Patent Publication Number: US-2022238364-A1

Title: Alignment holder and testing apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation application of and claims the priority benefit of a prior application Ser. No. 17/120,296, filed on Dec. 14, 2020, now pending. The prior application Ser. No. 17/120,296 is a divisional application of and claims the priority benefit of U.S. patent application Ser. No. 16/392,599, filed on Apr. 23, 2019, now patented as U.S. Pat. No. 10,867,827B2. which claims the priority benefit of U.S. provisional application Ser. No. 62/737,114, filed on Sep. 27, 2018. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification. 
    
    
     BACKGROUND 
     Semiconductor devices are used in a variety of electronic applications, such as personal computers, cell phones, digital cameras, and other electronic equipment. Semiconductor devices are typically fabricated by sequentially depositing insulating or dielectric layers, conductive layers, and semiconductor layers of material over a semiconductor substrate, and patterning the various material layers using lithography to form circuit components and elements thereon. Many integrated circuits are typically manufactured on a single semiconductor wafer. The dies of the wafer may be processed and packaged at the wafer level, and various technologies have been developed for wafer level packaging. 
     In molded electronic and electric parts containing inserting components such as encapsulated semiconductor devices and resin insulating transformers, the interface between the resin and the inserting component subjected to high residual stress due to the cure shrinkage of the resin and the coefficient of the thermal expansion mismatch between the resin and the inserting components. These thermal stress sometimes causes delamination during operations of the components and reliability tests 
     Such a delamination at adhering interfaces not only results in corrosion of electric wiring materials and electric insulating degradation, but also causes a variety of other damages, such as cracking of the resin and wire breaking due to the stress concentration by the delamination. Therefore, the evaluation of bonding strength of a composite structure is therefore a critical issue in assuring the reliability of such composite structure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The aspects of the present disclosure are best understood from the following detailed description when read with the accompanying figures. It is noted that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. 
         FIG. 1  illustrates a schematic view of a testing apparatus in accordance with some embodiments. 
         FIG. 2  illustrates a partial cross-sectional view of an alignment holder in accordance with some embodiments. 
         FIG. 3  illustrates a partial cross-sectional view of an alignment holder in accordance with some embodiments. 
         FIG. 4  illustrates a schematic top view of a lower holder of an alignment holder in accordance with some embodiments. 
         FIG. 5  illustrates a schematic view of an alignment holder in an intermediate stage of operation in accordance with some embodiments. 
         FIG. 6  illustrates a schematic view of a testing apparatus in a testing stage in accordance with some embodiments. 
         FIG. 7  illustrates a schematic view of a testing apparatus in a testing stage in accordance with some embodiments. 
         FIG. 8  illustrates a partial cross-sectional view of an alignment holder in accordance with some embodiments. 
         FIG. 9  illustrates a schematic view of a testing apparatus in a testing stage in accordance with some embodiments. 
         FIG. 10  illustrates a block diagram of a method for manufacturing a semiconductor package in accordance with some embodiments. 
         FIG. 11  illustrates a cross-sectional view of a semiconductor package in accordance with some embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     The following disclosure provides many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. 
     Further, spatially relative terms, such as “beneath,” “below,” “lower,” “above,” “upper” and the like, may be used herein for ease of description to describe one element or feature&#39;s relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The apparatus may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein may likewise be interpreted accordingly. 
     Other features and processes may also be included. For example, testing structures may be included to aid in the verification testing of the 3D packaging or 3DIC devices. The testing structures may include, for example, test pads formed in a redistribution layer or on a substrate that allows the testing of the 3D packaging or 3DIC, the use of probes and/or probe cards, and the like. The verification testing may be performed on intermediate structures as well as the final structure. Additionally, the structures and methods disclosed herein may be used in conjunction with testing methodologies that incorporate intermediate verification of known good dies to increase the yield and decrease costs. 
       FIG. 1  illustrates a schematic view of a testing apparatus in accordance with some embodiments.  FIG. 2  illustrates a partial cross-sectional view of an alignment holder in accordance with some embodiments. With now reference to  FIG. 1  and  FIG. 2 , a testing apparatus  100  shown in  FIG. 1  is configured to test a bonding strength of a composite specimen  10 . In some embodiments, the composite specimen  10  may be a composite structure including multiple components bonding together, and the testing apparatus  100  is configured to test/measure the bonding strength between the components around interfaces thereof. In some embodiments, the composite specimen  10  may be a semiconductor package including a plurality of components (e.g. encapsulation materials, through vias, semiconductor devices, etc.) bonding with one another, such that the composite specimen  10  includes a plurality of bonding interfaces. The materials of the plurality of components may be different from one another. For example, the composite specimen  10  may include Integrated Fan Out (InFO) packages, Chip on Wafer on Substrate (CoWoS) packages, flip chip packages and other semiconductor packages. 
