CN217981942U

CN217981942U - Transmitting end subassembly and photoelectric coupling device

Info

Publication number: CN217981942U
Application number: CN202222474987.3U
Authority: CN
Inventors: 蒋金元; 何凌波
Original assignee: Shenzhen Jucan Microelectronics Technology Co ltd
Current assignee: Shenzhen Jucan Microelectronics Technology Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2022-12-06
Anticipated expiration: 2032-09-19

Abstract

The embodiment of the utility model provides a transmitting end subassembly and optoelectronic coupling device, the transmitting end subassembly includes housing unit, transmitting end unit and first encapsulation unit, the housing unit includes casing body and first circuit unit; the first circuit unit comprises at least one first connecting unit and at least one second connecting unit; the transmitting end unit comprises at least one transmitting end element, and a connecting end of the first connecting unit and a connecting end of the second connecting unit are arranged on the inner surface of the top of the shell body and are connected with the transmitting end element arranged on the inner surface; the other connecting end of the first connecting unit and the other connecting end of the second connecting unit extend out of the transmitting end assembly or are arranged on the outer surface of the shell body; the first packaging unit is positioned in the groove, covers the transmitting end element and is used for transmitting the light emitted by the transmitting end element to the outside of the first packaging unit. The technical problem that the existing photoelectric coupling device is not perfect is solved.

Description

Transmitting end subassembly and photoelectric coupling device

Technical Field

The utility model relates to an electron field especially relates to a transmitting terminal subassembly and optoelectronic coupling device.

Background

The photoelectric coupler is a photoelectric conversion device for transmitting an electric signal using light as a medium, and is widely used in various circuits. The existing photoelectric coupler has the defects of rough packaging mode, low reliability, low air tightness, short service life and the like.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a pair of transmitting end subassembly and optoelectronic coupling device solves the technical problem that current optoelectronic coupling device is not perfect enough.

In order to solve the above technical problem, an embodiment of the present invention provides a transmitting end assembly, which is adapted to a receiving end assembly to obtain a photoelectric coupling device, where the transmitting end assembly includes a housing unit, a transmitting end unit, and a first packaging unit;

the housing unit includes a housing body and a first circuit unit; the shell body comprises a side part and a top part, the shell body is provided with a groove, the side part and the top part surround to form the groove, and the groove is provided with an opening end opposite to the top part and a bottom end opposite to the opening end; the first circuit unit comprises at least one first connecting unit and at least one second connecting unit; the first connecting unit comprises a first connecting end, a second connecting end and a third connecting end connected between the first connecting end and the second connecting end; the second connecting unit comprises a fourth connecting end, a fifth connecting end and a sixth connecting end connected between the fourth connecting end and the fifth connecting end;

the emitter end unit comprises at least one emitter end element mounted to an inner surface of the top portion;

the first connecting end and the fourth connecting end are arranged on the inner surface of the top part, the first connecting end is connected with the first electrode of the transmitting end element, and the fourth connecting end is connected with the second electrode of the transmitting end element;

the second connecting end and the fifth connecting end extend out of the transmitting end component or are arranged on the outer surface of the shell body and are used for being connected with a circuit outside the transmitting end component;

the first packaging unit is positioned in the groove, covers the emission end element and is used for transmitting the light emitted by the emission end element to the outside of the first packaging unit.

In order to solve the above technical problem, an embodiment of the present invention further provides a photoelectric coupling device, including any one of the above transmitting end assemblies, and further including a receiving end assembly, a second encapsulating unit, a third encapsulating unit, and a fourth encapsulating unit, wherein,

the receiving end assembly comprises a carrier unit and a receiving end unit;

the carrier unit comprises a carrier body, a second circuit unit and a third circuit unit;

the carrier body comprises an upper surface, a lower surface, and a side surface between the upper surface and the lower surface;

the second circuit unit comprises at least one fifth connecting unit and at least one sixth connecting unit, wherein the fifth connecting unit comprises a seventh connecting end, an eighth connecting end and a ninth connecting end connected between the seventh connecting end and the eighth connecting end; the sixth connecting unit comprises a tenth connecting end, an eleventh connecting end and a twelfth connecting end connected between the tenth connecting end and the eleventh connecting end;

the third circuit unit comprises at least one seventh connecting unit and at least one eighth connecting unit, the seventh connecting unit comprises a thirteenth connecting end, a fourteenth connecting end and a fifteenth connecting end connected between the thirteenth connecting end and the fourteenth connecting end; the eighth connecting unit comprises a sixteenth connecting end, a seventeenth connecting end and an eighteenth connecting end connected between the sixteenth connecting end and the seventeenth connecting end;

the receiving end unit comprises at least one receiving end element which is arranged on the upper surface; the seventh connecting end and the tenth connecting end are arranged on the upper surface, the seventh connecting end is connected with the third electrode of the receiving end element, and the tenth connecting end is connected with the fourth electrode of the receiving end element; the eighth connecting end and the eleventh connecting end extend out of the photoelectric coupling device or are arranged on the outer surface of the carrier body and are used for being connected with a circuit outside the photoelectric coupling device;

the thirteenth connecting end and the sixteenth connecting end are arranged on the upper surface, the thirteenth connecting end is connected with the second connecting end in the transmitting end component, and the sixteenth connecting end is connected with the fifth connecting end in the transmitting end component; the fourteenth connecting end and the seventeenth connecting end extend out of the photoelectric coupling device or are arranged on the outer surface of the carrier body and are used for being connected with a circuit outside the photoelectric coupling device;

the transmitting end assembly is arranged on the upper surface of the carrier body, and the opening end of the groove in the transmitting end assembly faces the upper surface of the carrier body and is aligned with the receiving end unit;

the second packaging unit is positioned between the receiving end component and the first packaging unit in the transmitting end component and is used for transmitting the light transmitted by the first packaging unit to the receiving end component;

the third packaging unit is located on the upper surface of the carrier body, and covers the transmitting end assembly and the upper surface of the carrier body except for the eighth connecting end, the eleventh connecting end, the fourteenth connecting end and the seventeenth connecting end;

the fourth packaging unit is a light-tight unit and covers the third packaging unit; or cover the third encapsulation unit and extend to the side and/or the lower surface of the carrier body except for the eighth connection end, the eleventh connection end, the fourteenth connection end, and the seventeenth connection end.

