Patent Publication Number: US-2023142207-A1

Title: Apparatus for transferring electronic component from flexible carrier substrate to flexible target substrate and method of transferring electronic component

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of U.S. provisional application Ser. No. 63/275,953, filed on Nov. 5, 2021 and Taiwan application serial no. 111100995, filed on Jan. 10, 2022. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification. 
    
    
     BACKGROUND 
     Technical Field 
     The invention relates to an apparatus for transferring an electronic component from a flexible carrier substrate to a flexible target substrate and a method of transferring an electronic component. 
     Description of Related Art 
     In manufacturing electronic products, steps for transferring related electronic components are often required. For example, in manufacturing light-emitting diode (LED) displays, the light-emitting diodes are often transferred from a flexible substrate to another flexible substrate by a pick-and-place apparatus. However, a throughput or yield of the approach may be low. 
     SUMMARY 
     The invention is directed to an apparatus for transferring an electronic component from a flexible carrier substrate to a flexible target substrate and a method of transferring an electronic component, which are adapted to transfer the electronic component. 
     The invention provides an apparatus for transferring an electronic component from a flexible carrier substrate to a flexible target substrate. The apparatus includes a first frame, a second frame, an abutment element and a deformation generating mechanism. The first frame is configured to carry the flexible carrier substrate. The second frame is configured to carry the flexible target substrate. The abutment element is arranged adjacent to the first frame, controlled by a braking mechanism, and adapted to move repeatedly toward and away from the second frame. The deformation generating mechanism is adjacent to the second frame and arranged opposite to the abutment element. When the abutment element moves toward the second frame, the deformation generating mechanism forms a relative force toward the abutment element at a position where the surface of the flexible target substrate carried by the second frame is relative to the abutment element. 
     The invention provides a method of transferring an electronic component including following steps: providing a flexible carrier substrate, where the electronic component is carried on the flexible carrier substrate; providing a flexible target substrate; configuring the flexible carrier substrate and the flexible target substrate opposite to each other so that a surface of the flexible carrier substrate carrying the electronic component faces the flexible target substrate; applying an action force on a surface of the flexible carrier substrate that does not carry the electronic component so that the electronic component moves toward the flexible target substrate; applying a relative force on the flexible target substrate so that the flexible target substrate generates a deformation, defining a receiving point on the flexible target substrate by the deformation, and keeping a peripheral region of the receiving point on the flexible target substrate away from the electronic component; contacting and transferring the electronic component to the receiving point; and ceasing applying the action force and the relative force so that the flexible carrier substrate and the flexible target substrate return to their original shapes. 
     To make the aforementioned more comprehensible, several embodiments accompanied with drawings are described in detail as follows. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
         FIG.  1 A  is a schematic partial side view of an apparatus for transferring an electronic component from a flexible carrier substrate to a flexible target substrate according to a first embodiment of the invention. 
         FIG.  1 B  to  FIG.  1 D  are schematic partial side views of partial operation method of the apparatus for transferring the electronic component from the flexible carrier substrate to the flexible target substrate according to the first embodiment of the invention. 
         FIG.  1 E  is a schematic partial bottom view of the partial operation method of the apparatus for transferring the electronic component from the flexible carrier substrate to the flexible target substrate according to an embodiment of the invention. 
         FIG.  2 A  is a schematic partial side view of an apparatus for transferring an electronic component from a flexible carrier substrate to a flexible target substrate according to a second embodiment of the invention. 
         FIG.  2 B  to  FIG.  2 D  are schematic partial side views of partial operation method of the apparatus for transferring the electronic component from the flexible carrier substrate to the flexible target substrate according to the second embodiment of the invention. 
         FIG.  3 A  is a schematic partial side view of an apparatus for transferring an electronic component from a flexible carrier substrate to a flexible target substrate according to a third embodiment of the invention. 
         FIG.  3 B  to  FIG.  3 D  are schematic partial side views of partial operation method of the apparatus for transferring the electronic component from the flexible carrier substrate to the flexible target substrate according to the third embodiment of the invention. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     The content of the following examples is for illustration rather than limitation. Moreover, descriptions of well-known devices, methods and materials may be omitted so as not to obscure descriptions of various principles of the invention. Directional terms (for example, up, down, top, bottom) as used herein refer only to the drawings or corresponding idioms, and are not intended to imply absolute orientations. In addition, unless the content clearly dictates otherwise, the singular forms “a,” “an,” “the,” or forms that do not specifically refer to a quantity may include one or plural forms, i.e., include “at least one.” 
