KR101436233B1 - The Receptacle of Optical Interconnection Module - Google Patents

Abstract

The present invention relates to an optoelectronic interconnection module for high-speed transfer of large-capacity data between boards in a device, and more particularly, to an optical interconnection module having a horizontal alignment structure for optical direct connection (butt-coupling) and passive-alignment (e.g. VCSEL PKG, PD PKG) based photoelectric module.
To this end, the present invention provides a receptacle of a photoelectric wiring module, comprising: an insulator mounted on a board; And an electrical lead mounted on the insulator, wherein the electrical lead is protruded upward from the insulator and is electrically connected to an electrical pad formed on a lower surface of a substrate of a plug of the photoelectric interconnection module, And the central portion has elasticity in an upward direction.

Description

The Receptacle of Optical Interconnection Module < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optoelectric wiring module, and more particularly, to an optoelectric wiring module for transferring large capacity data between boards in a device.

More particularly, the present invention relates to a photoelectric module based on a horizontal alignment structure optical device package (e.g., VCSEL PKG, PD PKG) for butt-coupling and passive-alignment.

Recently, electronic devices (smart phones, smart TVs, computers, tablet PCs, displays, digital cameras, camcorders, MP3s, game devices, navigation systems, etc.) It is progressing.

Recent trends in electronic devices require high-speed, high-speed data transmission technologies such as high image quality and 3D image content among the devices in the device. This enables signal attenuation, noise, EMI / EMC, impedance matching, cross talk, skew, Has become a big issue.

Generally, copper-based wiring, that is, electrical connectors, is used for data transmission within the device.

However, copper wiring can not meet the high-speed data transmission needs of large capacity, and it does not solve various technical issues that meet the above-mentioned recent electronic device trends.

Recently, optical wiring technology has been researched and developed as a technology to solve this problem. In other words, optical wiring can replace high-capacity data at a high speed by replacing dozens of channels of parallel electrical signal lines with serial optical signal lines, and can solve technical problems such as noise, EMI / EMC, impedance matching, cross talk, skew, Can be solved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of an optical cable module of the prior art used for connection between boards in an apparatus. Fig.

The optical cable module shown in Fig. 1 is disclosed in Japanese Patent No. 4631671 (entitled " Prior Art 1 ") entitled "An optical device having an optical cable module and an optical cable module" The following is an explanation.

The optical cable module shown in Fig. 1 comprises a transmitter 10a and a receiver 10b. The transmitter includes a VCSEL chip 3a, an electrode pad 5a, a bonding wire 7a, a liquid resin 8a, And the height supporting member 4a and the receiving portion is constituted by the PD chip 3b, the electrode pad 5b, the bonding wire 7b, the liquid resin 8b and the height supporting member 4b on the substrate 6b And is composed of an optical waveguide 2 as a connection wiring between a transmitting section and a receiving section.

1, an electric signal (i.e., image data) of a main board connected to a transmitter is transmitted to a VCSEL chip (not shown) through a driver IC (not shown) through an electrode pad 5a on a substrate 6a 3a and is vertically emitted upward from the VCSEL chip 3a and reflected by the 45 ° mirror surface of the end of the optical waveguide 2 to be transmitted to the receiver through the optical waveguide 2. [

The optical signal is vertically reflected in a downward direction through a 45 ° mirror surface at the end of the optical waveguide 2 to be incident on the PD chip 3b on the substrate 6b and is transmitted through the electrode pad 5b on the substrate 6b Is converted into an electric signal from the PD chip 3b through the control of the TIA (not shown) and input to the display board connected to the receiver.

2 is a perspective view of an embodiment of a prior art photoelectric conversion module used for chip-to-chip interconnection in an apparatus.

The photoelectric conversion module shown in Fig. 2 is disclosed in Korean Patent No. 810665 entitled "Photoelectric Conversion Module and Method for Manufacturing the Same" (hereinafter referred to as "Prior Art 2"). same.

The photoelectric conversion module of FIG. 2 includes a transmitter 200 and a receiver 300 on a PCB 500, and an optical waveguide 400 is formed by a connection wiring between a transmitter and a receiver.

