WO2016060069A1 - 半導体レーザー装置 - Google Patents
半導体レーザー装置 Download PDFInfo
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- WO2016060069A1 WO2016060069A1 PCT/JP2015/078690 JP2015078690W WO2016060069A1 WO 2016060069 A1 WO2016060069 A1 WO 2016060069A1 JP 2015078690 W JP2015078690 W JP 2015078690W WO 2016060069 A1 WO2016060069 A1 WO 2016060069A1
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- semiconductor laser
- stem
- laser device
- exposed
- external terminal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02476—Heat spreaders, i.e. improving heat flow between laser chip and heat dissipating elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/02—Containers; Seals
- H01L23/04—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls
- H01L23/043—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body
- H01L23/045—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body the other leads having an insulating passage through the base
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3677—Wire-like or pin-like cooling fins or heat sinks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0087—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/02208—Mountings; Housings characterised by the shape of the housings
- H01S5/02212—Can-type, e.g. TO-CAN housings with emission along or parallel to symmetry axis
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0225—Out-coupling of light
- H01S5/02257—Out-coupling of light using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/023—Mount members, e.g. sub-mount members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/023—Mount members, e.g. sub-mount members
- H01S5/0231—Stems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0233—Mounting configuration of laser chips
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0235—Method for mounting laser chips
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0239—Combinations of electrical or optical elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02469—Passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active cooling element like a TEC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0233—Mounting configuration of laser chips
- H01S5/02345—Wire-bonding
Definitions
- the present invention relates to a semiconductor laser device.
- Patent Document 1 A semiconductor laser device in which a semiconductor laser element is fixed to a stem and covered with a cap is known in Patent Document 1 and the like. Such a semiconductor laser device is mounted and used on an object to be mounted such as an image display device, a lighting fixture, and a vehicle lamp. In the semiconductor laser device described in Patent Document 1, laser light is emitted upward through a light transmitting member provided on the upper surface of the cap.
- an object of the present invention is to provide a semiconductor laser device whose heat dissipation property is enhanced.
- the semiconductor laser device is A semiconductor laser device mounted on a mounting target, Stem and A cap having a light transmitting member and attached to an upper surface of the stem to form a storage space between the stem and the stem; A semiconductor laser element disposed in the housing space and emitting a laser beam; At least a portion is embedded in the stem and has a feed member electrically connected to the semiconductor laser device,
- the power feeding member has an element side terminal exposed to the housing space and electrically connected to the semiconductor laser element, and an external terminal connected to an external power supply, The external terminal of the power supply member is exposed on the side surface or the upper surface of the stem, and the attachment surface attached to the mounting target is provided on the lower surface of the stem.
- the semiconductor laser device configured as described above, since the external terminal is exposed on the side surface or the upper surface of the stem, a large attachment surface can be secured on the lower surface of the stem. Since the heat transferred from the semiconductor laser element to the stem can be efficiently transferred to the mounting target via the mounting surface, it is possible to provide a semiconductor laser device with enhanced heat dissipation.
- a recess may be provided on the side surface of the stem, and the external terminal may be exposed to the recess. According to the semiconductor laser device configured as described above, since the external terminal is provided at a position drawn from the outer surface, damage to the external terminal can be suppressed.
- a plurality of the power supply members may be provided, and at least one of the external terminals may be exposed on the side surface of the stem at a position different from other external terminals when viewed from above.
- the power supply members are easily arranged to be separated from each other when viewed from above, and heat is less likely to be concentrated in a specific region, and thus the heat dissipation can be easily improved.
- the semiconductor laser element is provided on a heat sink fixed to the upper surface of the stem, and one end connected to the heat sink and the other end exposed to the side surface of the stem And an auxiliary conductor may be embedded in the stem.
- the heat generated by the semiconductor laser element and transmitted to the heat sink can be transmitted to the stem via the auxiliary conductor, and can be efficiently transmitted to the mounting target from the mounting surface of the stem.
- At least one of the side surface and the lower surface of the stem may be provided with a positioning portion for positioning the stem to be mounted. According to the semiconductor laser device of the above configuration, when the semiconductor laser device is attached to the mounting target, alignment can be easily performed.
