WO2003081735A1 - Semiconductor laser beam device - Google Patents
Semiconductor laser beam device Download PDFInfo
- Publication number
- WO2003081735A1 WO2003081735A1 PCT/JP2003/003554 JP0303554W WO03081735A1 WO 2003081735 A1 WO2003081735 A1 WO 2003081735A1 JP 0303554 W JP0303554 W JP 0303554W WO 03081735 A1 WO03081735 A1 WO 03081735A1
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- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor laser
- heat sink
- laser device
- groove
- sink portion
- Prior art date
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Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- H01S5/02253—Out-coupling of light using lenses
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/191—Disposition
- H01L2924/19101—Disposition of discrete passive components
- H01L2924/19107—Disposition of discrete passive components off-chip wires
Definitions
- the present invention relates to a semiconductor laser device that can be used as a light source for an optical disk such as a CD, a CD-R / RW, a DVD, a DVD-R / RW, and a DVD-pull single-ray disk.
- the present invention relates to a semiconductor laser device provided with a small package suitable for a slim (thin) pickup for an optical disk, or a package thereof.
- the current half-height pickup uses a semiconductor laser device with a ⁇ 5.6 mm stem.
- a D-type stem with a part of the ⁇ 5.6 mm stem and an I-type stem with both parts are proposed.
- packages with a ⁇ 3.5 mm stem and a ⁇ 3.3 mm stem have been proposed (see the appearance shown in Fig. 13).
- These ⁇ 3.5 mm stems and ⁇ 3.3 mm stems have a ⁇ 5.6 mm stem package that is entirely reduced in size as shown in Fig. 13; The problem is that the size becomes smaller.
- Patent Document 1 and the like are known for increasing the volume of the heat sink portion, but these are semicircular and insufficient in volume.
- the object of the present invention is one of the following or a combination thereof. That is, to improve heat dissipation. Reduce the size of the package. Protect the device. Reduce the number of lead pins.
- the present invention is characterized in that a groove is formed in an axial direction of a cylindrical heat sink portion, and a semiconductor laser device is arranged on an inner wall surface of the groove.
- the volume of the heat sink can be increased, and the heat dissipation of the semiconductor laser device can be improved.
- the present invention provides a semiconductor laser device in which a semiconductor laser element is disposed in the heat sink portion of a package comprising a circular base portion and a heat sink portion, wherein the heat sink portion has a cylindrical shape concentric with the base portion.
- a groove is formed along the axial direction of the portion, and the semiconductor laser element is disposed on an inner wall surface of the groove.
- the number of parts and the number of assembling steps can be reduced because a conventional airtight structure using a cap is not employed.
- the area where the heat sink portion comes into contact with the outside air can be increased.
- the present invention is characterized in that the groove has a depth including a central axis of the cylindrical heat sink portion.
- the present invention is characterized in that the groove is formed in a shape that completely accommodates the semiconductor laser device.
- the wall functions as a device protecting function.
- the present invention is characterized in that the groove is formed in a shape that completely accommodates the semiconductor laser element and a wire bond line for the semiconductor laser element.
- the semiconductor laser element and the wire bond line can be protected by the side wall.
- the present invention is characterized in that the groove has walls located on both sides thereof extending to a position higher than the semiconductor laser device.
- this wall serves to protect the device.
- the present invention is characterized in that the groove is formed in a shape obtained by cutting out an arc surface of the heat sink portion in a range of 180 degrees or less in terms of a central angle.
- the surface located at the bottom of the groove is a flat surface parallel to the central axis of the cylinder, and the semiconductor laser element can be arranged on this flat surface.
- the present invention is characterized in that one end is provided with a lead pin penetrating the base portion, and one end of the lead pin is arranged in the groove.
- the wire bond wiring can be formed in the groove, the wiring can be surely protected by the heat sink.
- the present invention is characterized in that one end is provided with two lead pins penetrating the base portion, and one end of these two lead pins is arranged in the groove.
- the tip of the lead bin penetrating the base portion can be arranged in the groove, and wire bond wiring can be performed in the groove.
- the wiring to the element can be reliably protected by the heat sink. Further, the size of the package can be reduced.
- the present invention is characterized in that a tapered surface is formed on an outer peripheral portion of a distal end of the heat sink portion.
- the receiving portion of the laser device on the optical pickup side which is usually made of aluminum or the like, can be prevented from being cut off by the edge.
