US20110310471A1 - System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing - Google Patents
System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing Download PDFInfo
- Publication number
- US20110310471A1 US20110310471A1 US13/220,495 US201113220495A US2011310471A1 US 20110310471 A1 US20110310471 A1 US 20110310471A1 US 201113220495 A US201113220495 A US 201113220495A US 2011310471 A1 US2011310471 A1 US 2011310471A1
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- United States
- Prior art keywords
- light
- light beam
- lens
- adhesives
- shaping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000007493 shaping process Methods 0.000 title claims abstract description 13
- 239000000853 adhesive Substances 0.000 title abstract description 19
- 238000000034 method Methods 0.000 title abstract description 19
- 230000001070 adhesive effect Effects 0.000 title abstract description 18
- 238000004519 manufacturing process Methods 0.000 title description 6
- 238000001723 curing Methods 0.000 abstract description 8
- 239000003292 glue Substances 0.000 abstract description 5
- 238000003848 UV Light-Curing Methods 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 description 9
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
- G02B27/0966—Cylindrical lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
- G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0095—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ultraviolet radiation
Definitions
- the present invention relates in general to curing adhesives and, in particular, to an improved system, method, and apparatus for ultraviolet curing of adhesives with light beam shaping.
- HSA assembly utilizes a liquid or gel adhesive during the fabrication process to join some of the components.
- small dots of glue are used to attach the integrated lead suspension (ILS) to the actuator comb in order to improve the dynamics of the disk drive.
- ILS integrated lead suspension
- the assembly process typically utilizes “oven flood UV curing” to set the liquid glue dots, which comprises indiscriminately flooding an entire array of the assemblies with UV light.
- Embodiments of a system, method, and apparatus for curing of adhesives with light beam shaping are disclosed.
- the invention may comprise a UV-spot curing process that focuses a limited amount of UV light onto a target area, such as glue dots.
- a focusing lens may be used to direct the UV light beam to the target area.
- the target areas have different geometrical shapes, and the UV light is advantageously concentrated in a more efficient manner.
- beam-shaping optics or lenses are used to facilitate re-shaping and re-defining the UV-light beam.
- the UV beam may be defined and limited to a rectangular spot to improve the spot process quality and efficiency.
- Utilizing beam-shaping optics to shape and define a focused light beam in glue dot curing processes enhances the quality efficiency and effectiveness of the manufacturing process, as well as the efficiency in utilizing UV power.
- FIG. 1 is a schematic isometric view of one embodiment of a light and lens assembly constructed in accordance with the invention
- FIG. 2 is an isometric view of one embodiment of adhesive-joined assembly that was cured by the light and lens assembly of FIG. 1 and is constructed in accordance with the invention
- FIG. 3 is a schematic diagram of one embodiment of a disk drive constructed in accordance with the invention.
- FIG. 4 is a high level flow diagram of one embodiment of a method constructed in accordance with the invention.
- one embodiment of the invention comprises a system for shaping a light beam, such as ultraviolet (UV) light.
- the system includes a light source 11 for emitting light 13 .
- a light guide 15 having an inlet end 17 receives the light 13 from the light source 11 , and an outlet end 19 for emitting light 21 conveyed through the light guide 15 .
- the emitted light 21 may diverge from outlet end 19 .
- a lens assembly 31 is located adjacent to the outlet end 19 of the light guide 15 .
- the lens assembly 31 is provided for collimating the emitted light and forming a desired geometric-shaped light beam 33 (e.g., a rectangle, square, etc.).
- the lens assembly 31 comprises a plurality of lenses including, e.g., a spherical collimating lens 35 and at least one other lens element 37 , 39 (e.g., two shown).
- the spherical collimating lens 35 is located closest to the outlet end 19 .
- the light guide 15 may emit the diverging beam 21 such that it passes through the spherical collimating lens 35 prior to passing through the other lens elements 37 , 39 .
- the lens elements 37 , 39 may comprise a pair of cylindrical lenses.
- Each of the cylindrical lenses 37 , 39 may be provided with a convex leading surface 41 and a planar trailing surface 43 that are normal to an axis 45 of the emitted light.
- the cylindrical lenses 37 , 39 may be rotated and positioned 90 degrees out of phase relative to each other as illustrated.
- Each of the lenses that form the lens assembly 31 may be varied in distance relative to each other, the outlet end 19 , and the target struck by beam 33 to alter the pattern aspect ratio or other features of the invention.
- Position, focal length, and power of each lens may be varied to achieve a desired shape or size.
- the invention has many useful applications, such as a method of assembling hard disk drive components as shown in FIG. 2 .
- a plurality of integrated lead suspensions 51 may be assembled to an actuator comb 53 with adhesive drops 55 .
- the adhesive drops may be sized and shaped (e.g., circular, oval, etc.) according to the application, but must be cured to complete the assembly.
- the adhesive drops 55 are applied in a shaped pattern 57 (e.g., a rectangle).
- the adhesive drops 55 may be cured individually or simultaneously in their respective patterns 57 .