Advantageous effects

The invention provides a transmitting end component, a photoelectric coupling device and a packaging method thereof. The transmitting end assembly provided by the embodiment of the invention not only comprises the transmitting end element, but also comprises the shell unit and the first packaging unit, and the distance between the transmitting end element and the receiving end element can be controlled through the height of the shell unit and the depth of the groove; the shell unit, the first packaging unit and the transmitting end element form an independent device together, and the shell unit and the first packaging unit can play a role in fixing and protecting the transmitting end element, so that the reliability, the air tightness, the service life and the like of the transmitting end are improved; meanwhile, the shell unit, the first packaging unit and the transmitting end element form an independent device together, and the shell unit, the first packaging unit and the transmitting end element are convenient to be matched, installed, updated and replaced with a receiving end assembly.

Furthermore, the groove is cylindrical or conical, the bottom end and the opening end of the groove are planes parallel to each other, the diameter of the bottom end of the groove is smaller than that of the opening end, and the light emitted by the emitting end element can be gathered towards the opening end of the groove by the aid of the shape design of the groove.

Furthermore, the distance between the first packaging unit and the opening end of the groove is larger than a preset distance value, the preset distance value can be determined according to the height of the receiving end unit in the receiving end assembly, damage to the receiving end unit is avoided, and meanwhile, a setting space is reserved for the second packaging unit.

Furthermore, the light emitted by the emitting end element can be transmitted to the opening end of the groove at a first preset angle and a first preset intensity through the design of the material, the placement position, the shape and the like of the first packaging unit, and the directivity of light transmission is realized.

Other features and corresponding advantages of the invention are set forth in the following part of the specification, and it is to be understood that at least some of the advantages become apparent from the description of the invention.

Drawings

Fig. 1 is a schematic cross-sectional view of a transmitting end assembly according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a photoelectric coupling device provided in an embodiment of the present invention;

fig. 3 is a schematic top view of a receiving end module according to a second embodiment of the present invention;

fig. 4 is a schematic bottom surface view of a receiving end module according to a second embodiment of the present invention;

fig. 5 is a schematic flow chart illustrating a packaging method of a photoelectric coupling device according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment is as follows:

the following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings and the embodiments. The embodiment of the utility model provides a transmitting end component, which is applied to a photoelectric coupling device obtained by adapting and mounting with a receiving end component, the transmitting end component comprises a shell unit, a transmitting end unit and a first packaging unit, wherein,

Wherein, the shell body can be square, round, irregular shape, etc. Taking a square as an example, the housing body can comprise 1 top part and 4 side parts vertically connected with the top part, and the 4 side parts are symmetrically arranged at the left, right, front and back. The recess may be located in a middle region of the housing body. The groove is provided with an opening end opposite to the top of the shell body and a bottom end opposite to the opening end. The open end may be circular, square, irregular, etc. The size of the open end can be adapted to the receiving end unit in the receiving end assembly. In some embodiments, the housing body may further comprise a bottom portion disposed opposite the top portion, the bottom portion being provided with the grooved open end.

The casing body can be a light-tight part, or the inner wall of the groove is provided with a light-tight auxiliary part, so that light can be shielded or reflected, and the light is prevented from leaking from the casing body.

The groove can be cylindrical or conical, the bottom end and the opening end of the groove are planes parallel to each other, and the diameter of the bottom end of the groove is smaller than that of the opening end. The shape design of the groove can help to gather the light emitted by the emission end element towards the opening end of the groove. In some embodiments, the shape of the groove may have other designs.

The first circuit unit may include other circuits in addition to the at least one first connection unit and the at least one second connection unit. The first connecting unit and the second connecting unit can be leads, and can also be manufactured in a copper deposition mode and the like. One first connection unit and one second connection unit may be provided for each transmitting end element, two or more transmitting end elements may share the same first connection unit, and two or more transmitting end elements may share the same second connection unit.

The first connecting end and the fourth connecting end are arranged on the inner surface of the top of the shell body and used for being connected into the transmitting end element, the first electrode of the transmitting end element can be one of a positive electrode or a negative electrode, and the second electrode of the transmitting end element is the other of the positive electrode or the negative electrode.

The third connecting end plays a role in connecting the first connecting end and the second connecting end. The sixth connecting end plays a role in connecting the fourth connecting end and the fifth connecting end. The third connection end and the sixth connection end can be partially or completely embedded in the shell body.

The second connecting end and the fifth connecting end are used as external electric connection interfaces of the transmitting end component and are used for being connected with circuits outside the transmitting end component. For example with a third circuit unit in the receiving side subassembly.

The second connecting end and the fifth connecting end can extend out of the transmitting end component or be arranged on the outer surface of the shell body. The outer surface of the housing body includes outer surfaces of the side portions and an outer surface of the top portion. The outer surface of the side portion includes an outer surface disposed adjacent to the top portion or an outer surface disposed opposite the top portion. In some embodiments, the housing body further comprises a bottom portion disposed opposite to the top portion, the bottom portion is provided with a grooved open end, and the second connection end and the fifth connection end may be further disposed on an outer surface of the bottom portion. Preferably, the second and fifth connection terminals are disposed on an outer surface of the bottom portion or on an outer surface of the side portion disposed opposite the top portion for facilitating connection with a third circuit unit in the receiving side subassembly.

