JPS5916389A - Bidirectional optical module and device thereof - Google Patents

Abstract

PURPOSE:To obtain the small-sized bidirectional optical module of high reliability by a method wherein a receiving module and a transmitting module are airtightly sealed using an inorganic material in such a manner that they are optically separated on a multilayer wiring substrate. CONSTITUTION:A receiving module and a transmitting module are optically separated on wiring substrates 17, 18 and 19 using a ceramic green sheet 20 for spacer, a weld ring 21 such as cobalt and a shell 22. At the same time, a transmitting module chamber 161 and a receiving module chamber 162, wherein said receiving and transmitting modules can be airtightly sealed, are provided. A transmitting module 30A is constituted by mounting a light-emitting element 24, a driver IC 25, a by-pass capacitor 26, and a resistor 251, and a receiving optical module 30B is constituted by mounting a light-receiving element 27, a receiver IC 28 and a by-pass capacitor 29. The above is optically coupled with an optical fiber through the intermediary of a window part 23 consisting of glass. As no organic substance is used in an enclosure, the high and low temperature resisting property and the damproof property of the titled optical module can be markedly improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a bidirectional optical module and its device.

[Technical background of the invention and its problems] Optical transmission systems include unidirectional transmission systems and bidirectional transmission systems. Among these, unidirectional transmission systems amplify electrical signals at one end of an optical fiber using a tribar circuit. Later LED (
A transmitting module that converts the optical signal into an optical signal using a light emitting diode (light emitting diode) or LI) (laser diode) is installed, and this optical signal is transmitted via an optical fiber. At the other end of the optical fiber, there is an FD (photo FD) that converts the optical signal into an electrical signal. diode) and A)
This method includes a receiving module consisting of an 'D (avalanche photodiode) and a receiver circuit that amplifies and reproduces this electrical signal.

However, in this case, since the driver circuit and receiver circuit in the transmitting module and receiving module are composed of discrete elements, they are larger in size, require more assembly man-hours, and require a metal envelope and receptacle.
There is a problem of high cost.

The two-way transmission system uses two sets of unidirectional transmission systems, including optical fibers, so that transmission and reception can be performed at both ends of the optical fiber, but in this case as well, the transmission module and reception Since the driver circuit and receiver circuit in the module (module) D are composed of discrete elements, they are large in size, require a large number of assembly steps, and use a metal envelope receptacle, resulting in high costs.

In order to overcome these problems and realize a low cost structure, the driver circuit and receiver circuit are integrated with the light emitting element and light receiving element, or are made into separate ICs, fixed on a lead frame, and first molded with transparent plastic. Furthermore, a structure is known in which the transmitter module and the receiver module, which are molded with transparent plastic, have a fitting part with an optical connector on the part facing the light-emitting element and the light-receiving element, and are attached to a light-opaque plastic molded body. It is being

Next, an example of using this structure in a bidirectional optical module device will be explained with reference to FIGS. 1 to 3.

That is, the bidirectional optical module device (1) has a transmitting side connector (
A transmitting optical module (5) and a receiving optical module (6) shown by broken lines are provided in a light-opaque plastic molded body (4) in which a receiving connector (3) and a receiving connector (3) are bored in four parts, Lead wires (71 (8)) are separately provided from these modules (5) t61, and among these, for example, the receiving optical module (6) is connected to the lead wire (71 (8)) of the lead wires (8) as shown in FIG. 8I) includes P l) and A
A receiver circuit ICθ is mounted and fixed on the light receiving element (9) consisting of a PD and the lead wires (8,), and after predetermined wiring is performed, a transparent plastic mold is formed. The structure of the transmitting optical module (5) is similar except that a light emitting element and a driver circuit IC are used.

However, the bidirectional optical module device having such a structure has the following problems.

First, the transmitting optical module (5) and the receiving optical module (
6) are both molded with transparent plastic, so reliability and especially moisture resistance are poor.
(121℃2atm), it will fail in a few hours.

