Package for mounting optical components and optical device

Abstract

The present invention provides an optical-component mounting package including a mounting section on which optical components are mounted, a wall with an opening, a translucent member for covering the opening, and a joining material for joining the translucent member to the wall. The translucent member includes a first surface facing the opening or located in the opening, a second surface opposite to the first surface, and a side surface located between the first surface and the second surface, and the joining material is a low-melting-point glass and is in contact with the wall, the side surface, and the second surface.

Description

Technical Field

[0001] The present disclosure relates to a package for mounting optical components and an optical device.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2015-052629 discloses a package for mounting an optical component, which includes a mounting portion for mounting an optical component, a wall body having an opening, and a translucent member for closing the opening. The translucent member is joined to the wall body via a low-melting glass and a resin-based bonding material.

Summary of the Invention

Means for Solving the Problems

[0003] The package for mounting an optical component according to the present disclosure includes a mounting portion on which an optical component is mounted, a wall body having an opening, a translucent member covering the opening, a bonding material for bonding the translucent member to the wall body, and is provided with The translucent member has a first surface facing the opening or located within the opening, a second surface located on the opposite side of the first surface, and a side surface located between the first surface and the second surface. The bonding material is a low-melting glass and is in contact with the wall body, the side surface, and the second surface 、 When viewed in perspective from a direction perpendicular to the first surface, all of the outer contour lines of the light-transmitting member are located inward of the edge of the opening thereof.

[0004] The optical device according to the present disclosure includes the above package for mounting an optical component, and an optical component mounted on the package for mounting an optical component. and is provided with

Brief Description of the Drawings

[0005]

Figure 1

Figure 2A

Figure 2B

Figure 2C

Figure 3A

Figure 3B

Figure 4A

Figure 4B

Figure 5

Figure 6A

Figure 6B

Figure 7

Figure 8A

Figure 8B

Figure 9A

Figure 9B

Figure 10A

Figure 10B

Mode for Carrying Out the Invention

[0006] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view showing a package for mounting an optical component and an optical device according to an embodiment of the present disclosure. FIGS. 2A to 2C are a front view, a plan view, and a side view, respectively, showing the package for mounting an optical component of the embodiment.

[0007] The package 1 for mounting an optical component of the present embodiment includes a mounting portion 11 on which the optical component 50 is mounted, a wall body 13 having an opening 12, a light-transmitting member 30 that closes the opening 12, and a bonding material 40 that bonds the light-transmitting member 30 and the wall body 13. The opening 12 may be a through-hole in the wall body 13. The opening 12 may be positioned so as to face the optical component 50 mounted on the mounting portion 11. The opening 12 can transmit light between the outside and the inside of the package 1 for mounting an optical component.

[0008] As shown in FIG. 1, the package 1 for mounting an optical component may include a base body 10, and the mounting portion 11 and the wall body 13 may be included in the base body 10. That is, the component including the mounting portion 11 and the component including the wall body 13 may be integrated. Alternatively, the component including the mounting portion 11 and the component including the wall body 13 may be separate bodies, and the components may be joined to each other.

[0009] The base body 10 may include a concave housing portion 15, and the mounting portion 11 may be located in the housing portion 15. The package 1 for mounting an optical component may further include a lid body 20 that seals the housing portion 15. The base body 10 may have a bonding surface 14 to which the lid body 20 is bonded around the housing portion 15. The lid body 20 may be bonded to the bonding surface 14 by seam welding or the like.

[0010] The substrate 10 may have an insulating portion made of an insulating material and a conductor portion located inside and on the surface of the insulating portion. Power, signals, or both may be transferred between the outside and the inside of the substrate 10 via the conductor portion. The insulating portion of the substrate 10 may be composed of a ceramic material such as an aluminum oxide sintered body (alumina ceramics), an aluminum nitride sintered body, a mullite sintered body, or a glass-ceramic sintered body.

[0011] The wall body 13 may be composed of the same material as the substrate 10. By configuring the wall body 13 from a ceramic material, the strength of the substrate 10 can be improved. In addition, when the component having the mounting portion 11 and the component having the wall body 13 are of separate configurations, the wall body 13 may be made of metal.

