Photoelectric device package

A photoelectric device package and a detachable package structure are provided. The photoelectric device package includes a bottom-plate, a top-plate, at least one photoelectric device, and at least one light-guiding element. The bottom-plate has a first carrying part and a first substrate part on the first carrying part. The first carrying part has first alignment portions. The first substrate part has second alignment portions. The top-plate has a second carrying part and a second substrate part on the second carrying part. The second carrying part has third alignment portions. The second substrate part has fourth alignment portions. The top-plate and the bottom-plate are assembled by the first and third alignment portions. The first and second substrate parts are positioned by the second and fourth alignment portions. Each photoelectric device is disposed on the first substrate part. Each light-guiding element is disposed between the first and second substrate parts.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefits of Taiwan application serial no. 101113484, filed on Apr. 16, 2012 and Taiwan application serial no. 101122837, filed on Jun. 26, 2012. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a package and a package structure. More particularly, the invention relates to a photoelectric device package and a detachable package structure.

2. Description of Related Art

To enhance the endurance of electronic products and adapt the electronic products to different environments, dies or electronic devices are often enclosed by a package structure, so as to block external moisture or air. In addition, a package structure may also protect other types of products as well as improve their reliability and endurance.

With the flourishing development of photoelectric products, mature semiconductor manufacturing techniques have been applied to various photoelectric devices, so as to ensure microminiaturization and multi-functionality of these devices. The photoelectric devices made by conducting the semiconductor manufacturing techniques are applicable to optical high definition multimedia interfaces (HDMI), active optical cables/AOC transceivers, or other photoelectric conversion elements.

The way to package the photoelectric devices is one of the key factors that may affect the photoelectric devices, the yield thereof, and the package costs. To allow light to be transmitted between a light-guiding element (e.g., an optical fiber) and a light-emitting element (e.g., a laser diode or a light-emitting diode) or between a light-guiding element (e.g., an optical fiber) and a photo-sensitive element (e.g., a photo-diode) in the photoelectric device, the light-guiding element and the light-emitting element/the photo-sensitive element need be accurately aligned for performing subsequent packaging processes. However, the existing photoelectric devices are required to be manually aligned by using special clamping tools under a microscope, which not only raises the costs but also impairs the manufacturing reliability.

SUMMARY OF THE INVENTION

The invention is directed to a photoelectric device package and a detachable package structure, and the photoelectric device package with a dual alignment mechanism is able to achieve precise alignment, thus simplifying the packaging process of the photoelectric device. The detachable package structure may be easily disassembled, and thereby defective or dysfunctional elements of the package structure may be replaced.

In an embodiment of the invention, a photoelectric device package that includes a bottom-plate, a top-plate, at least one photoelectric device, and at least one light-guiding element is provided. The bottom-plate has a first carrying part and a first substrate part. The first carrying part has a plurality of first alignment portions. The first substrate part is disposed on the first carrying part and has a plurality of second alignment portions. The top-plate has a second carrying part and a second substrate part. The second carrying part has a plurality of third alignment portions. The top-plate and the bottom-plate are assembled by the first alignment portions and the third alignment portions. The second substrate part is disposed on the second carrying part and has a plurality of fourth alignment portions. The first substrate part and the second substrate part are positioned by the second alignment portions and the fourth alignment portions. The photoelectric device is disposed on the first substrate part and located between the first substrate part and the second substrate part. Here, the photoelectric device serves to emit or receive an optical signal. The light-guiding element is disposed between the first substrate part and the second substrate part, and the light-guiding element serves to transmit the optical signal.

In an embodiment of the invention, a detachable package structure that includes an assembly substrate, a first semiconductor substrate, a second semiconductor substrate, and a combination element is provided. The first semiconductor substrate is disposed on the assembly substrate and has a first alignment portion. The second semiconductor substrate has a second alignment portion. The combination element allows the first semiconductor substrate and the second semiconductor substrate to be detachably combined together, such that the first alignment portion and the second alignment portion are aligned and combined.

In an embodiment of the invention, a detachable package structure that includes a first substrate, a photoelectric conversion unit, a second substrate, an optical unit, and a combination element is provided. The photoelectric conversion unit is disposed on the first substrate and includes at least one of a light-emitting element and a photo-sensitive element. The optical unit is disposed between the first substrate and the second substrate and optically coupled to the photoelectric conversion unit. The combination element allows the first substrate and the second substrate to be detachably combined, so as to fix a relative position of the photoelectric conversion unit and the optical unit.