The first connecting end, the second connecting end and the third connecting end can be of an integrally formed structure. The fourth connecting end, the fifth connecting end and the sixth connecting end can be of an integrated structure. Of course, in some embodiments, one or more of the first connection end, the second connection end, the third connection end, the fourth connection end, the fifth connection end, and the sixth connection end may be a split structure.

In some embodiments, the first connection unit and the second connection unit may be symmetrically disposed on the housing body.

In some embodiments, the first circuit unit may further include at least one third connection unit disposed symmetrically to the first connection unit, and at least one fourth connection unit disposed symmetrically to the second connection unit. The third connecting unit and the fourth connecting unit can be hollow pins and are symmetrically arranged with the first connecting unit and the second connecting unit, so that the overall structure of the shell unit is balanced, and the transmitting end assembly can be more stably arranged on the receiving end assembly. Of course, in some embodiments, the third connection unit and the fourth connection unit can be connected into the circuit for other purposes.

The transmitting end unit comprises at least one transmitting end element, and a plurality of transmitting end elements can be connected in series, connected in parallel and/or integrated in the same circuit module, and the circuit module can be an integrated chip. The emitter end element may be a light emitting diode, such as an infrared light emitting diode. The shell body can be arranged on the inner surface of the top of the shell body in a die bonding mode, a welding line mode and the like.

The first encapsulation unit may be disposed in the groove in a dispensing or molding manner, and covers the emitting end element, so as to transmit light emitted by the emitting end element to the outside of the first encapsulation unit, for example, to the opening end of the groove and to the receiving end assembly.

In some embodiments, the distance between the first package unit and the opening end of the recess is greater than a predetermined distance, which may be determined according to a height of a receiving end unit in the receiving end assembly, where the height of the receiving end unit may be a height of the receiving end device, a height of a connecting gold wire of the receiving end device, and the like. The damage to the receiving end unit is avoided, and meanwhile, a set space is reserved for the second packaging unit.

In some embodiments, the first encapsulation unit may fill a bottom region of the groove, and a distance from the bottom region to an opening end of the groove is greater than the preset distance value.

In some embodiments, by designing the material, the placement position, the shape, and the like of the first encapsulating unit, the light emitted by the emitting end element is transmitted to the opening end of the groove at a first preset angle and a first preset intensity, and the light transmission directivity is realized.

In the present embodiment, referring to fig. 1, the housing body includes 1 top part 111, and 4 side parts 112 connected to the top part 111 at an angle smaller than 90 degrees, and the 4 side parts 112 are symmetrically disposed at left, right, front, and rear (only 2 left and right side parts 112 are shown in fig. 1, and 2 front and rear side parts 112 are not shown). The shell body is made of opaque materials and is an opaque part. The casing body is equipped with conical recess M, and recess M is located casing body's middle zone, and the recess has the open end to and the bottom that sets up relatively with the open end, and the open end of recess sets up relatively with casing body's top 111, and bottom, open end are squarely, and bottom and open end each other be parallel plane, and in length, width, the bottom is less than the open end.

The first circuit unit comprises a first connection unit, a second connection unit (not shown in fig. 1), a third connection unit and a fourth connection unit (not shown in fig. 1), the first connection unit, the second connection unit, the third connection unit and the fourth connection unit are symmetrically arranged on two sides of the shell body, wherein the first connection unit and the second connection unit are arranged on the right side of the shell body, and the third connection unit and the fourth connection unit are arranged on the left side of the shell body. The third connecting unit and the fourth connecting unit are hollow pins and are symmetrically arranged with the first connecting unit and the second connecting unit, so that two sides of the shell unit are balanced, and the transmitting end assembly can be more stably arranged on the receiving end assembly. The transmitting terminal unit includes a transmitting terminal member 121, and the transmitting terminal member 121 is mounted to the inner surface of the top portion 111 of the housing body.

The first connection unit includes a first connection end 1131, a second connection end 1132, and a third connection end 1133 connected between the first connection end 1131 and the second connection end 1132; the second connection unit includes a fourth connection end, a fifth connection end, and a sixth connection end connected between the fourth connection end and the fifth connection end. Correspondingly, the third connecting unit and the fourth connecting unit respectively comprise 3 connecting ends which are connected in sequence. The first connection end 1131, the second connection end 1132 and the third connection end 1133 are integrally formed, the fourth connection end, the fifth connection end and the sixth connection end are integrally formed, the third connection unit is integrally formed, and the fourth connection unit is integrally formed. In order to facilitate connection with the third circuit unit in the receiving end module, in this embodiment, the corresponding external connection terminals of the second connection unit 1132, the fifth connection unit, the third connection unit, and the fourth connection unit are disposed on the outer surface of the side portion 112 of the housing body opposite to the top portion 111, and are symmetrically disposed on both sides.

First encapsulation unit 13 adopts the mode of gluing to fill up the bottom region of recess M, the distance of bottom region apart from the open end of recess M is greater than preset distance value, first encapsulation unit 13 has first light emitting surface 131 towards the open end direction of recess M, in this embodiment, first light emitting surface 131 is the plane, still has the second light emitting surface towards the recess except that the open end direction, second light emitting surface and recess M correspond the lateral wall position and hug closely, the casing body adopts light-tight material to make, recess M corresponds the lateral wall position and can be in the light, or the reflected light, make more light follow first light emitting surface 131 and emit.

The transmitting end assembly provided by the embodiment comprises the transmitting end element, a shell unit and a first packaging unit, wherein the distance between the transmitting end element and the receiving end element can be controlled through the height of the shell unit and the depth of the groove; the shell unit, the first packaging unit and the transmitting end element form an independent device together, and the shell unit and the first packaging unit can play a role in fixing and protecting the transmitting end element, so that the reliability, the air tightness, the service life and the like of the transmitting end are improved; meanwhile, the shell unit, the first packaging unit and the transmitting end element form an independent device together, and the shell unit, the first packaging unit and the transmitting end element are convenient to be matched, installed, updated and replaced with a receiving end assembly.