[0012] The light-transmitting member 30 has light-transmitting properties and is composed of a material that can withstand the temperature at which the bonding material 40 melts. The light-transmitting member 30 may be made of glass. The light-transmitting member 30 may be plate-shaped and is joined to the wall body 13 so as to close the opening 12. Here, "closing (covering)" does not mean in a strict sense. For example, when viewed in plan view, it is sufficient if more than 70% of the opening 12 overlaps with the light-transmitting member 30. The light-transmitting member 30 can transmit light between the outside and the inside of the optical component mounting package 1.

[0013] The bonding material 40 may be a low melting point glass. By applying a low melting point glass, the light transmitting member 30 can be bonded to the substrate 10 at a lower temperature compared to conventional glass bonding materials. Thereby, the reliability of the optical component mounting package 1 can be improved. Also, maintenance of the equipment required for bonding becomes easier. A low melting point glass means a glass that softens and deforms at a lower temperature compared to the light transmitting member 30. Specifically, a low melting point glass is an amorphous or crystalline glass that softens, deforms, and flows at a temperature of 200°C to 950°C. A crystalline glass means a composite of an amorphous glass and a crystalline substance. As the low melting point glass, borosilicate glass, barium borosilicate glass, zinc borate glass, barium borate glass, high silica glass, aluminophosphate glass, phosphate glass, zinc phosphate glass, alkali glass, bismuth silicate glass, bismuth borosilicate salt glass, bismuth zinc borate glass, lead borosilicate glass, lead borate glass, lead potassium glass, crystalline lead glass, etc. can be applied.

[0014] Compared to solder or resin-based adhesives, etc., the low melting point glass strongly generates an action that makes the surface tension strong in the fluid state and approaches a spherical shape so that the surface area becomes small. Further, compared to solder, the low melting point glass does not have strict constraint conditions for the bonding target. When the bonding material 40 is solder and the wall body 13 is an insulating material, there is a constraint condition that metallization and plating are required at the bonding portion of the wall body 13. Further, the low melting point glass is superior in airtightness compared to resin-based adhesives. Therefore, by using the low melting point glass, the airtightness of the optical component mounting package 1 can be improved. Further, the low melting point glass has a higher heat resistant temperature compared to resin-based adhesives. Due to the high heat resistant temperature, when mounting the optical component 50 on the optical component mounting package 1, or when mounting the optical component mounting package 1 (optical device 100) in which the optical component 50 is incorporated on the module substrate, the heat constraint can be reduced, and the degree of freedom in selecting the mounting method can be increased.

[0015] <Details of the joint portion> FIG. 3A and FIG. 3B are a cross-sectional view showing the periphery of the opening of the package for mounting an optical component according to the embodiment and an enlarged view showing the bonding portion Q1 of the translucent member.

[0016] As shown in FIG. 3A, the translucent member 30 has a first surface S1 facing the opening 12, a second surface S2 located on the opposite side of the first surface S1, and a side surface S3 located between the first surface S1 and the second surface S2. The bonding material 40 is in contact with the wall body 13, the side surface S3 of the translucent member 30, and the second surface S2 of the translucent member 30. Here, being in contact may mean being fixed. The portion of the bonding material 40 in contact with the wall body 13, the portion in contact with the side surface S3, and the portion in contact with the second surface S2 may be connected to each other. On the second surface S2, the bonding material 40 may be in contact with the edge of the second surface S2. On the side surface S3, the bonding material 40 may be in contact from the end on the first surface S1 side to the end on the second surface S2 side, or a portion where the bonding material 40 is separated may be included between the end on the first surface S1 side and the end on the second surface S2 side on the side surface S3.

[0017] Since the bonding material 40 is in contact with the side surface S3 and the second surface S2 of the translucent member 30, the bonding material 40 acts to press the translucent member 30 from the second surface S2 toward the first surface S1, and a high bonding strength between the wall body 13 and the translucent member 30 can be obtained. Further, the bonding material 40 in contact with the second surface S2 plays a role of protecting the translucent member 30 from external obstacles. Therefore, damage to the translucent member 30 can be reduced. Thus, the strength of the light-passing portion of the package 1 for mounting an optical component can be improved. Further, the bonding material 40, which is a low-melting-point glass, strongly exhibits the action of trying to become spherical before curing. Therefore, even if the bonding material 40 is located up to the second surface S2, the bonding material 40 rarely spreads greatly on the second surface S2. Therefore, it is easy to secure the area of the effective region of the translucent member 30 while positioning the bonding material 40 on the second surface S2. The effective region means a region through which light can normally pass.