Second, the optical axes of the optical fiber and the light emitting and light receiving elements must be precisely aligned in order to achieve efficient optical coupling, but since the light emitting and light receiving elements are mounted on the lead wires, warping of the lead wires may occur. Optical axis misalignment is likely to occur due to minute deformation.

Thirdly, it is difficult to incorporate a bypass capacitor between the power supply (Vcc) and ground, and a resistor that determines the forward current of the light emitting element.

Fourth, even though it is called a bidirectional module device, since it is just a transmitting optical module and a receiving optical module housed in a single glue receptacle, the size cannot be reduced that much, and there are many assembly steps, terminals, etc., and it is still difficult to transmit and receive signals. Put the optical modules on the sides into one glue septacle, and it will be made into one piece.2
When optically coupling with a core optical connector, the dimensional tolerances and clearances of the transmitting and receiving optical modules cause optical axis misalignment, which deteriorates the optical coupling effect.

Fifth, as optical modules become faster at several IQMb/s, grounding occurs between wiring lines, especially from the light transmitting element, as oscillation occurs due to the capacitance of the input to the PA IC and the output from the receiver IC. It is necessary to handle this with a potential conductor, but this is not possible with just a lead wire.

OBJECT OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and provides a bidirectional brake module that is small, highly reliable, low cost, and capable of extremely high-speed optical communication. and its purpose is to provide the same.

SUMMARY OF THE INVENTION The present invention provides a multilayer wiring board made of ceramic plates that break predetermined wiring, and a multilayer wiring board that is provided on the multilayer wiring board and is optically separated from each other and that can be hermetically sealed. A receiving module chamber, a transmitting module chamber, at least a light receiving element mounted in the receiving module chamber, at least a light emitting element mounted in the transmitting module chamber, and an upper lid having at least a transparent part facing the light receiving element and the light emitting element. In addition, at least a driver circuit is installed in the transmitting module room, and at least a receiver circuit is installed in the receiving module room, and they are electrically interconnected, and the voltage supply terminal and ground terminal of these interconnections are made common. The bidirectional module device is made small in size and is characterized by having a fitting portion on the outside of the bidirectional optical module having the above-described structure, which is formed by a plastic mold.

Embodiments of the invention] Next, embodiments of the bidirectional optical module are shown in FIGS. 4 to 8,
An embodiment of the bidirectional optical module device will be described with reference to FIG.

First, a first embodiment of the bidirectional optical module will be described with reference to FIG.

That is, a wiring board a (181 (11) and a spacer QI made of a donut-shaped ceramic green sheet) are each made of a ceramic green sheet on which a predetermined wiring is passed.
ll). On a multilayer wiring board that has been subjected to a predetermined heat treatment, a seven-lamic clean sheet in the shape of a doughnut for a spacer (weld ring (21) of Sakaki or Kovar) and a shell (2) are optically separated and hermetically sealed. A transmitting module room (161) and a receiving module room (16t) are provided.With this structure, in a bidirectional optical module, a power terminal (Vcc) and a ground terminal ( GN
D) and because the optical transmission module handles high-speed signals of several tens of Mb/s and weak signal currents of several hundred nA, multilayer wiring of about three layers is required, so the board is a multilayer wiring board. This is because it is optimal.

This transmitting module chamber (161) is equipped with a light emitting element @, a driver IC (25), a bypass capacitor (2G), and a resistor (251) that controls the current flowing through the light emitting element (24), resulting in a transmitting optical module (30A). The receiving module chamber (i6z) is equipped with a light receiving element (27), a receiver IC (c), and a bypass capacitor Q to form a receiving optical module (30B). Here, the weld ring (2I) and the spacer (A) are brazed and the shell (2 is seam welded to the weld ring (21), and the shell @ has a window made of glass etc.
c) is provided, and optical coupling with an optical fiber is possible through this window cl.