- the present invention is characterized in that the tip of the heat sink is formed in a spherical surface.
- the tip of the semiconductor laser device has the same form as the tip of the ballpoint pen, and it is easy to adjust the tilt when incorporating the semiconductor laser device into a pickup device or the like.
- the tip of the laser device is placed in the hemispherical cavity of the pickup device, and the lead bin side is adjusted in the X and Y directions so that the optical axis is at the optimum position. can do.
- the present invention is characterized in that the bottom surface of the heat sink portion is a flat surface.
- the package can be stably supported at the time of wire bonding work to a semiconductor laser device or the like.
- the present invention is characterized in that a flat optical element is added to the front end face of the heat sink.
- optical adjustment in an optical pickup, a transmitter for optical communication, and the like can be simplified.
- the present invention is characterized in that a spherical optical element is added to the front end face of the heat sink.
- the optical element provided separately from the semiconductor laser device is optically adjusted and provided integrally, the optical element is applied to an optical pickup, a transmitter for optical communication, an optical fiber module, and the like.
- the optical adjustment can be simplified.
- the present invention is characterized in that the base and the heat sink are made of the same metal.
- the base portion and the heat sink portion can be formed integrally.
- a method there is a method in which both are formed simultaneously by pressing a plate material or by cutting a column material.
- the present invention is characterized in that a groove having a depth that completely accommodates a semiconductor laser element is formed in a column-shaped heat sink portion, and the semiconductor laser element is arranged at the bottom of the groove.
- the element can be protected by the groove.
- the present invention includes: a semiconductor laser device; and a column-shaped heat sink having a flat surface for disposing the semiconductor laser device in parallel with an optical axis of the semiconductor laser device.
- the heat sink portion has a wall integrally provided on one side in the left-right direction with respect to the optical axis of the flat surface, and a top portion of the wall is provided with a wire for the semiconductor laser device and the semiconductor laser device. It is characterized in that the position is higher than the bond line.
- the volume or surface area for heat dissipation can be increased by the presence of the wall, and the heat dissipation can be improved.
- FIG. 1 shows a first embodiment of the present invention, wherein (a) is a perspective view, (b) is a front view, and (c) ) Is a plan view.
- FIG. 2 shows a second embodiment of the present invention, wherein (a) is a perspective view, (b) is a front view, and (c) is a plan view.
- FIG. 3 shows a third embodiment of the present invention, wherein (a) is a perspective view, (b) is a front view, and (c) is a plan view.
- FIG. 4 shows a fourth embodiment of the present invention, in which (a) is a partially cutaway side view, and (b) is a front view.
- FIG. 5 shows a fifth embodiment of the present invention, in which (a) is a plan view and (b) is a front view.
- FIG. 6 is a plan view showing a sixth embodiment of the present invention.
- FIG. 7 is a front view showing a seventh embodiment of the present invention.
- FIG. 8 is a perspective view showing an eighth embodiment of the present invention.
- FIG. 9 shows a ninth embodiment of the present invention, in which (a) is a perspective view, (b) is a front view, and (c) is a plan view.
- FIG. 10 shows a tenth embodiment of the present invention, in which (a) is a perspective view, (b) is a front view, and (c) is a plan view.
- FIG. 11 shows a first embodiment of the present invention, in which (a) is a perspective view, (b) is a front view, and (c) is a plan view.
- FIG. 12 is a characteristic diagram showing data of a reliability test.
- FIG. 13 is a partially cutaway perspective view showing a conventional example.
- FIG. 1 shows a first embodiment of a semiconductor laser device of the present invention, wherein FIG. 1 (a) is a perspective view, FIG. 1 (b) is a front view, and FIG. 1 (c) is a plan view.
- the semiconductor laser device 1 includes a stem type package 2.
- the package 2 includes a base 3 and a heat sink 4.
- the base 3 is made of a disc-shaped metal whose basic form is a disc having a diameter of 3.3 mm and a thickness of 1 mm.
- the heat sink 4 has a diameter of 2.9 mm and a length of 2. It consists of a columnar metal with a notch formed by cutting out a part of a 5 mm cylinder as a basic form.
- the base part 3 and the heat sink part 4 are arranged concentrically so that their centers are aligned when viewed from the front.
- the center X of the base portion 3 and the heat sink portion 4 is set so as to coincide with an optical axis X of a semiconductor element described later.