     In some embodiments, for example, the composite specimen  10  may be an encapsulated semiconductor device, which includes a semiconductor device  11  encapsulated by an encapsulating material  12 , and a plurality of through vias (conductive pillars)  13  surrounding the semiconductor device  11  and extending through the encapsulating material  12  as shown in  FIG. 1  and  FIG. 2 . The encapsulating material  12  reveals electrical terminals of the semiconductor device  11  and the end surfaces of the through vias  13 . In the embodiments of the composite specimen  10  being the encapsulated semiconductor device, the composite specimen  10  may be in a wafer form. In some embodiments, the testing apparatus  100  are provided to test/measure the bonding strength (i.e. delamination durability) of the composite specimen (encapsulated semiconductor device)  10  at the bonding interfaces (e.g. bonding interfaces between the encapsulation material  12  and the through vias  13 , bonding interfaces between encapsulation material  12  and the semiconductor device  11 , etc.) thereof. 
     In some embodiments, the materials of the components in the composite specimen  10  may be different from one another. For example, the material of the encapsulating material  12  may include epoxy or other suitable resins. In some embodiments, the encapsulating material  12  may be epoxy resin containing chemical filler. The material of a substrate of the semiconductor device  11  may include bulk silicon, doped or undoped, or an active layer of a silicon-on-insulator (SOI) substrate. Generally, an SOI substrate includes a layer of a semiconductor material such as silicon, germanium, silicon germanium, SOI, silicon germanium on insulator (SGOI), or combinations thereof. Other substrates that may be used include multi-layered substrates, gradient substrates, or hybrid orientation substrates. The material of the through vias  13  may include a copper (Cu) and/or a copper-based alloy, etc. In some embodiments, the materials of some components in the composite specimen  10  may be the same, and the testing apparatus  100  is also configured for testing the bonding strength between the components with the same materials. 
     In some embodiments, the testing apparatus  100  includes an alignment holder  105  for holding the composite specimen  10  and a force applying bar  140  for applying a force to the composite specimen  10 . In some embodiments, the alignment holder  105  includes a holder body  110  and a positioning mechanism  130 . The holder body  110  is configured to clamp a first side (e.g. right side) of the composite specimen  10 . In one of the implementations, the holder body  110  may include an upper holder  112  and a lower holder  114 , and the first side of the composite specimen  10  is configured to be disposed between the upper holder  112  and the lower holder  114 . In some embodiments, the holder body  110  may further include a locking member  118 . The locking member  118  is coupled between the upper holder  112  and the lower holder  114 , and a distance G 1  between the upper holder  112  and the lower holder  114  can be adjusted by the locking member  118 . For instance, the locking member  118  can be a screw. The upper holder  112  and the lower holder  114  each has a threaded hole correspondingly. As such, the distance G 1  between the upper holder  112  and the lower holder  114  can be adjusted according to how deep the locking member  118  is screwed into the threaded holes of the upper holder  112  and the lower holder  114 . 
       FIG. 3  illustrates a partial cross-sectional view of an alignment holder in accordance with some embodiments.  FIG. 4  illustrates a schematic top view of a lower holder of an alignment holder in accordance with some embodiments. With now reference to  FIG. 3  and  FIG. 4 , in some embodiments, the holder body  110  may further include a groove  1141  for receiving the composite specimen  10 . In accordance with some embodiments of the disclosure, the groove  1141  crosses over the lower holder  114  as shown in  FIG. 3  and  FIG. 4 , such that the composite specimen  10  is configured to be moved along a moving direction D 1  within the groove  1141 . In other words, the groove  1141  may be functioned as a sliding rail for the composite specimen  10  to slide relatively to the holder body along the groove  1141 . With such arrangement, the upper holder  112  and the lower holder  114  may be in contact with each other when clamping the composite specimen  10 . In other embodiments, the groove  1141  may be disposed on the upper holder  112  and/or the lower holder  114  to be functioned as the sliding rail for the composite specimen  10 . The depth of the groove  1141  can be adjusted according to actual requirements, such as the thickness of the composite specimen  10 , the configuration of the holder body  110 , etc. 
