Patent Publication Number: US-2019189477-A1

Title: Optoelectronic semiconductor stamp and manufacturing method thereof, and optoelectronic semiconductor

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The non-provisional patent application claims priority to U.S. provisional patent application with Ser. No. 62/607,520 filed on Dec. 19, 2017. This and all other extrinsic materials discussed herein are incorporated by reference in their entirety. 
    
    
     BACKGROUND 
     Technology Field 
     The present disclosure relates to a semiconductor stamp and, in particular, to an optoelectronic semiconductor stamp and manufacturing method thereof, and an optoelectronic semiconductor device made by the optoelectronic semiconductor stamp. 
     Description of Related Art 
     Compared with the conventional LCD device, the LED array device made of LEDs (e.g. LED display device), the Mini LED array device made of Mini LEDs (e.g. Mini LED display device), or the Micro LED array device made of Micro LEDs (e.g. Micro LED display device) does not need additional backlight source, so they can be manufactured with a lighter weight and a thinner shape. 
     In the conventional manufacturing process of optoelectronic device containing LED (e.g. display device), the LEDs are usually manufactured in advance by epitaxy process, and then the half-cut process (electrical isolation), point measurement process, and full-cut process are performed to obtain individual LEDs. Next, the individual LEDs are transferred to a supporting substrate. Afterwards, the pick-up head is provided to pick up one or more LEDs from the supporting substrate and then transfer the picked LEDs to, for example, a matrix circuit substrate for the following processes. 
     However, the conventional manufacturing method of transferring the LED dies one by one needs relatively higher apparatus accuracy and cost, and the manufacturing processes are complex and difficult. Thus, it is hard to carry out the goal of batch transferring, and the manufacturing time and cost of optoelectronic device are relatively higher. 
     SUMMARY 
     An objective of this disclosure is to provide a novel optoelectronic semiconductor stamp and manufacturing method thereof and an optoelectronic semiconductor device made by the optoelectronic semiconductor stamp. Compared with the conventional manufacturing method, the optoelectronic semiconductor device of this disclosure has the advantages of simple processes and short manufacturing time. Besides, this disclosure can achieve the goal of batch transferring, so that the optoelectronic semiconductor device can have shorter manufacturing time and lower cost. 
     This disclosure provides a manufacturing method of an optoelectronic semiconductor stamp, comprising steps of: providing an optoelectronic semiconductor substrate, wherein the optoelectronic semiconductor substrate comprises a plurality of optoelectronic semiconductor components separately disposed on an epitaxial substrate, and each of the optoelectronic semiconductor components comprises at least an electrode; pressing the optoelectronic semiconductor substrate to an UV tape, wherein the electrodes of the optoelectronic semiconductor components are adhered to the UV tape; removing the epitaxial substrate, wherein at least a part of the optoelectronic semiconductor components are adhered to the UV tape; decreasing adhesion of at least a part of the UV tape; and picking up at least a part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion by a heat conductive substrate, wherein the part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion is removed from the UV tape so as to obtain the optoelectronic semiconductor stamp, the heat conductive substrate comprises a buffer layer disposed on a heat conductive base, and the buffer layer adheres the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion. 
     In one embodiment, before the step of removing the epitaxial substrate, the manufacturing method further comprises: providing a light to irradiate a connection junction between the epitaxial substrate and at least a part of the optoelectronic semiconductor components. 
     In one embodiment, the step of removing the epitaxial substrate is to remove the epitaxial substrate by an etching process or a polishing process. 
     In one embodiment, a first pitch is defined between adjacent two of the optoelectronic semiconductor components on the optoelectronic semiconductor substrate, a second pitch is defined between adjacent two of optoelectronic semiconductor components of the optoelectronic semiconductor stamp, and the second pitch is greater than or equal to the first pitch. 
     In one embodiment, the second pitch is n times of the first pitch, and n is an integer greater than or equal to 1. 
     In one embodiment, the thermal conductivity of the heat conductive substrate is greater than 1 W/mK. 
     This disclosure also provides an optoelectronic semiconductor stamp, which comprises a heat conductive substrate and a plurality of optoelectronic semiconductor components. The heat conductive substrate comprises a heat conductive base and a buffer layer, and the buffer layer is disposed on the heat conductive base. The optoelectronic semiconductor components are adhered to the heat conductive base through the buffer layer, and the optoelectronic semiconductor components are separately disposed on the heat conductive substrate. The optoelectronic semiconductor stamp is formed by transferring at least a part of optoelectronic semiconductor components from an optoelectronic semiconductor substrate to the heat conductive substrate. 
     This disclosure further provides an optoelectronic semiconductor device, which comprises a target substrate and a plurality of optoelectronic semiconductor components. The target substrate has a plurality of electrical conductive portions. The optoelectronic semiconductor components comprises a plurality of electrodes, and the electrodes are disposed corresponding to and electrically connected to the electrical conductive portions. The optoelectronic semiconductor device is formed by transferring any of the above-mentioned optoelectronic semiconductor stamps to the target substrate. 