[0018] The configuration in which the bonding material 40 is in contact with the wall body 13, the side surface S3, and the second surface S2 may be present over the entire periphery of the edge portion of the light-transmitting member 30 when viewed from the front (from the direction perpendicular to the first surface), or may be present only in the remaining region excluding a part of the entire periphery of the edge portion of the light-transmitting member 30. If the above configuration is provided over the entire periphery of the edge portion of the light-transmitting member 30, the above-described action can be obtained over the entire region along the edge portion, and the strength of the portion that transmits light can be further improved.

[0019] As shown in FIG. 3A, the thickness D1 of the bonding material 40 may be greater than the thickness D2 of the light-transmitting member 30. With this configuration, the bonding material 40 protrudes in the thickness direction from the second surface S2 of the light-transmitting member 30. Here, "thickness" means the thickness in the direction perpendicular to the first surface S1. Also, here, "thickness" means the thickness at the site where the thickness has the largest variation when there is a variation in thickness. Further, regardless of the thicknesses D1 and D2, the bonding material 40 may protrude from the second surface S2. The protruding direction is the direction perpendicular to the first surface S1. The protruding portion of the bonding material 40 can protect the light-transmitting member 30 from external obstacles. Therefore, the strength of the portion that transmits light of the optical component mounting package 1 can be further improved.

[0020] As shown in FIG. 3B, the bonding material 40 may further be in contact with the first surface S1 of the light-transmitting member 30. With this configuration, the contact area between the bonding material 40 and the light-transmitting member 30 increases, and the bonding strength between the light-transmitting member 30 and the wall body 13 can be further improved. Further, the bonding material 40, which is a low-melting-point glass, strongly generates an action to become spherical before curing. Therefore, even when the bonding material 40 is located on the first surface S1, the bonding material 40 is less likely to spread widely on the first surface S1. Therefore, it is easy to secure the area of the effective region of the light-transmitting member 30 while positioning the bonding material 40 on the first surface S1.

[0021] As shown in FIG. 3B, the wall body 13 has a third surface S13 facing the first surface S1 of the light-transmitting member 30 around the opening 12, and the bonding material 40 may be located between the first surface S1 of the light-transmitting member 30 and the third surface S13 of the wall body 13. Between the first surface S1 and the third surface S13, the bonding material 40 may be located in the first range H1 farther from the opening 12, and a gap may be located in the second range H2 closer to the opening 12. With this configuration, while reducing the possibility that the bonding material 40 located on the second surface S2 overlaps with the opening 12, the contact area between the bonding material 40 and the light-transmitting member 30 can be increased, and the bonding strength between the wall body 13 and the light-transmitting member 30 can be improved. Furthermore, due to the gap in the second range H2, even when stress is generated between the wall body 13 and the light-transmitting member 30 and the stress is applied to the inner peripheral end of the bonding material 40 between the first surface S1 and the second surface S2, the range to which the stress is applied becomes wider, so that the stress concentration can be alleviated. Therefore, the strength and durability of the light-passing portion of the optical component mounting package 1 can be improved.

[0022] As shown in FIG. 3B, in a cross-section perpendicular to the first surface S1, the length T11 of the contact portion between the bonding material 40 and the first surface S1 may be longer than the length T12 of the contact portion between the bonding material 40 and the second surface S2. With this configuration, the airtightness of the opening 12 by the light-transmitting member 30 and the bonding material 40 can be further improved. Here, the "length" refers to the apparent length when ignoring the surface roughness and fine irregularities.

[0023] As shown in FIG. 3A, in a cross-section perpendicular to the first surface S1, the length T21 of the contact portion between the bonding material 40 and the wall body 13 may be longer than the length T22 of the contact portion between the bonding material 40 and the side surface S3 of the light-transmitting member 30. With this configuration, the flatness of the bonding material 40 is increased, and the possibility that the bonding material 40 itself is damaged due to vibration, stress, collision with an object, etc. is reduced. Therefore, the strength and durability of the light-passing portion of the optical component mounting package 1 can be improved. Here, the "length" refers to the apparent length when ignoring the surface roughness and fine irregularities.