       FIG. 5  illustrates a schematic view of an alignment holder in an intermediate stage of operation in accordance with some embodiments. With now reference to  FIG. 1  and  FIG. 5 , in some embodiments, the alignment holder  105  may further include a supporter  120  detachably connected to a lower part of the holder body  110  for supporting a lower surface of the composite specimen  10 . In some embodiments, the supporter  120  may be detachably connected to the lower holder  114 . In accordance with some embodiments of the disclosure, the supporter  120  is detachably connected to the lower holder  114  through mechanical engagement. For example, the supporter  120  may include at least one protrusion (e.g. the protrusion  122  illustrated in in  FIG. 5 ), and the lower holder  114  may correspondingly include at least one concave (e.g. the concave  1142  illustrated in in  FIG. 5 ). With such arrangement, the supporter  120  can be detachably connected to the lower holder  114  through the engagement of the protrusion  122  of the supporter  120  and the concave  1142  of the lower holder  114 , but the disclosure is not limited thereto. Any form of mechanical engagement or any suitable connections may be applied to the supporter  120  and the lower holder  114 . In alternative embodiments, the supporter  120  may be detachably connected to the lower holder  114  through magnetic force. For example, the supporter  120  and the lower holder  114  may each include a magnetic component, and the magnetic components in the supporter  120  and the lower holder  114  are configured to be attracted to each other. 
     In some embodiments, the supporter  120  can be firstly attached (connected) to the lower holder  114  when the composite specimen  10  is placed between the upper holder  112  and the lower holder  114 , so the lower surface of the composite specimen  10  can lean on the supporter  120  for holding and supporting the composite specimen  10  in place. Then, when the composite specimen  10  is adjusted to a desired clamping position, the distance G 1  between the upper holder  112  and the lower holder  114  can be adjusted (shortened) by, for example, screwing the locking member  118  into the threaded holes of the upper holder  112  and the lower holder  114 . That is to say, the tightness of the holder body  110  for clamping the composite specimen  10  can be controlled by the locking member  118 , so as to hold the composite specimen  10  in place. 
     With now reference to  FIG. 1 , in some embodiments, the positioning mechanism  130  is configured to lean against a second side (e.g. left side) of the composite specimen  10  and move relatively to the holder body  110  for adjusting a clamping position of the composite specimen  10  clamped by the holder body  110 . In some embodiments, the holder body  110  may further include a base  116 . The upper holder  112  and the lower holder  114  are disposed on the base  116 , and the positioning mechanism  130  is movably coupled to the base  116 . In accordance with some embodiments of the disclosure, the positioning mechanism  130  includes at least one positioning rod  132  (two positioning rods  132  are illustrated herein, but not limited thereto) and a positioning plate  134  coupled to the positioning rod  132 . Correspondingly, the base  116  includes at least one positioning hole  1161  (two positioning holes  1161  are illustrated herein, but not limited thereto), and the positioning rods  132  are movably engaged with the positioning holes  1161  respectively. The positioning plate  134  is configured to lean against a second side (e.g. left side) of the composite specimen  10  and move along with the positioning rod  132 . For example, the positioning holes  1161  may be threaded holes, and the positioning rods  132  may be threaded rods. As such, one end of the positioning rod  132  may penetrate the positioning plate  134  and another end of the positioning rod  132  is screwed into the positioning holes  1161 , so that the positioning rod  132  is configured to drive the positioning plate  134  to move toward or away from the holder body  110 . In some embodiments, a nub  136  may be disposed on a cantilever end of each positioning rod  132  to facilitate the operation of the positioning rod  132 . 
     With now reference to  FIG. 2 , in accordance with some embodiments of the disclosure, a length L 1  of the supporter  120  is substantially shorter than a length L 2  of the composite specimen  10  exposed by the upper holder  112  and the lower holder  114  of the holder body  110 . Accordingly, the positioning mechanism  130  is capable of pushing the second side of the composite specimen  10  toward the holder body  110  without interfering with the supporter  120 . In some embodiments, the positioning mechanism  130  is configured to lean against the second side of the composite specimen  10 , which is opposite to the first side of the composite specimen  10  where the upper holder  112  and the lower holder  114  are clamped. 