- the heat sink portion 4 has a front U-shape by forming a groove 5 extending in the central axis direction of the column so as to cross the upper and lower flat surfaces of the column.
- the groove 5 has an upper end width of 1.5 mm and a lower end width of 1.0 mm, and is formed in an upwardly expanding form.
- Groove 5 is the arc portion of the cylinder cut out by this groove 5 (the arc portion where the upper end of groove 5 is regarded as a chord) Force Converted to the center angle with respect to the central axis of the cylinder to an angle 0 smaller than 180 degrees It is formed so that it becomes.
- the angle 0 is set to an angle smaller than 90 degrees, but may be set to an angle larger than 90 degrees if the angle is 180 degrees or less.
- the groove 5 is formed such that its bottom surface is at a position deeper than the central axis X of the cylinder.
- the surface 6 located at the bottom of the groove 5 is a flat surface parallel to the central axis X of the cylinder, and the flat surface 6 is a surface on which a semiconductor laser element described later is arranged.
- the heat sink portion 4 has wall portions 7 integrally provided on both sides of the flat surface 6 (the side in the left-right direction with respect to the axis X). That is, left and right wall portions 7 A and 7 B are provided on the left and right of the groove 5 and higher than the flat surface 6 at the bottom of the groove 5. An element 9 described later is arranged between the walls 7A and 7B.
- the heatsink portion 4 has its base end integrated with the base portion 3.
- the base part 3 and the heat sink part 4 can be made as separate members, and both can be joined together by a connecting material such as solder to form the package 2, or they can be made as the same member and integrally molded to form the package 2. It can also be.
- the base portion 3 and the heat sink portion 4 are made of different members, it is preferable that the base portion 3 be made of copper or a copper-based alloy having a small thermal resistance, or iron or an iron-based alloy. Is preferably made of copper or a copper-based alloy having a small thermal resistance.
- the base portion 3 and the heat sink portion 4 are formed integrally, it is preferable that the base portion 3 and the heat sink portion 4 are made of copper or a copper-based alloy having a small thermal resistance.
- both can be formed simultaneously by pressing a plate material or by cutting a column material.
- the heat sink 4 has a tapered surface 8 formed on the outer periphery of the tip so that the tip is tapered. By forming such a tapered surface 8, it is possible to prevent the receiving portion of the laser device on the optical pickup side, which is usually made of aluminum or the like, from being cut off by the edge.
- the outer peripheral portion of the heat sink portion 4 is a curved surface including the left and right walls 7A and 7B and having an arc centered on the axis X
- the outer peripheral portion of the laser device on the optical pickup side has a curved surface.
- a semiconductor laser element 9 as a semiconductor element is arranged in the package section 2.
- the semiconductor laser element 9 is disposed on a mounting surface of the heat sink portion 4, in this example, a flat surface 6 forming an inner wall surface of the groove 5 via a submount 10. It is preferable to arrange the semiconductor laser element 9 such that its emission point is deviated toward the submount 10 side, that is, in the form of a junction down, from the viewpoint of improving heat dissipation.
- various types of semiconductor laser elements 9 can be used from an infrared type to an ultraviolet type.
- a red-type or blue-type semiconductor laser element which has a lower heat radiation characteristic than the infrared type and requires a good heat radiation environment, in that the heat radiation characteristic can be improved.
- the submount 10 is formed of a member having good heat dissipation properties, and for example, a semiconductor material such as silicon or aluminum nitride can be used.
- a semiconductor material such as silicon or aluminum nitride can be used.
- the semiconductor laser element 9 is arranged in the groove 5 and is sandwiched between the walls 7 A and 7 B, which are sufficiently higher than the height of the semiconductor laser element 9, this wall protects the element. Perform the function.
- the semiconductor laser device 1 includes a plurality of lead pins 11 A and 1 IB fixed to a package 2.
- the two lead pins 11 A and 1 IB are arranged so as to sandwich the center X of the base portion 3.
- One end of the lead pin 11A is joined to the base portion 3 by welding or the like, and is electrically connected to the base portion 3.
- One end of the other lead bin 11B is inserted into the through hole 12 of the base portion 3, and is fixed insulated from the base portion 3 by the insulating material 13 arranged in the through hole 12. I have.
- One end of the lead pin 11 B is located in the groove 5 through the base portion 3.
- One lead pin 11 A is connected to one electrode of the semiconductor laser device 9 via the base 3, the heat sink 4, the wire bond wire 14, and the like.