In view of the above, the top-plate and the bottom-plate of the photoelectric device package described in an embodiment of the invention are assembled by the third alignment portions of the second carrying part and the first alignment portions of the first carrying part, and the first substrate part and the second substrate part are precisely positioned by the fourth alignment portions of the second substrate part and the second alignment portions of the first substrate part. During the process, no additional element is required for alignment, and the reliability of the process may be improved. Besides, in the detachable package structure described in an embodiment of the invention, the combination element allows the first semiconductor substrate and the second semiconductor substrate to be detachably combined, and the first alignment portion and the second alignment portion are allowed to be aligned and combined. Hence, the detachable package structure described herein may be easily disassembled, so as to replace defective or dysfunctional elements in the package structure. Moreover, the combination element described in an embodiment of the invention allows the first substrate and the second substrate to be detachably combined, such that the relative position of the photoelectric conversion unit and the optical unit may be fixed. Due to the detachability of the detachable package structure, the photoelectric conversion unit and the optical unit in the package structure may be positioned, and the detachable package structure may be easily disassembled, so as to replace defective or dysfunctional elements in the package structure.

DESCRIPTION OF EMBODIMENTS

FIG. 1Ais a schematic exploded side view illustrating a photoelectric device package according to an embodiment of the invention. With reference toFIG. 1A, the photoelectric device package100described in this embodiment includes a bottom-plate110, a top-plate120, at least one photoelectric device130, and at least one light-guiding element140. The bottom-plate110includes a first carrying part112and a first substrate part114. The first carrying part112has a plurality of first alignment portions112a. The first substrate part114has a plurality of second alignment portions114a. The top-plate120has a second carrying part122and a second substrate part124. The second carrying part122has a plurality of third alignment portions122a. The second substrate part124has a plurality of fourth alignment portions124a.

The photoelectric device130is disposed on the first substrate part114and located between the first substrate part114and the second substrate part124. Here, the photoelectric device130serves to emit or receive an optical signal. Each light-guiding element140is disposed between the first substrate part114and the second substrate part124and serves to transmit the optical signal. In this embodiment, the second substrate part124has a plurality of grooves124b. The light-guiding element140is disposed in the groove124b. The light-guiding element140may be an optical fiber and may be fixed into the groove124bby an ultraviolet adhesive or a thermal-curing adhesive. The first substrate part114has a recession114b, and the photoelectric device130is disposed on a bottom surface of the recession114b. The second substrate part124has a reflective surface124cfor reflecting the optical signal from the photoelectric device130or from the light-guiding element140.

FIG. 1Bis a schematic side view illustrating that the top-plate and the bottom-plate in the photoelectric device package depicted inFIG. 1Aare not assembled yet. With reference toFIG. 1B, the first substrate part114is disposed on the first carrying part112. In this embodiment, the first substrate part114is precisely placed on the first carrying part112by a die-attach machine, and an alignment error between the first carrying part112and the first substrate part114is approximately ±15 micrometers. In addition, the first substrate part114may be a silicon substrate, and the second alignment portions114aand the recession114bmay be formed on the silicon substrate by performing a standard silicon etching process. The first carrying part112may be a printed circuit board (PCB), a metal core printed circuit board (MCPCB), a ceramic circuit board, and so forth; however, the types of the first substrate part114and the first carrying part112are not limited thereto.

The second substrate part124is disposed on the second carrying part122. The fourth alignment portions124aof the second substrate part124may be formed by silicon etching or plastic injection molding, and the shape of the second carrying part122may correspond to the shape of the second substrate part124through injection molding. Thereby, the second substrate part124may be aligned to the second carrying part122and may be fixed into the second carrying part122through silver paste adhesion. Here, an alignment error between the second carrying part122and the second substrate part124is approximately +5 micrometers.

In this embodiment, the photoelectric device package100is assembled through the dual alignment mechanism, so as to simplify the packaging process of a conventional photoelectric device package which requires external equipment, and the highly precise packaging requirement may be satisfied in this embodiment. When the photoelectric device package100is to be assembled, as shown inFIG. 1B, the third alignment portions122aof the second carrying part122may be aligned to the first alignment portions112aof the first carrying part112, so as to assemble the top-plate120and the bottom-plate110. Here, an alignment error between the first carrying part112and the second carrying part122is approximately ±50 micrometers.

The fourth alignment portions124aof the second substrate part124are then aligned to the second alignment portions114aof the first substrate part114, so as to position the first substrate part114and the second substrate part124. In this embodiment, an alignment error between the first substrate part114and the second substrate part124is approximately ±5 micrometers. Note that the alignment error between the first carrying part112and the second carrying part122is greater than the alignment error between the first substrate part114and the second substrate part124according to this embodiment. In the photoelectric device package100described herein, the first and third alignment portions112aand122aare roughly positioned first, and the second and fourth alignment portions114aand124aare then accurately positioned.