     In some of the drawings, some components or layers may be enlarged, reduced or omitted for clarity&#39;s sake. For example, in  FIG.  1 A ,  FIG.  2 A  or  FIG.  3 A , electronic components  810  may be enlarged and/or a thickness of a flexible carrier substrate  130  or a thickness of a flexible target substrate  140  may be enlarged. 
     Similar components are denoted by the same reference numerals, and have similar functions, materials or forms, and descriptions thereof are omitted. It will be apparent to those of ordinary skill in the art to which the invention pertains, from the content of the embodiments and the corresponding illustrations, that the invention may be practiced in other embodiments that depart from the specific details disclosed herein. 
     Referring to  FIG.  1 A , an electronic component transfer apparatus (which may simply be referred to as an apparatus)  100  may be adapted to transfer the electronic components  810  from a flexible carrier substrate  130  to a flexible target substrate  140  (which will be described in detail later). The electronic component transfer apparatus  100  includes a first frame  171 , a second frame  181 , an abutment element  111  and a deformation generating mechanism  120 . The first frame  171  is configured to carry the flexible carrier substrate  130 . The second frame  181  is configured to carry the flexible target substrate  140 . The first frame  171  or the second frame  181  may allow the flexible target substrate  140  and the flexible carrier substrate  130  to be disposed opposite to each other. The abutment element  111  is arranged adjacent to the first frame  171 . The abutment element  111  is controlled by a braking mechanism  112 , and may reciprocate in a direction toward the second frame  181  (which is referred to as a second direction D 2 ) and a direction away from the second frame  181  (which is referred to as a first direction DD. The deformation generating mechanism  120  is adjacent to the second frame  181 . The deformation generating mechanism  120  is arranged opposite to the abutment element  111 . When the abutment element  111  moves toward the second frame  181 , the deformation generating mechanism  120  forms a relative force toward the abutment element  111  on a surface of the flexible target substrate  140  carried by the second frame  181  at a position relative to the abutment element  111 . Detailed structures of the abutment element  111  and/or the deformation generating mechanism  120  and/or the corresponding operation method there between are described in detail below. 
     In the embodiment, the electronic component transfer apparatus  100  may further include a control system  190 . The control system  190  may be connected to corresponding components, elements or units (for example, the first frame  171 , the second frame  181 , the braking mechanism  112 , the braking mechanism  122  and/or other devices described later, but the invention is not limited thereto) in signal connection by means of wired signal transmission, but the invention is not limited thereto. In an embodiment, the control system  190  may be connected to the corresponding components, elements or units in signal connection by means of wireless signal transmission. Namely, the electronic component transfer apparatus  100  including the control system  190  and the first frame  171 , the second frame  181 , the braking mechanism  112 , the braking mechanism  122  and/or other devices described later that are connected to the control system  190  in signal connection is the same equipment or machine. In addition, the signal connection mentioned in the invention may generally refer to the connection method of wired signal transmission or wireless signal transmission. Moreover, the invention does not limit all signal connection methods to be the same or different. 
     In an embodiment, the first frame  171  may indirectly fix the flexible carrier substrate  130  through a carrier frame  172 , but the invention is not limited thereto. 
     In the embodiment, the flexible carrier substrate  130  may include an ultraviolet tape (UV tape) or a blue tape (blue tape), but the invention is not limited thereto. In an embodiment, the carrier frame  172  may be referred to as a blue film frame, but the invention is not limited thereto. 
     In an embodiment, the flexible carrier substrate  130  may be made of a composite material. For example, the flexible carrier substrate  130  may have a polymer film covered with an adhesive layer. 
     In the embodiment, the flexible carrier substrate  130  may have a first carrier surface  130   a  and a second carrier surface  130   b  opposite to the first carrier surface  130   a . The electronic components  810  may be located on the first carrier surface  130   a  of the flexible carrier substrate  130 . The first carrier surface  130   a  of the flexible carrier substrate  130  may be disposed opposite to a first target surface  140   a  of the flexible target substrate  140 . 
     In the embodiment, the electronic components  810  may include light-emitting dies (for example, light-emitting diode (LED) chips; but the invention is not limited thereto) or an integrated circuit (IC), but the invention is not limited thereto. In addition, for the sake of clarity, not all of the electronic components  810  are shown or marked one by one in  FIG.  1 A  or other subsequent drawings. 