- the external terminal may be located at the positioning portion. According to the semiconductor laser device of the above configuration, the connection work of the external terminal to the external power supply can be accurately performed by using the position where alignment is easy.
- the power feeding member may have a heat radiating portion extending along the attachment surface of the stem. According to the semiconductor laser device configured as described above, the heat generated from the semiconductor laser element and transferred to the power supply member can be efficiently transmitted to the mounting surface through the heat radiating portion.
- the portion of the feed member embedded in the stem and the external terminal may extend in the same straight line. According to the semiconductor laser device having the above configuration, the power supply member can be easily processed.
- FIG. 1 is a perspective view of a semiconductor laser device according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line II-II in FIG. It is a figure which shows the structure of a stem, and (a) is a III-III line sectional view in Drawing 2, (b) is a bb line sectional view in (a).
- It is a sectional view showing the semiconductor laser device concerning a second embodiment of the present invention.
- It is a sectional view showing the semiconductor laser device concerning a third embodiment of the present invention.
- It is a sectional view showing the semiconductor laser device concerning a third embodiment of the present invention.
- FIG. 1 is a perspective view of a semiconductor laser device 10 according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line II-II in FIG.
- the semiconductor laser device 10 according to the first embodiment has a stem 11, a cap 12, a semiconductor laser element 13, and a power feeding member 14.
- the semiconductor laser device 10 is mounted and used, for example, on a mounting target T such as an image display device, a lighting fixture, or a vehicle lamp.
- the cap 12 is attached to the upper surface of the stem 11.
- the cap 12 has a disk-shaped upper surface portion 15 and a cylindrical peripheral wall portion 16 extending downward from the periphery of the upper surface portion 15.
- the cap 12 is attached to the upper surface of the stem 11 to form a storage space S (see FIG. 2) between the cap 12 and the stem 11.
- the cap 12 has a light transmitting member 17 at the central portion of the upper surface portion 15.
- the light transmitting member 17 is formed of a light transmitting material.
- the light transmitting member 17 contains a phosphor.
- the light transmitting member 17 may be provided on a side surface portion or the like.
- the direction in which the semiconductor laser 13 is provided with respect to the stem 11 is upward, and the direction in which the stem 11 is provided with respect to the semiconductor laser 13 is The downward direction, which is orthogonal to the vertical direction, is called a side.
- the stem 11 has a mounting portion 21 having a circular shape in a plan view, and a positioning portion 22 having a rectangular shape in a plan view and projecting laterally from a part of the periphery of the mounting portion 21.
- the positioning unit 22 is used to position the semiconductor laser device 10 with respect to the mounting target T when the semiconductor laser device 10 is attached to the mounting target T.
- the positioning part 22 is formed in the shape fitted to the recessed part etc. which were formed in mounting object T.
- the top surface of the stem 11 is the mounting surface 11a.
- the lower surface of the mounting portion 21 and the lower surface of the positioning portion 22 are the mounting surface 11b.
- the mounting surface 11 a and the mounting surface 11 b are respectively flat surfaces.
- the cap 12, the semiconductor laser element 13, the submount 25, and the heat sink 26 are mounted on the mounting surface 11 a of the stem 11.
- the semiconductor laser element 13 is a semiconductor element that emits a laser beam by being supplied with power.
- the semiconductor laser element 13 is provided in the housing space S so as to irradiate the laser light toward the light transmitting member 17.
- the semiconductor laser 13 emits blue light.
- the phosphor contained in the light transmitting member 17 emits yellow light by the blue light.
- the semiconductor laser device 10 mixes blue light and yellow light and emits white light to the outside.
- the semiconductor laser device 13 is fixed to the submount 25.
- the submount 25 is attached to a heat sink 26 fixed to the mounting surface 11 a of the stem 11. As described above, the semiconductor laser device 13 is mounted on the mounting surface 11 a of the stem 11 via the submount 25 and the heat sink 26.
- the semiconductor laser device 10 is provided with a plurality of (two in this example) power feeding members 14.
- the power supply member 14 is a member made of conductive metal. Both ends of the power supply member 14 are an element side end 32 and an external terminal 33, respectively.
- An intermediate portion of the power supply member 14 is embedded in the stem 11.