Example two:

the following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings and the embodiments. This embodiment provides a photoelectric coupling device, comprising the transmitting side subassembly of any one of the embodiments, and further comprising a receiving side subassembly, a second packaging unit, a third packaging unit, and a fourth packaging unit, wherein,

the receiving end assembly comprises a carrier unit and a receiving end unit;

the second circuit unit comprises at least one fifth connection unit and at least one sixth connection unit, wherein the fifth connection unit comprises a seventh connection end, an eighth connection end and a ninth connection end connected between the seventh connection end and the eighth connection end; the sixth connection unit includes a tenth connection end, an eleventh connection end, and a twelfth connection end connected between the tenth connection end and the eleventh connection end;

the third circuit unit comprises at least one seventh connection unit and at least one eighth connection unit, wherein the seventh connection unit comprises a thirteenth connection terminal, a fourteenth connection terminal and a fifteenth connection terminal connected between the thirteenth connection terminal and the fourteenth connection terminal; the eighth connecting unit comprises a sixteenth connecting end, a seventeenth connecting end and an eighteenth connecting end connected between the sixteenth connecting end and the seventeenth connecting end;

the receiving end unit comprises at least one receiving end element which is arranged on the upper surface;

the seventh connection end and the tenth connection end are arranged on the upper surface, the seventh connection end is connected with the third electrode of the receiving end element, and the tenth connection end is connected with the fourth electrode of the receiving end element; the eighth connecting end and the eleventh connecting end extend out of the photoelectric coupling device or are arranged on the outer surface of the carrier body and are used for being connected with a circuit outside the photoelectric coupling device;

the third packaging unit is located on the upper surface of the carrier body and covers the transmitting end assembly and the upper surface of the carrier body except for the eighth connecting end, the eleventh connecting end, the fourteenth connecting end and the seventeenth connecting end;

The carrier body can be an insulating carrier such as a PCB (printed circuit board) plate and a BT (BT) plate. The carrier body can be made of opaque materials, and light is prevented from leaking out of the carrier body.

The second circuit unit and the third circuit unit may be symmetrically disposed on the carrier body, for example, symmetrically disposed on the left and right sides of the carrier body.

The second circuit unit is used for accessing the receiving end unit, and the third circuit unit is used for accessing the transmitting end unit in the transmitting end component.

The second circuit unit may include other circuits in addition to the at least one fifth connection unit and the at least one sixth connection unit.

The third circuit unit may include other circuits in addition to the at least one seventh connection unit and the at least one eighth connection unit.

The fifth connecting unit, the sixth connecting unit, the seventh connecting unit and the eighth connecting unit may be leads, and may also be manufactured by copper deposition or the like. One fifth connection unit and one sixth connection unit may be provided for each receiving end element, or two or more receiving end elements may share the same fifth connection unit, or two or more receiving end elements may share the same sixth connection unit.

The seventh connecting end and the tenth connecting end are arranged on the upper surface of the carrier body and are used for being connected with a receiving end element, taking the receiving end element as a phototriode as an example, the third electrode, the fourth electrode and the fifth electrode of the receiving end element can be a collector electrode, an emitter electrode and a base electrode respectively, and the base electrode is a photosensitive area. The ninth link plays a role in connecting the seventh link and the eighth link, and the twelfth link plays a role in connecting the tenth link and the eleventh link. The eighth connection terminal and the eleventh connection terminal are used as external electrical connection interfaces of the photoelectric coupling device, and are used for being connected with a circuit outside the photoelectric coupling device, for example, an external power supply. The eighth connection end and the eleventh connection end may extend out of the photoelectric coupling device or be disposed on an outer surface of the carrier body. As an example, the eighth connection end and the eleventh connection end may be disposed on the lower surface of the carrier body. As an example, a groove may be disposed on a side surface of the carrier body, and the ninth connection end and the twelfth connection end may be partially or completely disposed in the groove on the side surface of the carrier body.

The thirteenth connecting end and the sixteenth connecting end are arranged on the upper surface of the carrier body and are used for being connected with the second connecting end and the fifth connecting end in the transmitting end component. The fifteenth link plays the effect of connecting thirteenth link and fourteenth link, and the eighteenth link plays the effect of connecting sixteenth link and seventeenth link. The fourteenth connection end and the seventeenth connection end are used as external electrical connection interfaces of the photoelectric coupling device, and are used for being connected with a circuit outside the photoelectric coupling device, for example, an external power supply. The fourteenth connecting end and the seventeenth connecting end may extend out of the photoelectric coupling device or may be disposed on an outer surface of the carrier body. As an example, the fourteenth connection end and the seventeenth connection end may be disposed on the lower surface of the carrier body. As an example, the eighth connection end and the eleventh connection end may be disposed on the lower surface of the carrier body. As an example, a groove may be provided on a side surface of the carrier body, and the fifteenth connection end and the eighteenth connection end may be partially or entirely provided in the groove on the side surface of the carrier body.

In some embodiments, the fifth connection unit, the sixth connection unit, the seventh connection unit, and the eighth connection unit may be symmetrically disposed on the housing body. So that the overall structure of the carrier unit is balanced.

The receiving end unit comprises at least one receiving end element, and a plurality of receiving end elements can be connected in series, connected in parallel and/or integrated in the same circuit module, and the circuit module can be an integrated chip.

The receiving end element can be a phototriode, and can also be other photosensitive receiving devices. The carrier body can be arranged on the upper surface of the carrier body in a die bonding mode, a wire bonding mode and the like.

The seventh connection end, the eighth connection end and the ninth connection end may be an integrally formed structure, and the tenth connection end, the eleventh connection end and the twelfth connection end may be an integrally formed structure, although in some embodiments, one or more of the seventh connection end, the eighth connection end, the ninth connection end, the tenth connection end, the eleventh connection end and the twelfth connection end may be a split structure.

