Patent Publication Number: US-2022216365-A1

Title: Semiconductor structure, display panel and manufacturing method of electronic element module

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of Taiwan application serial no. 110100212, filed on Jan. 5, 2021. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. 
     BACKGROUND 
     Technical Field 
     The disclosure relates to an electronic element module and a manufacturing method thereof, particularly to a semiconductor structure, a display panel, and a manufacturing method thereof. 
     Description of Related Art 
     In the manufacturing process of a display panel with microelectronic elements, it is quite common to transfer a plurality of microelectronic elements to a target substrate and connect other elements to the target substrate. For example, in the process of manufacturing a micro-light-emitting diode (micro LED) display panel, a huge amount of micro-light-emitting diodes needs to be transferred to the display substrate and electrically connected with the driving circuit layer of the display substrate. However, these microelectronic elements may have defects during their growth, resulting in one or more defective microelectronic elements. In order to increase production yield and to reduce production costs, it is urgent to develop a method capable of replacing these defective microelectronic elements efficiently. 
     SUMMARY 
     The disclosure provides a semiconductor structure, a display panel, and a manufacturing method of an electronic element module, adapted to provide high production yield and low production costs. 
     According to an embodiment of the present disclosure, a semiconductor structure is provided, and the semiconductor structure includes a substrate, a plurality of first microelectronic elements, and at least one second microelectronic element. The first microelectronic elements and at least one second microelectronic element are distributed on the substrate. The first microelectronic elements and at least one second microelectronic element have the same properties, and at least one of appearance difference, height difference, and orientation difference exists between the first microelectronic elements and at least one second microelectronic element. 
     According to another embodiment of the present disclosure, a display panel is provided, and the display panel includes a display substrate, a plurality of first microelectronic elements, and at least one second microelectronic element. The first microelectronic elements and at least one second microelectronic element are distributed on the display substrate and electrically connected to the display substrate. The first microelectronic elements and at least one second microelectronic element have the same properties, and at least one of appearance difference, height difference, and orientation difference exists between the first microelectronic element and at least one second microelectronic element. 
     Accordant to yet another embodiment of the present disclosure, a manufacturing method of an electronic element module is provided, and the manufacturing method of the electronic element module includes: disposing a plurality of first microelectronic elements on a first temporary substrate; replacing at least one defective microelectronic element of the first microelectronic elements with at least one second microelectronic element, where the first microelectronic elements and at least one second microelectronic element are distributed on the first temporary substrate, the first microelectronic elements and at least one second microelectronic element have the same properties, and at least one of appearance difference, height difference, and orientation difference exists between the first microelectronic elements and at least one second microelectronic element. 
     According to yet another embodiment of the present disclosure, a semiconductor structure is provided, and the semiconductor structure includes a substrate, a plurality of first microelectronic elements, at least one second microelectronic element, a first buffer layer, and a second buffer layer. The first microelectronic elements and at least one second microelectronic element are distributed on the substrate, and the first microelectronic elements and at least one second microelectronic element have the same properties. The first buffer layer is disposed between the first microelectronic elements and the substrate. The second buffer layer is disposed between at least one second microelectronic device and the substrate, and at least one of material difference, appearance difference, height difference, and orientation difference exists between the first buffer layer and the second buffer layer. 
     Based on the above, the manufacturing method of the electronic element module provided by the embodiments of the present disclosure is adapted to replace defective microelectronic elements on the temporary substrate, so that there are no defective microelectronic elements on the temporary substrate, thereby improving production yield and reducing production costs. The semiconductor structure provided by the embodiments of the present disclosure does not have defective microelectronic elements, thereby improving production yield of electronic modules subsequently manufactured (such as display panels) and reducing production costs. 
     The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  to  FIG. 1H  show a manufacturing method of an electronic element module according to an embodiment of the disclosure. 
         FIG. 2  and  FIG. 3A  show semiconductor structures according to embodiments of the disclosure. 
         FIG. 3B  shows a second temporary substrate disposed opposite to the first temporary substrate in another embodiment of the disclosure. 
         FIG. 4A  to  FIG. 4G  show electronic element modules according to embodiments of the disclosure. 
         FIG. 5A  is a schematic diagram of the luminous-intensity distribution of micro-light-emitting diodes of a display panel according to an embodiment of the disclosure. 
         FIG. 5B  is a schematic diagram of the light-emission wavelength distribution of micro-light-emitting diodes of a display panel according to the embodiment of the disclosure. 
         FIG. 6A  is a schematic cross-sectional view of a second temporary substrate. 
         FIG. 6B  is a schematic top view of a second temporary substrate. 
         FIG. 7  shows a display panel according to an embodiment of the disclosure. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     Please refer to  FIG. 1A  to  FIG. 1H , which show a manufacturing method of an electronic element module according to an embodiment of the disclosure. 