       FIG. 6  illustrates a schematic view of a testing apparatus in a testing stage in accordance with some embodiments. With now reference to  FIG. 1  and  FIG. 6 , with such arrangement, when a user want to adjust the clamping position of the composite specimen  10 , the user may just simply rotate the nubs  136  along the rotating direction R 1  to screw the positioning rods  132  into the positioning holes  1161 . Accordingly, the positioning plate  134  is driven to move along with the positioning rods  132 , and pushes the composite specimen  10  to move toward the holder body  110 . When the composite specimen  10  is moved to a desired clamping position, the user just simply stops the rotation of the nub  136  and screws the locking member  118  further into the upper holder  112  and the lower holder  114  to lock the composite specimen  10  in place. Then, the positioning mechanism  130  may be removed by rotate the nub  136  conversely to unscrew the positioning rods  132  from the positioning holes  1161 . The supporter  120  may also be removed by, for example, disengaging the supporter  120  from the lower holder  114 . Then, a force may be applied to a part of the composite specimen  10  by a force applying bar  140  to test the bonding strength of the composite specimen  10 . In some embodiments, the force applying bar  140  may be a cantilever beam. In some embodiments, the cantilever end of the force applying bar  140  is configured for abutment with an upper surface of the composite specimen  10  to apply force thereon. Therefore, the positioning and the alignment of the composite specimen  10  can be well controlled by the upper holder  112 , the lower holder  114  and the positioning mechanism  130 , and manual error and false test result caused by shift or misalignment of the composite specimen  10  can be avoided. 
     With now reference to  FIG. 2 , in accordance with some embodiments of the disclosure, the upper holder  112  includes an inclined surface  1121  at a tip of the upper holder  112  for aligning with the first side of the composite specimen  10 . In some embodiments, the upper holder  112  may be a wedge block. With such arrangement, the view angle of the user would not be blocked by the upper edge of the upper holder  112 , so the user may have better observation on the composite specimen  10  during the adjusting of the clamping position of the composite specimen  10 . 
     In accordance with some embodiments of the disclosure, the force may be applied to an interface between two components of the composite specimen  10  by the force applying bar  140 . In some embodiments, the force applying bar  140  is configured to move toward the composite specimen  10  along a direction perpendicular to a surface (e.g. an upper surface) of the composite specimen  10 . For example, the force may be applied on an upper surface at the interface between the encapsulating material  12  and the semiconductor device  11  or the interface between the encapsulating material  12  and the through vias  13 . Accordingly, the bonding strength between the encapsulating material  12  and the semiconductor device  11  and the bonding strength between the encapsulating material  12  and the through vias  13  can be tested/measured. As such, bonding strength (delamination durability) can be determined by measuring the applied force during an increment of delamination growth at the interface. With the application of the alignment holder  105 , the clamping position can be well controlled to expose the interface to be tested without shifting, so the force can be applied to the interface of the composite specimen  10  precisely. For example, the composite specimen  10  is firstly clamped by the holder body  110 , and then pushed toward the holder body  110  by the positioning mechanism  130  to adjust the clamping position more precisely, so as to avoid or reduce misalignment (position shifting) of the composite specimen  10  resulting from manual placement of the composite specimen  10 . As such, accuracy of testing result of the testing apparatus  100  can be improved. 
     In accordance with some embodiments of the disclosure, for a bending test, the force applying bar  140  is moved along a direction from the upper holder  112  toward the lower holder  114  to apply a bending force toward the composite specimen  10 . In some embodiments, a longitudinal axis A 1  of the force applying bar  140  is substantially perpendicular to an applying surface (e.g. the upper surface) of the composite specimen  10 , and the bending force is applied by the tip of the force applying bar  140  as it is shown in  FIG. 6 . 