The thirteenth connecting end, the fourteenth connecting end and the fifteenth connecting end may be an integrally formed structure, the sixteenth connecting end, the seventeenth connecting end and the eighteenth connecting end may be an integrally formed structure, and in some embodiments, of course, one or more of the thirteenth connecting end, the fourteenth connecting end, the fifteenth connecting end, the sixteenth connecting end, the seventeenth connecting end and the eighteenth connecting end may be a split structure.

The transmitting end assembly can be mounted on the upper surface of the carrier body by welding or the like.

The second packaging unit can be disposed between the receiving end device and the first packaging unit in the transmitting end device by dispensing or molding. In some embodiments, the second packaging unit fills the area between the receiving end device and the first packaging unit in the transmitting end component. The second packaging unit and the first packaging unit adopt different packaging materials.

The third packaging unit can be disposed on the upper surface of the carrier body by dispensing or molding, and covers the transmitting end assembly and the upper surface of the carrier body, except for the eighth, eleventh, fourteenth and seventeenth connecting ends, the eighth, eleventh, fourteenth and seventeenth connecting ends need to be exposed for connection with circuits other than the photoelectric coupling device.

The third encapsulation unit may use the same or different encapsulation material as the second encapsulation unit. In some embodiments, the second package unit and the third package unit may be an integrally molded structure.

The fourth packaging unit is a light-tight unit, such as black glue, and can be arranged in a mould pressing mode to cover the third packaging unit; or cover the third encapsulation unit and extend to the side and/or lower surface of the carrier body except for the eighth connection end, the eleventh connection end, the fourteenth connection end and the seventeenth connection end. The eighth, eleventh, fourteenth and seventeenth connection terminals need to be exposed to be connected to a circuit other than the photoelectric coupling device. If the ninth connection end, the twelfth connection end, the fifteenth connection end and the eighteenth connection end are arranged in the side grooves of the carrier body, the fourth packaging unit can cover the connection ends in the side grooves together to protect the connection ends.

In this embodiment, refer to fig. 2, 3 and 4 for illustration, fig. 2 is a schematic cross-sectional view of a photoelectric coupling device provided by embodiment two of the present invention, fig. 3 is a schematic upper surface view of a receiving end assembly provided by embodiment two of the present invention, and fig. 4 is a schematic lower surface view of a receiving end assembly provided by embodiment two of the present invention. The optoelectronic coupling device provided by this embodiment includes the transmitting end module shown in fig. 1 in the first embodiment, and further includes a receiving end module, a second packaging unit 3, a third packaging unit 4, and a fourth packaging unit 5; the receiving end assembly comprises a carrier unit and a receiving end unit; the carrier unit comprises a carrier body, a second circuit unit and a third circuit unit; in this embodiment, the PCB board is used as a carrier body, and includes an upper surface 2111, a lower surface 2112, and a side surface 2113 located between the upper surface 2111 and the lower surface 2112; the left side surface 2113 and the right side surface 2113 are respectively provided with 2 grooves N;

the second circuit unit comprises a fifth connecting unit and a sixth connecting unit, and in the embodiment, the fifth connecting unit and the sixth connecting unit are in an integrated structure; the fifth connection unit includes a seventh connection end 2121, an eighth connection end 2122, and a ninth connection end 2123 connected between the seventh connection end 2121 and the eighth connection end 2122; the sixth connection unit includes a tenth connection end 2124, an eleventh connection end 2125, and a twelfth connection end (not shown in the drawings) connected between the tenth connection end 2124 and the eleventh connection end 2125;

the third circuit unit includes a seventh connection unit and an eighth connection unit, in this embodiment, the seventh connection unit and the eighth connection unit are integrally formed, the seventh connection unit includes a thirteenth connection end 2131, a fourteenth connection end 2132, and a fifteenth connection end 2133 connected between the thirteenth connection end 2131 and the fourteenth connection end 2132; the eighth connecting unit includes a sixteenth connecting end 2134, a seventeenth connecting end 2135, and an eighteenth connecting end (not shown in the drawings) connected between the sixteenth connecting end 2134 and the seventeenth connecting end 2135;

the receiving end unit comprises a phototriode 221, and the phototriode 221 is installed on the upper surface 2111;

a seventh connection end 2121 and a tenth connection end 2124 are arranged on the upper surface 2111, the seventh connection end 2121 is connected with the collector of the phototriode, and the tenth connection end 2124 is connected with the emitter of the phototriode; the ninth connecting end 2123 and the twelfth connecting end are arranged in the two grooves N of the left side surface 2113 and around the grooves N; an eighth connection terminal 2122 and an eleventh connection terminal 2125 are provided on a left side region of the lower surface 2112 of the carrier body for connection to a circuit other than the photoelectric coupling device;

a thirteenth connecting end 2131 and a sixteenth connecting end 2134 are arranged on the upper surface 2111, the thirteenth connecting end 2131 is connected with the second connecting end 1132 in the transmitting end module, and the sixteenth connecting end 2134 is connected with the fifth connecting end in the transmitting end module; the fifteenth connecting end 2133 and the eighteenth connecting end are arranged in the two grooves N of the right side surface 2113 and around the grooves N; a fourteenth connection terminal 2132 and a seventeenth connection terminal 2135 are provided on a right side region of the lower surface 2112 of the carrier body, for connection with a circuit other than the photoelectric coupling device;

in this embodiment, the eighth connection terminal 2122, the eleventh connection terminal 2125, the fourteenth connection terminal 2132 and the seventeenth connection terminal 2135 serve as external electrical connection interfaces of the photoelectric coupling device, and are used for connecting with a circuit outside the photoelectric coupling device, such as an external power supply;

the transmitting end assembly is arranged on the upper surface 2111 of the carrier body in a welding mode, and the opening end of the groove M in the transmitting end assembly faces the upper surface 2111 of the carrier body and is aligned with the phototriode 221;

the second packaging unit 3 and the third packaging unit 4 are integrally formed, and can be realized by dispensing or molding, and the second packaging unit 3 fills the region between the phototransistor 221 and the first packaging unit 13 in the emitter terminal assembly. The third packaging unit 4 covers the transmitting end assembly and the upper surface 2111 of the carrier body except for the eighth connection end 2122, the eleventh connection end 2125, the fourteenth connection end 2132 and the seventeenth connection end 2135; the second packaging unit 3, the third packaging unit 4 and the first packaging unit 13 adopt different packaging materials;

the fourth packaging unit 5 is a light-tight unit, may be made of black glue, and may be disposed in a molding manner to cover the third packaging unit 4 and extend to the side 2113 of the carrier body, except for the eighth connection end 2122, the eleventh connection end 2125, the fourteenth connection end 2132 and the seventeenth connection end 2135.