       FIG. 1A  shows that a first buffer layer  103  is provided on a first temporary substrate  100 , and a plurality of first microelectronic elements  101  are provided on the first buffer layer  103 , where each of the first microelectronic elements  101  includes an electrode  105 . Among them, the first temporary substrate  100  may be, for example, a plastic substrate, a ceramic substrate, a glass substrate, a sapphire substrate, or other substrates without driving circuit. The electrode  105  has at least two sub-electrodes  105   a  and  105   b  having opposite electrical polarities, and may be disposed between the first microelectronic element  101  and the first buffer layer  103  or respectively on both sides of the first microelectronic element  101 , to which the disclosure does not limit. However, due to the yield problem of the manufacturing process, a defective microelectronic element  101 F may appear on the first temporary substrate  100 . It should be noted that this embodiment shows only one defective microelectronic element  101 F, which is merely taken as an example. However, the present disclosure does not limit this. The number of the defective microelectronic element  101 F on the first temporary substrate  100  may be plural, and the defective microelectronic element  101 F may randomly occur among the first microelectronic element  101 . In addition, the first microelectronic elements  101  and the defective microelectronic element  101 F are distributed on the first temporary substrate  100  in a two-dimensional manner, despite that  FIG. 1A  only shows a cross-sectional view. 
       FIG. 1B  shows that the defective microelectronic device  101 F and the first buffer layer  103  underneath it are removed. In other words, the defective microelectronic element  101 F and a portion of the first buffer layer  103  corresponding to the defective microelectronic element  101 F are removed from the first temporary substrate  100 . According to an embodiment of the present disclosure, a laser may be adopted to irradiate the portion of the first buffer layer  103  where it is below the defective microelectronic element  101 F to decompose this portion of the first buffer layer  103 , so that the defective microelectronic element  101 F and this portion of the first buffer layer  103  may be detached from the first temporary substrate  100 . However, as long as the bonding force of the defective microelectronic element  101 F and this portion of the first buffer layer  103  may be reduced, the present disclosure does not limit this. According to another embodiment of the present disclosure, the defective microelectronic element  101 F and the portion of the first buffer layer  103  under it may be directly picked up from the first temporary substrate  100  by decomposing the first buffer layer  103 . 
       FIG. 1C  shows that a second buffer layer  104  is further provided on the first temporary substrate  100  where the portion of the first buffer layer  103  is removed. It should be noted that in  FIG. 1C , the material of the second buffer layer  104  is the same as that of the first buffer layer  103 , to which the present disclosure is not limited. The material of the second buffer layer  104  may also be different from that of the first buffer layer  103 . 
     In addition, in  FIG. 1C , the size of the second buffer layer  104  is the same as the size of the first buffer layer  103 , to which the present disclosure is not limited. The size of the second buffer layer  104 , such as its width and thickness, may also be different from the size of the first buffer layer  103 .  FIG. 1D  shows a second temporary substrate  100 A disposed opposite to the first temporary substrate  100 , and that a second microelectronic element  102  on the second temporary substrate  100 A is opposite to the second buffer layer  104 . The second microelectronic element  102  has an electrode  105 , and the second microelectronic element  102  is connected to the second temporary substrate  100 A through a connection pad  102 C. The second microelectronic element  102  and the first microelectronic elements  101  are elements with the same properties. For example, they are micro-light-emitting diodes of the same color. For example, the second microelectronic element  102  and the first microelectronic elements  101  are all red micro-light-emitting diodes, all green micro-light-emitting diodes, or all blue micro-light-emitting diodes. Some embodiments are also applied to other microelectronic elements, including microelectronic elements controlled to perform predetermined electronic functions (such as diodes, transistors, and/or integrated circuits) or microelectronic elements with photonic functions (such as laser diodes and/or photodiodes). Other embodiments of the present disclosure may also be applied to microchips including circuits, for example, Si or SOI wafers adapted for logic or memory application microchips, or GaAs wafers adapted for RF communication applications. 
       FIG. 1E  shows that the second microelectronic element  102  is detached from the second temporary substrate  100 A to be disposed on the second buffer layer  104 . According to an embodiment of the present disclosure, the connection pad  102 C of the second microelectronic element  102  may be irradiated with a laser to decompose the connection pad  102 C, so that the second microelectronic element  102  is detached from the second temporary substrate  100 A. 
     In the process shown in  FIG. 1A  to  FIG. 1E , the defective microelectronic element  101 F on the first temporary substrate  100  is replaced with the second microelectronic element  102 . Note particularly that, in  FIG. 1D , the number of the second microelectronic elements  102  may be one or more. In an embodiment of the present disclosure, the number of the second microelectronic element  102  is one, and in this situation, only one defective microelectronic element  101 F is replaced with the second microelectronic element  102 . In another embodiment of the present disclosure, the number of the second microelectronic elements  102  is plural, and under such situation, a plurality of defective microelectronic elements  101 F are replaced with the second microelectronic elements  102 . Besides, the second microelectronic element  102  may randomly occur among the first microelectronic element  101 . 