       FIG. 7  illustrates a schematic view of a testing apparatus in a testing stage in accordance with some embodiments. With now reference to  FIG. 7 , in accordance with some embodiments of the disclosure, for a shear test, after the positioning mechanism  130  and the supporter  120  are removed, the holder body  110  can be placed in an upright position as it is shown in  FIG. 7 . As such, the composite specimen  10  clamped by the holder body  110  is also in an upright position. Accordingly, the longitudinal axis A 1  of the force applying bar  140  is substantially parallel to an applying surface (e.g. lower surface) of the composite specimen  10 , and the shear stress is applied by the side surface of the force applying bar  140  as it is shown in  FIG. 7 . In the embodiments of performing the shear test, the force applying bar  140  is moved along a direction from the lower holder  114  toward the upper holder  112  to apply a shear stress toward the composite specimen  10 . Therefore, the alignment holder  105  provides the testing apparatus  100  more precision in alignment and more flexibility in operation of tests. With such arrangement, the alignment holder  105  and the testing apparatus  100  having the alignment holder  105  are capable of performing a bending test, a shear test, a scratch test, an indent test, or any other suitable tests that includes alignment and force application. Therefore, the application of the testing apparatus  100  having the alignment holder  105  is more versatile and the alignment of the composite specimen  10  and the testing result can be more precise. 
     In accordance with some embodiments of the disclosure, the composite specimen  10 ′ may be an encapsulated semiconductor device, which includes a first semiconductor device  11 , a second semiconductor device  14 , a first encapsulating material  12   a , and a second encapsulating material  12   b . In some embodiments, the first semiconductor device  11  is encapsulated by the first encapsulating material  12   a , and the second semiconductor device  14  is encapsulated by the second encapsulating material  12   b . The first encapsulating material  12   a  and the second encapsulating material  12   b  are bonded with each other. In some embodiments, the structure of the first semiconductor device  11  encapsulated by the first encapsulating material  12   a , and the structure of the second semiconductor device  14  encapsulated by the second encapsulating material  12   b  may be formed in separate steps. 
     For example, the structure of the first semiconductor device  11  encapsulated by the first encapsulating material  12   a  may be pre-formed and provided, and the second encapsulating material  12   b  is then formed to encapsulate the second semiconductor device  14  and bonding with the first encapsulating material  12   a . In some embodiments, the first encapsulating material  12   a  and the second encapsulating material  12   b  may be over molding to cover the first semiconductor device  11  and the second semiconductor device  14 . Then, a planarizing process may be performed on the first encapsulating material  12   a  and the second encapsulating material  12   b  to reveal the first semiconductor device  11  and the second semiconductor device  14 . The planarizing process may include mechanical grinding or chemical mechanical polishing (CMP), for example. After the grinding process, a cleaning step may be optionally performed, for example, to clean and remove the residue generated from the grinding step. However, the disclosure is not limited thereto, and the planarizing step may be performed through any other suitable method. 
     With such arrangement, the force may be applied to the interface between the first semiconductor device  11  and the first encapsulating material  12   a , the interface between the second semiconductor device  14  and the second encapsulating material  12   b , and the interface between the first encapsulating material  12   a  and the second encapsulating material  12   b  to test the bonding strength thereof. In some embodiments, the materials of the first encapsulating material  12   a  and the second encapsulating material  12   b  may be the same. For example, the material of the first encapsulating material  12   a  and the second encapsulating material  12   b  may include epoxy or other suitable resins. In some embodiments, the first encapsulating material  12   a  and the second encapsulating material  12   b  may be epoxy resin containing chemical filler. In alternative embodiments, the materials of the first encapsulating material  12   a  and the second encapsulating material  12   b  may be different from each other. The first semiconductor device  11  and/or the second semiconductor device  14  may be high bandwidth memory (HBM) dies, or any other suitable semiconductor devices. In some embodiments, at least one of the first semiconductor device  11  and the second semiconductor device  14  may be a dummy die merely for testing purpose, so as to further reduce the cost for testing. 
     In accordance with some embodiments of the disclosure, for a bending test, the force applying bar  140  can be moved along a direction from the upper holder  112  toward the lower holder  114  to apply a bending force toward the composite specimen  10 . In some embodiments, the longitudinal axis of the force applying bar  140  is substantially perpendicular to an applying surface (e.g. the upper surface) of the composite specimen  10 ′, and the bending force is applied by the tip of the force applying bar  140  as it is shown in  FIG. 8 . 