[0024] As shown in FIG. 3A, in a cross-section perpendicular to the first surface S1, the outer contour line of the bonding material 40 may include a convex curve C1 outward. The curve means a gently curved line. The curve C1 may be an arc shape. The arc shape includes not only a complete arc but also an arc of an ellipse, an arc of an ellipse, etc. More specifically, among the outer contour lines of the bonding material 40, the outer contour line from the end point P1 of the connection portion between the bonding material 40 and the second surface S2 to the end point P2 of the connection portion between the bonding material 40 and the wall body 13 may be a convex curve C1 outward. By having the convex curve C1 outward, damage to the bonding material 40 itself due to vibration, stress, collision with objects, etc. can be reduced, and the strength and durability of the light-passing portion of the optical component mounting package 1 can be improved.

[0025] As shown in FIG. 2A, when viewed from the front (from the direction perpendicular to the first surface S1), the bonding material 40 may have an annular shape along the edge of the light-transmitting member 30. By being annular, the discontinuous portions of the bonding material 40 are reduced, and the light-transmitting member 30 can be protected from external obstacles. Therefore, the strength and durability of the light-passing portion of the optical component mounting package 1 can be improved. Further, since the bonding material 40 is continuous over the entire circumference along the edge of the light-transmitting member 30, the airtightness of the opening 12 can be further improved.

[0026] As shown in FIG. 2A, when viewed in perspective from the front, the inner peripheral edge E1 of the bonding material 40 may overlap the edge E2 of the opening 12 or may be located outside the edge E2 of the opening 12. A partial range of the inner peripheral edge E1 of the bonding material 40 may overlap the edge E2 of the opening 12, and the remaining range of the inner peripheral edge E1 of the bonding material 40 may be located outside the edge E2 of the opening 12. According to this configuration, it is possible to reduce the covering of the opening 12 by the bonding material 40 and maintain the effective area through which the light of the opening 12 passes.

[0027] As shown in FIG. 1, the light-transmitting member 30 may be joined to the outer surface (third surface S13, FIG. 3A) of the wall body 13. That is, the second surface S2 (FIG. 3A) of the light-transmitting member 30 may be located on the side opposite to the mounting portion 11 with respect to the opening 12. With this configuration, the light-transmitting member 30 is less likely to protrude toward the mounting portion 11 side, and it is possible to make the mounting portion 11 more compact and to make the optical component mounting package 1 more compact. Further, the joining process of the light-transmitting member 30 becomes easier.

[0028] The optical component mounting package 1 of the present embodiment may further have one or more configurations selected from the following modification examples 1 to 7 added thereto.

[0029] (Modification examples 1 and 2) FIGS. 4A and 4B are cross-sectional views showing the periphery of the opening of the optical component mounting packages of modification example 1 and modification example 2, respectively. As shown in FIG. 4A, in a cross-section perpendicular to the first surface S1, the side surface S3 of the light-transmitting member 30 may have a convex shape. Further, as shown in FIG. 4B, in a cross-section perpendicular to the first surface S1, the side surface S3 of the light-transmitting member 30 may have a concave shape. The convex shape may be a shape in which the entire side surface S3 forms one convexity, or a shape in which a convex portion is included in a part of the side surface S3. The concave shape may be a shape in which the entire side surface S3 forms one recess, or a shape in which a recess is included in a part of the side surface S3. With this configuration, an anchor action of the side surface S3 acts on the joining material 40, and the light-transmitting member 30 and the wall body 13 can be joined more firmly. Therefore, the strength and durability of the light-passing portion of the optical component mounting package 1 are improved.

[0030] (Modification example 3) FIG. 5 is a cross-sectional view showing the periphery of the opening of the package for mounting an optical component according to Modification 3. As shown in this figure, the bonding material 40 may contain air bubbles 42 at the corner U1 between the side surface S3 of the translucent member 30 and the wall body 13. When stress is generated between the wall body 13 and the translucent member 30 due to the air bubbles 42 at the corner U1, it is possible to reduce the concentration of the stress at the corner U1. Therefore, the occurrence of breakage in the bonding material 40 due to stress is reduced, and the strength and durability of the light-passing portion of the optical component mounting package 1 can be further improved.