FIG. 1Cis a schematic side view illustrating the photoelectric device package depicted inFIG. 1A. With reference toFIG. 1C, the second carrying part122and the second substrate part124may then be fixed to the first carrying part112and the first substrate part114, so as to complete the highly precise packaging process of the photoelectric device package. In this embodiment, the first alignment portions112aare alignment holes, and the third alignment portions122aare alignment pins. Besides, the second alignment portions114aare alignment indentations and the fourth alignment portions124aare alignment protrusions. Nonetheless, as long as the first and third alignment portions112aand122amay be matched, and the second and fourth alignment portions114aand124amay be matched, the types of the first, second, third, and fourth alignment portions112a,114a,122a, and124aare not limited to the above. During the entire assembly process, the top-plate120and the bottom-plate110of the photoelectric device package100described herein may be accurately aligned in no need of any additional equipment (e.g., a die-attach machine).

FIG. 2is a schematic exploded side view illustrating a photoelectric device package according to another embodiment of the invention. With reference toFIG. 2, the difference between the photoelectric device package200described in this embodiment and the photoelectric device package100depicted inFIG. 1Clies in that the second alignment portions214aof the photoelectric device package200depicted inFIG. 2are alignment protrusions, and the fourth alignment portions224aare alignment indentations. The first substrate part214and the second substrate part224are positioned by the alignment protrusions and the alignment indentations. Certainly, the types of the second alignment portions214aand the fourth alignment portions224aare not limited to the above.

FIG. 3is a schematic view illustrating a photoelectric device package according to another embodiment of the invention. With reference toFIG. 3, the difference between the photoelectric device package300described in this embodiment and the photoelectric device package100depicted inFIG. 1Clies in that the photoelectric device package300depicted inFIG. 3further includes an optical adhesive370that fills a space between the first substrate part314and the second substrate part324to encapsulate the photoelectric device330. The reflective index of the optical adhesive370is greater than the reflective index of air; hence, when light is emitted from the optical adhesive370, the light may be converged to improve the coupling efficiency. In this embodiment, the optical adhesive370may be an ultraviolet adhesive or a thermal-curing adhesive. However, the types and the ingredients of the optical adhesive370are not limited herein.

FIG. 4is a schematic view illustrating a photoelectric device package according to another embodiment of the invention. With reference toFIG. 4, the difference between the photoelectric device package400described in this embodiment and the photoelectric device package100depicted inFIG. 1Clies in that the second substrate part424and the second carrying part422of the photoelectric device package400depicted inFIG. 4are integrally formed. Hence, in this embodiment, there is no alignment error between the second substrate part424and the second carrying part422. The alignment error of the photoelectric device package400merely exists between the first carrying part412and the second carrying part422(approximately ±50 micrometers), between the first substrate part414and the first supporting portion412(approximately ±15 micrometers), and between the first substrate part414and the second substrate part424(approximately ±5 micrometers).

FIG. 5Ais a schematic view illustrating a photoelectric device package according to another embodiment of the invention.FIG. 5Bis a schematic view illustrating the first substrate part in the photoelectric device package depicted inFIG. 5A. With reference toFIG. 5AandFIG. 5B, the photoelectric device530described in this embodiment includes a light-emitting element532and a photo-sensitive element534, and the photoelectric device530may be die-attached to the first substrate part514. The light-emitting element532may be vertical cavity surface emitting laser (VCSEL) for transmitting an optical signal to the light-guiding element540. The photo-sensitive element534may be a photo-diode for receiving the optical signal from the light-guiding element540. Certainly, the types and the configuration of the light-emitting element532and the photo-sensitive element534are not limited to the above.

FIG. 5Cis a schematic view illustrating the bottom-plate in the photoelectric device package depicted inFIG. 5A.FIG. 5Dis a schematic cross-sectional view illustrating the bottom-plate depicted inFIG. 5Calong a line segment A-A′. With reference toFIG. 5CandFIG. 5D, the first carrying part512of the bottom-plate510has a first surface512band a second surface512dopposite to the first surface512b. The first surface512bhas a plurality of first pads512cand third pads512fthereon, the second surface512dhas a plurality of second pads512e, and the first pads512cand the second pads512eare electrically connected through through-silicon via (TSV). In this embodiment, the light-emitting element532and the photo-sensitive element534are connected to the third pads512fof the first surface512bthrough wire bonding, and the third pads512fare connected to the first pads512c. Driver dies560are connected to the first pads512cof the first surface512bthrough solder balls. The light-emitting element532and the photo-sensitive element534are electrically connected to the driver dies560configured on the first surface512bof the first carrying part512through the third pads512fand the first pads512c. Besides, the light-emitting element532and the photo-sensitive element534are electrically connected to the solder balls of the second pads512eon the second surface512dthrough the TSVs and the second pads512e.