       FIG. 9  illustrates a schematic view of a testing apparatus in a testing stage in accordance with some embodiments. With now reference to  FIG. 9 , in accordance with some embodiments of the disclosure, for a shear test, after the positioning mechanism  130  and the supporter  120  are removed, the holder body  110  can be placed in an upright position as it is shown in  FIG. 9 . As such, the composite specimen  10 ′ clamped by the holder body  110  is also in an upright position. Accordingly, the longitudinal axis of the force applying bar  140  is substantially parallel to an applying surface (e.g. lower surface) of the composite specimen  10 ′, and the shear stress is applied by the side surface of the force applying bar  140  as it is shown in  FIG. 9 . In the embodiments of performing the shear test, the force applying bar  140  is moved along a direction from the lower holder  114  toward the upper holder  112  to apply a shear stress toward the composite specimen  10 ′. In general, the composite specimen  10 ′ including the first encapsulating material  12   a  and the second encapsulating material  12   b  bonding with each other is easily to crack at the lower surface of the composite specimen  10 ′ when subjected to high residual stress due to, for example, cure shrinkage of the encapsulating materials  12   a ,  12   b . Therefore, the shear test as it is shown in  FIG. 9  is inevitable for the composite specimen  10 ′. 
     In accordance with some embodiments of the disclosure, the alignment holder  105  provides the testing apparatus  100  more precision in alignment and more flexibility in operation of tests. With such arrangement, the alignment holder  105  and the testing apparatus  100  having the alignment holder  105  are capable of performing a bending test, a shear test, a scratch test, an indent test, or any other suitable tests that includes alignment and force application. 
     With now reference to  FIG. 1 ,  FIG. 10  and  FIG. 11 , in accordance with some embodiments of the disclosure, the method for manufacturing a semiconductor package  50  as shown in  FIG. 11  may include the following steps. It is noted that the following description is illustrated regarding the embodiment of the method is applied to the composite specimen (encapsulated semiconductor device)  10  shown in  FIG. 1 , but the disclosure is not limited thereto. It should be understood that the method and the testing apparatus  100  might also be applied to any suitable specimens. 
     First, performing step S 110 , an encapsulated semiconductor device  10  including an encapsulating material  12  and a semiconductor device  11  encapsulated by the encapsulating material  12  is provided. In some embodiments, the encapsulated semiconductor device  10  is formed by a semiconductor process. Such semiconductor process may include providing a semiconductor device  11  and a plurality of through vias (conductive pillars)  13  and then providing an encapsulating material  12  to encapsulate the semiconductor device  11  and the conductive pillars  13 . In some embodiments, the semiconductor device  11  and the through vias (conductive pillars)  13  may be provided on a carrier (not shown), and the carrier may be removed during the sequential testing process. In some embodiments, the carrier may be a glass carrier, a ceramic carrier, or the like. The conductive pillars  13  may be pre-formed, and are then placed on the carrier. In alternative embodiments, the conductive pillars  13  may be formed by, for example, plating process. The plating of the conductive pillars  130  may be performed before the placement of the semiconductor device  11 . In some embodiments, the encapsulating material  12  may include a molding compound, an epoxy, or a resin, etc. In some embodiments, a thinning process, which may be a grinding process, may be optionally performed to thin the encapsulating material  12  for revealing the through vias  13  and electrical terminals of the semiconductor device  11 . 
     Then, performing step S 120 , a testing apparatus  100  including a holder body  110 , a positioning mechanism  130  and a force applying bar  140  as it is shown in  FIG. 1  is provided. The testing apparatus  100  is provided to test/measure the bonding strength (i.e. delamination durability) of the encapsulated semiconductor device  10  at the bonding interfaces (e.g. bonding interfaces between the encapsulation material  12  and the through vias  13 , bonding interfaces between encapsulation material  12  and the semiconductor device  11 , etc.) thereof. 
     Then, performing step S 130 , a first side of the encapsulated semiconductor device (composite specimen)  10  is clamped by the holder body  110 . In some embodiments, the first side (e.g. the right side) of the encapsulated semiconductor device  10  is placed between the upper holder  112  and the lower holder  114  of the holder body  110 . In the embodiments of the testing apparatus  100  having a stopper  120  shown in  FIG. 1 , the supporter  120  can be firstly attached (connected) to the lower holder  114  before the encapsulated semiconductor device  10  is placed between the upper holder  112  and the lower holder  114 . Thereby, the lower surface of the encapsulated semiconductor device  10  can lean on the supporter  120  for holding and supporting the encapsulated semiconductor device  10  in place. In some embodiments, the supporter  120  can be detachably connected to the lower holder  114  by mechanical engagement, magnetic force, or any suitable means. 
