUM> are located in the active region A1, and the SMD <NUM> is located in the periphery region A2 for driving the thin-film devices <NUM>. The region of the flexible substrate <NUM> other than the active region A1 is defined as the periphery region A2. In other embodiments, the thin-film devices <NUM> can be located in the periphery region A2, and the SMD <NUM> is located in the active region A1. The thin-film devices <NUM> are configured to drive the SMD <NUM>. This disclosure is not limited. In addition, a protection layer <NUM> can be provided to cover the thin-film devices <NUM> and the SMD <NUM> for preventing the contamination and damage of the thin-film devices <NUM> or the SMD <NUM>.

In this embodiment, the thin-film devices <NUM> are fingerprint identical devices, which can form a sensing pixel array <NUM> (fingerprint sensing pixel array). In addition, the SMD <NUM> is configured to drive the sensing pixel array <NUM> within the active region A1. When a finger presses or is positioned on the protection layer <NUM> over the sensing pixel array <NUM> (the active region A1), the sensing pixel array <NUM> and the SMD <NUM> can detect and identify the fingerprint.

<FIG> is a schematic diagram showing an electronic device <NUM> according to another embodiment of the disclosure. In this embodiment, the electronic device <NUM> is an active matrix LED display device, which can be fabricated by the above-mentioned manufacturing method.

In this embodiment, the electronic device <NUM> includes a flexible circuit board (not shown), a plurality of thin-film devices <NUM>, and a plurality of SMDs <NUM>. The thin-film devices <NUM> and the SMDs <NUM> are disposed on the flexible substrate <NUM> and electrically connected with each other (the conductive line and electrical connection pad are not shown). In addition, the electronic device <NUM> further includes a scan drive circuit <NUM>, a data drive circuit <NUM>, a plurality of scan lines, and a plurality of data lines. The data lines and scan lines are disposed on the flexible substrate <NUM>. The scan drive circuit <NUM> is electrically connected with the thin-film devices <NUM> through the scan lines, and the data drive circuit <NUM> is electrically connected with the thin-film devices <NUM> through the data lines. The scan drive circuit <NUM> or the data drive circuit <NUM> can include at least one IC chip, which can be disposed on the flexible substrate <NUM> by flip-chip technology (e.g. COF). Alternatively, the scan drive circuit <NUM> or the data drive circuit <NUM> can be directly formed on the flexible substrate <NUM> by the thin-film process. This disclosure is not limited.

In this embodiment, the flexible circuit board, the thin-film devices <NUM>, the SMDs <NUM>, the scan lines, and the data lines form an active matrix circuit. The thin-film devices <NUM> include at least one thin-film transistor, and the SMDs <NUM> include at least one LED chip or µLED chip. The flexible substrate <NUM> has an active region A1, and the thin-film devices <NUM> and the SMDs <NUM> are located within the active region A1 to form a display pixel array. In this case, each pixel includes one thin-film device <NUM> and one SMD <NUM>. In other words, the LED chip (or µLED chip) of each SMD <NUM> can have different designs. For example, each SMD <NUM> can be configured with a single LED chip (or µLED chip) or several LED chips of different colors (e.g. R, G and B LED chips or µLED chips). In addition, each SMD <NUM> can also be configured with four chips with three colors (e.g. RRGB, or WRGB). This disclosure is not limited.

<FIG> is a schematic diagram showing the circuit of three adjacent pixels P1~P3 in an electronic device <NUM> according to an embodiment of the disclosure.

In the embodiment as shown in <FIG>, each SMD <NUM> includes an LED chip of one color. In this case, the SMD <NUM> of the pixel P1 is a red LED chip (R), the SMD <NUM> of the pixel P2 is a green LED chip (G), and the SMD <NUM> of the pixel P3 is a blue LED chip (B). Moreover, one end of each LED chip (SMD <NUM>) is connected to a power source VS, and the other end thereof is connected to the thin-film device <NUM>.

In each pixel (e.g. the pixel P1), the thin-film <NUM> is electrically connected to one scan line S1, one data line D1, and one SMD <NUM> (LED chip). To be noted, the LED chip of this embodiment is an inorganic LED device, which is different from the LED manufactured by the conventional thin-film process. The LED chip is tested product and disposed on the flexible substrate <NUM> by SMT. Accordingly, the shape or size of the LED chip can be designed as the requirement of the user. Besides, the finished electronic devices <NUM> can have a lower production cost and a higher production yield than the display devices manufactured by the conventional thin-film process.