The transmitting unit 200 includes an IC substrate 200a, electrode pads 211 and 212 formed on the upper surface of the IC substrate 200a, electrode pads 220 formed on the sides of the IC substrate 200a, And a VCSEL chip 251 bonded to the side surface of the IC substrate 200a through the electrode pad 220. The driver IC 230 is mounted on the upper surface of the IC substrate 200a.

The receiving unit 300 includes an IC substrate 300a, electrode pads 311 and 312 formed on the upper surface of the IC substrate 300a, electrode pads 320 formed on the sides of the IC substrate 300a, A TIA 330 bonded to the upper surface of the IC substrate 300a via the electrode pad 312 and a PD chip 350 bonded to the side surface of the IC substrate 300a through the electrode pad 320. [

3 is a perspective view of one embodiment of a prior art optical connector used for in-board board-to-board connection.

The optical connector shown in Fig. 3 is disclosed in Japanese Patent Application Laid-Open No. 2011-22198 (entitled "Optical Connector") [hereinafter referred to as "Prior Art 3"].

3 includes a receptacle 20 mounted on the board in the apparatus and a plug 30 mating with the receptacle 20. The optical connector shown in FIG.

The receptacle 20 is provided with a protruding electrode pad 24 to which a VCSEL chip 22 and a Driver IC 23 are mounted in the housing 21 and is electrically connected to the copper wiring of the plug 30 And a lead 25 for electrical connection with the board and has a guide portion 26 for holding the position of the plug 30. The plug 30 is closed when the plug 30 is seated, And a fixing portion 27 for locking the fixing portion 30.

The plug 30 is provided with an optical transmission path 31 in which copper wiring and an optical waveguide are laminated and a mirror surface is formed so that the end portion of the optical waveguide of the optical transmission path 31 is inclined at 45 degrees, And a guide portion 33 that is seated on the guide portion 26 of the receptacle 20 in a housing 32 on which the housing 32 is mounted.

However, in the prior art 1, since the VCSEL chip and the optical waveguide are vertically aligned using a 45-degree mirror surface and a height supporting member is used, problems such as a light loss problem, a problem of a distance of optical coupling separation, There is a problem.

In addition, since the sealing liquid resin is used for protecting the VCSEL chip in the prior art 1, the optical waveguide is influenced by the liquid resin expansion, and thus the optical focusing can not be performed properly.

In addition, the conventional art 1 requires a 45-degree optical waveguide fabrication process in the manufacturing process, and since the alignment between the VCSEL chip and the optical waveguide must be finely adjusted by hand, there is a problem that the mass production rate is significantly reduced.

On the other hand, in the prior art 2, since the VCSEL chip is mounted on the side surface of the IC substrate by using the electrode pad and the solder ball, the VCSEL chip can not be fixed and there is a problem of physical instability of the VCSEL chip.

In addition, since the conventional art 2 mounts the optical waveguide on the surface of the VCSEL chip using an adhesive, the physical fixing of the optical waveguide can not be guaranteed, and thus the optical focusing can not be properly performed.

In addition, in the prior art 2, since the VCSEL chip is placed on the side of the IC substrate by using the pick-up equipment in the manufacturing process, the process reliability can not be guaranteed and the mass productivity is significantly reduced.

On the other hand, in the prior art 3, the 45-degree mirror surface of the optical waveguide of the plug 30 is optically aligned so as to be located on the emission surface side of the VCSEL chip 22 of the receptacle 20, Have all problems.

Particularly, in the prior art 3, the optical alignment position is held by using the guide portion 26 of the receptacle 20 and the guide portion 33 of the plug 30. However, the physical connection between the receptacle 20 and the plug 30 There is a problem in that the optical focusing is also turned off even by slight fluctuation. That is, it is very difficult to finely adjust the alignment between the VCSEL chip and the optical waveguide by hand, and it does not guarantee the optical alignment reliability when the optical connector is mounted on an application product.

In addition, the conventional art 3 has a problem that the mass productivity is remarkably deteriorated because the optical waveguide is provided in the plug 30 in a simple form, but the optical waveguide 45 ° processing step is required in the plug manufacturing process.

In order to mount the optical connector of the prior art 3 on the board, the lead 25 of the receptacle 20 is mounted on the electrode pad of the board by a reflow process so that the plug 30 is seated on the receptacle 20 . However, there is a problem that the surface of the emission surface of the VCSEL chip 22 is contaminated by the flux generated in the reflow process of the VCSEL chip 22 of the receptacle 20, thereby deteriorating the light emission function.