     Then, performing step S 140 , the clamping position of the encapsulated semiconductor device  10  is adjusted by the positioning mechanism  130 . For example, in some embodiments, a second side of the encapsulated semiconductor device  10  is pushed toward the holder body  110  by the positioning mechanism  130  for adjusting the clamping position of the encapsulated semiconductor device  10 . In some embodiments, the positioning mechanism  130  leans against the second side (e.g. left side) of the encapsulated semiconductor device  10  opposite to the first side where the holder body  110  is clamped, and configured to pushes the second side of the encapsulated semiconductor device  10  toward the holder body  110  in a controllable way. When the encapsulated semiconductor device  10  is pushed and adjusted to a desired clamping position, the upper holder  112  and the lower holder  114  can be locked by, for example, screwing the locking member  118  into the threaded holes of the upper holder  112  and the lower holder  114 . That is to say, the tightness of the holder body  110  for clamping the encapsulated semiconductor device  10  can be controlled by the locking member  118 , so as to hold the encapsulated semiconductor device  10  in place. In other embodiments, the upper holder  112  and the lower holder  114  can be connected by an elastic piece, so as to clamp the encapsulated semiconductor device  10  in place. 
     Then, performing step S 150 , the positioning mechanism  130  may be removed. In some embodiments, the positioning mechanism  130  may be removed from the holder body by, for example, unscrewing the positioning rods  132  of the positioning mechanism  130  from the positioning holes  1161  of the holder body. In the embodiments of the testing apparatus  100  having the supporter  120 , the supporter  120  may also be removed by, for example, disengaging the supporter  120  from the lower holder  114 . 
     Then, performing step S 160 , a predetermined force may be applied to a part of the encapsulated semiconductor device  10  by a force applying bar  140  to test the bonding strength of the encapsulated semiconductor device  10 . In some embodiments, the force may be applied to an interface between two bonding components of the encapsulated semiconductor device  10  by the force applying bar  140 . For example, the predetermined force may be applied at the interface between the encapsulating material  12  and the semiconductor device  11  or the interface between the encapsulating material  12  and the through vias  13 . Accordingly, the bonding strength between the encapsulating material  12  and the semiconductor device  11  and the bonding strength between the encapsulating material  12  and the through vias  13  can be tested and measured. With the application of the alignment holder  105 , the alignment holder  105  can be well controlled to hold the encapsulated semiconductor device  10  and expose the interface to be tested, so the force can be applied to the interface of the encapsulated semiconductor device  10  precisely without shifting. Accordingly, the positioning and the alignment of the encapsulated semiconductor device  10  can be well controlled by the upper holder  112 , the lower holder  114  and the positioning mechanism  130 , and manual error and false test result caused by shift or misalignment of the encapsulated semiconductor device  10  can be avoided. 
     Then, performing step S 160 , if the encapsulated semiconductor device  10  is failed by the predetermined force applied by the force applying bar  140 , a process parameter of the semiconductor process is modified to form a modified encapsulated semiconductor device  10   a . In some embodiments, if the bonding strength between the interfaces of the encapsulated semiconductor device  10  does not meet the requirement, when the predetermined force is applied onto the encapsulated semiconductor device  10  by the force applying bar  140 , the encapsulated semiconductor device  10  may fail (e.g. crack, or deform, etc.) around the interfaces. As such, process parameters of the semiconductor process for forming the encapsulated semiconductor device  10  may be modified to form the modified encapsulated semiconductor device  10   a . For example, process parameters may include curing temperature of the encapsulating material  12 , reactant concentrations of plating process for forming the conductive pillars  13  and/or conductors of the semiconductor device  11 , etc. The testing process may be repeated until the bonding strength of the modified encapsulated semiconductor device meets the requirement, and then sequential process (e.g. forming a redistribution structure  20  over the modified encapsulated semiconductor device  10   a , etc.) may be performed on the modified encapsulated semiconductor device to form the semiconductor package  50 . Certainly, if the bonding strength of the encapsulated semiconductor device  10  meets the requirement in the first place, the sequential process (e.g. forming a redistribution structure  20  over the encapsulated semiconductor device  10 , etc.) may be performed on the encapsulated semiconductor device  10  to form the semiconductor package  50  without modifying any process parameters. 