- the outer periphery of a part of the power feeding member 14 embedded in the stem 11 is covered with an insulator 31 made of an insulating resin.
- the feeding member 14 is bent substantially at a right angle in the middle portion thereof.
- the element side terminal 32 and the external terminal 33 of the power feeding member 14 are exposed from the insulator 31.
- the element-side terminal 32 of the power supply member 14 protrudes from the mounting surface 11 a of the stem 11 and is exposed to the housing space S.
- the element side terminal 32 is disposed in the vicinity of the heat sink 26 on which the semiconductor laser element 13 is supported.
- the element side terminal 32 is electrically connected to the semiconductor laser element 13 by a bonding wire 35.
- the external terminal 33 of the power supply member 14 is exposed to the side surface of the stem 11. Specifically, the side surface of the positioning portion 22 of the stem 11 is provided with a recess 23 opened toward the side. The external terminal 33 is exposed to the recess 23. The external terminal 33 of the power supply member 14 exposed in the recess 23 is connected to an external power supply (not shown). Thus, power can be supplied from the external power source to the semiconductor laser device 13 through the power supply member 14.
- the external terminal 33 extends in the same straight line as the portion embedded in the stem 11 of the feeding member 14.
- FIG. 3 is a view showing the structure of the stem 11, where (a) is a cross-sectional view taken along line III-III in FIG. 2, and (b) is a cross-sectional view taken along line bb in (a).
- the plurality of feed members 14 are spaced apart so as not to overlap each other when viewed from above.
- the external terminals 33 of the power supply members 14 are exposed by a single recess 23 provided on the side surface of the stem 11. Since the external terminal 33 is provided at a position drawn from the outer surface, breakage of the external terminal 33 can be suppressed.
- the semiconductor laser device 10 can be easily miniaturized, and the external terminals 33 and the external power supply can be easily connected. . Furthermore, since the external terminal 33 is positioned at the positioning portion 22, it is easy to accurately connect the external terminal 33 to the external power supply by using the positioning portion 22 which facilitates alignment.
- the semiconductor laser device 10 also has an auxiliary conductor 41.
- the auxiliary conductor 41 is a metal member having a thermal conductivity better than that of a resin.
- the auxiliary conductor 41 electrically connects the semiconductor laser device 13 to an external ground terminal.
- One end of the auxiliary conductor 41 is connected to the heat sink 26, and the other end 41 b is exposed to the side surface of the stem 11.
- the other end 41 b of the auxiliary conductor 41 is exposed to the recess 23 formed in the positioning portion 22.
- the auxiliary conductor 41 is disposed between the two feed members 14 in parallel with the feed member 14.
- the middle portion of the auxiliary conductor 41 is bent substantially at right angles.
- the middle portion of the auxiliary conductor 41 is embedded in the stem 11.
- the portion of the auxiliary conductor 41 embedded in the stem 11 is covered with an insulator 42 made of an insulating resin.
- the semiconductor laser device 10 when power is supplied from an external power supply, the power is supplied to the semiconductor laser 13 through the power supply member 14. Then, blue laser light is emitted upward from the semiconductor laser element 13 and enters the light transmitting member 17. Then, yellow light is generated from the phosphor contained in the light transmitting member 17, blue light and yellow light are mixed, and white light is emitted to the outside.
- the semiconductor laser 13 when the semiconductor laser 13 emits laser light, the semiconductor laser 13 generates heat.
- the semiconductor laser device 10 in order to maintain the good light emission performance of the semiconductor laser device 13, it is required to quickly release the heat generated by the semiconductor laser device 13.
- the heat of the semiconductor laser device 13 is transmitted to the mounting target T via the submount 25, the heat sink 26, and the stem 11, and the semiconductor laser device 13 is cooled.
- the external terminal 33 of the feed member 14 is exposed to the side surface of the stem 11. Therefore, the mounting surface 11b can be largely secured on the lower surface of the stem 11, and the heat transmitted from the semiconductor laser element 13 to the stem 11 can be efficiently transmitted to the mounting target T via the mounting surface 11b. Therefore, it is possible to provide the semiconductor laser device 10 whose heat dissipation property is enhanced.
- the heat generated by the semiconductor laser element 13 is efficiently transmitted to the stem 11 through the metal feed member 14 having a thermal conductivity higher than that of the resin. be able to.