     In this embodiment,  FIG. 1A  to  FIG. 1E  show how to manufacture a semiconductor structure  10  in  FIG. 1E  using the manufacturing method of an electronic element module according to an embodiment of the present disclosure. The semiconductor structure  10  includes a first temporary substrate  100 , a plurality of first microelectronic elements  101 , and a second microelectronic element  102 . In other words, the manufacturing method of the electronic element module provided by the embodiment of the present disclosure replaces the defective microelectronic element  101 F on the first temporary substrate  100 , and as a result, there are almost no defective microelectronic elements  101 F existing on the manufactured semiconductor structure  10 , thereby improving production yield of electronic devices to be subsequently manufactured and reducing production costs. 
     As mentioned above, in some embodiments of the present disclosure, a laser is adopted to decompose the first buffer layer  103  under the defective microelectronic element  101 F, such that the defective microelectronic element  101 F is detached from the first temporary substrate  100 , and a laser is also adopted to decompose the connection pad  102 C, such that the second microelectronic element  102  is detached from the second temporary substrate  100 A. Based on the characteristic that the laser beam irradiates the position accurately, this manufacturing method improves the efficiency of replacing the defective microelectronic element  101 F with the second microelectronic element  102 . 
     In the semiconductor structure  10 , the first microelectronic elements  101  and the second microelectronic elements  102  are distributed on the first temporary substrate  100 , for example, in an array. The first microelectronic elements  101  and the second microelectronic elements  102  have the same properties. For example, they are all red light-emitting diodes. 
     In the semiconductor structure  10  shown in  FIG. 1E , since the first microelectronic elements  101  and the second microelectronic elements  102  may come from different growth wafers, the first microelectronic elements  101  and the second microelectronic elements  102  may have appearance differences, such as differences in size or apparent color. 
     In the semiconductor structure  10  shown in  FIG. 1E , there is no size difference between the first buffer layer  103  and the second buffer layer  104 , but the present disclosure is not limited thereto. The first buffer layer  103  and the second buffer layer  104  may have different appearances. For example, the size of the first buffer layer  103  and the size of the second buffer layer  104  may be different. Or, for example, in an embodiment of the present disclosure, the thickness of the second buffer layer  104  is different from the thickness of the first buffer layer  103 , so there is a height difference between the first microelectronic element  101  and the second microelectronic element  102 . By providing the second buffer layer  104  in a size that may be different from the size of the first buffer layer  103 , the replacement process in which the second microelectronic element  102  replaces the defective microelectronic element  101 F becomes more flexible and according to the defective condition of the defective microelectronic element  101 F, which increases the yield rate and reduces the repair costs. For example, the thickness of the second buffer layer  104  is greater than the thickness of the first buffer layer  103 , and in this way, when the defective microelectronic element  101 F is replaced by the second microelectronic element  102 , the non-defective first microelectronic element  101  therearound are not affected. Furthermore, since the first microelectronic elements  101  are disposed on the first temporary substrate  100  in the step shown in  FIG. 1A , whereas the second microelectronic element  102  is disposed on the first temporary substrate  100  in the step shown in  FIG. 1D , the two are disposed on the first temporary substrate  100  in different steps. Therefore, the first microelectronic elements  101  and the second microelectronic element  102  may have orientation differences, such as gap differences. According to an embodiment of the present disclosure, when the number of the second microelectronic elements  102  disposed on the first temporary substrate  100  is plural, the differences in gap between these second microelectronic elements  102  and the first microelectronic elements  101  are the same to one another. In other words, the gaps between the first microelectronic elements  101  are the same as one another, and the gaps between the second microelectronic elements  102  are the same as one another. In addition, the gap between the second microelectronic elements  102  and the gap between the first microelectronic elements  101  are different. According to some embodiments of the present disclosure, the material of the first buffer layer  103  and the material of the second buffer layer  104  may be the same or different from each other. For example, the material of the second buffer layer  104  is different from the material of the first buffer layer  103 . Preferably, the Young&#39;s modulus of the second buffer layer  104  is less than the Young&#39;s modulus of the first buffer layer  130 , and in this way, when the defective microelectronic element  101 F is replaced by the second microelectronic element  102 , the non-defective first microelectronic element  101  therearound are not affected. According to some embodiments of the present disclosure, the color of the first buffer layer  103  and the color of the second buffer layer  104  may be the same or different from each other. According to some embodiments of the present disclosure, the thickness of the first buffer layer  103  and the thickness of the second buffer layer  104  may be the same or different from each other. According to some embodiments of the present disclosure, the width of the first buffer layer  103  and the width of the second buffer layer  104  may be the same or different from each other. For example, the width of the second buffer layer  104  is greater than the width of the first buffer layer  103 , and in this way, when the defective microelectronic element  101 F is replaced by the second microelectronic element  102 , the non-defective first microelectronic element  101  therearound are not affected, and there is a larger bonding surface for the second microelectronic element  102  to achieve better yield. Next, please refer to  FIG. 1F , which shows: the semiconductor structure  10  is disposed opposite to a display substrate  106 . The display substrate  106  is, for example, a substrate with circuits or metal redistribution lines, provided with a driving circuit layer  107  which, for example, has transistors or integrated circuits (ICs) that may be electrically connected to the first microelectronic elements  101  and the second microelectronic element  102  to control the first microelectronic elements  101  and the second microelectronic element  102 , to which there is no restriction here. 