In the pixels P1, P2 and P3, the data lines D1, D2 and D3 can receive a data signal, respectively, for individually controlling the corresponding SMDs <NUM> (LED chips). In other embodiments, one thin-film device <NUM> can control a plurality of SMDs <NUM>. In addition, the thin-film device <NUM> of each of the pixels P1, P2 and P3 includes at least one switch transistor M, a driving transistor T, and a capacitor C. In this embodiment, the thin-film device <NUM> has a 2T1C structure. Of course, the thin-film device <NUM> can have another circuit structure, such as a 4T2C or 5T1C structure. The circuit structure of the pixel P1 will be described hereinafter for an example.

In the pixel P1, the gate of the switch transistor M is connected to the scan line S1, the first terminal M1 of the switch transistor M is connected to the data line D1, which is connected to the pixel P1, and the second terminal M2 of the switch transistor M is connected to the gate of the driving transistor T and one terminal of the capacitor C. In addition, the first terminal T1 of the driving transistor T is connected to the LED chip (R), which is electrically connected to the pixel P1, and the second terminal T2 of the driving transistor T and the second terminal of the capacitor C are grounded. In this embodiment, the thin-film device <NUM> is a current control circuit of the LED chip. When the scan line S1 is driven and conducted, the data line D1 can transmit a data signal for controlling the luminance of the LED chip (R), which is connected to the first terminal T1 of the driving transistor T. Similarly, the data line D2 can transmit another data signal for controlling the luminance of the LED chip (G), and the data line D3 can transmit another data signal for controlling the luminance of the LED chip (B). In this embodiment, the data signal can be an analog signal or a digital signal.

In addition, if the LED chips of the above-mentioned electronic device <NUM> are LEDs for emitting a single color (e.g. blue light), the manufactured electronic device <NUM> will be a monochrome display panel.

In the electronic device <NUM> of this embodiment, when the scan lines are individually conducted, the thin-film devices <NUM> can receive the data signals from the data lines, respectively, so as to control the luminance statuses of LED chips of the SMDs <NUM>. In practice, the thin-film devices <NUM> can control the luminance statuses of LED chips of the SMDs <NUM> by controlling the duty cycles or current values of the SMDs <NUM>. In other words, the thin-film devices <NUM> can control the luminance statuses of LED chips of the SMDs <NUM> by controlling the conducting time or conducting current of the LED chips of the SMDs <NUM>.

Regarding the conventional passive matrix LED display device, the driving method of the LEDs makes the lighting time become shorter, so the effective luminance is lower and the instantaneous current is higher. Accordingly, the requirement for the frequency of the scan signals is more critical. In order to achieve a higher luminance, the size of the LEDs as well as the entire display device will be larger. On the contrary, the electronic device <NUM> of this embodiment is an active matrix LED display device. The thin-film devices <NUM> and the SMDs <NUM> are disposed on the flexible substrate <NUM>, and the SMDs <NUM> are electrically connected with the thin-film devices <NUM> through the electrical connection pads and conductive lines (not shown). Accordingly, the smaller driving current can achieve the same luminance, and the size of the LED chips can be smaller. Thus, the size and manufacturing cost of the electronic device <NUM> are lower, but the electronic device <NUM> still has a higher product reliability.

<FIG> is a top view of an electronic device <NUM> according to another embodiment not forming part of the present invention, and <FIG> is a side view of the electronic device <NUM> of <FIG>.

As shown in <FIG>, the electronic device <NUM> includes a flexible circuit board <NUM>, at least one thin-film device, and at least one SMD. The thin-film device is disposed on the active region A1 of the flexible substrate <NUM>, and the SMD is disposed on the periphery region A2 of the flexible substrate <NUM> and electrically connected to the thin-film device through the electrical connection pad and conductive line. To be noted, the thin-film device, SMD, conductive line and electrical connection pad are not shown in <FIG>.

In this embodiment, the electronic device <NUM> includes a plurality of thin-film devices, which form a pixel array. For example, the thin-film devices can be µLEDs or OLEDs, and are formed on the active region A1 by, for example but not limited to, the LTPS thin-film process. Thus, the electronic device <NUM> will be a µLED display device or an OLED display device. In addition, the periphery region A2 is configured with a driving circuit for driving the thin-film devices in the active region A1. The driving circuit can include a plurality of SMDs, which include ICs (e.g. CPU), other components, conductive lines or circuits. Besides, the SMDs of the periphery region A2 can also be formed by, for example but not limited to, the LTPS thin-film process.