- the other lead pin 11 B is connected to the other electrode of the semiconductor laser device 9 via a wire bond line 15 connected to one end thereof, a wiring on the submount 10, and the like.
- Each of the wire bond wires 14, 15 is preferably arranged in the groove 5 so as not to protrude from the upper edge of the groove 5 in order to be protected by the side walls 7A, 7B. That is, the groove 5 is formed in a shape that completely accommodates the semiconductor laser element 9, the submount 10, and the respective wire bond wires 14, 15.
- the semiconductor laser device 1 is provided with a pair of triangular cutouts 16 A and 16 B for positioning and a square cutout 17 for direction indication in the base portion 3, as in the related art. .
- the semiconductor laser device 1 is in a completed state as shown in FIG. 1, and is used as a light source incorporated in an optical pickup device or the like. At this time, the heat sink
- this laser device 1 can be smoothly inserted into the mounting location. Further, by forming the tapered surface 8 at the tip end, it is possible to prevent the receiving portion of the laser device on the optical pickup side which is usually made of aluminum or the like from being cut off by the edge. Therefore, it is possible to prevent the adverse effect on the optical system caused by the metal powder generated by shaving by the edge.
- the flat surface on the heat sink portion 4 side of the base portion 3 functions as a reference surface for positioning.
- the volume of the heat sink portion 4 is 11.1 mm 3 , which is about 10 times as large as 1.1 mm 3 of the conventional type ( ⁇ 3.5 mm) shown in FIG. was able to increase.
- Total volume of package 2 (base 3 and heat sink 4 The total volume) was 20.7 mm 3 , which was approximately twice as large as 10.7 mm 3 of the conventional type shown in FIG.
- the volume ratio of the heat sink part 4 to the total volume of the package 2 is about 53% (11.1 / 20.7), which is about 10% (1.1 / 1) of the conventional type shown in Fig.13. It was able to increase about 5 times compared to 0.7). Therefore, the heat generated from the semiconductor laser element 9 can be effectively dissipated.
- the semiconductor laser device for DVD-R having the red semiconductor laser element has a temperature of 70 ° C.
- the results of a reliability test when a pulse test of 100 mW is performed in an environment are shown.
- the horizontal axis represents time, and the vertical axis represents operating current under APC (auto power control).
- APC auto power control
- the number of parts and the number of assembling steps can be reduced. Further, the area where the heat sink section 4 comes into contact with the outside air can be increased.
- the semiconductor laser device 1 shown in FIG. 1 does not include a light receiving element, a light receiving element for a front motor is separately provided from the laser device 1 in order to monitor the output of the semiconductor laser element 9. It is preferable to arrange them in
- the submount 10 is of a type with a built-in light-receiving element 18, and in order to extract the output, the number of lead bins is increased by one to three. Is a point.
- the base portion 3 is formed with one through hole 12 that is long enough in the lateral direction and large enough to allow the two lead pins 11 B and 11 C to penetrate.
- Two lead pins 11 B and 11 C are arranged in the hole 12 so as to be separated from each other such that one end thereof is located in the groove 5.
- These two lead pins 11 B and 11 C are insulated from each other by an insulating material 13 and are also insulated and fixed to the base 3.
- Re One end of one bin 11B is used for wiring to the semiconductor laser element 9 as in the previous embodiment, and another lead bin 11C is connected to the light receiving element 18 built in the submount 10.
- Used for The light receiving element 18 is a PIN-type light receiving element and has a two-terminal structure.
- the electrode (the back electrode in this example) connected to one terminal is electrically connected to the power S, the heat sink part 4, and the other electrode ( In this example, the front electrode is connected to the lead pin 11 C via a wire bond wire 19.
- the same operation and effect as those of the first embodiment can be obtained. Furthermore, even in the case of a semiconductor laser device with a built-in light receiving element, the tips of the lead bins 11 B and 11 C penetrating through the base portion 3 must be arranged in the groove 5 and wire-bonded in the groove 5. Therefore, the wiring for the light receiving element 18 can be reliably protected by the heat sink 4. Also, the size of the package 2 can be reduced.
- the same components as those in the embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
- the differences will be mainly described.
- the major difference from the first embodiment is that the end of the heat sink 4 is formed into a hemispherical curved surface 20 from the tapered surface 8.