[0031] Here, the corner U1 means, for example, in the cross-section of FIG. 5, a region surrounded by a quadrilateral that includes the outer surfaces of the translucent member 30 and the wall body 13 as sides and has a length of one side equal to half the thickness of the translucent member 30. As shown in FIG. 5, the bonding material 40 may have air bubbles 43 in regions other than the corner U1. At this time, the air bubbles 42 located at the corner U1 may be larger than the air bubbles 43 located in regions other than the corner U1. Also, in the cross-section shown in FIG. 5, the density of the air bubbles 42 at the corner U1 in the bonding material 40 may be larger than the density of the air bubbles 43 in regions other than the corner U1. Thereby, while increasing the density of the bonding material 40, the stress at the corner U1 where stress is likely to concentrate can be dispersed. Thereby, the occurrence of breakage in the bonding material 40 due to stress is reduced, and the strength and durability of the light-passing portion of the optical component mounting package 1 can be further improved.

[0032] (Modification 4) Figs. 6A and 6B are a front view and a cross-sectional view showing the periphery of the opening of the optical component mounting package of Modification 4. As shown in Figs. 6A and 6B, when viewed in perspective from a direction perpendicular to the first surface S1, all of the outer contour lines of the light-transmitting member 30 may be located inward of the edge E2 of the opening 12. With this configuration, since the generation of stress between the wall body 13 and the light-transmitting member 30 can be reduced, the possibility of the light-transmitting member 30 being damaged can be reduced. Therefore, the strength and durability of the light-passing portion of the optical component mounting package 1 can be further improved. In addition, by making the light-transmitting member 30 smaller, the size of the optical component mounting package 1 can be reduced. Note that perspective viewing means virtually removing the object in front of the object to be viewed and viewing the object. Therefore, when the object in front of the object has a lens effect that distorts the image, the distorted image is different from the perspective image.

[0033] In Modification 4, as shown in Fig. 6B, the first surface S1 of the light-transmitting member 30 may be flush with the outer surface (third surface S13) of the wall body 13. Alternatively, the first surface S1 of the light-transmitting member 30 may be located outside the opening 12 or may be located inside the opening 12. In other words, the first surface S1 of the light-transmitting member 30 may be located outside the position flush with the outer surface (third surface S13) of the wall body 13 or may be located inward (closer to the mounting portion 11).

[0034] Furthermore, in Modification 4, the bonding material 40 may not be located on the first surface S1 of the light-transmitting member 30 or may be located on the first surface S1.

[0035] FIG. 7 is an explanatory diagram showing an example of a method for joining a translucent member in Modification 4. In Modification 4, the translucent member 30 may be joined to the wall body 13 by a series of steps including a pre-sintering step J1, a transfer step J2, and a main sintering step J3. In the pre-sintering step J1, a substrate 61 made of a material to which the low-melting glass hardly adheres (such as aluminum nitride) is prepared. Then, the translucent member 30 and the joining material 40 before melting are arranged on the substrate 61. The joining material 40 before melting is, for example, in powder form and is arranged so as to surround the translucent member 30 along the side surface S3 of the translucent member 30. Further, in the pre-sintering step J1, the joining material 40 is melted by heating, and then, the joining material 40 is cured in a state of being fixed to the translucent member 30 by cooling. The heating in the pre-sintering step J1 may be heating in which the joining material 40 is not completely melted. In the transfer step J2, the translucent member 30 and the joining material 40 are separated from the substrate 61 and transferred to the wall body 13. The translucent member 30 is aligned with the opening 12. In the main sintering step J3, with the aligned translucent member 30 supported by the jig K1, the joining material 40 is melted by heating. By melting, the joining material 40 coalesces and becomes a single mass, and while tightening the translucent member 30 from the surroundings so that the surface area becomes small by exerting a strong surface tension, the joining material 40 makes surface contact with the wall body 13. Here, by appropriately adjusting the amount of the joining material 40, a part of the joining material 40 contacts the second surface S2 of the translucent member 30. Then, by being cooled, the joining material 40 is cured, and the translucent member 30 smaller than the opening 12 can be joined to the wall body 13.

[0036] (Modification 5) FIGS. 8A and 8B are a front view showing the translucent member of the package for mounting an optical component in Modification 5 and a cross-sectional view showing the periphery of the opening. As shown in Modification 5, the translucent member 30 may have a groove 34 located at a portion of the second surface S2 that overlaps the wall body 13 in plan view and surrounding the opening 12 in plan view. Further, the joining material 40 may be located on the second surface S2 without exceeding the groove 34. The groove 34 can prevent the joining material 40 from being dammed up and spreading by wetting toward the center of the second surface S2, and an effective area of the translucent member 30 can be easily secured.

