KR20160017806A - Optical Interconnection Device - Google Patents

Abstract

Provided is an optical interconnection device. In the optical interconnection device connected to one end of an optical fiber connector comprising a plurality of optical fibers in order to perform bidirectional communication, the optical interconnection device of the present invention includes: a base which loads a driving circuit chip and a receiving circuit chip arranged adjacently to the driving circuit chip, and loads a light reception source and a light emission source electrically connected to the driving circuit chip and the receiving circuit chip; and an optical array block which comprises a plurality of first lenses on one plane corresponding to the optical fiber connector and a plurality of second lenses on other plane corresponding to the light emission source and the light reception source, is integrated with an array lens coupler having a refraction surface between the first lens and the second lens, and comprises a first position determining pin inserted to a position determining hole formed in the optical fiber connector correspondingly at one side and a second position determining pin inserted to a position determining groove formed on an upper plane of the base correspondingly to be aligned on an upper part of the base.

Description

[0001] Optical Interconnection Device [

The present invention relates to an optical interconnection device, and more particularly, to an optical interconnection device which is simple in overall structure, easy to process, easy in packaging process, and capable of precisely aligning components.

In general, optical modules are classified into active optical cable type optical module, array type optical connection optical module, optical USB, optical HDMI, optical DVI and optical display port. Recently, demand for high-definition multimedia interface (HDMI) In the case of an active optical cable (hereinafter referred to as AOC) such as a DisplayPort and a DVI (Digital Visual Interface), more than four channels are required to focus four or more wavelengths on one optical fiber for A / V data transmission .

In addition, the electrical connection has already been limited in connection systems such as general chip and chip (Chip-to-Chip), board-to-board, board and system, system and system, The demand for optical modules such as optical interconnection devices for data transmission continues to increase.

Such an optical module may include many precision injection molds having a specific shape and a fiber block having a guide pin attached thereto. In the case of an injection molding, a process of putting a lot of time and cost into an accurate tolerance control is required. When a single mode fiber having a diameter of about 1 m is used, the final tolerance between the fiber and the optical device must be controlled within a few micrometers.

Further, the optical module has a structure that optically couples an optical element array block having a lens module including a mirror whose optical path is converted to the same 90 degrees, and an optical fiber array, and has a structure for optically coupling between an optical fiber and a mirror, Or a process of aligning the lens and the optical element is indispensable. In addition, a general optical module has a disadvantage in that many parts, such as a mirror, a lens, a supporting mechanism, a spacer for securing a space for optical coupling, and the like are used, because the optical coupling efficiency between the final optical fiber and the optical element is not good.

The optical module may include a fiber array block having a guide hole and a guide pin on a silicon wafer. When the optical device and the optical fiber are connected by a manual alignment method, a through hole is formed in a precise position on the silicon wafer .

It is very difficult to fabricate the guide pin and the fiber array block including the guide pin, and the optical module has a disadvantage that cracks may be generated in the silicon mount due to contact with the guide pin, resulting in poor reliability. Also, in the case of an optical module, there is a problem that electric performance is deteriorated due to electrical crosstalk between transmission lines between adjacent channels, which is more serious as the transmission speed increases.

(Patent Document 1) KR10-1256814 B1

Patent Document 1 discloses a fully-manually-aligned packaged optical module in which all the alignments are aligned by a manual alignment method in packaging optical modules.

However, such a conventional optical module has a problem in that it is difficult to mass-produce and cost-reduce the number of components, and assembly process and manual alignment are complicated.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an optical interconnect device, which is simple in overall structure, easy to process, easy in packaging process, .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided an optical interconnection device connected to one end of an optical fiber connector having a plurality of optical fibers so as to enable bidirectional communication. The optical interconnection device includes a driver circuit chip, A base mounted with a light emitting source and a light receiving source which are electrically connected to the driving circuit chip and the receiving circuit chip, respectively; An array lens having a plurality of first lenses on one surface thereof corresponding to the optical fiber connector and having a plurality of second lenses on the other surface corresponding to the light emitting source and the light receiving source and having a refracting surface between the first lens and the second lens, And a second positioning pin inserted into the positioning groove formed on the upper surface of the base is provided on the lower surface of the base, A plurality of photo-acoustic-wave blocks arranged on an upper surface of the base; And an optical interconnection device.

Preferably, the base has a mounting groove recessed at a predetermined depth to mount the driving circuit chip and the receiving circuit chip on a mounting surface relatively lower than the mounting surface on which the light emitting source and the light receiving source are mounted.

Preferably, the base includes an upper conductive pattern on the upper surface that is wire-bonded to the driver circuit chip and the reception circuit chip through a metal wire, and the upper conductive pattern includes a lower conductive pattern electrically connected via conductive via holes, And the lower conductive pattern is electrically connected to the conductive pad of the module substrate.

Preferably, the optical airlayers are provided with a step on the upper surface of the base to prevent interference with the light source when the base is coupled with the base.

Preferably, the optical word line block includes an opening formed to pass through the driving circuit chip and the receiving circuit chip mounted on the base.