       FIG. 1G  shows that: the first microelectronic elements  101  and the second microelectronic element  102  are transferred to a display substrate  106 . 
       FIG. 1H  shows that: the driving circuit layers  107  are electrically connected to the electrodes  105  of the first microelectronic elements  101 , and the driving circuit layers  107  are also electrically connected to the electrodes  105  of the second microelectronic element  102 . 
     Specifically,  FIG. 1F  to  FIG. 1H  shows how to manufacture the electronic element module  20  by using the manufacturing method of the electronic element module of the embodiment of the present disclosure, where the first microelectronic elements  101  and the second microelectronic element  102  are transferred from the semiconductor structure  10  to the display substrate  106  and are electrically connected to the driving circuit layers  107  of the display substrate  106 . As described above, since there is no defective microelectronic element  101 F in the semiconductor structure  10 , almost no defective microelectronic element  101 F is transferred to the display substrate  106 , improving production yield of the electronic element module  20  and reducing production costs. 
     According to some embodiments of the present disclosure, the electronic element module  20  is implemented as a display panel, but the present disclosure is not limited thereto. The electronic element module  20  may be any electronic device having the first microelectronic elements  101  and the second microelectronic element  102 . 
     Take the embodiment in which the electronic element module  20  is implemented as a display panel for example. The display panel  20  includes a display substrate  106 , a plurality of first microelectronic elements  101 , and a second microelectronic element  102 . The display substrate  106  includes a driving circuit layer  107 . The first microelectronic elements  101  and the second microelectronic elements  102  are distributed on the display substrate  106  in an array and are electrically connected to the display substrate  106 . The first microelectronic elements  101  and the second microelectronic element  102  have the same properties. For example, they are both micro-light-emitting diodes of the same color, such as the same red micro-light-emitting diode, the same green micro-light-emitting diode, or the same blue micro-light-emitting diode. 
     Since the first microelectronic elements  101  and the second microelectronic element  102  may come from different growth wafers, the first microelectronic elements  101  and the second microelectronic element  102  may have differences in appearance, such as differences in apparent color and size. In addition, since there may be a size difference between the first microelectronic elements  101  and the second microelectronic element  102 , there may be a height difference between the first microelectronic elements  101  and the second microelectronic element  102  on the display substrate  106 . For example, the height of the first microelectronic elements  101  is less than the height of the second microelectronic element  102 , and in this way, when the defective microelectronic element  101 F is replaced by the second microelectronic element  102 , the non-defective first microelectronic element  101  therearound are not affected. 
     In addition, since the first microelectronic elements  101  and the second microelectronic element  102  in the display panel  20  are transferred from the first temporary substrate  100  to the display substrate  106 , when the first microelectronic elements  101  and the second microelectronic element  102  of the semiconductor structure  10  have an orientation difference, such orientation difference may also be transferred from the first temporary substrate  100  to the display substrate  106 . However, because this orientation difference is less than 10%, it does not affect the subsequent display effect. The ratio of the second microelectronic element  102  to the sum of the first microelectronic elements  101  and the second microelectronic element  102  on the first temporary substrate  100  when less than 30% does not affect the subsequent display effect. A subsequent displaying effect is not affected since there is not too many different microelectronic elements. 
     In general, the manufacturing method of an electronic element module provided by an embodiment of the present disclosure replaces defective microelectronic elements on a temporary substrate, leaving no defective microelectronic elements on the temporary substrate, thereby improving production yield of electronic modules subsequent manufactured (such as display panels) and reducing production costs. 
     In order to fully illustrate various embodiments of the present disclosure, other embodiments of the present disclosure are described below. It must be noted here that the following embodiments adopt the element numbers and part of the content of the foregoing embodiments, where the same numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted parts, please refer to the foregoing embodiments, and the following embodiments do not repeat the same descriptions. 