In the photoelectric coupling device provided by the embodiment, the transmitting end assembly and the receiving end assembly are installed in a matching manner to obtain the photoelectric coupling device, wherein the transmitting end assembly not only comprises the transmitting end element, but also comprises the shell unit and the first packaging unit, and the distance between the transmitting end element and the receiving end element can be controlled through the height of the shell unit and the depth of the groove; the shell unit, the first packaging unit and the transmitting end element form an independent device together, and the shell unit and the first packaging unit can play a role in fixing and protecting the transmitting end element, so that the reliability, the air tightness, the service life and the like of the transmitting end are improved; meanwhile, the shell unit, the first packaging unit and the transmitting end element form an independent device, and the shell unit, the first packaging unit and the transmitting end element are convenient to be matched, installed, updated and replaced with a receiving end assembly.

Example three:

the following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings and the embodiments. The embodiment provides a packaging method of a photoelectric coupling device, which is used for manufacturing the photoelectric coupling device in the second embodiment. Referring to fig. 5, the packaging method of the photoelectric coupling device provided in this embodiment mainly includes:

s101, manufacturing a transmitting end component.

Specifically, the method for manufacturing the transmitting side subassembly in the first embodiment may include the following steps:

and A1, manufacturing a shell unit.

The housing unit comprises a housing body and a first circuit unit; the casing body includes lateral part and top, and the casing body is equipped with the recess, and the lateral part is around forming the recess with the top, and the recess has the open end that sets up relatively with the top, and with the bottom that the open end set up relatively. In some embodiments, the housing body may further comprise a bottom portion disposed opposite the top portion, the bottom portion being provided with the grooved open end.

The casing body can adopt the plastic injection moulding of light tight material, perhaps the inner wall of recess is provided with light tight auxiliary member, can be in the light or the reflection light, avoids light to spill from the casing body.

The first circuit unit comprises at least one first connecting unit and at least one second connecting unit; the number and positions of the first connecting unit and the second connecting unit can be determined according to the requirement and the number of the transmitting end elements.

The first connecting unit and the second connecting unit can be leads, are arranged on the shell body in a through hole mode, and can be manufactured in a copper deposition mode and the like.

The first connecting unit comprises a first connecting end, a second connecting end and a third connecting end connected between the first connecting end and the second connecting end; the second connection unit includes a fourth connection end, a fifth connection end, and a sixth connection end connected between the fourth connection end and the fifth connection end. The first connecting end, the second connecting end and the third connecting end can be of an integrally formed structure. The fourth connecting end, the fifth connecting end and the sixth connecting end can be of an integrated structure. Of course, in some embodiments, one or more of the first connection end, the second connection end, the third connection end, the fourth connection end, the fifth connection end, and the sixth connection end may be a split structure.

The first connecting end and the fourth connecting end are arranged on the inner surface of the top of the shell body and used for being connected into the transmitting end element.

The third connecting end and the sixth connecting end can be partially or completely embedded in the shell body.

The second connecting end and the fifth connecting end are used as external electric connection interfaces of the transmitting end component and are used for being connected with circuits outside the transmitting end component. For example with a third circuit unit in the receiving side subassembly. The second connecting end and the fifth connecting end can extend out of the transmitting end component or be arranged on the outer surface of the shell body. The outer surface of the housing body includes outer surfaces of the side portions and an outer surface of the top portion. The outer surface of the side portion includes an outer surface disposed adjacent to the top portion or an outer surface disposed opposite the top portion. In some embodiments, the housing body may further include a bottom portion disposed opposite to the top portion, the bottom portion being provided with the grooved open end, and the second connection end and the fifth connection end may be further disposed on an outer surface of the bottom portion.

In some embodiments, the first circuit unit may further include at least one third connection unit disposed symmetrically to the first connection unit, and at least one fourth connection unit disposed symmetrically to the second connection unit. The third connecting unit and the fourth connecting unit can be hollow feet and are symmetrically arranged with the first connecting unit and the second connecting unit, so that the whole structure of the shell unit is balanced, and the shell unit can be more stably arranged on the receiving end assembly. Of course, in some embodiments, the third connection unit and the fourth connection unit may be connected to the circuit for other purposes.

Step A2, at least one transmitting end element is arranged on the inner surface of the top of the shell body, the first connecting end is connected with a first electrode of the transmitting end element, and the fourth connecting end is connected with a second electrode of the transmitting end element.

The transmitting end unit comprises at least one transmitting end element, and a plurality of transmitting end elements can be connected in series, connected in parallel and/or integrated in the same circuit module, and the circuit module can be an integrated chip. The emitter end element may be a light emitting diode, such as an infrared light emitting diode. The shell body can be arranged on the inner surface of the top of the shell body in a die bonding mode, a wire welding mode and the like.

And step A3, arranging a first packaging unit in the groove, wherein the first packaging unit covers the transmitting end element and is used for transmitting the light emitted by the transmitting end element to the outside of the first packaging unit. For example, toward the open end of the groove, toward the receiver assembly.

The first packaging unit can be arranged in the groove in a dispensing or molding manner.