The main difference between the photoelectric device package500depicted inFIG. 5Aand the photoelectric device package100depicted inFIG. 1Clies in that the photoelectric device package500depicted inFIG. 5Afurther includes an adapting element580that is connected to the light-guiding element540. Here, the adapting element580may be a mechanic adapting ferrule, the second carrying part522carries the adapting element580, and the adapting element580is not covered by the first carrying part512. The second carrying part522further has a plurality of positioning portions522dthat are alignment pins, for instance, and the positioning portions522dare not covered by the first carrying part512and are suitable for being fixed onto a third carrying part590. The second carrying part522may be aligned to the third carrying part590through the positioning portions522d. As shown inFIG. 5AandFIG. 5C, the positioning portions522dare located on the second carrying part522relatively away from the driver dies560on the first carrying part512; thereby, the positioning portions522dwill not affect the high-frequency circuits close to the driver dies560on the first carrying part512, and thus circuit abnormality may not occur.

FIG. 5Eis a schematic view illustrating that the bottom-plate in the photoelectric device package depicted inFIG. 5Ahas an adapting element.FIG. 5Fis a schematic view illustrating a fastener in the photoelectric device package depicted inFIG. 5A.FIG. 5Gis a schematic side view illustrating that the photoelectric device package depicted inFIG. 5Ahas a fastener. Another difference between the photoelectric device package500depicted inFIG. 5Aand the photoelectric device package100depicted inFIG. 1Clies in that the photoelectric device package500further includes a fastener592that is fastened to the second carrying part522, as shown inFIG. 5F. Here, the second carrying part522has at least one first mortise tenon joint522e, and the fastener592has a second mortise tenon joint594. The fastener592is fastened to the second carrying part522through the first mortise tenon joint522eand the second mortise tenon joint594, as shown inFIG. 5G.

FIG. 6Ais a schematic view illustrating a photoelectric device package according to another embodiment of the invention.FIG. 6Bis a schematic view illustrating the bottom-plate in the photoelectric device package depicted inFIG. 6A.FIG. 6Cis a schematic view illustrating the top-plate in the photoelectric device package depicted inFIG. 6A. With reference toFIG. 6AtoFIG. 6C, the main difference between the photoelectric device package600described herein and the photoelectric device package500lies in that the light-guiding element640of the photoelectric device package600depicted inFIG. 6Aextends from a space between the first substrate part614and the second substrate part624to a region outside the second carrying part622, and the adapting element680is not covered by the first carrying part612.

FIG. 7Ais a top view illustrating a detachable package structure according to an embodiment of the invention.FIG. 7Bis a three-dimensional exploded view illustrating the detachable package structure depicted inFIG. 7A.FIG. 7CandFIG. 7Dare exploded side views illustrating the detachable package structure depicted inFIG. 7Aat two different viewing angles.FIG. 8is a schematic view illustrating the detachable package structure depicted inFIG. 7A.FIG. 9Ais an exploded view illustrating the first substrate, the second substrate, and their alignment portions depicted inFIG. 7A.FIG. 9Bis a three-dimensional view illustrating the first substrate, the second substrate, and their alignment portions depicted inFIG. 7A. Here,FIG. 8is a schematic view illustrating the detachable package structure depicted inFIG. 7A; therefore, relative positions of elements depicted inFIG. 8in a three-dimensional space may be referred to as those illustrated inFIG. 7AtoFIG. 7D,FIG. 9A, andFIG. 9B. As shown inFIG. 7AtoFIG. 7D,FIG. 8,FIG. 9A, andFIG. 9B, the detachable package structure1100includes a first substrate1110, a second substrate1140, and a combination element1150. In this embodiment, the detachable package structure1110further includes an assembly substrate1180on which the first substrate1110is disposed. The first substrate1110may have at least one first alignment portion1112, and the second substrate1140may have at least one second alignment portion1142. InFIG. 9A, plural first alignment portions1112are exemplarily shown. According to this embodiment, the first substrate1110and the second substrate1140are both semiconductor substrates, e.g., silicon substrates, the first alignment portions1112may be recessions, and the second alignment portions1142may be protrusions. However, in another embodiment of the invention, the first alignment portions1112may be protrusions, and the second alignment portions1142may be recessions. In this embodiment, the first alignment portions1112and the second alignment portions1142may be formed by performing a silicon etching process. However, in other embodiments of the invention, the first substrate1110and the second substrate1140may be made of other semiconductors, and the first alignment portions1112and the second alignment portions1142may be formed by performing other semiconductor processes. The combination element1150described herein allows the first substrate1110and the second substrate1140to be detachably combined together, such that the first alignment portions1112and the second alignment portions1142may be aligned and combined (e.g., the first alignment portions1112may be inserted in the second alignment portions1142). For instance, when the first alignment portions1112are recessions, and the second alignment portions1142are protrusions, the second alignment portions1142may be inserted in the first alignment portions1112.