     In an embodiment, the second frame  181  may indirectly fix the flexible target substrate  140  through a carrier frame  182 , but the invention is not limited thereto. 
     In an embodiment, a material of the flexible target substrate  140  may be the same or similar to that of the flexible carrier substrate  130 , and details thereof are not repeated herein. 
     A method that the electronic component transfer apparatus  100  transfers the electronic components  810  from the flexible carrier substrate  130  to the flexible target substrate  140  may be as described below. However, it should be noted that the invention is not limited to the methods described below. In addition, for the sake of clarity, in some of the subsequent drawings (for example,  FIG.  1 B  to  FIG.  1 C ), only side cross-sectional views of some components corresponding to a region R 1  in  FIG.  1 A  are schematically shown. In addition, for the sake of clarity, some elements or components may be omitted in some of the subsequent drawings. 
     Referring to  FIG.  1 A , the electronic component transfer apparatus  100 , the flexible carrier substrate  130  carrying the electronic components  810 , and the flexible target substrate  140  are provided. The flexible carrier substrate  130  and the flexible target substrate  140  are arranged opposite to each other, and a surface of the flexible carrier substrate  130  carrying the electronic components  810  faces the flexible target substrate  140 . Then, the following steps are performed in an unlimited order: applying an action force to a surface of the flexible carrier substrate  130  that does not carry the electronic components  810  to move the electronic components  810  toward the flexible target substrate  140 ; and applying a relative force to the flexible target substrate  140 , such that the flexible target substrate  140  has a deformation, and a receiving point is defined on the flexible target substrate  140  by the deformation, and the flexible target substrate  140  is kept away from the electronic components  810  in a peripheral region of the receiving point. In this way, the electronic components  810  may be contacted and transferred to the receiving point. Then, applying of the action force and the relative force is stopped in an unlimited order to restore the flexible carrier substrate  130  and the flexible target substrate  140  to their original state. 
     It should be noted that, in  FIG.  1 A , the number and/or the configuration of the electronic components  810  disposed on the flexible carrier substrate  130  are only illustrative and are not limited by the invention. 
     It should be noted that in  FIG.  1 A , the manner of configuring the flexible carrier substrate  130  on the first frame  171  and/or the manner of configuring the flexible target substrate  140  on the second frame  181  are only exemplary, and are not limited by the invention. 
     Referring to  FIG.  1 A  and  FIG.  1 B , the abutment element  111  of the electronic component transfer apparatus  100  is brought close to the flexible carrier substrate  130 , so that a carrier abutment surface  111   b  (indicated in  FIG.  1 D  or  FIG.  1 E ) of the abutment element  111  abuts against a surface of the flexible carrier substrate  130  (for example, the second carrier surface  130   b ) that does not carry the electronic components  810 . For example, the abutment element  111  may be moved along a second direction D 2  by the braking mechanism  112 , so that the abutment element  111  at least contacts the second carrier surface  130   b  of the flexible carrier substrate  130 . 
     In the embodiment, the abutment element  111  may comprise a pin bolt. 
     In the embodiment, the carrier abutment surface  111   b  of the abutment element  111  may be flat or nearly flat. In this way, when the carrier abutment surface  111   b  of the abutment element  111  abuts against the flexible carrier substrate  130 , a possibility of damaging the flexible carrier substrate  130  may be reduced. Namely, the abutment element  111  (for example, the pin bolt) substantially does not penetrate the flexible carrier substrate  130 . 
     Referring to  FIG.  1 A  to  FIG.  1 B  continuously, at least a part of the deformation generating mechanism  120  of the electronic component transfer apparatus  100  is brought close to the flexible target substrate  140 . The deformation generating mechanism  120  may include a pin bolt  121  and a corresponding braking mechanism  122 . The pin bolt  121  may be moved along a first direction D 1  by the braking mechanism  122  to at least make a target abutment surface  121   b  (indicated in  FIG.  1 D  or  FIG.  1 E ) of the pin bolt  121  abutting against a second target surface  140   b  of the flexible target substrate  140 . 