- the plurality of power supply members 14 are arranged so as not to overlap with each other when viewed from above. Therefore, the heat transferred from the semiconductor laser element 13 to the power supply member 14 can be easily transferred to the stem 11 uniformly as viewed from above, and the heat is less likely to be concentrated only in a specific region of the lower surface of the stem 11. Therefore, heat can be efficiently transmitted from the mounting surface 11b of the stem 11 to the mounting target T.
- a portion of the power feeding member 14 embedded in the stem 11 extends along the attachment surface 11 b of the stem 11 and also functions as a heat radiating portion 14 a.
- the heat generated by the semiconductor laser element 13 can be efficiently transmitted to a portion near the mounting surface 11 b of the stem 11 by the power feeding member 14, and the heat can be efficiently dissipated from the mounting surface 11 b of the stem 11 to the mounting target T.
- the semiconductor laser device 10 includes the auxiliary conductor 41.
- the heat generated by the semiconductor laser element 13 is efficiently transmitted to the stem 11 through the auxiliary conductor 41 in addition to the power feeding member 14, so the heat is efficiently dissipated from the mounting surface 11 b of the stem 11 to the mounting target T it can.
- the mounting surface 11b of the stem 11 is a flat surface, the mounting surface 11b can be easily adhered to the mounting target T, and the heat dissipation can be easily improved.
- the to-be-mounted surface of mounting object T is a curved surface or a level
- semiconductor laser devices 10A to 10C according to second to fourth embodiments which are partially different from the semiconductor laser device 10 according to the first embodiment, will be described.
- the same components as in the first embodiment are assigned the same reference numerals and descriptions thereof will be omitted.
- FIG. 4 is a view showing a semiconductor laser device 10A according to a second embodiment of the present invention, and is a cross-sectional view corresponding to FIG.
- the portions embedded in the stems 11 of the plurality of feed members 14 are arranged in the thickness direction of the stems 11.
- the external terminals 33 exposed in the recess 23 are arranged vertically in the recess 23. According to such a configuration, the width dimension of the positioning portion 22 of the stem 11 can be reduced as viewed from above to make the whole compact.
- FIG. 5 is a view showing a semiconductor laser device 10B according to a third embodiment of the present invention, and is a cross-sectional view corresponding to FIG. 3 (a). 6 is a cross-sectional view taken along the line XI-XI in FIG.
- two positioning portions 22 are provided on a stem 11B.
- the positioning portions 22 are provided at positions facing each other when viewed from above.
- Each positioning portion 22 is provided with a recess 23.
- the portions of the plurality of feed members 14 embedded in the stem 11B extend in opposite directions to each other, and the respective external terminals 33 are exposed at the concave portions 23 of the positioning portion 22, respectively.
- at least one external terminal 33 of the plurality of feed members 14 is exposed to the side surface of the stem 11B at a position different from the other external terminals 33 when viewed from above. ing.
- the semiconductor laser device 10B of the third embodiment at least one of the external terminals 33 of the plurality of power feeding members 14 is exposed to the side surface of the stem 11B at a position different from the other external terminals 33 when viewed from above. .
- the feed members 14 it is easy to arrange the feed members 14 so as to be separated from each other as viewed from above, and heat is less likely to be concentrated in a specific region, so it is easy to enhance the heat dissipation.
- the provision of the two positioning portions 22 makes it possible to position the mounting target T more reliably.
- the auxiliary conductor 41 is not provided, but the auxiliary conductor 41 may be provided. Further, the terminal exposed to the outside of the auxiliary conductor 41 may be exposed to the side surface of the stem 11B at the same position as the exposed portion of the external terminal 33 of the power feeding member 14, May be exposed to the side of the stem 11B at different positions.
- FIG. 7 is a view showing a semiconductor laser device 10C according to a fourth embodiment of the present invention, and is a view corresponding to FIG.
- the bending angle A at the bending portion in the middle portion of the feed member 14 is an obtuse angle.
- An intermediate portion of the power supply member 14 embedded in the stem 11 extends obliquely with respect to the mounting surface 11 b.
- the external terminal 33 is bent at an obtuse angle with respect to the middle portion, and extends parallel to the mounting surface 11b.