     Next, please refer to  FIG. 2 , which shows a semiconductor structure according to an embodiment of the present disclosure. A semiconductor structure  200  includes a first temporary substrate  100 , a plurality of first microelectronic elements  101 , and a second microelectronic element  102 . A first buffer layer  103  is provided between the first microelectronic elements  101  and the first temporary substrate  100 . A second buffer layer  204  is provided between the second microelectronic element  102  and the first temporary substrate  100 . The semiconductor structure  200  is different from the aforementioned semiconductor structure  10  in that the width of the second buffer layer  204  in a direction D 1  perpendicular to the normal line of the first temporary substrate  100  is different from that of the first buffer layer  103 . For example, the width of the second buffer layer  104  is greater than the width of the first buffer layer  103 , and in this way, when the defective microelectronic element  101 F is replaced by the second microelectronic element  102 , the non-defective first microelectronic element  101  therearound are not affected, and there is a larger bonding surface for the second microelectronic element  102  to achieve better yield. 
       FIG. 3A  shows a semiconductor structure according to an embodiment of the present disclosure. A semiconductor structure  300  includes a first temporary substrate  100 , a plurality of first microelectronic elements  101 , and a second microelectronic element  102 . A first buffer layer  103  is provided between the first microelectronic elements  101  and the first temporary substrate  100 . A second buffer layer  304  is provided between the second microelectronic element  102  and the first temporary substrate  100 . The semiconductor structure  300  is different from the aforementioned semiconductor structure  10  in that the thickness of the second buffer layer  304  in a direction D 3  parallel to the normal line of the first temporary substrate  100  is different from that of the first buffer layer  103 , and that there is a height difference between the second microelectronic element  102  and the first microelectronic elements  101 . Herein the thickness of the second buffer layer  304  is less the thickness of the first buffer layer  103  since the second buffer layer  304  bears a bonding press and provides buffering in the transfer process, or since the number of times of the transfer and repair process is more than one. In another embodiment, as shown in  FIG. 3B , the initial thickness of the second buffer layer  304  may be greater than the thickness of the first buffer layer  103  when the second buffer layer  304  is disposed, and in this way, when the defective microelectronic element  101 F is replaced by the second microelectronic element  102 , the non-defective first microelectronic element  101  therearound are not affected, and there is a larger bonding surface for the second microelectronic element  102  to achieve better yield. 
       FIG. 4A  shows an electronic element module according to an embodiment of the present disclosure. An electronic element module  400 A includes a substrate  400 , a plurality of first microelectronic elements  401 , and a second microelectronic element  402 A. The electronic element module  400 A may be implemented as a semiconductor structure or a display panel. When the electronic element module  400 A is implemented as a semiconductor structure, the substrate  400  may be the first temporary substrate  100  in the semiconductor structure  10  as shown in  FIG. 1E . When the electronic element module  400 A is implemented as a display panel, the substrate  400  may be the display substrate  106  of the display panel  20  as shown in  FIG. 1H . 
     As shown in  FIG. 4A , the apparent color of the first microelectronic elements  401  and the second microelectronic element  402 A are different. In addition, the width of the second microelectronic element  402 A in a direction D 1  is slightly larger than the width of each first microelectronic element  401  in the direction D 1 , and the width of the second microelectronic element  402 A in a direction D 2  is slightly larger than the width of each first microelectronic element  401  in the direction D 2 . Therefore, the area of the second microelectronic element  402 A is slightly larger than the area of each first microelectronic element  401 , to which the present disclosure is not limited. According to some embodiments of the present disclosure, the width of the second microelectronic element  402 A in the direction D 1  may be slightly smaller than or equal to the width of each first microelectronic element  401  in the direction D 1 , and the width of the second microelectronic element  402 A in the direction D 2  may be slightly less than or equal to the width of each first microelectronic element  401  in the direction D 2 . 
     Specifically, according to the embodiments of the present disclosure, the size difference between the first microelectronic elements  401  and the second microelectronic element  402 A meets the following conditional formula: 0&lt;D12/W1≤10%, where W1 is the width of each first microelectronic element  401  in a direction perpendicular to the normal line of the substrate  400 , D12 is the width difference between each first microelectronic element  401  and the second microelectronic element  402 A in this direction, and D12 is a positive number. A size difference more than 10% affects the display effect after the subsequent transfer is made to the display panel. 
       FIG. 4B  shows an electronic element module according to an embodiment of the present disclosure. An electronic element module  400 B includes a substrate  400 , a plurality of first microelectronic elements  401 , and a second microelectronic element  402 B. The electronic element module  400 B may be implemented as a semiconductor structure or a display panel. When the electronic element module  400 B is implemented as a semiconductor structure, the substrate  400  may be the first temporary substrate  100  of the semiconductor structure  10  as shown in  FIG. 1E . When the electronic element module  400 B is implemented as a display panel, the substrate  400  may be the display substrate  106  of the display panel  20  as shown in  FIG. 1H . 