     In one embodiment, after the optoelectronic semiconductor stamp is pressed on the target substrate, the heat conductive base is heated to electrically connect the electrodes of the optoelectronic semiconductor components and the corresponding electrical conductive portions by eutectic bonding, and then the heat conductive substrate is removed. 
     In one embodiment, after the optoelectronic semiconductor stamp is pressed on the target substrate, the electrodes of the optoelectronic semiconductor components are electrically connected with the corresponding electrical conductive portions by anisotropic conductive film (ACF), and then the heat conductive substrate is removed. 
     In one embodiment, after the optoelectronic semiconductor stamp is pressed on the target substrate, the heat conductive substrate is removed, and then the electrodes of the optoelectronic semiconductor components are electrically connected with the corresponding electrical conductive portions by eutectic bonding. 
     In one embodiment, after the optoelectronic semiconductor stamp is pressed on the target substrate, the heat conductive substrate is removed, and then the electrodes of the optoelectronic semiconductor components are electrically connected with the corresponding electrical conductive portions by anisotropic conductive film (ACF). 
     In one embodiment, the optoelectronic semiconductor components on the heat conductive substrate of the optoelectronic semiconductor stamp are arranged in a polygon. 
     In one embodiment, the optoelectronic semiconductor device is a LED display device, a light sensing device, or a laser array. 
     As mentioned above, in this disclosure, the manufacturing method of the optoelectronic semiconductor stamp comprises steps of: pressing the optoelectronic semiconductor substrate to an UV tape; removing the epitaxial substrate, so that at least a part of the optoelectronic semiconductor components are adhered to the UV tape; decreasing adhesion of at least a part of the UV tape; and picking up at least a part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion by a heat conductive substrate. The part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion is removed from the UV tape so as to obtain the optoelectronic semiconductor stamp. Then, at least one optoelectronic semiconductor stamp can be transferred to the target substrate, or a plurality of optoelectronic semiconductor stamps can be combined and transferred to the target substrate, thereby obtaining the optoelectronic semiconductor device. Compared with the conventional manufacturing processes of optoelectronic device made of LEDs, which is to perform the epitaxial process, the photolithograph process, and the cutting processes (including half-cut, point measurement and full-cut processes) to obtain the individual optoelectronic semiconductor components, this disclosure does not need to transfer the optoelectronic semiconductor components to the target substrate one by one. As a result, this disclosure has the advantages of simple processes and short manufacturing time. Besides, this disclosure can achieve the goal of batch transferring, so that the optoelectronic semiconductor device can have shorter manufacturing time and lower cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       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: 
         FIG. 1  is a flow chart showing a manufacturing method of an optoelectronic semiconductor stamp according to an embodiment of this disclosure; 
         FIGS. 2A to 2F  are schematic diagrams showing the manufacturing procedures of an optoelectronic semiconductor stamp according to a first embodiment of this disclosure; 
         FIG. 2G  is a schematic diagram showing another optoelectronic semiconductor stamp according to the embodiment of this disclosure; 
         FIGS. 3A and 3B  are schematic diagrams showing the manufacturing procedure of an optoelectronic semiconductor device according to an embodiment of this disclosure; 
         FIGS. 4A and 4B  are schematic diagrams showing the combined shapes of the optoelectronic semiconductor devices according to different embodiments of this disclosure; 
         FIGS. 5A to 5D  are schematic diagrams showing the manufacturing procedures of an optoelectronic semiconductor stamp according to a second embodiment of this disclosure; and 
         FIGS. 6A to 6D  are schematic diagrams showing the manufacturing procedures of an optoelectronic semiconductor stamp according to a third embodiment of this disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE DISCLOSURE 
     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. The figures of all embodiments of the disclosure are merely illustrative and do not represent true dimensions, proportions or quantities. In addition, the orientations “upper” and “lower” as used in the following embodiments are merely used to indicate relative positional relationships. Furthermore, when defining that a component is “on,” “above,” “below,” or “under” another component, it can be realized that the two components are directly contacted with each other, or that the two components are not directly contacted with each other and an additional component is disposed between the two components. 
       FIG. 1  is a flow chart showing a manufacturing method of an optoelectronic semiconductor stamp according to an embodiment of this disclosure. The optoelectronic semiconductor stamp made by the manufacturing method of this disclosure can be used to fabricate, for example but not limited to, display devices, advertising billboards, sensing devices, laser arrays, light-emitting devices or illumination devices, or other types or functions of optoelectronic semiconductor devices. 