In one embodiment, as shown in <FIG>, the periphery region A2 can be bent to the side below the flexible substrate <NUM>, so that the vertical projections of the periphery region A2 and the active region A1 on the flexible substrate <NUM> are partially overlapped. To be noted, it is possible to half-cut the dotted line of <FIG> before the bending step.

In the conventional display device, a flexible board (e.g. COF) is provided to connect a printed circuit board and a display panel, so that the driving circuit disposed on the printed circuit board can be electrically connected to the display panel through the flexible board for driving the display panel. In the assembling procedure of the conventional display device, since the flexible board between the printed circuit board and the display panel is bendable, it is commonly to bend the flexible board for placing the printed circuit board below the display panel. This bending step can make the size of the conventional display device be smaller, but will increase the thickness thereof.

In the electronic device <NUM> of the embodiment as shown in <FIG>, the thin-film device is formed on the active region A1 by the thin-film process, and the SMD is disposed on the periphery region A2 by SMT. Since the thin-film devices, SMDs, conductive lines and electrical connection pads are disposed on the same surface of the flexible substrate <NUM>, many fine layouts and components can be formed on the flexible substrate <NUM>, the manufacturing processes are easier and simpler, and the manufacturing cost is lower. In addition, since the flexible substrate <NUM> can be directly bent, the driving circuit on the periphery region A2 can be positioned under the active region A1. Compared with the conventional process, the electronic device <NUM> of this embodiment can be manufactured thinner.

To sum up, in the electronic device and the manufacturing method thereof of this disclosure, a conductive line and at least one electrical connection pad are formed on a flexible substrate, at least one thin-film device is disposed on the flexible substrate and electrically connected with the conductive line and the electrical connection pad, and an SMD is disposed on the flexible substrate and electrically connected with the thin-film device through the conductive line and the electrical connection pad. The thickness of the electrical connection pad is between <NUM> microns and <NUM> microns. Compared with the conventional electronic device, the thin-film device of the electronic device of this disclosure is formed by a thin-film process, and then the SMD is disposed by a surface-mount technology (SMT). Accordingly, it is possible to manufacture many fine layouts and components, thereby increasing the component density.

Claim 1:
A manufacturing method of an electronic device, comprising steps of:
forming (S01) a flexible substrate (<NUM>, <NUM>) on a rigid carrier plate (<NUM>), wherein the flexible substrate (<NUM>, <NUM>) includes an active region (Al);
forming (S02) a plurality of thin-film devices (<NUM>, <NUM>) directly on the flexible substrate (<NUM>, <NUM>) in the active region (A1) of the flexible substrate (<NUM>, <NUM>);
forming (S03) a thin-film conductive line (<NUM>) directly on the flexible substrate (<NUM>, <NUM>),
wherein the thin-film conductive line (<NUM>) is directly electrically connected with the thin-film devices (<NUM>, <NUM>);
forming (S04) a plurality of electrical connection pads (<NUM>) on the flexible substrate (<NUM>, <NUM>), wherein the electrical connection pads (<NUM>) are electrically connected with the thin-film conductive line (<NUM>), and a thickness of the electrical connection pads (<NUM>) is between <NUM> micrometers and <NUM> micrometers
disposing a plurality of solders (<NUM>) on the electrical connection pads (<NUM>) respectively;
disposing (S05) a plurality of surface-mount devices, SMDs, (<NUM>, <NUM>) on the solders (<NUM>) respectively by a surface-mount technology, SMT, wherein the SMDs (<NUM>, <NUM>) are electrically connected with the thin-film devices (<NUM>, <NUM>) through the solders (<NUM>), the electrical connection pads (<NUM>) and the thin-film conductive line (<NUM>), and wherein the SMDs are disposed on the active region (A1) of the flexible substrate (<NUM>, <NUM>), so that each thin-film device (<NUM>, <NUM>) of the plurality of thin-film devices (<NUM>, <NUM>) controls one or more SMDs, (<NUM>, <NUM>) of the plurality of SMDs, (<NUM>, <NUM>), wherein the SMDs do not overlap with the thin-film devices (<NUM>, <NUM>); and
removing (S06) the rigid carrier plate (<NUM>).