In some embodiments, the first encapsulation unit may fill a bottom region of the groove, and a distance from the bottom region to an opening end of the groove is greater than the predetermined distance.

As an embodiment, the step A3 may include:

mixing transparent glue and a first preset admixture according to a first preset proportion to prepare a first colloid;

filling the first colloid to the bottom end area of the groove in a dispensing or mould pressing mode, wherein the distance from the bottom end area to the opening end of the groove is greater than a preset distance value;

and heating and forming the filled first colloid.

The first predetermined admixture may be a light diffusion material, and the light diffusion material includes a nano silicon material and the like.

The first predetermined admixture and the first predetermined proportion may be determined according to a first predetermined angle and a first predetermined intensity of light transmission of the first encapsulating unit, and the first encapsulating unit may be screened for the optical parameter through the first predetermined admixture and the first predetermined proportion.

The first preset angle and the first preset intensity of the light transmission of the first packaging unit can be determined according to the current amplification factor (HFE) of the triode of the receiving end element; or the first preset admixture and the first preset proportion are determined according to the current amplification factor (HFE) of the triode of the receiving end element.

S102, manufacturing a receiving terminal assembly.

In some embodiments, the following steps may be included:

and B1, manufacturing a carrier unit.

The carrier unit comprises a carrier body, a second circuit unit and a third circuit unit; the carrier body includes an upper surface, a lower surface, and a side surface between the upper surface and the lower surface. The carrier body can be an insulating carrier such as a PCB (printed circuit board) plate and a BT (BT) plate. The carrier body can be made of opaque materials, and light is prevented from leaking out of the carrier body.

The second circuit unit and the third circuit unit may be symmetrically disposed on the carrier body, for example, symmetrically disposed on the left and right sides of the carrier body. The second circuit unit comprises at least one fifth connecting unit and at least one sixth connecting unit, wherein the fifth connecting unit comprises a seventh connecting end, an eighth connecting end and a ninth connecting end connected between the seventh connecting end and the eighth connecting end; the sixth connection unit includes a tenth connection end, an eleventh connection end, and a twelfth connection end connected between the tenth connection end and the eleventh connection end. The seventh connecting unit comprises a thirteenth connecting end, a fourteenth connecting end and a fifteenth connecting end connected between the thirteenth connecting end and the fourteenth connecting end; the eighth connection unit includes a sixteenth connection end, a seventeenth connection end, and an eighteenth connection end between the sixteenth connection end and the seventeenth connection end.

The seventh connection end, the eighth connection end and the ninth connection end may be an integrally formed structure, and the tenth connection end, the eleventh connection end and the twelfth connection end may be an integrally formed structure.

The thirteenth connection end, the fourteenth connection end and the fifteenth connection end may be an integrally formed structure, the sixteenth connection end, the seventeenth connection end and the eighteenth connection end may be an integrally formed structure, and certainly, in some embodiments, one or more of the thirteenth connection end, the fourteenth connection end, the fifteenth connection end, the sixteenth connection end, the seventeenth connection end and the eighteenth connection end may be a split structure.

The seventh connecting end and the tenth connecting end are arranged on the upper surface of the carrier body; the eighth connecting end and the eleventh connecting end extend out of the photoelectric coupling device or are arranged on the outer surface of the carrier body and are used for being connected with a circuit outside the photoelectric coupling device.

The thirteenth connecting end and the sixteenth connecting end are arranged on the upper surface of the carrier body; the fourteenth connecting end and the seventeenth connecting end extend out of the photoelectric coupling device or are arranged on the outer surface of the carrier body and are used for being connected with a circuit outside the photoelectric coupling device.

And the eighth connecting end, the eleventh connecting end, the fourteenth connecting end and the seventeenth connecting end are used as external electric connection interfaces of the photoelectric coupling device and are used for being connected with a circuit outside the photoelectric coupling device, such as an external power supply.

And B2, mounting a receiving end unit on the upper surface of the carrier body pair.

The receiving end unit comprises at least one receiving end element, and a plurality of receiving end elements can be connected in series, connected in parallel and/or integrated in the same circuit module, and the circuit module can be an integrated chip. The receiving end element can be a phototriode, and can also be other photosensitive receiving devices. The seventh connecting end can be connected to the third electrode of the receiving end element, and the tenth connecting end can be connected to the fourth electrode of the receiving end element.

The steps S101 and S102 may be parallel or reverse in sequence.

S103, assembling the transmitting side module manufactured in S101 and the receiving side module manufactured in S102.

Specifically, the transmitting end assembly is arranged on the upper surface of the carrier body of the receiving end assembly, and the opening end of the groove in the transmitting end assembly faces the upper surface of the carrier body and is aligned with the receiving end unit; the thirteenth connecting end is connected with the second connecting end in the transmitting end component, and the sixteenth connecting end is connected with the fifth connecting end in the transmitting end component;

And S104, setting a second packaging unit.

A second packaging unit is arranged between a receiving end element in the receiving end assembly and a first packaging unit in the transmitting end assembly, and the second packaging unit is used for transmitting the light transmitted by the first packaging unit to the receiving end element.

And S105, setting a third packaging unit.

And a third packaging unit is arranged on the upper surface of the carrier body, covers the transmitting end assembly and the upper surface of the carrier body, and is except for an eighth connecting end, an eleventh connecting end, a fourteenth connecting end and a seventeenth connecting end.

The third packaging unit can be arranged on the upper surface of the carrier body in a dispensing or molding manner.

The steps S104 and S105 may be performed simultaneously, and the second package unit and the third package unit are formed at one time by dispensing or molding, and the second package unit and the third package unit are formed integrally.

As an example, the following procedure may be used:

mixing the transparent glue and a second preset admixture according to a second preset proportion to prepare a second colloid;

arranging a second packaging unit between the receiving end element and a first packaging unit in the transmitting end assembly in a dispensing or die pressing mode, and arranging a third packaging unit on the upper surface of the carrier body; the second packaging unit and the third packaging unit are of an integrated structure.