     In the embodiment, the target abutment surface  121   b  of the pin bolt  121  may be flat or nearly flat. In this way, when the target abutment surface  121   b  of the pin bolt  121  is made to abut against the flexible target substrate  140 , the possibility of damaging the flexible target substrate  140  may be reduced. Namely, the pin bolt  121  of the deformation generating mechanism  120  substantially does not penetrate the flexible target substrate  140 . 
     It should be noted that the invention does not limit the order in which the pin bolt  121  of the deformation generating mechanism  120  contacts the flexible target substrate  140  and the abutment element  111  contacts the flexible carrier substrate  130 . For example, the pin bolt  121  and the abutment element  111  may contact the flexible target substrate  140  and the flexible carrier substrate  130  at the same time or respectively at different time. 
     Referring to  FIG.  1 B  to  FIG.  1 C or  1 D , an action force is applied on a surface of the flexible carrier substrate  130  that does not carry the electronic components  810 , so that a corresponding electronic component  811  on the flexible carrier substrate  130  (for example, one of the electronic components  810 ; indicated in  FIG.  1 D ) move toward the flexible target substrate  140 . 
     For example, the abutment element  111  may be moved by the braking mechanism  112 , so that the abutment element  111  in contact with the flexible carrier substrate  130  exerts a corresponding action force to the flexible carrier substrate  130 , so that the flexible carrier substrate  130  generates a corresponding deflection in the direction of the flexible target substrate  140 , and the corresponding electronic component  811  on the flexible carrier substrate  130  may move toward the flexible target substrate  140 . Namely, the action force applied to the flexible carrier substrate  130  may be generated by making the abutment element  111  to abut against the flexible carrier substrate  130 . 
     Referring to  FIG.  1 B  to  FIG.  1 C  or  FIG.  1 D  continuously, a relative force is applied on the flexible target substrate  140  to deform the flexible target substrate  140 . In addition, a receiving point may be defined on the deformed flexible target substrate  140  (for example, a place of the flexible target substrate  140  corresponding to the target abutment surface  121   b  of the pin bolt  121  of the deformation generating mechanism  120 ), where a peripheral region of the receiving point on the flexible target substrate  140  is away from the electronic component  811 . Namely, in the deformed flexible target substrate  140 , compared to the other regions different from the receiving point (i.e. the peripheral region), the receiving point is closer to the electronic component  811  to be transferred. 
     For example, the pin bolt  121  may be moved by the braking mechanism  122 , and the pin bolt  121  in contact with the flexible target substrate  140  exerts the corresponding relative force on the flexible target substrate  140 , so that the flexible target substrate  140  is moved toward the flexible carrier substrate  130  to produces a corresponding deflection. Namely, the relative force applied to the flexible target substrate  140  may be generated by making the pin bolt  121  of the deformation generating mechanism  120  abutting against the flexible target substrate  140 . 
     It should be noted that the invention does not limit the order that the action force is applied to the flexible carrier substrate  130  to produce deformation and the relative force is applied to the flexible target substrate  140  to produce deformation. 
     Referring to  FIG.  1 C or  1 D , after the action force is applied to the flexible carrier substrate  130  to produce a deformation and the relative force is applied the flexible target substrate  140  to produce a deformation, the electronic component  811  on the flexible carrier substrate  130  may contact the receiving point of the flexible target substrate  140  to be further transferred onto the receiving point of the flexible target substrate  140 . 
     In the embodiment, the electronic component transfer apparatus  100  may further include a casing  150 . The casing  150  may have a gas chamber  151 , a gas channel  152  and at least one gas opening  153 . The gas channel  152  and the gas opening  153  communicate with the gas chamber  151 . A location of the gas opening  153  corresponds to the flexible carrier substrate  130 . When the abutment element  111  exerts a corresponding action force on the flexible carrier substrate  130 , a negative pressure generating device  175  may exhaust air through a gas pipeline  174  connected to the gas channel  152 , thereby reducing a scope of deformation generated by the flexible carrier substrate  130 . 
     Taking  FIG.  1 C  and  FIG.  1 D  as an example, the casing  150  may further have an abutment opening  154  communicating with the air chamber  151 . The abutment element  111  arranged in the casing  150  may abut against the flexible carrier substrate  130  through the abutment opening  154 . When the abutment element  111  exerts the corresponding action force on the flexible carrier substrate  130 , the negative pressure generating device  175  may exhaust air. In this way, a part of region of the flexible carrier substrate  130  corresponding to the abutment opening  154  may generate corresponding deformation due to the abutting of the abutment element  111 , so that the corresponding electronic component  811  may move toward the flexible target substrate  140 . In addition, an air pressure difference generated by the aforementioned air exhaustion (for example, an air pressure outside the casing  150  is greater than an air pressure in the air chamber  151  of the casing  150 ) may make the other regions of the flexible carrier substrate  130  corresponding to the gas openings  153  to be substantially not deformed. Therefore, transfer precision of the electronic component  811  may be improved. 