[0037] The groove 34 may be configured to surround the edge of the second surface S2, or may be located only in a partial region along the edge of the second surface S2.

[0038] (Modification Example 6) FIGS. 9A and 9B are a front view showing a light-transmitting member of the light component mounting package of Modification Example 6 and a cross-sectional view showing the periphery of the opening. As shown in Modification Example 6, the light-transmitting member 30 may have a non-oxidation film 35 that extends on the second surface S2. The non-oxidation film 35 reduces the affinity of the bonding material 40, and can reduce the bonding material 40 from wetting and spreading over a wide range of the second surface S2. Therefore, the effective area of the light-transmitting member 30 can be easily secured.

[0039] As shown in FIG. 9A, the non-oxidation film 35 may be located over the entire second surface S2, or may be located only in part such as near the edge. As the non-oxidation film 35, MgF2 (magnesium fluoride) or the like can be applied. The non-oxidation film 35 may also be used in combination with a film having an optical effect such as an AR (Anti-Reflection) coat.

[0040] (Modification Example 7) Modification Example 7 is an example in which a Pb (lead)-free low melting point glass is applied as the bonding material 40. Pb-free means that the lead content is 0.1 wt% or less (RoHS (Restriction of the use of certain hazardous substances in electrical and electronic equipment) regulations). As the Pb-free low melting point glass, borosilicate glass, barium borosilicate glass, zinc borate glass, barium borate glass, high silica glass, aluminophosphate glass, phosphate glass, zinc phosphate glass, alkali glass, bismuth silicate glass, bismuth borosilicate salt glass, bismuth zinc borate glass, etc. can be applied. The Pb-free low melting point glass reduces the affinity between the bonding material 40 and the light-transmitting member 30, and can reduce the bonding material 40 from wetting and spreading over a wide range of the second surface S2. Therefore, it becomes easy to secure the effective area of the light-transmitting member 30.

[0041] (Modification Examples 8 and 9) Figures 10A and 10B are cross-sectional views showing the periphery of the opening of the package for mounting optical components in Modification Example 8 and Modification Example 9, respectively. As shown in Figures 10A and 10B, the second surface S2 may include a first portion S2-1 connected to the side surface S3 and a second portion S2-2 closer to the center than the first portion S2-1. And in a cross-section perpendicular to the first surface S1, the first portion S2-1 may be inclined in a direction approaching the center of the second surface S2 as it advances in the direction from the first surface S1 to the second surface S2. In the above cross-section, the inclination angle of the first portion S2-1 (the angle of the acute angle θ formed by the extension line of the first surface S1 and the extension line of the first portion S2-1) may be less than 60 degrees or may be less than 45 degrees.

[0042] The bonding material 40 may be in contact with the entire area of the first portion S2-1 in the above cross-section (Figure 10A), or may be in contact with a part of the first portion S2-1 (Figure 10B). Also with this configuration, the anchor action of the side surface S3 acts on the bonding material 40, and the translucent member 30 and the wall body 13 can be bonded more firmly. Therefore, the strength and durability of the light-passing portion of the package 1 for mounting optical components are improved.

[0043] As shown in Figure 10B, the bonding material 40 may protrude in the thickness direction of the bonding material 40 (the direction perpendicular to the first surface S1) from the second surface S2 of the translucent member 30. The protruding portion of the bonding material 40 can protect the translucent member 30 from external obstacles. Therefore, the strength of the light-passing portion of the package 1 for mounting optical components can be further improved.

[0044] <Optical Device> As shown in FIG. 1, the optical device 100 of this embodiment includes a package 1 for mounting optical components and an optical component 50 mounted on the package 1 for mounting optical components. The optical component 50 is a light-emitting element such as a light-emitting diode or a laser diode, a light-receiving element such as a photodiode, or an optical element such as a lens, a mirror, or a diffraction grating. A plurality of and a plurality of types of optical components 50 may be mounted on the mounting portion 11. The optical device 100 further has electronic components, and the electronic components may be mounted on the mounting portion 11 in addition to the optical components 50. The optical component 50 exchanges light with the outside of the optical device 100 through the opening 12 and the light-transmitting member 30.