     The manufacturing method of an optoelectronic semiconductor stamp of this disclosure comprises steps of: providing an optoelectronic semiconductor substrate, wherein the optoelectronic semiconductor substrate comprises a plurality of optoelectronic semiconductor components separately disposed on an epitaxial substrate, and each of the optoelectronic semiconductor components comprises at least an electrode (step S 01 ); pressing the optoelectronic semiconductor substrate to an UV tape, wherein the electrodes of the optoelectronic semiconductor components are adhered to the UV tape (step S 02 ); removing the epitaxial substrate, wherein at least a part of the optoelectronic semiconductor components are adhered to the UV tape (step S 03 ); decreasing adhesion of at least a part of the UV tape (step S 04 ); and picking up at least a part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion by a heat conductive substrate, wherein the part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion is removed from the UV tape so as to obtain the optoelectronic semiconductor stamp, the heat conductive substrate comprises a buffer layer disposed on a heat conductive base, and the buffer layer adheres the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion (step S 05 ). 
     The detailed descriptions of the above steps will be illustrated hereinafter with reference to  FIGS. 2A to 2F .  FIGS. 2A to 2F  are schematic diagrams showing the manufacturing procedures of an optoelectronic semiconductor stamp according to a first embodiment of this disclosure. 
     As shown in  FIG. 1 , the step S 01  is to providing an optoelectronic semiconductor substrate. Referring to  FIG. 2A , the optoelectronic semiconductor substrate  2  comprises an epitaxial substrate  21  and a plurality of optoelectronic semiconductor components  22 . The optoelectronic semiconductor components  22  are separately disposed on the epitaxial substrate  21 , and each of the optoelectronic semiconductor components  22  comprises at least an electrode  221 . As shown in  FIG. 2A , the optoelectronic semiconductor substrate  2  is reversed, which means that the epitaxial substrate  21  is disposed on the top and the electrode  221  faces downwardly. In this embodiment, each optoelectronic semiconductor component  22  comprises two electrodes  221  and one main body  222 , and the main body  222  is disposed on the epitaxial substrate  21 . The electrodes  221  are disposed on the surface of the main body  222  away from the epitaxial substrate  21 . In this case, the optoelectronic semiconductor component  22  comprises flip-chip type electrodes or horizontal type electrodes. In other embodiments, the optoelectronic semiconductor component  22  may comprise vertical type electrodes, and this disclosure is not limited. 
     In some embodiments, the epitaxial substrate  21  can be a wafer plate, and can be made of transparent or opaque material, such as sapphire substrate, GaAs substrate or SiC substrate. In addition, the optoelectronic semiconductor components  22  can be arranged in an array (e.g. 2D array) and separately disposed on the epitaxial substrate  21 . Alternatively, the optoelectronic semiconductor components  22  can be alternately arranged and separately disposed on the epitaxial substrate  21 . This disclosure is not limited. Preferably, the optoelectronic semiconductor components  22  are arranged in a 2D array. 
     In this embodiment, the epitaxial substrate  21  is transparent sapphire substrate, and the material of the optoelectronic semiconductor components  22  is, for example but not limited to, GaN. In other embodiments, the material of the optoelectronic semiconductor components  22  can be other materials, such as AlGaAs, GaP, GaAsP, AlGaInP, or GaN. In addition, the optoelectronic semiconductor component  22  of this embodiment can be a blue LED chip, a green LED chip, a UV light LED chip, a laser LED chip, or a sensing chip (e.g. X-ray sensing chip). To be noted, the above-mentioned LED chip comprises a Mini LED chip or a Micro LED chip, and this disclosure is not limited. In general, the pitch of the optoelectronic semiconductor components  22  on the epitaxial substrate  21  is smaller. In this embodiment, a first pitch d 1  is defined between adjacent two of the optoelectronic semiconductor components  22  on the optoelectronic semiconductor substrate  2 . In some embodiments, the first pitch d 1  is, for example but not limited to, 20 μm. 
     As shown in  FIG. 2B , the step S 02  is to press the optoelectronic semiconductor substrate  2  to an UV tape  3 , wherein the electrodes  221  of the optoelectronic semiconductor components  22  are adhered to the UV tape  3 . In this embodiment, the electrodes  221  face downwardly and are pressed on the UV tape  3 , so that the UV tape  3  is adhered to the electrodes  221  of the optoelectronic semiconductor components  22 . 
     Next, the step S 03  is to remove the epitaxial substrate  21 , wherein at least a part of the optoelectronic semiconductor components  22  are adhered to the UV tape  3 . In this embodiment, before the step  03  of removing the epitaxial substrate  21 , another step is needed to provide a light to irradiate a connection junction between the epitaxial substrate  21  and at least a part of the optoelectronic semiconductor components  22  (see  FIG. 2C ). Specifically, in order to remove the epitaxial substrate  21  and remain at least a part of the optoelectronic semiconductor components  22  on the UV tape  3 , this embodiment is to provide a light to irradiate the connection junction between the epitaxial substrate  21  and all of the optoelectronic semiconductor components  22 , thereby decreasing the adhesion between the epitaxial substrate  21  and all of the optoelectronic semiconductor components  22 . For example, a laser (light L 1 ) is inputted from one side of the optoelectronic semiconductor substrate  2  away from the UV tape  3  (upper side of the optoelectronic semiconductor substrate  2 ) to irradiate the connection junction between the epitaxial substrate  21  and all of the optoelectronic semiconductor components  22 . The laser can provide energy to decompose the buffer layer (made of GaN) located at the connection junction between the material (GaN) of the optoelectronic semiconductor components  22  and the epitaxial substrate  21  (sapphire substrate), so that the optoelectronic semiconductor components  22  can be easily peeled off from the epitaxial substrate  21 . In this embodiment, the non-selective laser lift off (LLO) technology is used to destroy the GaN buffer layer located at the connection junction of all optoelectronic semiconductor components  22 , thereby decreasing the adhesion of all optoelectronic semiconductor components  22 . As a result, the optoelectronic semiconductor components  22  can be easily peeled off from the epitaxial substrate  21 . 