- the semiconductor laser element 9 ⁇ submount 10 is arranged so as not to protrude forward from the curved surface 20.
- the tip of the semiconductor laser device 1 has the same form as the tip of a ball-point pen, and it is easy to adjust the tilt when incorporating the semiconductor laser device 1 into a pick-up device or the like.
- the tip of the laser device is placed in the hemispherical cavity of the pickup device, and the lead bin side is adjusted in the X and Y directions so that the optical axis is at the optimum position. can do.
- the position of the semiconductor laser element 9 can be changed from the state shown in FIG. 3 to a state in which it is slightly moved back and forth (for example, toward the base portion 3) along the axis X direction.
- the semiconductor laser element 9 can be arranged such that its light emission point is equidistant from the curved surface 20.
- the semiconductor laser element 9 is arranged so that the light emission point of the semiconductor laser element 9 is located at the center of the sphere. With this arrangement, the light emitting point of the semiconductor laser element 9 does not move during the tilt adjustment. As a result, adjustment work becomes easier.
- This third embodiment can be applied to the second embodiment and other embodiments described later.
- a major difference from the first embodiment is that the shape of the heat sink 4 is changed.
- the first change is that a tapered surface 21 inclined downward is formed at the tip of the flat surface 6 of the groove 5.
- the angle of the tapered surface 21 is set to be larger than half the angle of the vertical spread of the light of the semiconductor laser element 9. Since the vertical spread angle of the light of the semiconductor laser element 9 is usually about 30 degrees, the inclination angle of the tapered surface 21 can be set to 15 degrees or more, for example, 15 degrees to 20 degrees. Set to range angle.
- the length of the heat sink 4 is increased by forming a tapered surface 21 in front of the element. Easy to set. Therefore, the volume of the heat sink portion 4 can be increased, and the heat radiation area can be increased.
- the second change is that the bottom surface, which was the arc surface of the heat sink portion 5, is changed to a flat bottom surface 22.
- the bottom surface 22 is a flat surface parallel to the flat surface 6 of the groove 5 and has a larger area than the flat surface 6.
- the first and second changes may be made separately or simultaneously.
- This fourth embodiment can be applied to the second and third embodiments and other embodiments described later.
- the first change is that the tapered surface 8 provided at the end of the heat sink portion 4 is not formed, and the cylindrical shape is maintained, that is, the front end surface and the rear end surface of the heat sink portion 4 are the same. This is a point having a planar shape.
- the second change is that an optical element 23 is added to the tip of the heat sink 4.
- the optical element 23 has a flat plate shape, but it is sufficient that at least the surface on the heat sink section 4 side has a flat shape.
- a tapered surface corresponding to the tapered surface 8 may be formed on the surface of the optical element 23 opposite to the surface on the heat sink portion 4 side.
- the optical element 23 one selected from a hologram element, a quarter-wave plate, a polarizing plate, a plate lens and the like can be used. Since the optical element 23 provided separately from the semiconductor laser device is provided integrally, optical adjustment in an optical pickup, a transmitter for optical communication, and the like can be simplified.
- the first and second changes described above may be performed separately or simultaneously.
- This fifth embodiment can be applied to the second and fourth embodiments and other embodiments described later.
- FIG. 2 The same components as those in the embodiment shown in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted. The differences will be mainly described.
- the major difference from the second embodiment is that the shape of the heat sink portion 4 is changed and that an optical element 25 is added to the tip.
- the first change is that a recess for receiving the optical element 25 is provided at the tip of the groove 5 without forming the tapered surface 8 provided on the outside of the heat sink 4 at the tip of the heat sink portion 4 and keeping the cylindrical shape. It is a point.
- the spherical optical element 25 can be securely attached.
- the second change is that a spherical optical element 25 is added to the tip of the heat sink 4. Is a point.
- the optical element 25 is used for collimating or condensing light emitted from the semiconductor laser element 9.
- the element 25 is held in a recess provided at the tip of the heat sink 4 and is fixed by an adhesive or the like. Since the optical element 25 provided separately from the semiconductor laser device is optically adjusted and provided integrally, it can be applied to optical pickups, transmitters for optical communication, optical fiber modules, etc. In addition, the optical adjustment can be simplified.
- the first and second changes described above may be performed separately or simultaneously.
- This sixth embodiment can be applied to the first and fourth embodiments and other embodiments.
- the same components as those in the embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
- the differences will be mainly described.