In this embodiment, the detachable package structure1110further includes a photoelectric conversion unit1120and an optical unit1130. The photoelectric conversion unit1120is disposed on the first substrate1110and includes at least one of a light-emitting element1122and a photo-sensitive element1124. InFIG. 9A, the photoelectric conversion unit1120exemplarily includes both the light-emitting element1122and the photo-sensitive element1124. In this embodiment, the light-emitting element1122is a light-emitting die which may be a laser diode, e.g., a surface emitting laser diode. Besides, the photo-sensitive element1124may be a photo-sensitive die, e.g., a photo-diode. However, in another embodiment of the invention, the light-emitting element122may be a light-emitting diode (LED). Besides, the assembly substrate1180is a circuit board, for instance, and the photoelectric conversion unit1120may be electrically connected to the assembly substrate1180. Specifically, the photoelectric conversion unit1120may be electrically connected to the driver circuit (e.g., a driver integrated circuit, a driver IC)1190on the assembly substrate1180, and the driver circuit1190is electrically connected to the assembly substrate1180. In this embodiment, the photoelectric conversion unit1120is connected to the driver circuit1190through a connection line1210. However, the photoelectric conversion unit1120in other embodiments may be electrically connected to the driver circuit1190through a circuit on the assembly substrate1180or may be electrically connected to the driver circuit1190in other ways.

The optical unit1130is disposed between the first substrate1110and the second substrate1140and optically coupled to the photoelectric conversion unit1120. The combination element1150allows the first substrate1110and the second substrate1140to be detachably combined, so as to fix a relative position of the photoelectric conversion unit1120and the optical unit1130.

The optical unit1130includes a reflective surface1132and at least one light transmission element1134, and the at least one light transmission element1134refers to plural light transmission elements1134in this embodiment, for instance. The reflective surface1132is located on the second substrate1140. In this embodiment, the reflective surface1132is formed by a reflective coating on the second substrate1140. The reflective coating is a metal coating or a coating made of other materials, and a reflectance of the reflectance coating may be greater than a reflectance of the second substrate1140made of silicon. The light transmission elements1134are optical fibers, for instance. However, in another embodiment, the light transmission elements1134may be wave guides.

Here, the light transmission elements1134are sandwiched between the first substrate1110and the second substrate1140. In particular, when the combination element1150allows the first substrate1110and the second substrate1140to be combined together, the light transmission elements1134are sandwiched by the first substrate1110and the second substrate1140. For instance, as shown inFIG. 9A, the second substrate1140may have a plurality of grooves1144. When the light transmission elements1134are sandwiched by the first substrate1110and the second substrate1140, the light transmission elements1134are held by the grooves1144. In other embodiments, the first substrate1110may have the grooves that may hold the light transmission elements1134, or both the first substrate1110and the second substrate1140have the grooves that may hold the light transmission elements1134.

The light transmission elements1134, the reflective surface1132, and the photoelectric conversion unit1120are located on the same light path. According to this embodiment, the reflective surface1132reflects the light emitted from the light-emitting element1122to some of the light transmission elements1134(i.e., several of the light transmission elements1134), while the reflective surface1132reflects the light1135emitted from the other light transmission elements1134to the photo-sensitive element1124.

In this embodiment, the detachable package structure1110further includes a first positioning element1160and a second positioning element1170. The first positioning element1160is disposed on the assembly substrate1180and has at least one third alignment portion1162. The second positioning element1170has at least one fourth alignment portion1172. InFIG. 7A, the first positioning element1160exemplarily has a plurality of third alignment portions1162, and the second positioning element1170exemplarily has a plurality of fourth alignment portions1172. The fourth alignment portions1172and the third alignment portions1162are aligned and combined. Here, the fourth alignment portions1172are protrusions, for instance, and the third alignment portions1162are recessions, for instance. However, in another embodiment of the invention, the fourth alignment portions1172may be recessions, and the third alignment portions1162may be protrusions. Besides, the fourth alignment portions1172may be combined with (e.g., may be inserted in) the third alignment portions1162. The second substrate1140is disposed on the second positioning element1170and located between the second positioning element1170and the first substrate1110. In this embodiment, the first positioning element1160and the second positioning element1170are plastic elements formed by injection molding, for instance. Besides, an alignment error between the third alignment portions1162and the fourth alignment portions1172is greater than an alignment error between the first alignment portions1112and the second alignment portions1142. Since the precision degree of the semiconductor process (e.g., the silicon etching process) is greater than that of the injection molding process, the alignment error between the first alignment portions1112and the second alignment portions1142may be relatively insignificant.