     After the step of providing a light to irradiate the connection junction between the epitaxial substrate  21  and all of the optoelectronic semiconductor components  22 , since the GaN buffer layer located at the connection junction has been destroyed, all optoelectronic semiconductor components  22  can be remained (adhered) on the UV tape  3  (see  FIG. 2D ) after the following step S 03  of removing the epitaxial substrate  21 . 
     Next, the adhesion of at least a part of the UV tape  3  is decreased (step S 04 ). As shown in  FIG. 2E , the UV light (light L 2 ) is provided to selectively irradiate a part of the UV tape  3  for curing the part of adhesive glue within the irradiated part, thereby selectively decreasing the adhesion of the UV tape  3 . In this embodiment, the UV light is provided from one side of the UV tape  3  away from the optoelectronic semiconductor components  22  (the lower side of the UV tape  3 ) to irradiate alternate optoelectronic semiconductor components  22 , thereby selectively curing a part of the adhesive glue of the UV tape  3 . Since the part of adhesive glue irradiated by the UV light is cured and solidified, the adhesion between the optoelectronic semiconductor components  22  and the adhesive glue within the irradiated part can be decreased. As shown in  FIG. 2E , the optoelectronic semiconductor components  22  corresponding to the irradiated part of the UV tape  3  are defined as one group. After repeating several times of step S 04 , a plurality of groups of optoelectronic semiconductor components  22  with decreased adhesion to the UV tape  3  can be provided for the following transferring process. Of course, it is also possible to provide all optoelectronic semiconductor components  22  with decreased adhesion to the UV tape  3  in one irradiation process (non-selective curing), and this disclosure is not limited. 
     Afterwards, as shown in  FIG. 2F , the step S 05  is performed to pick up at least a part of the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion by a heat conductive substrate  4 , wherein the part of the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion is removed from the UV tape  3  so as to obtain the optoelectronic semiconductor stamp S 1 . The heat conductive substrate  4  comprises a buffer layer  42  disposed on a heat conductive base  41 , and, in the step S 05  of picking up the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion, the buffer layer  42  of the heat conductive substrate  4  presses and adheres the optoelectronic semiconductor components  22 . The material of the heat conductive base  41  comprises glass, metal, alloy, ceramics, or semiconductor material. The buffer layer  42  can have adhesion and be patterned or non-patterned. The adhesive material of the buffer layer  42  can be polydimethylsiloxane (PDMS), silica gel, thermal tape, or epoxy. The thickness of the buffer layer  42  can be, for example, less than 25 μm. Excepting the adhesion, the buffer layer  42  can also provide elasticity, so that the requirement for planar degree of the contact surface of the optoelectronic semiconductor components  22  and the target substrate of the following transferring process is not so critical. 
     In this embodiment, since the adhesion between the buffer layer  42  and a part of the optoelectronic semiconductor components  22  is greater than the adhesion between the optoelectronic semiconductor components  22  and the UV tape  3  (result of step S 04 ), at least a part of the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion can be departed from the UV tape  3  and picked up by the heat conductive substrate  4  after the heat conductive substrate  4  is removed from the UV tape  3 . To be noted, the part of the optoelectronic semiconductor components  22  to be picked up by the heat conductive substrate  4  can be a part of the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion or all of the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion. The non-picked optoelectronic semiconductor components  22  can be remained on the UV tape  3 . Accordingly, the optoelectronic semiconductor stamp S 1  containing a plurality of optoelectronic semiconductor components  22  can be obtained. 
     As shown in  FIG. 2F , the optoelectronic semiconductor stamp S 1  of this embodiment can be manufactured by transferring at least a part of the optoelectronic semiconductor components  22  on the optoelectronic semiconductor substrate  2 . In this embodiment, the optoelectronic semiconductor stamp S 1  comprises a heat conductive substrate  4  and a plurality of optoelectronic semiconductor components  22  (which can be at least a part of the optoelectronic semiconductor components  22  on the optoelectronic semiconductor substrate  2 ) disposed on the heat conductive substrate  4 . The optoelectronic semiconductor components  22  are indirectly disposed on the heat conductive substrate  4  via the adhesive function of the buffer layer  42 . 