     As shown in  FIG. 4B , there is an orientation difference between the first microelectronic elements  401  and the second microelectronic element  402 B. Specifically, each first microelectronic element  401  has an axis of symmetry AA′, and the axis of symmetry AA′ of each first microelectronic element  401  is parallel to a direction D 1 , whereas the second microelectronic element  402 B has an axis of symmetry BB′, and there is an included angle θ between the axis of symmetry BB′ of the second microelectronic element  402 B and the direction D 1 , where 0&lt;θ≤45°. An included angle more than 45° affects the display effect after the subsequent transfer is made to the display panel. 
       FIG. 4C  shows an electronic element module according to an embodiment of the present disclosure. An electronic element module  400 C includes a substrate  400 , a plurality of first microelectronic elements  401 , and a second microelectronic element  402 C. The electronic element module  400 C may be implemented as a semiconductor structure or a display panel. The electronic element module  400 C includes a substrate  400 , a plurality of first microelectronic elements  401 , and a plurality of second microelectronic elements  402 C. When the electronic element module  400 C is implemented as a semiconductor structure, the substrate  400  may be the first temporary substrate  100  in the semiconductor structure  10  as shown in  FIG. 1E . When the electronic element module  400 C is implemented as a display panel, the substrate  400  may be the display substrate  106  in the display panel  20  as shown in  FIG. 1H . 
     As shown in  FIG. 4C , each first microelectronic element  401  has an axis of symmetry AA′, and the axis of symmetry AA′ of each first microelectronic element  401  is parallel to a direction D 1 , whereas each second microelectronic element  402 C has an axis of symmetry BB′, and there is an included angle θ between the axis of symmetry BB′ of each second microelectronic element  402 C and the direction D 1 , where 0&lt;θ≤45°. The included angles between different second microelectronic elements  402 C and the direction D 1  are the same. Specifically, the orientations of the first microelectronic elements  401  are the same as one another, the orientations of the second microelectronic elements  402 C are the same as each other, the orientations of the first microelectronic elements  401  and the second microelectronic elements  402 C are different from each other, and the orientation difference between these two groups is fixed. 
       FIG. 4D  shows an electronic element module according to an embodiment of the present disclosure. An electronic element module  400 E includes a substrate  400 , a plurality of first microelectronic elements  401 , and at least one second microelectronic element  402 E. The electronic element module  400 E may be implemented as a semiconductor structure or a display panel. When the electronic element module  400 E is implemented as a semiconductor structure, the substrate  400  may be the first temporary substrate  100  of the semiconductor structure  10  as shown in  FIG. 1E . When the electronic element module  400 E is implemented as a display panel, the substrate  400  may be the display substrate  106  of the display panel  20  as shown in  FIG. 1H . As shown in  FIG. 4D , when the defective microelectronic elements  101 F are replaced by the second microelectronic elements  402 E, the second microelectronic elements  402 E can be randomly disposed on defective positions on the temporary substrate, for example. 
     In an embodiment, as shown in  FIG. 4E , an electronic element module  400 G may include a substrate  400 , a plurality of first microelectronic elements  401 , a second microelectronic element  402 G, and a third microelectronic element  403 G. The number of the second microelectronic element  402 G and the third microelectronic element  403 G may be one or more, and the second microelectronic element  402 G and the third microelectronic element  403 G may be transferred to the substrate  400  through different temporary substrates. Specifically, different temporary substrates may be used to transfer the second microelectronic element  402 G and the third microelectronic element  403 G to the substrate  400  of the electronic element module in different stage of the transfer process to repair defective microelectronic elements  101 F. Under this situation, at least one of appearance difference, height difference, and orientation difference exists among two of the three that are the first microelectronic elements  401 , the second microelectronic element  402 G, and the third microelectronic element  403 G. 
       FIG. 4F  shows an electronic element module according to an embodiment of the present disclosure. An electronic element module  400 D includes a substrate  400 , a plurality of first microelectronic elements  401 , and a plurality of second microelectronic elements  402 D. The gaps between the first microelectronic elements  401  are the same as each other. The gaps between the second microelectronic elements  402 D are the same as each other. And the gaps between the second microelectronic elements  402 D and the first microelectronic elements  401  are different. In other words, there is a gap difference between the second microelectronic elements  402 D and the first microelectronic elements  401 . Specifically speaking, the gap between the first microelectronic elements  401  is P 1 , the minimum gap between the first microelectronic elements  401  and the second microelectronic elements  402 D is P 2 , and P 1  and P 2  define the gap difference between the second microelectronic elements  402 D and the first microelectronic elements  401 . The gap differences meets the following conditional formula: 90%≤P 2 /P 1 &lt;1. In other words, the gap difference is less than 10%, and a gap difference more than 10% affects the display effect after the subsequent transfer is made to the display panel. Specifically speaking, on the repaired temporary substrate, the gap between the first microelectronic elements  401  is P 1 , the minimum gap between the first microelectronic elements  401  and the second microelectronic elements  402 D is P 2 , wherein each of P 1  and P 2  is less than the dimensions of widths and lengths of the first microelectronic element  401  or the second microelectronic element  402 D. Therefore, more microelectronic elements may be disposed on the temporary substrate, so that better space using rate may be achieved before the microelectronic elements are finally transferred to the display substrate. 