With this structure, organic materials are not used in the envelope and the envelope is made of ceramic, metal, and glass for airtight sealing, so its high and low temperature resistance and moisture resistance are comparable to conventional figures 1 to 3. It is much improved than the one shown in Brenoshachnocates Day Oo.

No abnormalities occurred even after the passage of time. This bidirectional optical module has a receiving connector (52) as shown in Figure 9.
The transmission side connector (53) is inserted and fixed in the position shown by the broken line in the light-opaque plastic molded body (54) which has four parts. It forms an optical module device and is fitted with a two-core optical connector.

In this case, the board surface on which the light emitting and light receiving elements are mounted and the mating direction of the optical connector are r6 angles, and since the optical connector is normally attached and detached from the side, the lead frame GD and the board surface are connected to the bidirectional optical module. It is best to use a flat package with parallel lines.

Generally, the can structure is used as a hermetic sealing technology, but this can structure is suitable for bidirectional optical modules when considering multilayer wiring, optical insulation between transmitting and receiving optical modules, and plant packaging. However, according to this embodiment, an extremely small and highly reliable bidirectional optical module can be obtained. Send it again.

Since the receiving optical module is mounted on a single board with high precision, the optical axis misalignment with the optical fiber is small. Furthermore, by making the power supply terminal and ground terminal common, and incorporating a bypass capacitor, the conventional method that required eight lead wires can be replaced with just four, as seen in No. 9M, making it easier for mounting engineers and systems. This is very advantageous in terms of circuit design.

Next, a second embodiment of the bidirectional optical module of the present invention will be described with reference to FIG. In the figure, the same reference numerals as in FIG. 4 indicate the same parts and will not be particularly described.

That is, this embodiment excludes the spacer, and is an example in which the weld ring Qυ is directly placed on the wiring board (11), and the shell (the two are welded together).

Next, a third embodiment of the bidirectional optical module of the present invention will be described with reference to Figure @6. In the figure, the same reference numerals as those in the first embodiment indicate the same parts, and no particular explanation will be given.

That is, in this embodiment, the weld ring is also an example in which a shell (24) is brazed to the metallized layer on the wiring board.

Next, the fourth reference numeral of the bidirectional optical module of the present invention indicates the -qB component and will not be specifically explained.

That is, in this embodiment, one shell (3z) has two bad parts (3z).
31) (33J is installed and welded to the weld ring (41).1 This may be brazed directly to the metallized layer on the wiring board (1!1) without the weld ring (4I).

Next, a fifth embodiment of the bidirectional optical module of the present invention will be explained with reference to FIG. 8. In the drawings, the same reference numerals as in the first embodiment indicate the same parts and will not be particularly described.

v (j, in this example, spacer ceramic (40)
This is an example in which the window part (43+) (43y) made of glass is directly brazed with a frit seal.
1) (432) may be one piece.

Although the lead wires in the second to fifth embodiments described above are not shown in the drawings, they are the same as in the embodiment of Raku I.