     In the optoelectronic semiconductor substrate  2 , a first pitch d 1  is defined between adjacent two of the optoelectronic semiconductor components  22  ( FIG. 2A ), and a second pitch d 2  is defined between adjacent two of optoelectronic semiconductor components  22  of the optoelectronic semiconductor stamp S 1  ( FIG. 2F ). The second pitch d 2  is greater than or equal to the first pitch d 1 . The second pitch d 2  is n times of the first pitch d 1 , and n is an integer greater than or equal to 1. In this embodiment, n is 2. To be noted, the term “pitch” is defined as the distance between the centers (or the left sides or the right sides) of two adjacent optoelectronic semiconductor components  22 . In this embodiment, the second pitch d 2  is twice of the first pitch d 1  (n=2). Of course, in other embodiments, the second pitch d 2  can also be 1 time, 3 times, 4 times, 5 times or more of the first pitch d 1 , and this can be determined based on the design requirement of the optoelectronic semiconductor device. 
     In addition, in the optoelectronic semiconductor stamp S 1  of  FIG. 2F , the surface of the buffer layer  42  of the heat conductive substrate  4  adhered to the optoelectronic semiconductor components  22  is a planar surface without pattern. In other embodiments, the surface of the buffer layer  42  adhered to the optoelectronic semiconductor components  22  can be a surface with a non-planar pattern. 
       FIG. 2G  is a schematic diagram showing another optoelectronic semiconductor stamp according to the embodiment of this disclosure. In the optoelectronic semiconductor stamp S 1   a  of  FIG. 2G  the buffer layer  42  of the heat conductive substrate  4   a  is configured with a pattern. In the heat conductive substrate  4   a , the parts of the buffer layer  42  for adhering the optoelectronic semiconductor components  22  have a thicker thickness (protrusion), and the parts of the buffer layer  42 , which do not adhere the optoelectronic semiconductor components  22 , have a thinner thickness. In the step S 05 , the heat conductive substrate  4   a  can pick up at least a part of the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion, so that the optoelectronic semiconductor components  22  corresponding to the part of the UV tape  3  with reduced adhesion can be departed from the UV tape  3  so as to obtain the optoelectronic semiconductor stamp S 1   a.    
     At least one of the optoelectronic semiconductor stamp S 1  (or S 1   a ) made by the above-mentioned method can be used to manufacturing an optoelectronic semiconductor device of this disclosure. 
       FIGS. 3A and 3B  are schematic diagrams showing the manufacturing procedure of an optoelectronic semiconductor device according to an embodiment of this disclosure. Taking the optoelectronic semiconductor stamp S 1  as an example, referring to  FIG. 3A , after the optoelectronic semiconductor stamp S 1  is pressed on a target substrate  5 , and then the electrodes  221  of the optoelectronic semiconductor components  22  on the optoelectronic semiconductor stamp S 1  are electrically connected with the corresponding electrical conductive portions  51  of the target substrate  5 . In this embodiment, the target substrate  5  comprises a plurality of electrical conductive portions  51 , and the electrical conductive portions  51  are disposed corresponding to the electrodes  221  of the optoelectronic semiconductor components  22 . In some embodiments, the optoelectronic semiconductor stamp S 1  is picked up (by grabbing or sucking) from one side (surface  411 ) of the heat conductive base  41  away from the optoelectronic semiconductor components  22 . In some embodiments, the thermal conductivity of the heat conductive substrate  4  (or heat conductive base) can be greater than 1 W/mK. Accordingly, a bonding machine (e.g. a ball bonder) can be used to grab or suck the heat conductive substrate  4  and to heat the heat conductive substrate  4 . Then, the heat can be transmitted through the heat conductive substrate  4  for heating the electrodes  221  of the optoelectronic semiconductor components  22  on the heat conductive substrate  4 , thereby electrically connecting the electrodes  221  to the corresponding electrical conductive portions  51  by eutectic bonding. Since the adhesion of the buffer layer  42  can be decreased at high temperature, the step of heating the heat conductive substrate  4  can facilitate the bonding of the optoelectronic semiconductor components  22  on the optoelectronic semiconductor stamp S 1  and the electrical conductive portions  51  of the target substrate  5 . Accordingly, this process can make the optoelectronic semiconductor components  22  be easily departed from the heat conductive substrate  4 . Then, the heat conductive substrate  4  can be removed. 
     Excepting the eutectic bonding, in other embodiments, after picking up the optoelectronic semiconductor stamp S 1  from the side of the heat conductive base  41  away from the optoelectronic semiconductor components  22  and pressing the optoelectronic semiconductor stamp S 1  on the target substrate  5 , the electrodes  221  of the optoelectronic semiconductor components  22  can be electrically connected with the corresponding electrical conductive portions  51  by anisotropic conductive film (ACF, not shown). Afterwards, the heat conductive substrate  4  can be removed. This disclosure is not limited. 