Accordingly, the present invention has been made in order to solve the above-mentioned problems and to meet the above-mentioned demand, and it is an object of the present invention to provide a method and apparatus for assuring optical coupling reliability while ensuring low cost, small size (height / area), mass productivity , And to provide a photoelectric wiring module for high-speed transfer of large-capacity data between boards in a device for ensuring physical stability of parts mounting.

That is, the present invention provides a commercially available photoelectric interconnection module that can be universally applied to a board in a device while having a low-cost, high-reliability manufacturing process, and particularly, (e.g., VCSEL PKG, PD PKG) based optoelectronic interconnection module for horizontal alignment of a plurality of photoelectric conversion elements,

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a receptacle for a photoelectric interconnection module, comprising: an insulator mounted on a board; And an electrical lead mounted on the insulator, wherein the electrical lead is protruded upward from the insulator and is electrically connected to an electrical pad formed on a lower surface of a substrate of a plug of the photoelectric interconnection module, And the central portion has elasticity in an upward direction.

On the other hand, the present invention is a plug of a photoelectric wiring module, comprising: a frame; A substrate mounted on the frame; An optical element package for performing photoelectric conversion or electrooptical conversion of a signal; A light control element for controlling driving of the optical device package; And an optical transmission line for transmitting an optical signal emitted from the optical device package or incident on the optical device package, wherein the optical control device is mounted on the substrate, and the optical device package is mounted on the substrate side position And the optical transmission path is mounted on the optical device package.

As described above, the present invention can use the elements and components of the photoelectric wiring module as they are without any additional processing, and is easy to mass-produce with low cost and high reliability, and it is easy to mount such elements and components on a substrate, Can be ensured. That is, the photoelectric interconnection module of the present invention can be mass-produced in the form of individual parts, and can be easily assembled in units of individual parts, thereby enhancing the mass productivity. In addition, the mirror surface processing step of the optical path is not required.

In addition, the present invention is a horizontal alignment structure between an optical device package and an optical transmission line, and can be optically connected directly butt-coupled to an optical device package and an optical path without a separate member such as a lens or a mirror, Passive-alignment can be performed instead of active optical alignment to perform position adjustment while measuring with measurement equipment when optical device package and optical transmission path are combined, ensuring optical coupling reliability and physical stability of parts mounting can do.

In addition, since the present invention has a horizontal alignment structure other than vertical alignment, the optical alignment distance can be minimized and the optical alignment reliability can be improved.

Further, the present invention can be easily applied to an internal board of an applied product, and can ensure performance and reliability, so that the photoelectric wiring module can be commercialized.

Further, since the optical alignment is performed in the optical device package of the plug, the optical connection reliability can be ensured without being affected by the physical tightening instability between the plug and the receptacle.

In addition, since the present invention mounts only the electrical connecting function to the receptacle, the optical device chip is not affected at all when the receptacle is mounted on the board by the reflow process, and only the optical alignment plug is fastened to the receptacle. , Reliability of the manufacturing process can be assured.

In addition, the present invention realizes an electrical connection function by forming an electric pad on the lower surface of a substrate, thereby realizing a photoelectric wiring module in the form of a plug electric connector having a smaller size and a smaller size than other photoelectric wiring modules using a B2B electrical connector .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an optical cable module of the prior art used for connection between boards in a device. FIG.
2 is a perspective view of an embodiment of a prior art photoelectric conversion module used for chip-to-chip interconnection in a device.
3 is a perspective view of one embodiment of a prior art optical connector used for in-board inter-board connection.
4 is an external view of an embodiment of an optoelectric wiring module according to the present invention.
Figure 5 is an external view of an embodiment of the plug of Figure 4;
Figure 6 is a perspective view of an embodiment of the receptacle of Figure 4;
7 is an exploded view of the plug of Fig.
8 is a perspective view for explaining an optical device package according to the present invention.
9 is an assembly view for explaining a manufacturing process of the photoelectric wiring module of the present invention.
10 is a perspective view for explaining a detachment process of a plug and a receptacle of the present invention.
11 is an explanatory diagram showing an apparatus to which an optoelectric wiring module of the present invention is applied.
12 is a cross-sectional view showing an embodiment of the electrical lead of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is an external view of an embodiment of a photoelectric interconnection module according to the present invention, FIG. 5 is an external view of an embodiment of the plug of FIG. 4, FIG. 6 is a perspective view of an embodiment of the receptacle of FIG. Fig. 7 is an exploded view of the plug of Fig. 5, and Fig. 8 is a perspective view for explaining the optical device package of the present invention.