[0045] According to the optical device 100 of this embodiment, the intensity of the portion through which light passes can be improved by the action of the above-described package 1 for mounting optical components.

[0046] The package 1 for mounting optical components and the optical device 100 of this embodiment have been described above. However, the package for mounting optical components and the optical device of the present disclosure are not limited to the above embodiment. For example, the opening 12 may be in the lid body 20 instead of the base body 10. In this case, a part of the lid body 20 becomes a wall body having the opening 12. Further, the package for mounting optical components may have a plurality of openings and a plurality of light-transmitting members. Further, the light-transmitting member may be configured to be joined to the inner surface of the wall body (the surface closer to the mounting portion). In the above description, with reference to a cross section perpendicular to the first surface S1, some specific structures included in the cross section are shown. However, the specific structure does not appear only in one cross section perpendicular to the first surface S1, and may appear in all cross sections perpendicular to the first surface S1 and passing through the light-transmitting member 30 and the opening 12, or may appear except for a part of the range of cross sections. The wider the range having the above specific structure, the more effects are exhibited by the specific structure.

Industrial Applicability

[0047] The present disclosure can be used for packages for mounting optical components and optical devices.

Explanation of Reference Numerals

[0048] 1 Package for mounting optical components 10 Substrate 11 Mounting portion 12 Opening 13 Wall S13 Third surface 15 Accommodating portion 20 Cover 30 Translucent member 34 Groove 35 Non-oxidizing film 40 Bonding material 42 Air bubble S1 First surface S2 Second surface S3 Side surface E1 Inner periphery of the bonding material E2 Edge of the opening D1, D2 Thickness T11, T12, T21, T22 Length H1 First range H2 Second range

Claims

1. A mounting part on which an optical component is mounted, A wall body having an opening, A light-transmitting member covering the opening, An adhesive for joining the light-transmitting member to the wall body, Comprising, The light-transmitting member has a first surface facing the opening or located within the opening, a second surface located on the opposite side of the first surface, and a side surface located between the first surface and the second surface, The adhesive is a low-melting glass and is in contact with the wall body, the side surface, and the second surface, When viewed through from a direction perpendicular to the first surface, all of the outer contour lines of the light-transmitting member are located inward of the edge of the opening, A package for mounting an optical component.

2. The thickness of the adhesive is greater than the thickness of the light-transmitting member, The package for mounting an optical component according to Claim 1.

3. The adhesive protrudes beyond the second surface, The package for mounting an optical component according to Claim 1 or Claim 2.

4. In a cross-section perpendicular to the first surface, the outer contour line of the adhesive includes a curve convex outward, The package for mounting an optical component according to Claim 1 or Claim 2.

5. The adhesive has an annular shape along the edge of the light-transmitting member when viewed from a direction perpendicular to the first surface, The package for mounting an optical component according to Claim 1 or Claim 2.

6. In a cross-section perpendicular to the first surface, the length of the contact portion between the adhesive and the wall body is longer than the length of the contact portion between the adhesive and the side surface, The package for mounting an optical component according to Claim 1 or Claim 2.

7. The light-transmitting member is joined to the outer surface of the wall body, The package for mounting an optical component according to Claim 1 or Claim 2.

8. The adhesive is further in contact with the first surface, The package for mounting an optical component according to Claim 1.

9. In a cross-section perpendicular to the first surface, the length of the contact portion between the adhesive and the first surface is longer than the length of the contact portion between the adhesive and the second surface, The package for mounting an optical component according to Claim 8.

10. The adhesive is a lead-free low-melting glass, The package for mounting an optical component according to Claim 1 or Claim 2.

11. The light-transmitting member has a non-oxidizing film extending on the second surface, The package for mounting an optical component according to Claim 1 or Claim 2.

12. In a cross-section perpendicular to the first surface, the side surface has a convex shape or a concave shape, The package for mounting an optical component according to Claim 1 or Claim 2.

13. The second surface includes a first portion connected to the side surface, In a cross-section perpendicular to the first surface, the first portion is inclined in a direction approaching the center of the second surface as it progresses in the direction from the first surface to the second surface. The package for mounting an optical component according to claim 1 or claim 2.

14. The wall body is made of ceramic. The package for mounting an optical component according to claim 1 or claim 2.

15. The package for mounting an optical component according to claim 1 or claim 2, an optical component mounted on the package for mounting an optical component, and an optical device comprising the same.

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