[Effects of the Invention] As described above, according to the bidirectional optical module and its device of the present invention, the receiving module and the transmitting module are hermetically sealed using an inorganic member so as to be optically separated on the multilayer wiring board. They are interconnected and have a common power source and ground, so firstly, they have excellent airtightness, and secondly, they have excellent airtightness.
It emits light and the positioning between the light receiving elements is accurate.It is small and has few wires, making it easy to wire.Using a multilayer wiring board, it is possible to receive and receive high speed optical signals of several tens of Mb/s. It has the effect of enabling transmission, and its industrial value is extremely large.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing an example of a conventional bidirectional optical module device. Figure 1 is a plan view, and Figure 2 is a cross-section of Figure 1 taken along line A-A. 3 is an explanatory diagram of the transmitting optical module, FIG. 4 is a sectional view showing an embodiment of Ml of the bidirectional optical module of the present invention, and FIG. 5 is an explanatory diagram of the second bidirectional optical module of the present invention. A sectional view showing an embodiment; FIG. 6 is a sectional view showing a third embodiment of the optical module of the present invention;
FIG. 7 is a cross-sectional view showing a fourth embodiment of the optical module of the present invention, FIG. 8 is a cross-sectional view of the fifth embodiment of the optical module of the present invention, and FIG. FIG. 9 is a plan view showing an example of an optical module device to which the optical module of FIG. 8 is mounted. 5.3OA, -1......-Transmission optical module b, 3on,...--Reception optical module 9.27...--Light receiving element 17, 18, 19, River・Wiring board 20.40 --- Spacer 21.41 --- Weld ring 22.32
−-7 El 23+33++32t, 43++432・Window part 24 −
・・・・・Light-emitting device agent Patent attorney Izuchi Ido Figure 9 Procedural amendment (voluntary) 58, 4.27 1981 Director-General of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case 1988 Patent Application No. 124424 2 Name of the invention Bidirectional optical module and its device 3 Amendment person 4 Agent □・ No. 4-41-11 Kamata, Ota-ku, Tokyo 144 - Tsunoda Pill Inoue Patent Office 5 , Full text of the specification to be amended 6, Contents of the amendment as shown in the appendix Amended specification ■ Title of the invention One-way optical module and its device 2 Claims +1+ Each is made of a ceramic plate having predetermined wiring. a multilayer wiring board; a receiving module chamber and a transmitting module chamber provided on the multilayer wiring board and capable of being optically separated from each other and hermetically sealed; a light receiving element mounted at least in the receiving module chamber; A bidirectional optical module comprising at least a light emitting element mounted in the transmitting module chamber, and an upper lid whose surface facing the light receiving element and the light emitting element is at least a transparent member. (3) The bidirectional structure according to claim 1, characterized in that at least a driver circuit is incorporated in the transmitting module chamber, and at least a receiver circuit is incorporated in the receiving module chamber, and that they are electrically interconnected. optical module. (4) The bidirectional optical module according to claim 3, characterized in that the mutual wiring, the pressure supply terminal, and the ground terminal are common. (5) A multilayer wiring board made of a ceramic plate each having a predetermined wiring, and a receiving module chamber and a transmitting module chamber provided on the multilayer wiring board, which are optically separated from each other and can be hermetically sealed. , a light-receiving element mounted at least in the receiving module chamber, a light-emitting element mounted at least in the transmitting module chamber, and an upper lid whose surface facing the light-receiving element and the light-emitting element is at least a transparent member. 1. A bidirectional optical module device, characterized in that a fitting part for an optical connector is provided on the outside of the optical module by plastic molding or by adhesion to a receptacle. 3. Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a bidirectional optical module and its device. [Technical background of the invention and its problems] Optical transmission systems include unidirectional transmission systems and bidirectional transmission systems. Among these, the unidirectional transmission system transmits an electrical signal to one end of an optical fiber after being amplified by a driver circuit. LED (
A transmitting module that converts the optical signal into an optical signal using a light emitting diode (light emitting diode) or LD (laser diode) is installed, and this optical signal is transmitted via an optical fiber.The other end of the optical fiber is a PD (photodiode) that converts the optical signal into an electrical signal. ) and A
This method uses a receiving module consisting of a PD (avalanche photodiode) and a receiver circuit that amplifies and reproduces this electrical signal. However, when transmitting signals from one station to another, it is not only necessary to transmit signals unilaterally from one station to another.
There is often a need to communicate signals with each other. When transmitting signals between each other, two sets of optical transmitting modules and two