     When the bonder picks up and heats the heat conductive substrate  4 , the bonding force between the electrical conductive portions  51  and the electrodes  221  of the optoelectronic semiconductor components  22  (or the bonding force between the electrodes  221  and the ACF) is greater than the adhesion between the buffer layer  42  and the optoelectronic semiconductor components  22 , so that the heat conductive substrate  4  can be easily removed, and the optoelectronic semiconductor components  22  can be remained on the target substrate  5  and electrically connected with the electrical conductive portions  51  of the target substrate  5 . Accordingly, after the electrical connection bonding and removing the heat conductive substrate  4 , the target substrate  5  containing a plurality of optoelectronic semiconductor components  22  can be manufactured (see  FIG. 3B ). 
     To be noted, the above embodiment is to electrical connect the electrodes  221  with the corresponding electrical conductive portions  51  (by eutectic bonding or ACF) before removing the heat conductive substrate  4 , but this disclosure is not limited thereto. In other embodiments, an adhesive layer (not shown) can be applied on the target substrate  5 , and the adhesion between the adhesive layer and the optoelectronic semiconductor components  22  is greater than the adhesion between the optoelectronic semiconductor components  22  and the heat conductive substrate  4 . Accordingly, after picking up the optoelectronic semiconductor stamp S 1  and adhering the electrodes  221  of the optoelectronic semiconductor components  22  to the adhesive layer, the heat conductive substrate  4  is removed, and then the electrodes  221  of the optoelectronic semiconductor components  22  are electrically connected with the corresponding electrical conductive portions  51  by eutectic bonding or anisotropic conductive film (ACF). This disclosure is not limited. 
     In some embodiments, the target substrate  5  can be made of a transparent material, such as glass, quartz or the likes, plastics, rubber, glass fiber, or other polymer materials. In some embodiments, the target substrate  5  can be made of opaque materials, such as a metal-glass fiber composition plate, or a metal-ceramics composition plate. In addition, the target substrate  5  can be a rigid plate or a flexible plate, and this disclosure is not limited. In some embodiments, the target substrate  5  comprises a matrix circuit (not shown, the matrix circuit comprises the electrical conductive portions  51  arranged in an array). According to the circuit type, the matrix circuit can be an active matrix (AM) circuit or a passive matrix (PM) circuit. In some embodiments, the target substrate  5  can be a thin-film transistor (TFT) substrate. The TFT substrate is configured with thin-film components (e.g. thin-film transistors) and thin-film circuits. For example, the TFT substrate can be an AM TFT substrate or a PM TFT substrate. For example, the AM substrate (AM TFT substrate) comprises a matrix circuit containing interlaced data lines and scan lines and a plurality of thin-film transistors. Since the AM substrate or PM substrate can be easily understood by the skilled person in the art and is not the key point of this disclosure, so the detailed description thereof will be omitted. 
     Afterwards, the pressing step is repeated as shown in  FIG. 3B . After pressing another optoelectronic semiconductor stamp S 2  on the target substrate  5 , the electrodes  221  of the optoelectronic semiconductor components  22  of the optoelectronic semiconductor stamp S 2  are electrically connected with the corresponding electrical conductive portions  51  of the target substrate  5 . Accordingly, the optoelectronic semiconductor device  1  can be obtained. 
     To be noted, during manufacturing process of the optoelectronic semiconductor stamp S 2 , the step S 04  of decreasing the adhesion of at least a part of the UV tape  3  (see  FIG. 2E ) is to move the UV light (light L 2 ) irradiated positions by, for example, a first pitch d 1 , wherein the UV tape  3  is remained at the original position (the UV tape  3  is not moved). In addition, when electrically bonding the optoelectronic semiconductor stamp S 2  to the target substrate  5 , the target substrate  5  is not moved, and the optoelectronic semiconductor stamp S 2  is moved by a pitch (e.g. the second pitch d 2 ). Accordingly, a plurality of optoelectronic semiconductor components  22  of the optoelectronic semiconductor stamp S 2  can be disposed corresponding to the adjacent positions of the optoelectronic semiconductor components  22  of the optoelectronic semiconductor stamp S 1 , which have been transferred to the target substrate  5 . Therefore, regarding two adjacent optoelectronic semiconductor components  22  on the target substrate  5 , as shown in  FIG. 3B , if one of the optoelectronic semiconductor components  22  (e.g. an optoelectronic semiconductor component  22   a ) is from the optoelectronic semiconductor stamp S 1 , the other optoelectronic semiconductor component (e.g. an optoelectronic semiconductor component  22   b ) is from the optoelectronic semiconductor stamp S 2 , and the pitch between the two adjacent optoelectronic semiconductor components is still the second pitch d 2 . 