     In an embodiment, when the electronic component  811  on the flexible carrier substrate  130  contact the receiving point of the flexible target substrate  140 , the air pressure in the air chamber  151  of the casing  150  is started to decrease. 
     In an embodiment, before the electronic component  811  on the flexible carrier substrate  130  contacts the receiving point of the flexible target substrate  140 , the air pressure in the air chamber  151  of the casing  150  is started to decrease. 
     In an embodiment, before starting to decrease the air pressure in the air chamber  151  of the casing  150 , the second carrier surface  130   b  of the flexible carrier substrate  130  may touch an outer surface of the casing  150 , but the invention is not limited thereto. In an embodiment that is not shown, before starting to decrease the air pressure in the air chamber  151  of the casing  150 , a gap may exist between the second carrier surface  130   b  of the flexible carrier substrate  130  and the outer surface of the casing  150 . 
     Referring to  FIG.  1 E , when the electronic component  811  on the flexible carrier substrate  130  contacts the receiving point of the flexible target substrate  140 , a contact area between the electronic component  811  and the flexible target substrate  140  may be made larger than a contact area between the electronic component  810  and the flexible carrier substrate based on the aforementioned method. In this way, transfer efficiency and/or a transfer yield of the electronic component  811  may be improved. 
     Referring to  FIG.  1 E , in an embodiment, when the electronic component  811  on the flexible carrier substrate  130  contact the receiving point of the flexible target substrate  140 , a contact area between the pin bolt  121  of the deformation generating mechanism  120  and the flexible target substrate  140  may be larger than a contact area between the electronic component  811  and the flexible carrier substrate  130 . In this way, shifting of the electronic component  811  on the flexible target substrate  140  during transfer may be reduced, and the transfer efficiency and/or the transfer yield of the electronic component  811  may be improved. 
     Referring to  FIG.  1 D  and  FIG.  1 E , in an embodiment, when the electronic component  811  on the flexible carrier substrate  130  contacts the receiving point of the flexible target substrate  140 , a contact area between the electronic component  810  and the flexible carrier substrate  130  may be substantially equal to a contact area between the abutment element  111  and the flexible carrier substrate  130 . Moreover, through the above method, both of the flexible carrier substrate  130  and the flexible target substrate  140  may have corresponding deformations, so as to reduce a possibility that other electronic components  812  on the flexible carrier substrate  130  (for example, the electronic components  810  that have not been transferred) contact other electronic components  813  on the flexible target substrate  140  (for example, the electronic components  810  that have been transferred). 
     In an embodiment, after the electronic component  810  on the flexible carrier substrate  130  contacts the receiving point of the flexible target substrate  140 , applying of the aforementioned action force (for example, to make the abutment element  111  to move in a direction away from the flexible carrier substrate  130 ) may be stopped, and/or applying of the aforementioned relative force (for example, to make the pin bolt  121  of the deformation generating mechanism  120  to move in a direction away from the flexible target substrate  140 ) may be stopped. Moreover, when or after the abutment element  111  moves in the direction away from the flexible carrier substrate  130  and/or when or after the pin bolt  121  moves in the direction away from the flexible target substrate  140 , the flexible carrier substrate  130  and/or the flexible target substrate  140  may return to its original shape by its own elasticity/deflection, so that the flexible carrier substrate  130  may be completely separated from the electronic component  811 . 
     Referring to  FIG.  2 A  and  FIG.  1 A , an electronic component transfer apparatus  200  of the embodiment is similar to the electronic component transfer apparatus  100  of the first embodiment. Namely, the electronic component transfer apparatus  200  may include the first frame  171 , the second frame  181 , the abutment element  111 , and a deformation generating mechanism  220 . 