The second predetermined admixture may be a light diffusion material, and the light diffusion material includes a nano silicon material and the like.

The second predetermined admixture and the second predetermined ratio may be determined according to a second predetermined angle and a second predetermined intensity of light transmission of the second encapsulating unit, and the second encapsulating unit may be screened for the optical parameter through the second predetermined admixture and the second predetermined ratio. The second packaging unit is equivalent to supplement to the optical transmission of the first packaging unit, and the first packaging unit and the second packaging unit are mutually matched, so that the matching of the transmitting end element and the receiving end element achieves a more concentrated Current Transfer Ratio (CTR).

A first preset angle and a first preset intensity of light transmission of the first packaging unit, and a second preset angle and a second preset intensity of light transmission of the second packaging unit can be determined according to a current amplification factor (HFE) of a triode of a receiving end element; or determining the first preset admixture, the first preset proportion, the second preset admixture and the second preset proportion according to the current amplification factor (HFE) of the triode of the receiving end element.

And S106, setting a fourth packaging unit.

A fourth packaging unit is arranged on the upper surface of the third packaging unit, is an opaque unit and covers the third packaging unit; or cover the third encapsulation unit and extend to the side and/or lower surface of the carrier body except for the eighth connection end, the eleventh connection end, the fourteenth connection end and the seventeenth connection end.

The fourth encapsulation unit is an opaque unit, such as black glue, and can be arranged in a mold pressing manner, and the eighth connection end, the eleventh connection end, the fourteenth connection end and the seventeenth connection end need to be exposed so as to be connected with a circuit outside the photoelectric coupling device. If the ninth connection end, the twelfth connection end, the fifteenth connection end and the eighteenth connection end are arranged in the side grooves of the carrier body, the fourth packaging unit can cover the connection ends in the side grooves together to protect the connection ends.

In some embodiments, the mass production may be implemented by fabricating a transmitting end module array and a receiving end module array, aligning and mounting the transmitting end module array to the receiving end module, disposing the second packaging unit, the third packaging unit and the fourth packaging unit, and cutting at the same time or later to obtain a single photoelectric coupling device or a photoelectric coupling device array.

The embodiment of the utility model provides a photoelectric coupling device's encapsulation method, the transmission end subassembly carries out the adaptation installation with the receiving end subassembly and obtains photoelectric coupling device, and wherein the transmission end subassembly not only includes transmitting end component itself, still includes housing element and first encapsulation unit, can control the distance between transmitting end component and the receiving end component through the height of housing element, the degree of depth of recess; the shell unit, the first packaging unit and the transmitting end element form an independent device together, and the shell unit and the first packaging unit can play a role in fixing and protecting the transmitting end element, so that the reliability, the air tightness, the service life and the like of the transmitting end are improved; meanwhile, the shell unit, the first packaging unit and the transmitting end element form an independent device together, and the shell unit, the first packaging unit and the transmitting end element are convenient to be matched, installed, updated and replaced with a receiving end assembly.

The foregoing is a more detailed description of embodiments of the present invention, and the specific embodiments are not to be considered in a limiting sense. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A transmitting end component is applied to a photoelectric coupling device which is obtained by adapting and installing a receiving end component,

the transmitting end assembly comprises a shell unit, a transmitting end unit and a first packaging unit;

2. The firing end assembly of claim 1, wherein the second connecting end, the fifth connecting end are disposed on an exterior surface of the side portion, the exterior surface of the side portion including an exterior surface disposed adjacent to the top portion or an exterior surface disposed opposite the top portion;

or the shell body further comprises a bottom, the bottom is opposite to the top, the bottom is provided with the opening end of the groove, and the second connecting end and the fifth connecting end are arranged on the outer surface of the bottom.

3. The firing end assembly of claim 1, wherein the housing body is a light-tight member or the interior walls of the recess are provided with a light-tight auxiliary.

4. The firing end assembly of claim 1, wherein the recess is cylindrical or conical, and wherein the bottom end and the open end of the recess are planar and parallel to each other, the bottom end of the recess having a diameter smaller than the diameter of the open end.

5. The firing end subassembly of claim 1, wherein the first encapsulation unit is spaced from the open end of the recess by a distance greater than a predetermined distance value.

6. The firing end subassembly of any one of claims 1-5, wherein the first encapsulation unit fills a bottom end region of the recess, the bottom end region being spaced from an open end of the recess by a distance greater than a predetermined distance value.

7. An optoelectronic coupling device, comprising the transmitting side subassembly of any one of claims 1 to 6, and further comprising a receiving side subassembly, a second packaging unit, a third packaging unit, and a fourth packaging unit, wherein,

the receiving end assembly comprises a carrier unit and a receiving end unit;

the seventh connecting end and the tenth connecting end are arranged on the upper surface, the seventh connecting end is connected with the third electrode of the receiving end element, and the tenth connecting end is connected with the fourth electrode of the receiving end element; the eighth connecting end and the eleventh connecting end extend out of the photoelectric coupling device or are arranged on the outer surface of the carrier body and are used for being connected with a circuit outside the photoelectric coupling device;

the fourth packaging unit is a light-tight unit and covers the third packaging unit; or cover the third encapsulation unit and extend to the side surface and/or the lower surface of the carrier body except for the eighth connection end, the eleventh connection end, the fourteenth connection end, and the seventeenth connection end.

8. The photocoupling device of claim 7, wherein the eighth, eleventh, fourteenth and seventeenth connection terminals are provided at the lower surface of the carrier body.

9. The photocoupling device of claim 7, wherein the second encapsulation unit fills the area between the receiving end component and the first encapsulation unit in the transmitting end component.

10. The photoelectric coupling device of any one of claims 7 to 9, wherein the second encapsulation unit and the third encapsulation unit are of an integrally molded structure.