     In addition, the two adjacent optoelectronic semiconductor components  22  from the optoelectronic semiconductor stamp S 1  have a second pitch d 2 , so that the two adjacent optoelectronic semiconductor components  22  disposed on the target substrate also have a second pitch d 2 . The two adjacent optoelectronic semiconductor components  22  from the optoelectronic semiconductor stamp S 2  have a second pitch d 2 , so that the two adjacent optoelectronic semiconductor components  22  disposed on the target substrate also have a second pitch d 2 . Moreover, as shown in  FIG. 3B , the pitch between the leftmost optoelectronic semiconductor component ( 22   b ) from the optoelectronic semiconductor stamp S 2  and the rightmost optoelectronic semiconductor component ( 22   a ) from the optoelectronic semiconductor stamp S 1  can be a second pitch d 2  based on the design requirement. Of course, the pitch between the optoelectronic semiconductor component ( 22   b ) and the optoelectronic semiconductor component ( 22   a ) can be not equal to the second pitch d 2  based on the design requirement. Of course, the pitch between the two optoelectronic semiconductor components can be approximated to the second distance d 2  but not equal to the second distance d 2  due to the process accuracy. 
     As shown in  FIG. 3B , adjacent two optoelectronic semiconductor components (e.g.  22   a  and  22   b ) on the target substrate  5  of the optoelectronic semiconductor device  1  can be defined in one pixel or different pixels. In addition, the optoelectronic semiconductor component  22  from the optoelectronic semiconductor stamp S 1  and the optoelectronic semiconductor component  22  from the optoelectronic semiconductor stamp S 2  can emit the same color lights or different color lights, or can be the same kinds or types of optoelectronic semiconductor components or different kinds or types of optoelectronic semiconductor components. This disclosure is not limited. If the optoelectronic semiconductor component  22  from the optoelectronic semiconductor stamp S 1  and the optoelectronic semiconductor component  22  from the optoelectronic semiconductor stamp S 2  can emit the same color lights, the optoelectronic semiconductor device  1  can be a monochromatic LED display device. If the optoelectronic semiconductor component  22  from the optoelectronic semiconductor stamp S 1  and the optoelectronic semiconductor component  22  from the optoelectronic semiconductor stamp S 2  can emit different color lights, the optoelectronic semiconductor device  1  can be a full-color LED display device having, for example, red, green and blue pixels. This disclosure is not limited. 
     For example, in order to manufacturing an AM LED display device, only the bonding machine (e.g. a flip-chip bonding machine or a die bonding machine) in cooperate with the eutectic bonding process or ACF bonding process is required for transferring and combining a plurality of optoelectronic semiconductor components (LEDs) from the optoelectronic semiconductor stamp to the TFT substrate (target substrate) based on the required size or shape, thereby finishing the manufacturing of the AM LED display device. 
     As mentioned above, the optoelectronic semiconductor device  1  of this embodiment can be manufactured by transferring a plurality of optoelectronic semiconductor components  22  from the optoelectronic semiconductor substrate  2 . In one embodiment, a plurality of optoelectronic semiconductor components  22  are transferred from at least one optoelectronic semiconductor stamp to the target substrate  5  so as to obtain the optoelectronic semiconductor device  1 . In other words, the optoelectronic semiconductor components  22  are batch transferred from the optoelectronic semiconductor stamp S 1  to the target substrate  5  and then combined to fabricate the optoelectronic semiconductor device  1  of the desired size and shape. As shown in  FIG. 3B , the optoelectronic semiconductor device  1  of this embodiment comprises a target substrate  5  and a plurality of optoelectronic semiconductor components  22  from the optoelectronic semiconductor stamps (S 1  and S 2 ), and the electrodes  221  of the optoelectronic semiconductor components  22  are electrically connected with the corresponding electrical conductive portions  51  of the target substrate  5 . In some embodiments, the electrodes  221  can be electrically connected with the corresponding electrical conductive portions  51  by eutectic bonding or ACF bonding. In addition, the second pitch d 2  between two adjacent optoelectronic semiconductor components  22  on the target substrate  5  can be greater than or equal to the first pitch d 1  between two adjacent optoelectronic semiconductor components  22  on the optoelectronic semiconductor stamps. The second pitch d 2  is n times of the first pitch d 1 , and n is an integer greater than or equal to 1. In some embodiments, the optoelectronic semiconductor device  1  can be an LED display device, a light sensing device, or a laser array. In this embodiment, the LED display device also comprises a Mini LED display device or a Micro LED display device. 
     In some embodiments, the optoelectronic semiconductor components on the heat conductive substrate of the optoelectronic semiconductor stamp (S 1  or S 2 ) can be arranged in a polygon shape, such as, for example but not limited to, a triangle, a square, a diamond, a rectangle, a trapezoid, a parallelogram, a hexagon, or an octagon, . . . or other shapes. Accordingly, the required optoelectronic semiconductor components  22  can be transferred from the optoelectronic semiconductor stamps (S 1  and/or S 2 ) to the target substrate  5  and then combined to obtain the optoelectronic semiconductor device in the desired shape (e.g. a rectangle). This configuration can increase the total utility rate of the circular wafer. 