- the major difference from the first embodiment is that the arc-shaped side surface shape of the heat sink 4 is changed to a multi-sided shape. When viewed from the front, the outer periphery of the heat sink portion 4 having the arc portion has been changed to a polygonal shape as viewed from the front. By changing to a polygon, chucking can be easily performed.
- the bottom surface, which was the arc surface of the heat sink portion 4 is a flat bottom surface 22 as in the fourth embodiment.
- the bottom surface 22 is a flat surface parallel to the flat surface 6 of the groove 5 and has a larger area than the flat surface 6. With the flat bottom surface 22 as described above, the package 2 can be stably supported at the time of wire bonding work to the semiconductor laser device 9 and the like.
- the corners of the surrounding surface are virtual cylinders (indicated by the dashed-dotted line C in Fig. 7) in order to increase the mounting stability. ).
- the central axis of the virtual cylinder C coincides with the axis X.
- This seventh embodiment can be applied to the second embodiment and other embodiments.
- FIG. 1 The same components as those in the embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.
- a major difference from the first embodiment is that the shapes of the base portion 3 and the heat sink portion 4 are changed.
- the first change is formed by the difference in the outer dimensions of the base portion 3 and the heat sink portion 4, and the step used as the positioning reference plane, that is, the outer periphery of the base portion 3 that protrudes from the periphery of the heat sink portion 4.
- the step used as the positioning reference plane that is, the outer periphery of the base portion 3 that protrudes from the periphery of the heat sink portion 4.
- the second change is that a part of the wall 7B of the heat sink 4 is removed and a flat surface 6B is provided in order to enhance the workability of wire bonding.
- the flat surface 6B is flush with the flat surface 6 of the groove 5, but may be a flat surface having a step with the flat surface 6 of the groove 5.
- the first and second changes may be made separately or simultaneously.
- This eighth embodiment can be applied to any of the second to seventh embodiments and other embodiments.
- FIG. 1 The same components as those in the embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. The differences will be mainly described.
- the major differences from the first embodiment are that dummy lead pins 11 D are provided to make them pin-compatible with general 3-pin devices, and that the left and right walls formed on the left and right of the groove 5 The point is that the wall 7B is formed only on one of the left and right sides of the flat surface 6 by removing one of 7A and 7B.
- the heat sink 4 has an L-shape when viewed from the front by removing one of the walls 7A and 7B.
- the semiconductor laser element 9 is arranged on the flat surface 6 forming the bottom surface of the groove 5, but the shape of the groove 5 can be regarded as a sector shape (V shape) as in this embodiment. In such a case, it can be considered that the semiconductor laser element 9 is disposed on one inner wall surface of the groove 5.
- the lead pin 11B is not completely housed in the groove 5, but is insulated and fixed to the base portion 3 with a part protruding from the groove 5.
- the dummy lead bin 11D has one end joined to the base portion 3 by welding or the like, and is fixed to the base portion 3 in an electrically conductive state.
- the lead pin 11D is arranged at a position that overlaps the heat sink portion 4 in a plan view when viewed from the axis X direction, similarly to the lead pin 11A.
- the lead pin 11D is arranged at the same position as a position where a lead bin for outputting a monitor signal is arranged in a general three-pin device. Therefore, the pin arrangement is compatible with the general three-pin device, and it is possible to manufacture using a common manufacturing device.
- the monitor signal output lead pins As in the case of the lead pins 11B, avoiding a planar overlap with the heat sink section 4. Is limited.
- the heat sink portion 4 can be installed in a wide range. That is, the heat sink portion 4, in this example, the wall portion 7B can be protruded and arranged in a range where the lead bin for outputting the monitor signal is normally located.
- the upper end position of the heat sink portion 4, which is usually the same position as the surface 6, can be arranged so as to protrude to a position higher than the light emitting point or the upper surface of the semiconductor laser element 9.
- the presence of the wall portion 7B protruding to a position higher than the light emitting point or the upper surface can increase the volume or surface area for heat radiation and improve heat radiation.
- This ninth embodiment can be applied to any of the second to eighth embodiments and other embodiments.
- FIG. 9 The same components as those in the embodiment shown in FIG. 9 are denoted by the same reference numerals, and the description thereof will be omitted.
- the description will focus on differences.