- the bending angle of the feed member 14 is an obtuse angle, bending of the feed member 14 can be facilitated.
- the intermediate portion 14a of the feed member 14 extends in a part of the radial direction of the opening provided in the mounting surface 11a into which the feed member 14 is inserted.
- a tapered portion 11c is provided.
- FIG. 8 is a view showing a semiconductor laser device 10D according to a fifth embodiment of the present invention, and is a view corresponding to FIG. As shown in FIG. 8, the external terminal 33 of the power supply member 14 may be exposed on the top surface of the stem 11D.
- the recess 23 is provided on the top surface of the stem 11D, and the external terminal 33 is exposed to the recess 23.
- a recess 23 is provided in a portion of the upper surface of the stem 11D which is not covered by the cap 12, and the external terminal 33 is exposed.
- the entire surface of the lower surface of the stem 11D is the mounting surface 11b. Therefore, the heat of the semiconductor laser device 13 can be efficiently transmitted to the mounting target T. Further, since the external terminal 33 is not exposed to the side, the semiconductor laser device 10D according to the present embodiment can be easily attached even if there is no attachment space in the left-right direction.
- the entire surface of the lower surface of the stem 11 is the mounting surface 11b, but only a part of the lower surface of the stem 11 may be the mounting surface 11b. Moreover, you may provide the attachment surface which touches the mounting object T besides the lower surface, such as a side surface of the stem 11.
- each embodiment demonstrated the example which made the whole lower surface of the stem 11 a flat surface
- this invention is not limited to this.
- a hole may be provided on the lower surface of the stem 11, and a convex portion provided on the mounting target T may be used to position the semiconductor laser device 10 relative to the mounting target T.
- an area other than the hole in the lower surface of the stem 11 can be used as the mounting surface 11 b.
- the lower surface of the stem 11 may be composed of two flat surfaces connected via a step.
- two flat surfaces function as the mounting surface 11b. While the heat of the semiconductor laser element 13 is efficiently transmitted to the mounting target T by the two flat surfaces, positioning can be performed on the mounting target T using the step.
- the shapes of the stem 11 and the cap 12 are not limited to the shapes in the above embodiment as long as the housing space S capable of housing the semiconductor laser element 13 can be formed on the mounting surface 11 a of the stem 11.
- a plurality of recessed portions 23 separated from each other may be provided in one positioning portion 22, and the external terminals 33 may be exposed from the respective recessed portions 23.
- the positioning portion 22 is not limited to the side surface of the stem 11, but may be provided on the lower surface.
- the semiconductor laser device 10 can be easily aligned with the mounting target T by inserting the positioning portion 22 provided on the lower surface of the stem 11 in the hole formed in the mounting target T.
- the shape of the positioning portion 22 of the stem 11 may be a step or a straight portion, or an unevenness or a curved portion corresponding to the mounting portion of the mounting target T, and is not limited to the shape in the above embodiment.
- the semiconductor laser device 13 may be directly mounted on the mounting surface 11 a of the stem 11.
- the semiconductor laser element 13 is not limited to one emitting blue light, and an element that emits laser light of a desired wavelength can be employed. Further, the phosphor contained in the light transmitting member 17 is not limited to one that receives blue light and emits yellow light, and a phosphor of any composition can be adopted. Furthermore, although the example which emitted white light was shown as a semiconductor laser apparatus, it is not restricted to this, You may comprise so that the light of a specific wavelength may be radiate
- the light transmitting member 17 may have a lens function of refracting the laser light from the semiconductor laser element 13.
- the number of semiconductor laser elements 13 is not limited to one, and a plurality of semiconductor laser elements 13 may be provided in the housing space S.
- a lens component or a phosphor may be provided in the housing space S.