Preferably, a module substrate on which the base is mounted is further provided on an upper surface having conductive pads electrically connected to the lower conductive pattern.

Preferably, the cover further includes a protrusion formed on an outer periphery of the base, the protrusion being engaged with a protrusion formed on the protrusion.

Preferably, the protective cover has an assembling jaw that is coupled to an extension portion of the extension extending from the region where the locking hole is formed to a predetermined length so as to be difficult to be separated from the assembling hole formed in the module substrate on which the base is mounted.

The present invention as described above has the following effects.

(1) By combining the ray block with the light having the array lens coupler on the upper surface of the base having the light emitting source and the light receiving source in addition to the driving circuit chip and the receiving circuit chip, and by coupling the connector optical fiber to the light emitting array block, Since the alignment between the light source and the multi-channel optical fiber can be performed easily and quickly, the packaging process can be easily performed to reduce the manufacturing cost and the product reliability of the optical module can be improved by precisely aligning the components.

(2) Since the overall structure of the base and the optical wave block is simple, it is possible to miniaturize the product, and the manufacturing cost can be reduced by reducing the number of constituent parts.

1 is an overall perspective view showing an optical interconnection device according to a preferred embodiment of the present invention.
2 is an exploded perspective view illustrating an optical interconnection device according to a preferred embodiment of the present invention.
3A and 3B are perspective views illustrating a base used in an optical interconnection device according to a preferred embodiment of the present invention.
4A and 4B are perspective views illustrating a photo-acoustic-wave block used in an optical interconnection device according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

1 to 4B, the optical interconnection device 100 according to a preferred embodiment of the present invention is connected to one end of an optical fiber connector 200 having a plurality of optical fibers F to enable bidirectional communication And includes a base 110 and a foreign language ray block 120.

The base 110 includes a driving circuit chip 111 and a receiving circuit chip 112 disposed adjacent to the driving circuit chip 111. The base 110 is mounted on the upper surface of the base 110 in such a manner as to be electrically connected to the driving circuit chip 111 A light source 114 mounted with a light emitting source 113 connected by wire bonding via wire and being wire-bonded via another metal wire so as to be electrically connected to the receiving circuit chip 112 is mounted.

The light source 114 may be a photodiode (PD), a photodiode (PD), a light emitting diode (LED), a light emitting diode ) Array. ≪ / RTI >

The base 110 has a placement groove 115 formed at a predetermined depth so as to mount the driving circuit chip and the receiving circuit chip on a mounting surface relatively lower than the mounting surface on which the light emitting source 113 and the light receiving member 114 are mounted, .

The driving circuit chip 111 and the receiving circuit chip 112 mounted on the placement groove 115 are wire-bonded through the upper conductive pattern 116a pattern-printed on the upper surface of the base 110 and the metal wire And a lower conductive pattern 116b electrically connected to the conductive pad 136 of a module substrate 130 which is electrically connected to the lower conductive pattern 116a via a conductive via hole, .

Here, the upper conductive pattern 116a and the lower conductive pattern 116b are formed by selectively forming a predetermined pattern by using a laser on the surface of the base 110 which is injection-molded by the resin injected into the cavity of the metal mold (Molded Interconnect Device) method in which a conductive pattern is formed secondarily using electroless plating.

In addition, a positioning recess 117 is formed at both left and right sides of the upper surface of the base to correspond to a second positioning pin to be described later. The outer edge of both sides of the base has a hook So that the engaging protrusion 118 protrudes therefrom.

The optical talker block 120 integrally includes an array lens coupler 125. The array lens coupler 125 includes an optical fiber connector in which a plurality of optical fibers F composed of a core and a cladding layer are arranged in a multi- 200 and a plurality of second lenses 125c on the other surface corresponding to the light emitting source 113 and the light receiving member 114. The first lens 125a corresponds to the plurality of optical fibers on one surface corresponding to the light source 113, And a refracting surface 125b which is inclined at approximately 45 degrees between the first lens 125a and the second lens 125c.

Accordingly, the light generated from the light source is incident through the second lens 125c, reflected by the refracting surface 125b, and then partially reflected from the plurality of optical fibers F corresponding to the first lens 125a, The optical signal entering through the second optical fiber among the plurality of optical fibers F is incident through the first lens 125a and reflected by the refracting surface 125b, Is received by the light receiving unit corresponding to the light receiving unit 125c.

A plurality of optical fibers inserted in the optical fiber connector 200 and corresponding to the positioning holes 201 formed on the left and right sides of the optical fiber connector 200, And a pair of left and right first positioning pins 123 protruding outside by a predetermined length so as to be in one-to-one correspondence with the plurality of first lenses 125a provided in the block.

A pair of right and left positioning grooves 117 are formed on the lower surface of the optical airlay block 120 so as to be recessed at both left and right sides of the upper surface of the base 110, And a pair of left and right second positioning pins 123 protruding downwardly in a lengthwise direction so as to be in a one-to-one correspondence with the plurality of second lenses 125c provided in the optical ring block of the base.