As shown in the figure, the photoelectric interconnection module of the present invention includes a receptacle 70 mounted on an in-device board and a plug 40 mating with the receptacle 70.

The plug 40 includes a frame 41, a substrate 42 mounted in a retractable manner on the frame 41, a light control element 43 mounted on the substrate 42, An optical transmission path 45 inserted and mounted in the optical device package 44, and a shell 46 mounted so as to cover the frame 41. [ An electrical pad 42a is formed under the substrate 42. [

The frame 41 has an inner space and a support upper surface surrounding the inner space and a support bottom surface. Through this structure, the substrate 42 is inserted into the frame 41 in a retractable manner and mounted. One side of the substrate 42 has a protruding end, and one projecting end of the substrate 42 is fitted into the side central groove of the frame 41 and fixed without rocking. A groove is formed in the bottom surface of the frame 41 so that the lower electrical pad 42a of the substrate 42 is opened to the outside in a state that the substrate 42 is mounted. On both outer side surfaces of the frame 41, a locking protrusion 41a is formed in which a groove formed in the pawl 46a of the shell 46 is inserted. The frame 41 may be made of plastic injection molding or the like.

An electrode pad (not shown) for mounting and electrically connecting the light control device 43 and the optical device package 44 is formed on the substrate 42. An electric pad 42a is formed below the substrate 42, Respectively. The electric pad 42a under the substrate 42 is electrically connected to the electrical lead 72 of the receptacle 70 by fastening between the plug 40 and the receptacle 70. [

The optical device package 44 is composed of a housing 61, a lead 62 and an optical device chip 63. The housing 61 is seated on one side of the bottom surface of the frame 41, And the protruding portion of the lead 62 is disposed on the upper electrode pad of the substrate 42 and is electrically connected. A specific description of the optical device package 44 will be described below with reference to FIG.

The optical path 45 is inserted and mounted in the housing 61 of the optical device package 44. Both side surfaces of the optical path 45 are formed with grooved guide portions 45a which are recessed to the inside of the optical path 45 to assure the optical alignment by mounting the optical path 45 and the optical device package 44. The housing 61 of the optical device package 44 is formed with a guide portion 61a having a protruding shape in which the guide portion 45a of the optical path 45 is fitted.

The shell 46 has a structure that covers the frame 41 and covers the top of the frame 41. One side upper surface of the shell 46 is protruded in the longitudinal direction from the upper surface of the frame 41. This allows the shell 46 to fix one end of the optical path 45 mounted on the optical device package 44 . On both outer sides of the shell 46, a hook 46a having a groove to be fitted in the engagement projection 41a of the frame 41 is formed. A latch 46b is formed in the shell 46 to be used when the plug 40 is disengaged from the receptacle 70 (that is, when the plug 40 is detached). It is preferable that the latch 46b is provided only on one side of the shell 46 and the latch 46b is formed integrally with the hook 46a. The shell 46 may be composed of a metal body or the like for element (component) protection and shielding.

The receptacle 70 is composed of an insulator 71 and an electrical lead 72 mounted on the bottom surface of the insulator 71.

The electrical lead 72 has a shape protruding upward from the insulator 71 and the central portion of the electrical lead, that is, the portion of the plug 40 where the electrical pad 42a of the substrate 42 comes into contact is elastic . Portions of the electrical leads 72 protruding from both side surfaces of the bottom surface of the insulator 71 are electrically connected to the electrode pads on the board. The insulator 71 may be made of a plastic injection material or the like, and the electrical lead 72 may be made of a metal having elasticity.
6 and 12, the electrical lead 72 includes a lead portion 721 electrically connected to an electrode pad, a cushion portion 722 for improving elasticity, a substrate 40 of a plug 40 An elastic protrusion 723 for contact with the electrical pad 42a of the elastic protrusion 723, an extension 724 extending from the elastic protrusion 723, and an engaging portion 725. The upper surface of the electrical lead 72 is exposed at a portion excluding the engaging portion 725 and the engaging portion 725 is preferably located at the end of the electrical lead 72 in order to improve the elasticity Do.