In this embodiment, the combination element1150has at least one first locking portion1152, and the first positioning element1160has at least one second locking portion1164. InFIG. 7B, a plurality of first locking portions1152and a plurality of second locking portions1164are shown. The combination element1150locks the second locking portions1164through the first locking portions1152, such that the second positioning element1170and the first positioning element1160may be detachably combined, and that the second substrate1140and the first substrate1110may be detachably combined. Namely, the combination element1150is a locking element. When the combination element1150locks the first positioning element1160, the top1154of the combination element1150presses the second positioning element1170. Thereby, the second positioning element1170presses the first positioning element1160and the second substrate1140, and the second substrate1140then presses the first substrate1110. Due to the clamping force between the first substrate1110and the second substrate1140, the light transmission elements1134may be fixed at proper positions. According to this embodiment, the first locking portions1152are recessions or through holes, and the second locking portions1164are protrusions, for instance. Nonetheless, in another embodiment of the invention, the first locking portions1152may be protrusions, and the second locking portions1164may be recessions or through holes.

FIG. 10AandFIG. 10Billustrate a process of assembling the detachable package structure depicted inFIG. 8. The assembly process of the detachable package structure1100is described below. With reference toFIG. 10A, the first positioning element1160is fixed onto the assembly substrate1180. For instance, the first positioning element1160is attached to the assembly substrate1180through using an adhesive, using an adhesive tape, or performing a die-attaching process. The fourth alignment portions1172are then aligned to the third alignment portions1162, and the fourth alignment portions1172and the third alignment portions1162are locked together, as shown inFIG. 10B. When the fourth alignment portions1172and the third alignment portions1162are locked together, the first substrate1110and the second substrate1140may be roughly positioned. The first alignment portions1112and the second alignment portions1142may respectively have the tapered surfaces1113and the tapered surfaces1143. Hence, when the fourth alignment portions1172and the third alignment portions1162are locked together, the first alignment portions1112of the first substrate1110and the second alignment portions1142of the second substrate1140may be precisely positioned because the tapered surfaces1143slide relatively to the tapered surfaces1113. For instance, the second alignment portions1142reach the deepest parts of the first alignment portions1112, and thereby the first substrate1110and the second substrate1140may be positioned in a more precise manner. The combination element1150then presses the second positioning element1170from top to bottom. Here, the combination element1150may be elastic; therefore, when the combination element1150then presses the second positioning element1170from top to bottom, the first locking portions1152slide to the positions of the second locking portions1164and are then locked to the second locking portions1164. Owing to the locking force, the combination element1150is able to fix the second positioning element1170onto the first positioning element1160and fix the second substrate1140onto the first substrate1110. Further, the light transmission elements1134are sandwiched by the second substrate1140and the first substrate1110, so as to complete the packaging process of the detachable package structure1100, as shown inFIG. 8. In this embodiment, the second substrate1140may adhere to the second positioning element1170before the second positioning element1170and the first positioning element1160are assembled. Thereby, when the second positioning element1170is assembled to the first positioning element1160, the second substrate1140may be together assembled to the first substrate1110.

In the detachable package structure described1100in this embodiment, the combination element1150allows the first substrate1110and the second substrate1140to be detachably combined, and the first alignment portions1112and the second alignment portions1142are allowed to be aligned and combined. Hence, the detachable package structure1100described herein may be easily disassembled, so as to replace defective or dysfunctional elements in the package structure. For instance, when the light transmission elements1134are broken in the packaging process, the combination element1150may be pulled in an upward direction and thus may be removed away from the second positioning element1170. The second positioning element1170, together with the second substrate1140, is then pulled in an upward direction (relative to the first substrate1110), so as to remove the broken light transmission elements1134and replace the broken ones with new ones. The packaging process is then again performed by sequentially implementing the steps shown inFIG. 10A,FIG. 10B, andFIG. 8. Even though the light transmission elements1134are found to be broken after the packaging process is completed, it is not necessary to discard the entire detachable package structure1100, nor is it necessary to separate the second substrate1140from the first substrate1110through performing a complicated, expensive, and difficult process. Similarly, if the second substrate1140, the second positioning element1170, or the reflective surface1132is found to be defective or damaged after the packaging process is completed, the combination element1150may be removed to replace the second substrate1140and the second positioning element1170. The costly elements, such as the photoelectric conversion unit1120and the driver circuit1190, are disposed on the first substrate1110and the assembly substrate1180, while there is no expensive element on the second substrate1140and the second positioning element1170. Hence, the costs of the detachable package structure1100may be lowered down by replacing the second substrate1140and the second positioning element1170but maintaining the first substrate1110and the assembly substrate1180.