- 10, 10A, 10B, 10C semiconductor laser device
- 11 stem
- 11b mounting surface
- 12 cap
- 13 semiconductor laser element
- 14 power feeding member
- 14a heat radiating portion
- 17 light transmitting member
- 22 positioning Part
- 23 recessed part
- 26 heat sink
- 32 element side terminal
- 33 external terminal
- 41 auxiliary conductor
- S accommodation space
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Abstract
Description
搭載対象に搭載される半導体レーザー装置であって、
ステムと、
透光部材を有し、前記ステムの上面に取り付けられて前記ステムとの間に収容空間を形成するキャップと、
前記収容空間内に配置され、レーザー光を出射する半導体レーザー素子と、
少なくとも一部が前記ステムに埋設され、前記半導体レーザー素子と導通する給電部材を有し、
前記給電部材は、前記収容空間に露出して前記半導体レーザー素子に電気的に接続された素子側端子と、外部電源と接続される外部端子と、を有し、
前記ステムの側面または上面に前記給電部材の前記外部端子が露出され、前記ステムの下面に搭載対象に取り付けられる取付面が設けられている。
上記構成の半導体レーザー装置によれば、上方から見て給電部材をそれぞれ離間するように配置しやすく、熱が特定の領域に集中しにくいので、放熱性を高めやすい。
上記構成の半導体レーザー装置によれば、半導体レーザー素子で生じてヒートシンクに伝えられた熱を、補助導体を介してステムに伝え、ステムの取付面から効率よく搭載対象に伝えることができる。
上記構成の半導体レーザー装置によれば、半導体レーザー装置を搭載対象に取り付けるときに、位置合わせをしやすい。
上記構成の半導体レーザー装置によれば、半導体レーザー素子から生じて給電部材に伝えられた熱を、放熱部を介して取付面へ効率よく伝えることができる。
まず、第一実施形態に係る半導体レーザー装置を説明する。
図1は、本発明の第一実施形態に係る半導体レーザー装置10の斜視図である。図2は、図1におけるII-II線断面図である。
図1及び図2に示すように、第一実施形態に係る半導体レーザー装置10は、ステム11と、キャップ12と、半導体レーザー素子13と、給電部材14とを有している。半導体レーザー装置10は、例えば、画像表示装置や照明器具、車両用灯具などの搭載対象Tに搭載されて用いられる。
本実施形態において、半導体レーザー素子13は青色光を出射する。この青色光によって、透光部材17に含まれる蛍光体は黄色光を発する。これにより、半導体レーザー装置10は、青色光と黄色光とを混色して、白色光を外部に出射する。
この外部端子33は、給電部材14のステム11に埋設された部位と同一の直線状に延びている。給電部材14を作製する際には、折り曲げ箇所が一か所であるため、加工が容易である。
図3(a)及び図3(b)に示すように、複数本の給電部材14は、上方から見て互いに重ならないように間隔をあけて配置されている。そして、これらの給電部材14の外部端子33は、ステム11の側面に設けられた単一の凹部23で露出されている。
外部端子33が外表面から引き込んだ位置に設けられているので、外部端子33の破損を抑制できる。また、単一の凹部23に複数の外部端子33が集中的に設けられているため、半導体レーザー装置10を小型化しやすく、また、外部端子33と外部電源とを容易に接続しやすくされている。
さらに、外部端子33が位置決め部22に位置されているので、位置合わせをしやすい位置決め部22を使って、外部端子33の外部電源への接続作業を正確に行いやすい。
第一実施形態に係る半導体レーザー装置10においては、上方から見て、給電部材14が互いに重ならないように配置されていたが、本発明はこれに限られない。
図4は、本発明の第二実施形態に係る半導体レーザー装置10Aを示す図であり、図2に対応する断面図である。
なお、上述した第一実施形態に係る半導体レーザー装置10においては、複数の外部端子33が単一の凹部23で露出された例を示したが、本発明はこれに限られない。
図5は、本発明の第三実施形態に係る半導体レーザー装置10Bを示す図であり、図3(a)に対応する断面図である。図6は、図5におけるXI-XI線断面図である。
このように、第三実施形態に係る半導体レーザー装置10Bでは、複数の給電部材14の少なくとも1つの外部端子33が上方から見て他の外部端子33とは異なる位置でステム11Bの側面に露出している。
上述した第一実施形態から第三実施形態では、給電部材14が直角に折り曲げられた形状である例を説明したが、本発明はこれに限られない。