The receptacle 70 may be mounted on the board through any one of processes such as flip chip bonding, SMT, reflow, wire bonding, and the like.

The insulator 71 has a structure in which the plug 20 is seated in the downward direction and fastened. A latch 71a for catching the pawl 46a of the shell 46 of the plug 20 at one side end inner side surface of the insulator 71 and a shell 71b for inserting the shell 20 of the plug 20 A projection 71b that is fitted in a groove formed in the latch 46b of the latch 46 is formed.

As described above, the photoelectric interconnection module of the present invention has a fastening structure between the plug 40 and the receptacle 70. Particularly, the plug 40 is equipped with the photoelectric conversion / transmission function, that is, the substrate 42, the optical control element 43, the optical device package 44 and the optical transmission path 45 are mounted, The electrical lead 72 is mounted on the receptacle 70. The electric lead 72 is mounted on the receptacle 70 so that the electric signal to be converted is transferred to the plug 40 or the electric signal converted from the plug 40 is received from the plug 40 .

In the plug 40, the substrate 42 on which the optical control element 43 is mounted is mounted in the frame 41, and the optical device package 44 is mounted on the side surface of the substrate 42 on the frame 41 And has an assembling structure in which the optical path 45 is mounted to the optical device package 44. [

Advantages of the present invention compared to the prior art 3 are as follows. In addition, other features of the present invention will be described later in detail.

Since the optical alignment is performed in the optical device package 44 of the plug 40, the optical connection (focusing) reliability can be ensured without being affected by the physical engagement instability between the plug 40 and the receptacle 70 at all.

In addition, since the electrical connection function is mounted on the receptacle 70, the optical device chip 63 of the optical device package 44 is not affected at all by mounting the receptacle 70 on the board in the reflow process, The plug 40 can be easily assembled and the reliability of the manufacturing process can be ensured since it is only necessary to fasten the plug 40 to the receptacle 70. [

The functions of the elements and components of the plug 40 will now be described.

The substrate 42 has wiring (not shown) for electrical connection between elements. That is, the optical control element 43 and the optical device package 44 are electrically connected through the wiring of the substrate 42. [ The light control element 43 and the board are electrically connected through the contact between the electrical pad 42a formed on the lower side of the substrate 42 and the electrical lead 72 of the receptacle 70. [

The substrate 42 may be a single-sided PCB, a double-sided PCB, a multi-layer PCB, an FPC, an IC substrate, an interposer, or the like. In the present invention, it is easy to connect and mount devices using a PCB as a substrate, and in particular, it is easy to mount the optical control device 43 and the optical device package 44 on the substrate 42 by a reflow process, I can guarantee sex. In addition, since the electric pad 42a is formed on the lower surface of the substrate 42 to realize the electric connection function, the electric wiring module in the form of a plug electric connector having a smaller size and a smaller size than the other electric wiring modules using the B2B electric connector It can be implemented.

On the other hand, as described in the background art, the photoelectric interconnection module of the present invention includes a transmitter and a receiver. For example, in the case of an optoelectric wiring module for high-speed transfer of large-capacity data between boards in a device, a transmitter is mounted on a main board on which a CPU is mounted, a receiver is mounted on a display board, and an optical path is formed between the transmitter and the receiver.

The transmitter and receiver of the photoelectric interconnection module of the present invention are the same in shape and structure as shown in the figure, except that a light emitting control element, a light emitting element package (for example, a VCSEL package) Package (e.g., PD package) is provided.

The light control device 43 controls the driving of the optical device package 44 that performs photoelectric conversion of the signal (e.g. in PD) or electro-optical conversion (e.g. in VCSEL) And a light receiving control element is mounted as a light control element in the receiving portion.

That is, the light emission control device drives and controls the light emitting device package so that the electric signal is converted into an optical signal through an electrical signal processing process that is input through the substrate lower electrical pad. Such a light emission control element may be composed of components such as a SerDes chip, a Driver IC, and a resistor.