       FIG. 4G  shows an electronic element module according to an embodiment of the present disclosure. Referring to  FIG. 4G , an electronic element module  400 H includes a substrate  400 , a plurality of first microelectronic elements  401 , and at least one second microelectronic element  402 H. The electronic element module  400 H may be implemented as a semiconductor structure or a display panel. When the electronic element module  400 H is implemented as a semiconductor structure, the substrate  400  may be the first temporary substrate  100  of the semiconductor structure  10  as shown in  FIG. 1E . When the electronic element module  400 H is implemented as a display panel, the substrate  400  may be the display substrate  106  of the display panel  20  as shown in  FIG. 1H . Herein, there is at least one vacancy position VP on the substrate  400 . When the second microelectronic element  402 H is still defective during the repair process, the defective second microelectronic element  402  may be removed to form the vacancy position VP. In this case, at least one third microelectronic element (not shown) may be disposed at the vacancy position VP. Alternatively, when the number of the vacancy positions VP is not large, for example, being less than 10% of the total number of the first microelectronic elements  401  and the second microelectronic elements  402 H, the further repair is not performed to avoid reducing the manufacturing yield of the semiconductor structure since the subsequent display effect is not affected. Moreover, this can also increase the manufacturing yield of subsequently transferring the microelectronic elements onto the display substrate. 
       FIG. 5A  and  FIG. 5B  respectively are the luminous-intensity distribution diagram and the emission wavelength distribution diagram of the microelectronic elements of the display panel according to an embodiment of the present disclosure. 
     In  FIG. 5A , the horizontal axis represents the luminous intensity (arbitrary unit), the vertical axis represents the number of electronic elements, and the first strip  501  represents the first microelectronic element, and the second strip  502  represents the second microelectronic element. In  FIG. 5B , the horizontal axis represents the emission wavelength (nm), the vertical axis represents the number of microelectronic elements, and similarly, the first strip  501  represents the first microelectronic element, and the second strip  502  represents the second microelectronic element. 
     In this embodiment, the electronic element module  400 C shown in  FIG. 4C  is implemented as a display panel, the first microelectronic element  401  is implemented as a first micro-light-emitting diode, and the second microelectronic element  402 C is implemented as a second micro-light-emitting diode. It can be indicated from the description of each embodiment above that the first microelectronic element  401  and the second microelectronic element  402 C have the same properties. Therefore, it may be inferred that when the first microelectronic element  401  is implemented as the first micro-light-emitting diode and the second microelectronic element  402 C is implemented as the second micro-light-emitting diode, the first micro-light-emitting diode and the second micro-light-emitting diode here may be, for example, red micro-light-emitting diodes. However, in embodiments not shown in the drawings, they may be green micro-light-emitting diodes or blue micro-light-emitting diodes. In other words, the first micro-light-emitting diode and the second micro-light-emitting diode emit light of the same color. However, since the first micro-light-emitting diode and the second micro-light-emitting diode may come from different wafers, there may be a difference in luminous intensity and a difference in emission wavelength between the two. In other words, the luminous intensity of the first micro-light-emitting diode and the second micro-light-emitting diode may be different, and there may be wavelength difference between the light emitted by the first micro-light-emitting diode and the light emitted by the second micro-light-emitting diode. Therefore, it can be seen in  FIG. 5A  that there is a difference in luminous intensity between the first strip  501  representing the first micro-light-emitting diode and the second strip  502  representing the second micro-light-emitting diode. The difference in luminous intensity may be less than 10%, preferably. Similarly, it can be seen in  FIG. 5B  that there is a light-emission wavelength difference between the first strip  501  representing the first micro-light-emitting diode and the second strip  502  representing the second micro-light-emitting diode. The difference in emission wavelength may be less than 10%, preferably. Or, the difference between the emission wavelength of the first micro-light-emitting diode and the emission wavelength of the second micro-light-emitting diode may be greater than or equal to 1 nm and less than or equal to 5 nm. When there is no great difference between the emission wavelength of the first micro-light-emitting diode and the emission wavelength of the second micro-light-emitting diode for replacing the defective microelectronic element, the condition of uneven display of the display panel may be avoided, and the inventory cost of the micro-light-emitting diode may be reduced effectively. 