       FIGS. 4A and 4B  are schematic diagrams showing the combined shapes of the optoelectronic semiconductor devices  1   a  and  1   b  according to different embodiments of this disclosure. As shown in  FIGS. 4A and 4B , a plurality of optoelectronic semiconductor stamps are transferred to and combined on the target substrate  5 , and the target substrate  5  is correspondingly covered by a plurality of optoelectronic semiconductor stamps, thereby forming a rectangular display device. The stamp covering range is the arranging shape of the optoelectronic semiconductor components on the heat conductive substrate of the optoelectronic semiconductor stamp, and the stamp covering range can be a polygonal shape. In the optoelectronic semiconductor device  1   a  of  FIG. 4A , the stamp covering range A 1  on the target substrate  5  is an octagon, and the stamp covering range A 2  on the target substrate  5  is a diamond. In the optoelectronic semiconductor device  1   b  of  FIG. 4B , the stamp covering range B on the target substrate  5  is a hexagon. This disclosure is not limited thereto. In other embodiments, the stamp covering range can be designed as other shapes, such as a square, a rectangle, a trapezoid, a parallelogram, a circle, . . . or other shapes depending on the design requirement. In addition, the stamp covering range of a later pressing process can cover (or partially overlap) at least one of the stamp covering ranges of the previous pressing processes. Alternatively, the stamp covering range of a later pressing process can not cover (or not overlap) at least one of the stamp covering ranges of the previous pressing processes. This disclosure is not limited. 
       FIGS. 5A to 5D  are schematic diagrams showing the manufacturing procedures of an optoelectronic semiconductor stamp S 3  according to a second embodiment of this disclosure, and  FIGS. 6A to 6D  are schematic diagrams showing the manufacturing procedures of an optoelectronic semiconductor stamp S 4  according to a third embodiment of this disclosure. 
     Different from the first embodiment, in the second embodiment as shown in  FIGS. 5A to 5D , the epitaxial substrate  21  is a GaAs substrate, and the optoelectronic semiconductor components  22  can be red LED chips, yellow LED chips, laser LED chips, sensing chips, or IR chips. In addition, as shown in  FIGS. 5A and 5B , the step S 03  of removing the epitaxial substrate  21  is to directly remove the epitaxial substrate  21  by an etching process (wet etching process) or a polishing process. The other steps of the manufacturing method of the optoelectronic semiconductor stamp S 3  of the second embodiment are the same as the first embodiment, so the detailed descriptions thereof will be omitted. 
     Different from the first embodiment, in the third embodiment as shown in  FIGS. 6A to 6D , before the step S 03  of removing the epitaxial substrate  21 , a light is provided to irradiate the connection junction between the epitaxial substrate  21  and a part of the optoelectronic semiconductor components  22  (selective laser lift off (LLO) technology). For example, the optoelectronic semiconductor components  22  are alternately irradiated by the light. Afterwards, in the step S 03  of removing the epitaxial substrate  21 , as shown in  FIG. 3B , a part of the optoelectronic semiconductor components  22 , which are not irradiated by the light L 1 , can be remained on the epitaxial substrate  21 , and the other optoelectronic semiconductor components  22 , which are irradiated by the light L 1 , can be remained on the UV tape  3  after removing the epitaxial substrate  21 . In addition, as shown in  FIG. 6C , this embodiment is to provide non-selective UV light (light L 2 ) to irradiate the UV tape  3  for curing the adhesive glue of the UV tape  3 . Accordingly, the adhesion between all optoelectronic semiconductor components  22  and the UV tape  3  can be decreased. The other steps of the manufacturing method of the optoelectronic semiconductor stamp S 4  of the third embodiment are the same as the first embodiment, so the detailed descriptions thereof will be omitted. 
     In summary, the manufacturing method of the optoelectronic semiconductor stamp comprises steps of: pressing the optoelectronic semiconductor substrate to an UV tape; removing the epitaxial substrate, so that at least a part of the optoelectronic semiconductor components are adhered to the UV tape; decreasing adhesion of at least a part of the UV tape; and picking up at least a part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion by a heat conductive substrate. The part of the optoelectronic semiconductor components corresponding to the part of the UV tape with reduced adhesion is removed from the UV tape so as to obtain the optoelectronic semiconductor stamp. Then, at least one optoelectronic semiconductor stamp can be transferred to the target substrate, or a plurality of optoelectronic semiconductor stamps can be combined and transferred to the target substrate, thereby obtaining the optoelectronic semiconductor device. Compared with the conventional manufacturing processes of optoelectronic device made of LEDs, which is to perform the epitaxial process, the photolithograph process, and the cutting processes (including half-cut, point measurement and full-cut processes) to obtain the individual optoelectronic semiconductor components, this disclosure does not need to transfer the optoelectronic semiconductor components to the target substrate one by one. As a result, this disclosure has the advantages of simple processes and short manufacturing time. Besides, this disclosure can achieve the goal of batch transferring, so that the optoelectronic semiconductor device can have shorter manufacturing time and lower cost. 
     Although the disclosure has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the disclosure.