The light-receiving control element drives and controls the light-receiving element package to convert the optical signal input from the optical transmission path into an electrical signal for signal processing. Such a light-receiving control element may be composed of components such as a Trans-Impedance Amplifier (TIA), an amplifier, and a SerDes chip.

The optical path 45 may be implemented by an optical waveguide, an optical fiber (e.g., POF), or the like, and it may suffice to provide a core or a clad as an optical transmission medium.

Next, the optical device package 44 will be described in detail with reference to Fig.

One side surface and a part of the upper surface of the housing 61 are opened and a guide portion 61a having a protruding shape in which the guide portion 45a of the optical path 45 is inserted is formed. An optical element chip 63 is mounted on the lead 62 and the lead 62 is mounted inside the housing 61. Such an optical device package of the present invention can be defined as a so-called 'Side View optical device package', and is implemented by packaging a housing, a lead, and an optical device chip.

The housing 61 is formed with a top surface at a portion of the housing 61 at a predetermined height so as to fix the swinging of the end of the optical path 45 in a state where the optical path 45 is inserted.

The guide portion 45a of the optical path 45 is inserted into the guide portion 61a of the housing 61 when the optical path 45 is inserted, Respectively. In particular, the mounting by the guide portion can prevent the optical core 45 of the optical path 45 and the optical element chip 63 inside the housing 61 from deviating from the outgoing surface or the incident surface optical focusing position And the end core of the optical path 45 is inserted to a position near the exit surface or incidence surface of the optical device chip 63 (optical alignment assurance).

The housing 61 may be made of a plastic injection material or the like and may be formed by bonding the optical device chip 63 to the lead 62 after manufacturing the plastic injection material or attaching the plastic injection material to the lead 62, The chip 63 can be packaged by insert molding and mounting.

The optical element chip 63 is mounted over the two leads 62. The optical device chip 63 is a component that emits light from the chip surface or receives light to the chip surface, and may be, for example, a light emitting device chip such as a VCSEL or a light receiving device chip such as a PD. That is, in the case of the VCSEL, the optical device chip 63 converts the electric signal inputted from the optical control element 43 through the lead 62 into an optical signal and outputs the optical signal to the surface direction, that is, . As will be described later, as the optical transmission path 45 is mounted from the open side direction of the housing 61, the outgoing light of the VCSEL is incident on the optical transmission path 45.

The lead 62 is mounted on the housing 61 in a state in which the optical device chip 63 is mounted on the outer surface of the side wall of the housing 61 from the open side direction of the housing 61. [ In mounting the housing of the lead 62, the optical device chip 63 is positioned at the center of the housing, and the exit surface or the incident surface direction of the optical device chip 63 is directed toward the open side direction of the housing 61 .

The projecting portion of the lead 62 of the photonic device package 44 is abutted against the electrode pad on the substrate 42 when the above optical device package 44 is mounted on the side surface of the substrate 42 on the frame 41 do. The lead 62 is mounted on the electrode pad of the substrate 42 to be connected to the substrate 42 and the optical device chip 63, that is, functions as an electric signal wiring, and can be realized as a metallic conductive material or the like.

In this way, when the optical device package 44 is mounted on the side surface of the substrate 42, the exit surface or the incident surface of the optical device chip 63 is placed on the same axis on the frame 41 in parallel with the optical path 45 And are optically connected.

The optical coupling between the optical device package 44 and the optical path 45 of the present invention will now be described in more detail.

The guide portion 45a of the optical path 45 is inserted into the guide portion 61a of the housing 61 of the optical device package 44 and inserted into the optical device chip 63. [ At this time, the core end of the optical path 45 is mounted to a position (for example, a distance within a few tens of 탆) substantially close to the outgoing surface (or the incident surface) of the optical device chip 63 in the optical device package 44 do.

Permeable epoxy is filled inside the housing 61 in which the optical path 45 is mounted and / or around the end core of the optical path 45. This compensates for the optical coupling between the optical path 45 and the optical element path exit surface (or entrance surface) of the optical path 45 spaced from each other, so that the core of the optical path 45 is stably fixed. Here, the light transmissive epoxy preferably has a refractive index similar to that of the optical path 45, and is preferably a polymer-based epoxy having good light transmittance. For example, a light transmissive epoxy having a refractive index of 1.2 to 1.8 and a light transmittance of 80 to 95% in the wavelength band of the optical path 45 may be used.