       FIG. 6A  is a schematic cross-sectional view of a second temporary substrate, and  FIG. 6B  is a schematic top view of a second temporary substrate. Referring to  FIG. 6A  and  FIG. 6B , when the microelectronic elements on the manufactured semiconductor structure  10  are further transferred onto a second temporary substrate  100 J for a subsequent transfer requirement, a plurality of third buffer layers  103 J are disposed on the second temporary substrate  100 J, and a plurality of first microelectronic elements  101  are disposed on the third buffer layers  103 J, wherein each of the first microelectronic elements  101  includes electrodes  105 . The second temporary substrate  100 J may be, for example, a plastic substrate, a ceramic substrate, a glass substrate, a sapphire substrate, a flexible substrate, an elastic substrate, or other substrates without driving circuit. Due to the issue of the yield of the process, there may be also at least one defective microelectronic element occurring on the second temporary substrate  100 J. By the aforementioned method, the at least one defective microelectronic element on the second temporary substrate  100 J may be replaced by at least one second microelectronic element  102 J, wherein at least one fourth buffer layer  104 J may be disposed on the second microelectronic element  102 , and the second microelectronic element  102  is disposed on the fourth buffer layer  104 J. In this way, there is no defective microelectronic element on the second temporary substrate  100 J of the semiconductor structure  500 J, so that the yield of the subsequently manufactured electronic device may be further increased, and the cost thereof is reduced. In other words, the embodiment of the present disclosure provides a manufacturing method of an electronic element module which replaces the defective microelectronic element on the second temporary substrate  100 J, so that the manufactured semiconductor structure  500 J has no defective microelectronic element, and the yield of the subsequently manufactured electronic device may thus be further increased, and the cost thereof is reduced. 
     Next, the semiconductor structure  500 J is disposed opposite to the display substrate  106 , and the first microelectronic elements  101  and the second microelectronic element  102 J are transferred to the display substrate  106 . 
     In the semiconductor structure  500 J, the first microelectronic elements  101  and the at least one second microelectronic element  102 J may include different properties. In this embodiment, the first microelectronic elements  101  and the at least one second microelectronic element  102 J including different properties have different light-emission colors. For example, the first microelectronic elements  101  include red micro-light-emitting diodes  1011 , green micro-light-emitting diodes  1012 , and blue micro-light-emitting diodes  1013 , and the second microelectronic element  102 J may be a red micro-light-emitting diode, a green micro-light-emitting diode, or a blue micro-light-emitting diode. In  FIG. 6A , the second microelectronic element  102 J is a green micro-light-emitting diode disposed between the red micro-light-emitting diodes  1011  and the blue micro-light-emitting diodes  1013  to form a pixel for displaying. 
     In an embodiment, the second temporary substrate  100 J may be a soft substrate, and the the first microelectronic elements  101  and the at least one second microelectronic element  102 J are transferred to the display substrate  106  by a roll-to-roll manner. The pixel pitch and the pitch of the first microelectronic elements  101  and the at least one second microelectronic element  102 J are well-determined on the second temporary substrate  100 J to facilitate transferring the first microelectronic elements  101  and the at least one second microelectronic element  102 J onto the display substrate  106 . If a width difference between the first microelectronic element  101  and the second microelectronic element  102 J, the pitch of the first microelectronic elements  101  and the at least one second microelectronic element  102 J is greater than or equal to 3 times the width difference. 
     In  FIG. 6A , the electrodes  105  are located on the top of the first microelectronic elements  101  and the second microelectronic element  102 J. However, in other embodiments, the electrodes  105  are located on the bottom of the first microelectronic elements  101  and the second microelectronic element  102 J and adjacent to the third buffer layer  103 J and the fourth buffer layer  104 J. 
       FIG. 7  shows a display panel according to an embodiment of the present disclosure. A display panel  600  includes a display substrate  106 , red micro-light-emitting diodes  101 R and  102 R, green micro-light-emitting diodes  101 G, and blue micro-light-emitting diodes  101 B. And the display substrate  106  includes a driving circuit layer  107 . The appearance (size and apparent color) of the red micro-light-emitting diode  102 R is different from the appearance of the red micro-light-emitting diode  101 R; there is an appearance difference between the two. According to an embodiment of the disclosure, there is wavelength difference between the light emitted by the red micro-light-emitting diode  101 R and the light emitted by the red micro-light-emitting diode  102 R. 
     In sum, the manufacturing method of an electronic element module provided by embodiments of the present disclosure replaces defective microelectronic elements on a temporary substrate, so that there are no defective microelectronic elements on the temporary substrate, thereby improving production yield of electronic modules subsequently manufactured (such as display panels) and reducing production costs. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the invention covers modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.