Each optical fiber must be wired, installed, and connected to a connector separately. On the other hand, the bidirectional transmission system uses two sets of unidirectional transmission gold optical fibers, including gold optical fibers7, so that transmission and reception can be performed at both ends of the optical fiber, and it is used for optical signal transmission between the two stations. In any of the suitable cases, if the driver circuit or receiver circuit in the transmitting module or receiving module is slidable with a disk IJ-to-type element, for example, the size becomes large. Furthermore, in either case, there are problems in that the number of assembly steps increases and the cost increases because a metal envelope receptacle is used. In order to solve all of these problems and realize a low cost structure, the driver circuit and receiver circuit can be integrated with all the light emitting elements and light receiving elements, or they can be made into separate ICs, fixed on a lead frame, and first molded with transparent plastic. A structure that attaches to a light-opaque plastic molded body with a fitting part for an optical connector on the part opposite to the light-emitting element or light-receiving element of the transmitting side module or receiving side module, which is made of a longer and thicker transparent plastic mold. It has been known. Next, an example of using this structure in a bidirectional optical module device will be explained with reference to FIGS. 1 to 3. That is, the bidirectional optical module device o)ii-s is placed in a light-opaque plastic molded body (4) in which a recess (2) on the transmitting side and a recess (3) on the receiving side are bored, as indicated by broken lines in FIG. The transmitting optical module (5) and receiving optical module (
6) is provided. These modules F5) (6
) are separately provided with lead wires (71+81).For example, in the receiving optical module (6), as shown in FIG.
There is a light receiving element (9) consisting of PD + APD, lead # (
The receiver circuit ICs (+1) are placed and fixed on L), and after the specified wiring is done, transparent plastic,
molded. The structure of the transmitting optical module (5) is the same except that a light emitting element and a driver circuit ICf are used. However, the bidirectional optical module device having such a structure has the following problems. First, since both the transmitting optical module (5) and the 1fF mourning optical module (6) are molded with transparent plastic, reliability, especially moisture resistance, is poor, and, for example, pressure is generated. Second, the optical axes of the optical fiber, the light emitting device, and the light receiving device need to be precisely aligned in order to achieve efficient optical coupling, but since the light emitting device and the light receiving device are mounted on the lead wire, the lead wire is warped. The optical axis is easily misaligned due to slight deformation or slight deformation. Thirdly, even though it is a bidirectional module device, it is just a transmitting optical module and a receiving optical module placed in a single glue receptacle, so the thickness cannot be made that much smaller, the assembly time and number of terminals are large, and the transmitting and receiving optical modules are A receiving optical module is placed in one glue receptacle, and two integrated components are attached to this.
When optically coupling with a core optical connector, the dimensional tolerances and clearances of the transmitting and receiving optical modules completely cause optical axis misalignment, which deteriorates the optical coupling effect. Fourthly, as the speed of optical modules increases to several lQMb/s, the influence of stray capacitance between wires becomes greater, and it is necessary to remove stray capacitance between wires, but this is not possible with lead wires alone. Fifth, with only lead wires, wiring can only be done on the same plane, and since it is easily deformed, bypass capacitors cannot be incorporated, so minute fluctuations in the power supply voltage can be applied to the receiver IC.
There was a risk that it would affect the system and cause it to malfunction. [Object of the Invention] The present invention has been made in view of the above-mentioned conventional problems, and provides a bidirectional optical module and its device that are small, highly reliable, low cost, and capable of high-speed optical communication. is intended to provide. [Summary of the Invention] The present invention is directed to a multilayer wiring board made of a ceramic plate having all predetermined wiring, and a receiving module chamber that is provided on the multilayer wiring board and is optically separated from each other and can be hermetically sealed. and a transmitting module chamber, at least a light receiving element mounted in the receiving module chamber, at least a light emitting element mounted in the transmitting module chamber, and an upper lid whose surface facing the light receiving element and the light emitting element is at least a transparent member, In addition, at least a driver circuit is incorporated in the transmitting module room, and at least a receiver circuit is incorporated in the receiving module room, and they are electrically interconnected, and the voltage supply terminal and ground terminal of these interconnections are made common, thereby reducing the size. The bidirectional module device ρ is characterized in that a fitting part for an optical connector is provided on the outside of the bidirectional optical module having the above-mentioned lateral end by means of a plastic mold or by adhesion to a septum. [Embodiments of the Invention] Next, embodiments of the bidirectional optical module are shown in Figs. 4 to 8,
An embodiment of the bidirectional optical module device will be described with reference to FIG. First, a first embodiment of the bidirectional optical module will be described with reference to FIG. That is, a wiring board (f+7) made of a ceramic green sheet with predetermined wiring, a spacer made of a donut-shaped ceramic green sheet (
') On a multilayer wiring board that has been overlaid with A and subjected to a prescribed heat treatment, a donut-shaped ceramic green sheet for a spacer (weld ring (21) such as 澹 or Kovar) and a shell (21) are optically separated. , a transmitting module chamber (16s) and a receiving module chamber (162) are provided, each of which is hermetically sealed.With such a structure, the power supply to each of the transmitting and receiving optical modules in a bidirectional optical module is provided. In order to make the terminal (Vcc) and the ground terminal (GND) common, the optical transmission module also uses high-speed signals of several tens of Mb7's and several hundred nanometers.
This is because a multilayer wiring board of about three layers is required since a weak signal current of A is handled, so a multilayer wiring board is optimal for the board. If the proposed multilayer wiring board has two chambers, it will be easy to install the light emitting element CI! 4)