In the present invention, the reason why the optical device package as shown in FIG. 8 is described is as follows.

The exit surface or the incident surface of the optical device chip 63 of the optical device package 44 is disposed on the side surface of the substrate 42 and disposed on the same axis parallel to the optical path 45 in the present invention. That is, the outgoing direction (or incidence direction) of the optical device chip 63, the longitudinal direction of the frame 41 and the substrate 42, and the longitudinal direction of the optical path 45 are the same horizontal structure.

In general, VCSEL (Vertical Cavity Surface Emitting Laser) is a type in which a DBR laser is turned at its end. Unlike a normal LD, light is emitted from a surface rather than a side surface.

That is, the die of the VCSEL chip is mounted on the upper surface of the substrate of the optoelectric wiring module to emit light in the upward direction of the substrate, and it is necessary to change the direction perpendicular to 90 ° by using the 45 ° mirror surface in order to optically couple with the optical path .

In other words, the VCSEL chip can not be mounted on the substrate so as to emit light toward the optical transmission path mounted on the substrate, and as described in the related art, when the VCSEL chip is mounted on the upper surface of the substrate or on the side surface of the substrate It can be confirmed that many problems occur.

On the other hand, a well-known LED package also has a structure in which a lead is formed on the opposite surface side (i.e., the die portion of the chip) of the light emitting surface, so that it can not emit light toward the optical transmission path laid on the substrate. That is, even if the LED package structure is dedicated to the photoelectric module, optical coupling can not be guaranteed.

Accordingly, in the present invention, in order to allow the VCSEL chip and the optical transmission path to be arranged on the same axis in parallel and optically coupled, This is referred to as a 'horizontal alignment structure' in the present invention. An optical device package as shown in FIG. 8 is proposed, from which light direct coupling (butt-coupling) and passive-alignment can be achieved.

Of course, since the VCSEL and the PD have the same structure, the PD in the present invention can be packaged as an optical device as shown in FIG. That is, the light emitting device package and the light receiving device package follow the structure of the optical device package 44 described above. Here, the light emitting device chip of the light emitting device package may be a VCSEL or LED having a predetermined wavelength band and several to several tens of Gbps performance, preferably a VCSEL. The light-receiving element chip of the light-receiving element package may be implemented by a PD or the like.

Next, an assembling process of the photoelectric interconnection module will be described with reference to FIG. 9, and a process of unbonding the plug and the receptacle will be described with reference to FIG.

FIG. 9 is an assembled view for explaining the manufacturing process of the photoelectric interconnection module of the present invention, and FIG. 10 is a perspective view for explaining the attaching / detaching process of the plug and the receptacle of the present invention.

The frame 41 is manufactured by using the plastic injection molding material and the package 61 is manufactured by packaging the housing 61 and the lead 62 and the optical device chip 63. Then, the shell 46 is fabricated using a metal body. A guide portion 45a is formed on the side surface of the optical path 45,

Then, the optical control element 43 is mounted on the substrate 42. At this time, the light control device 43 may be mounted on the substrate 42 by any one of processes such as flip chip bonding, SMT, reflow, wire bonding, and the like.

Then, the substrate 42 on which the optical control element 43 is mounted is inserted into the frame 41 and mounted.

Then, the light control element 43 is mounted on the support bottom surface of the frame 41 so as to be arranged in the lateral direction of the substrate 42. At this time, the lead 42 of the optical device package 44 is electrically connected to the electrode pad of the substrate 42 by any one of processes such as flip chip bonding, SMT, reflow, wire bonding, ) To connect them electrically.

Then, the optical transmission path 45 is inserted into the optical control device 43 mounted on the frame 41 and the substrate 42, and is mounted.

Then, the shell 46 is attached to the frame 41.

Then, the plug 40 to which the shell 46 is mounted on the frame 41 is fastened to the receptacle 70 in the downward direction.

As described above, the photoelectric interconnection module of the present invention can be mass-produced in the form of individual parts, and can be easily assembled in units of individual parts, thereby enhancing the mass productivity.