The first lens 125a of the array lens coupler 125 is coupled to the first lens 121a of the array lens coupler 125 when the first positioning pin 123 of the optical array block 120 and the positioning hole 201 of the optical fiber connector 200 are coupled to each other. And the optical fiber of the optical fiber connector 200 coincide with each other to form a series of optical paths while the second positioning pin 127 of the opticalarray block 120 and the positioning groove The second lens 125c of the array lens coupler 125 and the water and light emitting sources 113 and 114 coincide with each other to form a series of optical paths.

At this time, the optical airlay block 120 is mounted on the lower surface corresponding to the light emitting source 113 and the light receiving source 114, and is mounted on the upper surface of the base when the base 110 is coupled with the base 110. [ It is preferable to provide the step 121 so as to prevent interference.

In addition, the optical airlay block 120 includes an opening 124 formed through the driving circuit chip and the reception circuit chip mounted on the base so as to be exposed to the outside.

The base 110 coupled with the optical word line block 120 includes a module substrate 130 having a conductive pad 136 electrically connected to a lower conductive pattern 116b formed on a lower surface of the base Can be mounted on the upper surface.

And a protective cover 140 covering the base 110 and the optical airlay block 120 assembled with the base 110. The protective cover 140 is formed of a box structure on an approximately rectangular parallelepiped, And a locking hole 148a which is resiliently coupled to the locking protrusion 118 protruding from the outer edge of the base 110 is provided on both left and right sides.

The optical fiber connector 200 may include a cutout portion 140 formed at one side of the protective cover 140 to prevent interference between the first positioning pin 123 of the opticalarray block 120 and the optical fiber connector 200 coupled thereto, (142).

The protective cover 140 has extension portions 148 extending from the left and right sides of the locking hole 148a so as to be fixed with respect to the module substrate on which the base 110 is mounted. And the extension 148 may be provided with an assembly jaw 148b that is coupled to the assembly hole 138 formed on the module substrate 130 so as to be difficult to be separated from the module assembly.

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 inventions. It will be apparent to those of ordinary skill in the art.

110: Base
111: drive circuit chip
112: Receiving circuit chip
113: light source
114: light source
115: Batch groove
116a: upper conductive pattern
116b: lower conductive pattern
117: Positioning groove
118:
120: Mineral Ray Block
121: step
123: first positioning pin
124: opening
125: Array lens coupler
125a: first lens
125b: refracting surface
125c: second lens
127: second positioning pin
130: module substrate
136: conductive pad
138: Assembly
140: protective cover
142: incision
148: Extension part
148a:
148b:
200: Fiber optic connector

Claims (8)

1. An optical interconnection device connected to one end of an optical fiber connector having a plurality of optical fibers so as to enable bidirectional communication,
A base on which a driving circuit chip and a receiving circuit chip disposed adjacent thereto are mounted and on which a light emitting source and a light receiving source electrically connected to the driving circuit chip and the receiving circuit chip are mounted;
An array lens having a plurality of first lenses on one surface thereof corresponding to the optical fiber connector and having a plurality of second lenses on the other surface corresponding to the light emitting source and the light receiving source and having a refracting surface between the first lens and the second lens, And a second positioning pin inserted into the positioning groove formed on the upper surface of the base is provided on the lower surface of the base, A plurality of photo-acoustic-wave blocks arranged on an upper surface of the base; Wherein the optical interconnection device comprises: The method according to claim 1,
Wherein the base has a mounting recess formed at a predetermined depth so as to mount the driving circuit chip and the receiving circuit chip on a mounting surface relatively lower than a mounting surface on which the light emitting source and the light receiving source are mounted. The method according to claim 1,
The base includes an upper conductive pattern on an upper surface thereof, which is wire-bonded to the driving circuit chip and the receiving circuit chip through a metal wire, and the upper conductive pattern has a lower conductive pattern electrically connected via a conductive via hole And the lower conductive pattern is electrically connected to the conductive pad of the module substrate. The method according to claim 1,
Wherein the optical airlayers have a stepped portion to prevent interference with a water source and a light source mounted on an upper surface of the base when the optical airlayers are coupled with the base. The method according to claim 1,
Wherein the optical airlay block includes an opening formed to pass through the driving circuit chip and the receiving circuit chip mounted on the base so as to be exposed to the outside. 6. The method according to any one of claims 1 to 5,
Further comprising a module substrate on which the base is mounted on an upper surface having a conductive pad electrically connected to the lower conductive pattern. 6. The method according to any one of claims 1 to 5,
The optical interconnection device according to claim 1, further comprising: a protective cover that surrounds and protects the optical wordlayers assembled with the base, the optical cover having a locking hole corresponding to a locking protrusion protruding from an outer edge of the base. 8. The method of claim 7,
Wherein the protective cover has an assembly protrusion that is coupled to the protrusion formed on the module substrate on which the base is mounted, so that the protrusion is difficult to be separated from the protrusion, Interconnection device.

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