, driver IC'25), a bypass capacitor (A), and a resistor (25+) that controls the current flowing through the light emitting element (24J) are installed, and the transmitting optical module (3O
A) It can be configured such that the receiving module chamber (16) consists of a light receiving element (27), a receiver ICt2[9, and a bypass capacitor (2) is installed and a receiving optical module (30B) e. , here, the weld ring Qυ and the spacer (A) are brazed, the shell (23 is seam welded to the weld ring (2I), and the window part (23) made of glass etc.
A floor is provided to enable optical coupling with the optical fiber through this window (21).Since the transmitting module room (16) and the receiving module room (16) can take up sufficient space, the power supply The resistor (251) required between (Vcc) and the ground to control the current flowing through the electrical conductor (A) and the light emitting element Q4 can be easily installed.With this structure, organic substances can be prevented from entering the envelope. Since the airtight seal is made of ceramic, metal, and glass instead of using a ceramic, the high and low temperature resistance and moisture resistance are much improved compared to the conventional ones shown in Figures 1 to 3. Even after 1,000 hours had elapsed, this bidirectional optical module did not cause any problems.When this bidirectional optical module is mated with a two-core optical connector, as shown in Figure 9, the hole that optically couples with the optical fiber connects. A bidirectional optical module device is formed by inserting and fixing the receptacle (54) made of a light-impermeable plastic molded body, for example, into a resector (54) made of a light-opaque plastic molded body, forming a bidirectional optical module device.In this case, the light-emitting and light-receiving elements are mounted. The printed circuit board surface and the mating direction of the optical connector are at right angles, and since optical connectors are usually connected and removed from the side, a flan 1 package with the lead frame (31) and the board surface parallel is used for a bidirectional optical module. Generally speaking, the technology for airtight sealing is to weld a metal seal to the nockle header (often with a 7-inch A-yan structure.However, this key structure uses multilayer wiring, transmission, and optical insulation between the receiving optical modules). However, according to this embodiment, an extremely small and highly reliable bidirectional optical module can be obtained.One transmitting and one receiving optical module is used. Because it is precisely mounted on the board, there is little optical axis misalignment with the optical fiber.Furthermore, for example, if the power, source, and ground terminals are shared, a built-in bypass capacitor can be used instead of the conventional 8
Although four lead wires were required, as can be seen in FIG. 9, only four lead wires are required, which is extremely advantageous in circuit design of the system in terms of implementation. Next, a second embodiment of the bidirectional optical module of the present invention will be described with reference to FIG. In the figure, the same reference numerals as those in FIG. A third embodiment of the bidirectional optical module of the present invention will be described with reference to FIG. 6. In the figure, the same reference numerals as in the first embodiment indicate the same parts. In other words, in this example, the weld ring is also excluded, and the metallized layer on the wiring board (11) is covered with a shell (23V solder + 1 digit).Next, the fourth example of the bidirectional optical module of the present invention Example 7
This will be explained using figures. In the figures, the same reference numerals as in the first embodiment indicate all the same parts and will not be particularly described. That is, in this embodiment, one shell (32) has two windows (
33+) (33t) and weld ring (41)
This is an example of welding (41)
The fifth embodiment of the bidirectional optical module of the present invention will be explained with reference to FIG. 8. The same reference numerals as in the embodiment above indicate the same parts, and no particular explanation will be given.In other words, in this embodiment, the window portion (43+) (43z) that extends directly from the glass to the spacer ceramic (40) is an example in which a frit seal or brazing is applied. Yes, window section!'43
tl(43Z) may be one piece. In the second to fifth embodiments described above, the lead wires are not shown in the drawings, but they are the same as in the first embodiment. [Effects of the Invention] As described above, according to the bidirectional optical module and its device of the present invention, an inorganic member is used to optically separate the receiving module and the transmitting module on the multilayer wiring board, so that the module is airtight and weight-resistant. First, it has excellent airtightness. Second, the mutual positioning of the light emitting and light receiving elements is accurate. Thirdly, it is small in size, and fourthly, it uses a multilayer wiring board, which has the effect of being able to receive and transmit high-speed optical signals of several tens of Mb/s, and its industrial value is extremely large. 4. Brief description of the drawings FIGS. 1 to 3 are diagrams showing an example of a conventional bidirectional optical module device. FIG. 1 is a plan view, and FIG. 3 is an explanatory diagram of the transmitting optical module, FIG. 4 is a sectional view showing the first embodiment of the bidirectional optical module of the present invention, and FIG. 6 is a sectional view showing a second embodiment of the bidirectional optical module of the invention, FIG. 6 is a sectional view showing a third embodiment of the optical module of the invention, and FIG. 7 is a sectional view of the fourth embodiment of the optical module of the invention. FIG. 8 is a sectional view showing a fifth embodiment of the optical module of the present invention, and FIG. 9 is an example of an optical module device in which the optical module of FIGS. 4 to 8 is installed. 5, 3OA... Transmitting optical module 6, 30B... Receiving optical module 9.27... Light receiving element +7. .41...Weld ring 22.32...Shell. 23.331,32t143+1432...Window part 24
...Light emitting device agent Patent attorney Inoue -Male