10 shows a state in which the plug 40 and the receptacle 70 are engaged with each other. By manually pressing the latch 46b of the shell 46 in the direction of the arrow in the drawing, the latch 46b The plug 40 is lifted upwards to attach and detach the plug 40 from the receptacle 70 while the groove formed in the receptacle 70 is locked from the projection 71b of the receptacle 70. [ The state in which the plug 40 is disengaged from the receptacle 70 is shown in Fig. 9H.

Advantages of the photoelectric interconnection module of the present invention as described above are summarized as follows.

It is possible to use devices and parts of an optoelectric wiring module including an optical device package as they are without any additional processing. It is easy to mass-produce the device at low cost and high reliability, And so on. In addition, the mirror surface processing step of the optical path is not required.

As a horizontal alignment structure between an optical device package and an optical transmission line, an optical device package and an optical transmission path can be butt-coupled to each other at a close distance without any separate member such as a lens and a mirror. It is possible to perform passive-alignment instead of active optical alignment in which position adjustment is performed while measuring with the measuring equipment in the case of coupling, thereby ensuring optical coupling reliability and physical stability of parts mounting.

Since it has a horizontal alignment structure instead of a vertical alignment, the optical alignment distance can be minimized and the optical alignment reliability can be achieved.

It is easy to apply to the internal board of the application product, and the performance and reliability can be ensured, so that the photoelectric wiring module can be commercialized.

Next, an example in which the photoelectric interconnection module of the present invention is mounted in the device and used for data transfer connection between the intra-device boards will be described with reference to FIG.

11 is an explanatory diagram showing an apparatus to which the photoelectric wiring module of the present invention is applied.

As shown in the figure, the present invention is mounted on a board for use in high-speed transfer of large-capacity data between boards in a device.

The photoelectric module in the device will be described as an example of transferring image data between the CPU and the display in the smartphone.

In the optoelectronic wiring module in the device, the transmitter 91 is attached (detached) to the main board to make an electrical connection, and an electric signal sent from the main board is inputted to the light emission control element of the transmitter 91. On the other hand, the receiving unit 92 is attached (detached) to the display board so that electrical connection is established, and an electric signal received from the light-receiving control element of the receiving unit 92 is input to the display board.

Although various embodiments of the present invention have been described by taking an example of a photoelectric interconnection module for unidirectional data transmission, it is possible to implement a photoelectric interconnection module for bidirectional data transmission by constituting a transceiver unit on a first substrate and a transceiver unit on a second substrate And a plurality of transmission / reception units, that is, an optical device package array, may be formed on each of the first substrate and the second substrate to implement a multi-channel bidirectional data transmission optical interconnect module.

In an embodiment of the present invention, an optical device package is formed by packaging an optical device chip in an injection molding housing. However, optical devices (e.g., VCSEL, PD) and optical control devices (e.g., Driver IC, TIA, SerDes) Or may be implemented in a single package together in an injection housing.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

40: plug 70: receptacle
41: frame 41a:
42: substrate 42a: electrical pad
43: optical control element 44: optical element package
45: optical transmission path 45a, 61a:
46: shell 46a: hook
46b: latch 61: housing
62: lead 63: optical device chip
71: insulator 71a:
71b: projection 72: electrical lead

Claims (4)

In a receptacle of a photoelectric wiring module,
An insulator mounted on the board; And
The electrical leads
/ RTI >
The electrical lead has a shape protruding upward from the insulator and electrically connected to an electrical pad formed on the lower surface of the plug of the photoelectric module,
The central portion of the electrical lead has elasticity in an upward direction,
The electrical lead portions protruding from both side surfaces of the bottom surface of the insulator are electrically connected to the electrode pads of the board,
The electrical lead includes a lead portion electrically connected to the electrode pad, a cushion portion for improving elasticity, an elastic projection portion for contacting the electrical pad of the plug substrate, an extension portion extending from the elastic projection portion,
The upper surface of the portion of the electrical lead excluding the coupling portion is exposed, the coupling portion 725 is located at the end of the electrical lead 72,
A protrusion that is fitted in a groove formed in a latch of a shell of a plug of the optoelectric wiring module is formed on an inner side surface of the other side end of the insulator, And a plurality of the photoelectric conversion elements are formed.

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