Moreover, in the detachable package structure1100described in this embodiment, the fourth and third alignment portions1172and1162may be combined and roughly positioned, and the second and first alignment portions1142and1112may be precisely positioned. Therefore, the detachable package structure1100described herein may achieve the highly precise alignment between the first and second substrates1110and1140through passive alignment (also referred to as self alignment); furthermore, the highly precise alignment among the light transmission elements1134, the reflective surface1132, and the photoelectric conversion unit1120may be accomplished. As such, manually operating special clamping tools under a microscope for alignment is not necessary for the detachable package structure1100described in this embodiment; consequently, the use of the detachable package structure1100may reduce the manufacturing time, lower down the manufacturing costs, and improve the manufacturing reliability.

In the detachable package structure1100of this embodiment, the light-emitting element1122may serve as an optical signal emitter, and the photo-sensitive element1124may act as an optical signal receiver. The optical signal emitted by the light-emitting element1122may be transmitted to the external surroundings (e.g., to an external light transceiver) sequentially via the reflective surface1132and the light transmission elements1134, and the optical signal from the external surroundings (e.g., from an external light transceiver) may be transmitted to the photo-sensitive element1124sequentially via the light transmission elements1134and the reflective surface1132and is then sensed by the photo-sensitive element1124. Hence, the detachable package structure1100may act as an optical signal transceiver (i.e., a photoelectric conversion element) applicable to the field of light communication or may act as a microminiaturized package structure of a micro-electromechanical system (MEMS). For instance, the detachable package structure may be employed to an optical high definition multimedia interface (HDMI), Thunderbolt, a Light Peak connector, an active optical cable/an AOC transceiver, or the like.

According to this embodiment, the first substrate1110and the assembly substrate1180are individually formed, and so are the first positioning element1160and the assembly substrate1180, the second substrate1140and the second positioning element1170, and the combination element1150and the second positioning element1170. Nevertheless, in other embodiments of the invention, the first substrate1110and the assembly substrate1180may be integrally formed, the first positioning element1160and the assembly substrate1180may be integrally formed (i.e., the first positioning element1160is a protrusion structure on the assembly substrate1180), the second substrate1140and the second positioning element1170may be integrally formed, or the combination element1150and the second positioning element1170may be integrally formed. Alternatively, the second substrate1140, the second positioning element1170, and the combination element1150may be integrally formed.

FIG. 11is a schematic view illustrating a detachable package structure according to another embodiment of the invention. With reference toFIG. 11, the detachable package structure1100adescribed in this embodiment is similar to the detachable package structure1100depicted inFIG. 8, while the dissimilarities are described below. In the detachable package structure1110adescribed in this embodiment, the combination element1150aand the second positioning element1170aare detachably combined. Particularly, according to this embodiment, the second positioning element1170ahas a third surface S3and a fourth surface S4opposite to the third surface S3, and the second substrate1140is disposed between the fourth surface S4and the first substrate1110. Besides, the combination element1150ais a locking hook, and the locking hook extends from the first positioning element1160ato the third surface S3and locks the third surface S3, such that the second positioning element1170aand the first positioning element1160aare detachably combined. According to this embodiment, the combination element1150aand the first positioning element1160aare integrally formed. However, in other embodiments of the invention, the combination element1150amay be inserted into or simply attached to the first positioning element1160a. The third alignment portion1162aof the first positioning element1160amay be a bar-shaped indentation (exemplarily extending in a direction perpendicular to the direction of the drawings), and the fourth alignment portion1172arefers to an edge of the second positioning element1170a. When the first positioning element1160aand the second positioning element1170aare combined, the fourth alignment portion1172ais placed in the third alignment portion1162a.

According to this embodiment, the first positioning element1160ahas a first joint portion1166a, the assembly substrate1180ahas a second joint portion1182a, and the first joint portion1166aand the second joint portion1182aare jointed. Here, the first joint portion1166ais a protrusion, and the second joint portion1182ais a recession. However, in another embodiment of the invention, the first joint portion1166amay be a recession, and the second joint portion1182amay be a protrusion. Besides, the first joint portion1166aand the second joint portion1182amay be jointed through using an adhesive, using an adhesive tape, or performing a die-attaching process.