- the difference from the ninth embodiment is that the shape of the wall 7 of the heat sink 4 is changed. That is, the apex of the sharply angled wall 7 was chamfered to obtain a flat surface 7C. With such a configuration, the same effect as that of the ninth embodiment can be obtained, although the heat dissipation is slightly inferior to that of the ninth embodiment.
- an eleventh embodiment of the present invention will be described with reference to FIG. This embodiment is obtained by adding the embodiment shown in FIGS. 9 and 10 based on the embodiment shown in FIG. Therefore, the same components as those of the embodiment shown in FIGS. 8 to 10 are denoted by the same reference numerals.
- the base part 3 and the heat sink part 4 have the same diameter so that no step is formed between them.
- a portion of the columnar shape is cut out to form a heat sink portion 4, and the portion that is not cut out is a base portion 3.
- the base portion 3 and the heat sink portion 4 are formed into an integral cylindrical shape, and the step between them is eliminated, so that when the semiconductor laser device is moved and adjusted in the direction of the axis X, restrictions imposed by the step are reduced. Adjustment work becomes easier.
- the lead pin 11 B fixed to the base portion 3 by the insulating material 13 extends through the base portion 3 to above the flat surface 6B.
- the lead pin 11D has one end joined to the base 3 by welding or the like, and is fixed to the base 3 in an electrically conductive state.
- the lead pin 11D is arranged at a position overlapping with the heat sink section 4 when viewed from the axis X direction, similarly to the lead bin 11A.
- the lead pin 11D is arranged at the same position as the position where the lead bin for outputting one monitor signal is arranged in a general three-pin device. Therefore, the pin arrangement is compatible with general three-pin devices, and it is possible to manufacture using common manufacturing equipment.
- the wall 7A has a flat surface 7C with a chamfered top.
- a light emitting diode can be used as a semiconductor light emitting element instead of the semiconductor laser element 9.
- changes other than the above-described embodiment may be made as long as the gist of the present invention is not changed.
- the semiconductor laser device of the present invention can be used as a light source for optical disks such as CD, CD-R / RW, DVD, DVD-R / RW, and DVD pull-ray disks.
- optical disks such as CD, CD-R / RW, DVD, DVD-R / RW, and DVD pull-ray disks.
- it can be used for a semiconductor laser device provided with a small package suitable for a slim (thin) pickup for an optical disk.
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Semiconductor Lasers (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020047015374A KR100965946B1 (ko) | 2002-03-25 | 2003-03-24 | 반도체 레이저 장치 |
US10/503,938 US7280572B2 (en) | 2002-03-25 | 2003-03-24 | Semiconductor laser beam device |
US11/898,576 US7889770B2 (en) | 2002-03-25 | 2007-09-13 | Semiconductor laser device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-83661 | 2002-03-25 | ||
JP2002083661 | 2002-03-25 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/898,576 Continuation US7889770B2 (en) | 2002-03-25 | 2007-09-13 | Semiconductor laser device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003081735A1 true WO2003081735A1 (en) | 2003-10-02 |
Family
ID=28449187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/003554 WO2003081735A1 (en) | 2002-03-25 | 2003-03-24 | Semiconductor laser beam device |
Country Status (4)
Country | Link |
---|---|
US (2) | US7280572B2 (ja) |
KR (1) | KR100965946B1 (ja) |
CN (1) | CN1327581C (ja) |
WO (1) | WO2003081735A1 (ja) |
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US11923652B2 (en) | 2020-03-24 | 2024-03-05 | Shinko Electric Industries Co., Ltd. | Header for semiconductor package, and semiconductor package |
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US11070024B2 (en) | 2017-05-11 | 2021-07-20 | Sharp Kabushiki Kaisha | Semiconductor laser device |
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CN108390255A (zh) | 2018-02-22 | 2018-08-10 | 青岛海信宽带多媒体技术有限公司 | 光学次模块及光模块 |
US20220368102A1 (en) * | 2021-05-17 | 2022-11-17 | Cisco Technology, Inc. | Heatsinking in laser devices |
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Also Published As
Publication number | Publication date |
---|---|
US20080013576A1 (en) | 2008-01-17 |
US7889770B2 (en) | 2011-02-15 |
KR100965946B1 (ko) | 2010-06-24 |
CN1327581C (zh) | 2007-07-18 |
CN1643751A (zh) | 2005-07-20 |
KR20040093486A (ko) | 2004-11-05 |
US20050089070A1 (en) | 2005-04-28 |
US7280572B2 (en) | 2007-10-09 |
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