図7は、本発明の第四実施形態に係る半導体レーザー装置10Cを示す図であり、図2に対応する図である。
図7に示すように、第四実施形態に係る半導体レーザー装置10Cでは、給電部材14の中間部分における屈曲部分での屈曲角度Aが鈍角とされている。給電部材14のうちステム11に埋設された中間部は取付面11bに対して傾いて延びている。また、外部端子33はこの中間部に対して鈍角に屈曲されて、取付面11bと平行に延びている。
上述した第一実施形態から第五実施形態では、給電部材14の外部端子33がステム11の側面に露出された例を説明したが、本発明はこれに限られない。
図8は、本発明の第五実施形態に係る半導体レーザー装置10Dを示す図であり、図2に対応する図である。
図8に示すように、給電部材14の外部端子33がステム11Dの上面に露出されていてもよい。本実施形態に係る半導体レーザー装置10Dにおいては、ステム11Dの上面に凹部23が設けられ、外部端子33がこの凹部23に露出されている。ステム11Dの上面のうち、キャップ12で覆われていない部位に、凹部23が設けられ、外部端子33が露出されている。
本実施形態に係る半導体レーザー装置10Dによれば、ステム11Dの下面の全面が取付面11bとされている。このため、半導体レーザー素子13の熱を効率よく搭載対象Tに伝えることができる。また、外部端子33が側方に露出しないので、左右方向に取付スペースがない場合であっても、本実施形態に係る半導体レーザー装置10Dを取り付けやすい。
なお、上記第一から第四実施形態では、ステム11の下面の全面を取付面11bとしたが、ステム11の下面の一部のみを取付面11bとしても良い。また、ステム11の側面など、下面以外にも搭載対象Tに接する取付面を設けても良い。
Claims (8)
- 搭載対象に搭載される半導体レーザー装置であって、
ステムと、
透光部材を有し、前記ステムの上面に取り付けられて前記ステムとの間に収容空間を形成するキャップと、
前記収容空間内に配置され、レーザー光を出射する半導体レーザー素子と、
少なくとも一部が前記ステムに埋設され、前記半導体レーザー素子と導通する給電部材を有し、
前記給電部材は、前記収容空間に露出して前記半導体レーザー素子に電気的に接続された素子側端子と、外部電源と接続される外部端子と、を有し、
前記ステムの側面または上面に前記給電部材の前記外部端子が露出され、前記ステムの下面に搭載対象に取り付けられる取付面が設けられている、半導体レーザー装置。 - 前記ステムの前記側面に凹部が設けられ、前記外部端子が前記凹部に露出している、請求項1に記載の半導体レーザー装置。
- 複数の前記給電部材が設けられ、少なくとも1つの前記外部端子が上方から見て他の前記外部端子とは異なる位置で前記ステムの前記側面に露出している、請求項1または2に記載半導体レーザー装置。
- 前記半導体レーザー素子は、前記ステムの前記上面に固定されたヒートシンクに設けられており、
前記ヒートシンクに接続された一端と、前記ステムの前記側面に露出された他端とを有する補助導体が前記ステムに埋設されている、請求項1から3のいずれか一項に記載の半導体レーザー装置。 - 前記ステムの前記側面および前記下面の少なくとも一方に、前記ステムを搭載対象に位置決めする位置決め部が設けられている、請求項1から4のいずれか一項に記載の半導体レーザー装置。
- 前記外部端子は前記位置決め部に位置している、請求項5に記載の半導体レーザー装置。
- 前記給電部材は、前記ステムの前記取付面に沿って延びる放熱部を有する、請求項1から6のいずれか一項に記載の半導体レーザー装置。
- 前記給電部材の前記ステムに埋設された部位と前記外部端子とが同一の直線状に延びている、請求項7に記載の半導体レーザー装置。
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JP2016554062A JPWO2016060069A1 (ja) | 2014-10-15 | 2015-10-08 | 半導体レーザー装置 |
US15/519,338 US9979154B2 (en) | 2014-10-15 | 2015-10-08 | Semiconductor laser device |
EP15851412.5A EP3208896A4 (en) | 2014-10-15 | 2015-10-08 | Semiconductor laser device |
CN201580055579.4A CN106797104B (zh) | 2014-10-15 | 2015-10-08 | 半导体激光装置 |
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US20170244217A1 (en) | 2017-08-24 |
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US9979154B2 (en) | 2018-05-22 |
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