Claims (4)

[Claims] (1) A multilayer wiring board made of ceramic boards each having a predetermined wiring, and a multilayer wiring board provided on these multilayer wiring boards,
A receiving module chamber and a transmitting module chamber that are optically separated from each other and can be hermetically sealed; a light receiving element mounted at least in the receiving module chamber; and a light emitting element mounted at least in the transmitting module chamber; 1. A two-way optical module, comprising: an element; and an upper lid that faces the light-receiving element and the light-emitting element and is made of at least a transparent member. (2) Both systems according to claim 1, characterized in that at least a Drino (circuit) is incorporated in the transmitting module chamber, and at least a receiver circuit is incorporated in the receiving module chamber, and they are electrically interconnected. Phototropic module. (3) The bidirectional optical module according to claim 2, characterized in that the voltage supply terminal and the ground terminal of the mutual wiring are common. (4) a multilayer wiring board made of a ceramic plate each having a predetermined wiring; a receiving module chamber and a transmitting module chamber provided on the multilayer wiring board, optically separated from each other and capable of being airtightly sealed; A light receiving element mounted at least in the receiving module chamber, a light emitting element mounted at least in the transmitting module chamber, and an upper lid whose surface facing the light receiving element and the light emitting element is at least a transparent part. A bidirectional optical module device characterized in that a fitting part for an optical connector is provided on the outside of the optical module by plastic molding or by adhesion to a small septacle.