     The electronic component transfer apparatus  200  may be adapted to transfer the electronic components  810  from the flexible carrier substrate  130  to the flexible target substrate  140  in a manner similar to that described above, which may be described below. However, it should be noted that the invention is not limited to the method described later. In addition, for the sake of clarity, in the following partial drawings (for example,  FIG.  2 B  to  FIG.  2 C ), only the side cross-sectional views of some components corresponding to the region R 3  in  FIG.  2 A  are schematically shown. In addition, for the sake of clarity, some elements or components may be omitted in the subsequent partial drawings. 
     Referring to  FIG.  2 A  and  FIG.  2 B , in the embodiment, the electronic component transfer apparatus  200  may further include a casing  260 . The casing  260  may have a gas chamber  261 , a gas channel  262  and at least one gas opening  263 . The gas channel  262  and the gas opening  263  communicate with the gas chamber  261 . A location of the gas opening  263  corresponds to the flexible target substrate  140 . 
     Referring to  2 B and  FIG.  2 C  or  FIG.  2 D , when the pin bolt  121  exerts a corresponding relative force on the flexible target substrate  140 , a negative pressure generating device  285  may exhaust air through a gas pipeline  284  connected to the gas channel  262 , so as to reduce a scope of deformation generated by the flexible target substrate  140 . Namely, at least the pin bolt  121 , the braking mechanism  122 , the casing  260  and the negative pressure generating device  285  that are suitable for making the flexible target substrate  140  to generate corresponding deformation may be regarded as the deformation generating mechanism  220 . In other words, the deformation generating mechanism  220  may include the pin bolt  121 , the braking mechanism  122 , the casing  260  and the negative pressure generating device  285 . 
     Taking  FIG.  2 C  and  FIG.  2 D  as an example, the casing  260  may further have an abutment opening  264  communicating with the air chamber  261 . The pin bolt  121  arranged in the casing  260  may abut against the flexible target substrate  140  through the abutment opening  264 . When the pin bolt  121  of the deformation generating mechanism  220  exerts the corresponding relative force on the flexible target substrate  140 , the negative pressure generating device  285  may exhaust air through the gas pipeline  284  communicated with the gas channel  262 . In this way, a part of region of the flexible target substrate  140  corresponding to the abutment opening  264  may generate corresponding deformation due to the abutting of the pin bolt  121 , so that the corresponding region abutted by the pin bolt  121  may move toward a direction of the flexible carrier substrate  130 . In addition, an air pressure difference generated by the aforementioned air exhaustion (for example, an air pressure outside the casing  260  is greater than an air pressure in the air chamber  261  of the casing  260 ) may make the other regions of the flexible target substrate  140  corresponding to the gas openings  263  to be substantially not deformed. Therefore, transfer precision of the electronic component  811  may be improved. 
     In an embodiment, when the electronic component  811  on the flexible carrier substrate  130  contact the receiving point of the flexible target substrate  140 , the air pressure in the air chamber  261  of the casing  260  is started to decrease. 
     In an embodiment, before the electronic component  811  on the flexible carrier substrate  130  contacts the receiving point of the flexible target substrate  140 , the air pressure in the air chamber  261  of the casing  260  is started to decrease. 
     In an embodiment, before starting to decrease the air pressure in the air chamber  261  of the casing  260 , the second target surface  140   b  of the flexible target substrate  140  may touch an outer surface of the casing  260 , but the invention is not limited thereto. In an embodiment that is not shown, before starting to decrease the air pressure in the air chamber  261  of the casing  260 , a gap may exist between the second target surface  140   b  of the flexible target substrate  140  and the outer surface of the casing  260 . 
     Similar to the aforementioned manner, in an embodiment, after the electronic component  811  on the flexible carrier substrate  130  contacts the receiving point of the flexible target substrate  140 , applying of the aforementioned action force may be stopped and/or applying of the aforementioned relative force may be stopped. Moreover, when or after the abutment element  111  moves in the direction away from the flexible carrier substrate  130  and/or when or after the pin bolt  121  of the deformation generating mechanism  220  moves in the direction away from the flexible target substrate  140 , the flexible carrier substrate  130  and/or the flexible target substrate  140  may return to its original shape by its own elasticity/deflection, so that the flexible carrier substrate  130  may be completely separated from the electronic components  810 . 
     Referring to  FIG.  3 A  and  FIG.  2 A , an electronic component transfer apparatus  300  of the embodiment is similar to the electronic component transfer apparatus  200  of the second embodiment. Namely, the electronic component transfer apparatus  300  may include the first frame  171 , the second frame  181 , the abutment element  111 , and a deformation generating mechanism  320 . 