     In some embodiments, for the sequential process, the redistribution structure  20  may be formed over the encapsulating material  12  and the semiconductor device  11  and electrically connected to the semiconductor device  11  and the through vias  13  of the encapsulated semiconductor device  10 / 10   a . The redistribution structure  140  may be formed by, for example, depositing conductive layers, patterning the conductive layers to form redistribution circuits  21 , partially covering the redistribution circuits  21  and filling the gaps between the redistribution circuits  21  with dielectric layers  22 , etc. The material of the redistribution circuits  21  may include a metal or a metal alloy including aluminum, copper, tungsten, and/or alloys thereof. The dielectric layers  22  may be formed of dielectric materials such as oxides, nitrides, carbides, carbon nitrides, combinations thereof, and/or multi-layers thereof. The redistribution circuits  21  are formed in the dielectric layers  22  and electrically connected to the semiconductor device  11  and the through vias  13 . In addition, an Under Bump Metallurgy (UBM) layer  23  may be formed on the redistribution structure  20  by sputtering, evaporation, or electroless plating, etc. 
     Then, a plurality of electrical connectors  30  and at least one Integrated Passive Device (IPD)  32  are disposed on the redistribution structure  20  in accordance with some exemplary embodiments. The formation of the electrical connectors  30  may include placing solder balls on the UBM layer  23  (or on the redistribution structure  20 ), and then reflowing the solder balls. In alternative embodiments, the formation of the electrical connectors  30  may include performing a plating process to form solder regions on the UBM layer  23  (or on the redistribution structure  20 ), and then reflowing the solder regions. The electrical connectors  30  may also include conductive pillars, or conductive pillars with solder caps, which may also be formed through plating. The IPD  32  may be fabricated using standard wafer fabrication technologies such as thin film and photolithography processing, and may be mounted on the redistribution structure  20  through, for example, flip-chip bonding or wire bonding, etc. 
     In accordance with some embodiments of the disclosure, the method and the testing apparatus for testing the bonding strength of the encapsulated semiconductor device  10  can be applied once the encapsulating material  12  is formed (i.e. molding process). In other words, the delamination durability of the encapsulated semiconductor device  10  can be obtained once the molding process is performed instead of waiting until the whole semiconductor package process is finished. That is to say, the testing method and the testing apparatus can be applied to the encapsulated semiconductor device  10  instead of being applied to the semiconductor package, which may include the encapsulated semiconductor device, and redistribution structure, etc. Thereby, the delamination durability of the encapsulated semiconductor device  10  can be obtained more instantaneously, so as to modify recipe of the encapsulated semiconductor device  10  to prevent the risk of delamination immediately rather than having to wait until the whole semiconductor package process is finished. Therefore, the product cost can be reduced and the process efficiency can be improved. 
     Based on the above discussions, it can be seen that the present disclosure offers various advantages. It is understood, however, that not all advantages are necessarily discussed herein, and other embodiments may offer different advantages, and that no particular advantage is required for all embodiments. 
     In accordance with some embodiments of the disclosure, an alignment holder for holding a composite specimen includes a holder body, a supporter, and a positioning mechanism. The holder body is configured to clamp a first side of the composite specimen. The supporter is detachably connected to a lower part of the holder body for supporting a lower surface of the composite specimen. The positioning mechanism is configured to lean against a second side of the composite specimen and move relatively to the holder body for adjusting a clamping position of the composite specimen clamped by the holder body. 
     In accordance with some embodiments of the disclosure, a testing apparatus for testing a bonding strength of a composite specimen includes a holder body, a positioning mechanism, and a force applying bar. The holder body is configured to clamp a first side of the composite specimen. The positioning mechanism is movably coupled to the holder body, wherein the positioning mechanism is configured to lean against a second side of the composite specimen and move relatively to the holder body for adjusting a clamping position of the composite specimen clamped by the holder body. The force applying bar is configured to apply a force to a part of the composite specimen exposed by the holder body. 
     In accordance with some embodiments of the disclosure, a method for manufacturing a semiconductor package includes the following steps. A semiconductor process is performed to form an encapsulated semiconductor device, wherein the encapsulated semiconductor device comprises an encapsulating material and a semiconductor device encapsulated by the encapsulating material. A testing apparatus including a holder body, a positioning mechanism and a force applying bar is provided. The encapsulated semiconductor device is claimed by the holder body. A clamping position of the encapsulated semiconductor device is adjusted by the positioning mechanism. The positioning mechanism is removed. A predetermined force is applied to a part of the encapsulated semiconductor device exposed by the holder body by the force applying bar. If the encapsulated semiconductor device is failed by the predetermined force, a process parameter of the semiconductor process is modified to form a modified encapsulated semiconductor device. 
     The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.