The first positioning element1160aand the combination element1150amay be slightly elastic; therefore, during the packaging process of the detachable package structure1100, the second positioning element1170aand the second substrate1140may be pressed down, such that the edge (e.g., the fourth alignment portion1172a) of the second positioning element1170aslides toward the first positioning element1160aalong a guiding surface1156a(i.e., the tapered surface) of the combination element1150a. At this time, the edge of the second positioning element1170apasses through and pushes against the guiding surface1156aand thus pushes the combination element1150ato respective sides. When the second positioning element1170ais continuously pressed down to combine the fourth alignment portion1172aand the third alignment portion1162a, the combination element1150ais bounced back from the respective sides and locks the third surface S3. Thereby, the packaging process of the detachable package structure1100may be completed. When it is intended to remove the second positioning element1170a, the combination element1150amay be pushed toward respective sides to separate the second positioning element1170afrom the first positioning element1160a. According to another embodiment, the combination element1150a, the first positioning element1160a, and the assembly substrate1180amay be integrally formed.

FIG. 12is a schematic view illustrating a detachable package structure according to yet another embodiment of the invention. With reference toFIG. 12, the detachable package structure1100bdescribed in this embodiment is similar to the detachable package structure1100depicted inFIG. 8, while the dissimilarities are described below. In the detachable package structure1110bdescribed in this embodiment, the combination element1150bhas a press portion1154band a locking hooking portion1158bconnected to the press portion1154b. The assembly substrate1180has a first surface S1and a second surface S2opposite to the first surface S1. The first substrate1110is disposed on the first surface S1, and the second positioning element1170is disposed between the press portion1154band the first surface S1. The locking hook portion1158blocks the second surface S2of the assembly substrate1180, such that the press portion1154bpresses the second positioning element1170. During the packaging process of the detachable package structure1100bdescribed in this embodiment, the combination element1150bis pressed down toward the second positioning element1170. At this time, the guiding surface1159b(e.g., a tapered surface) of the locking hook portion1158bis pushed by the edge of the second positioning element1170. Hence, when the combination element1150bcontinues to be pressed down, the locking hook portion1158bmay be continuously moved downward to lock the second surface S2. When it is intended to remove the combination element1150b, the locking hook portion1158bmay be pushed toward respective sides, and the combination element1150bis lifted up and removed. Here, the combination element1150blocks the second surface S2through the locking hook portion1158b, and the combination element1150bneed not be locked to the first positioning element1160b.

To sum up, the photoelectric device package described in an embodiment of the invention may be a microminiaturized package structure applicable to an optical HDMI, an active optical cable/an AOC transceiver, or any other photoelectric conversion element. The top-plate and the bottom-plate of the photoelectric device package are assembled by the third alignment portions of the second carrying part and the first alignment portions of the first carrying part, and the first substrate part and the second substrate part are precisely positioned by the fourth alignment portions of the second substrate part and the second alignment portions of the first substrate part. Due to the dual alignment mechanism of the photoelectric device package as described herein, the top-plate and the bottom-plate may be accurately aligned in no need of any additional equipment, and thus the packaging process of the photoelectric device may be simplified.

In the detachable package structure described in an embodiment of the invention, the combination element allows the first semiconductor substrate and the second semiconductor substrate to be detachably combined, and the first alignment portion and the second alignment portion are allowed to be aligned and combined. Hence, the detachable package structure described herein may be easily disassembled, so as to replace defective or dysfunctional elements in the package structure. Besides, the combination element described in an embodiment of the invention allows the first substrate and the second substrate to be detachably combined, such that the relative position of the photoelectric conversion unit and the optical unit may be fixed. Due to the detachability of the detachable package structure, the photoelectric conversion unit and the optical unit in the package structure may be positioned, and the detachable package structure may be easily disassembled, so as to replace defective or dysfunctional elements in the package structure.

Moreover, in the detachable package structure described in an embodiment of the invention, the fourth and third alignment portions may be combined and roughly positioned, and the second and first alignment portions may be precisely positioned. Hence, the detachable package structure described herein may achieve the highly precise alignment between the first and second substrates through passive alignment (also referred to as self alignment); furthermore, the highly precise alignment among the light transmission element, the reflective surface, and the photoelectric conversion unit may be accomplished. As such, manually operating special clamping tools under a microscope for alignment is not necessary for the detachable package structure described herein. Consequently, the use of the detachable package structure described herein may reduce the manufacturing time, lower down the manufacturing costs, and improve the manufacturing reliability.