     The electronic component transfer apparatus  300  may be adapted to transfer the electronic components  810  from the flexible carrier substrate  130  to the flexible target substrate  140  in a manner similar to that described above, which may be described below. However, it should be noted that the invention is not limited to the method described later. In addition, for the sake of clarity, in the following partial drawings (for example,  FIG.  3 B  to  FIG.  3 C ), only the side cross-sectional views of some components corresponding to the region R 5  in  FIG.  3 A  are schematically shown. In addition, for the sake of clarity, some elements or components may be omitted in the subsequent partial drawings. 
     Referring to  FIG.  3 A  and  FIG.  3 B , in the embodiment, the electronic component transfer apparatus  300  may further include a casing  360 . The casing  360  may have a gas chamber  261 , a gas channel  262 , at least one gas opening  263  and a protrusion  365 . The protrusion  365  may correspond to the flexible target substrate  140 , and the protrusions  365  may be located at an edge of the casing  360 . 
     Referring to  3 B and  FIG.  3 C  or  FIG.  3 D , a relative force is applied to the flexible target substrate  140  to deform the flexible target substrate  140 . Moreover, a receiving point may be defined on the deformed flexible target substrate  140 , where the flexible target substrate  140  is far away from the electronic component  811  in a peripheral region of the receiving point. Namely, in the deformed flexible target substrate  140 , the receiving point is closer to the electronic component  811  to be transferred than other regions (i.e., the peripheral region) different from the receiving point. 
     For example, the negative pressure generating device  285  may exhaust air. As a result, as shown in  FIG.  3 B  to  FIG.  3 C , a partial region of the flexible target substrate  140  corresponding to the gas openings  263  may be relatively concave in the second direction D 2  due to the air pressure difference. In addition, a partial region of the flexible carrier substrate  130  corresponding to the abutment opening  154  may be relatively convex in the first direction D 1  due to the abutting of the abutment element  111 . Namely, the relative force applied to the flexible target substrate  140  may be formed by exhausting air to the flexible target substrate  140  and abutting of the pin bolt  121 . Namely, at least the pin bolt  121 , the braking mechanism  122 , the casing  360  and the negative pressure generating device  285  that are suitable for making the flexible target substrate  140  to generate corresponding deformation may be regarded as the deformation generating mechanism  320 . In other words, the deformation generating mechanism  320  may include the pin bolt  121 , the braking mechanism  122 , the casing  360  and the negative pressure generating device  285 . According to the aforementioned manner, the transfer accuracy of the electronic component  810  may be improved. 
     In an embodiment, before the electronic component  810  on the flexible carrier substrate  130  contacts the receiving point of the flexible target substrate  140 , the air pressure in the air chamber  261  of the casing  360  is started to decrease. 
     In an embodiment, before starting to reduce the air pressure in the air chamber  261  of the casing  360 , the second target surface  140   b  of the flexible target substrate  140  may touch an outer surface of the casing  360  (for example, at the protrusion  365  of the casing  360 ) or the target abutment surface  121   b  of the pin bolt  121 , but the invention is not limited thereto. In an embodiment that is not shown, before the air pressure in the air chamber  261  of the casing  360  is started to decrease, there may be a gap between the second carrier surface  130   b  of the flexible carrier substrate  130  and the outer surface of the casing  360  (for example, at the protrusion  365  of the casing  360 ) and/or the target abutment surface  121   b  of the pin bolt  121 . 
     Through suitable inversion, rotation, arrangement and/or combination, the components or elements in all of the figures may become components presented in another figure that is not shown. For example, in a figure or embodiment that is not shown, its aspect may be a rotation or up-down flip of  FIG.  1 A ,  FIG.  2 A  or  FIG.  3 A . For another example, in a figure or embodiment that is not shown, the casing corresponding to the abutment element  111  may be the same or similar to the casing corresponding to the pin bolt  121 . 
     The method for transferring electronic component of the above embodiments may be applied to any suitable manufacturing process of electronic devices. For example, an electronic component  720  may comprise a light emitting diode chip, and the transfer method described above may be a part of a manufacturing process of a light emitting diode panel. 
     In summary, the electronic component transfer apparatus and the method for transferring electronic component of the invention may be adapted to transfer the electronic components on the flexible carrier substrate to the flexible target substrate.