- the process begins as indicated and comprises positioning an actuator comb (e.g., arms) adjacent to an integrated lead suspension (ILS) (step 61 ); applying a plurality of adhesive drops in a pattern to the actuator comb and ILS such that that adhesive drops extend between the actuator comb and ILS to form an assembly (step 63 ); providing light from a light source and directing the light through a light guide having an outlet end for emitting light conveyed through the light guide (step 65 ); and passing the emitted light through a lens assembly located between the outlet end and the assembly for collimating the emitted light and forming a desired geometric-shaped light beam that is contoured to the shape of the pattern of adhesive drops to cure the adhesive drops and form a bond between the actuator comb and the ILS (step 67 ), before ending as indicated.
- an actuator comb e.g., arms
- ILS integrated lead suspension
- the method may comprise providing the lens assembly as a plurality of lenses, as a spherical collimating lens and at least one other lens element, such as a pair of cylindrical lenses.
- the collimating lens may be located adjacent to the outlet end such that the light guide emits a diverging beam that passes through the collimating lens prior to passing through said at least one other lens element.
- Each of the cylindrical lenses may be provided with a convex leading surface and a planar trailing surface that are normal to an axis of the emitted light.
- the method may further comprise rotating and positioning the cylindrical lenses 90 degrees out of phase relative to each other.
- the light source may emit UV light
- the desired geometric-shaped light beam may comprise a rectangular light beam.
- FIG. 3 a schematic drawing of one embodiment of an information storage system comprising a magnetic hard disk file or drive 111 for a computer system is shown and is constructed in accordance with the invention.
- Drive 111 has an outer housing or base 113 containing at least one magnetic disk 115 .
- Disk 115 is rotated by a spindle motor assembly having a central drive hub 117 .
- An actuator 121 comprises one or more parallel actuator arms 125 in the form of the comb 53 that is pivotally mounted to base 113 about a pivot assembly 123 .
- a controller 119 is also mounted to base 113 for selectively moving the comb of arms 125 relative to disk 115 .
- each arm 125 has extending from it at least one (e.g., eight shown in FIG. 2 ) cantilevered load beam and suspension 51 , and is assembled as described above.
- a magnetic read/write transducer or head is mounted on a slider 129 and secured to a flexure that is flexibly mounted to each suspension 51 .
- the read/write heads magnetically read data from and/or magnetically write data to disk 115 .
- the level of integration called the head gimbal assembly is the head and the slider 129 , which are mounted on suspension 51 .
- the slider 129 is usually bonded to the end of suspension 51 .
- the head is typically formed from ceramic or intermetallic materials and is pre-loaded against the surface of disk 115 by suspension 51 .
- Suspensions 127 have a spring-like quality which biases or urges the air bearing surface of the slider 129 against the disk 115 to enable the creation of the air bearing film between the slider 129 and disk surface.
- a voice coil 133 housed within a voice coil motor magnet assembly 134 is also mounted to arms 125 opposite the head gimbal assemblies. Movement of the actuator 121 (indicated by arrow 135 ) by controller 119 moves the head gimbal assemblies radially across tracks on the disk 115 until the heads settle on their respective target tracks.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
UV curing of adhesives with light beam shaping utilizes a spot curing process that focuses a limited amount of UV light onto a target area, such as glue dots. A focusing lens may be used to direct the UV light beam to the target area. The target areas have different geometrical shapes, and the UV light is advantageously concentrated in a more efficient manner. Beam-shaping optics or lenses are used to facilitate re-shaping and re-defining the UV-light beam. The UV beam may be defined and limited to a rectangular spot to improve the spot process quality and efficiency.
Description
- The present application is a divisional from U.S. patent application Ser. No. 11/946,956, filed Nov. 29, 2007, entitled “SYSTEM, METHOD AND APPARATUS FOR ULTRAVIOLET CURING OF ADHESIVES WITH LIGHT BEAM SHAPING IN DISK DRIVE MANUFACTURING,” naming inventors Iraj Kavosh and Russell D. Moates, which is incorporated by reference herein in its entirety.
- 1. Technical Field
- The present invention relates in general to curing adhesives and, in particular, to an improved system, method, and apparatus for ultraviolet curing of adhesives with light beam shaping.
- 2. Description of the Related Art
- In the prior art, some manufacturing materials are applied as fluids and then cured (i.e., set or hardened) with light or heat treatment processes. For example, some liquid adhesives are cured with ultraviolet (UV) light. These classes of materials are widely utilized in various types of industries.
- In the production of hard disk drives, one such application is the head stack assembly (HSA). HSA assembly utilizes a liquid or gel adhesive during the fabrication process to join some of the components. In one example, small dots of glue are used to attach the integrated lead suspension (ILS) to the actuator comb in order to improve the dynamics of the disk drive. The assembly process typically utilizes “oven flood UV curing” to set the liquid glue dots, which comprises indiscriminately flooding an entire array of the assemblies with UV light. Although this type of processing for UV-cured adhesives is workable, an improved solution that more selectively cures adhesives would be desirable.
- Embodiments of a system, method, and apparatus for curing of adhesives with light beam shaping are disclosed. The invention may comprise a UV-spot curing process that focuses a limited amount of UV light onto a target area, such as glue dots. A focusing lens may be used to direct the UV light beam to the target area. In some embodiments, the target areas have different geometrical shapes, and the UV light is advantageously concentrated in a more efficient manner.
- In one approach beam-shaping optics or lenses are used to facilitate re-shaping and re-defining the UV-light beam. For example, the UV beam may be defined and limited to a rectangular spot to improve the spot process quality and efficiency. Utilizing beam-shaping optics to shape and define a focused light beam in glue dot curing processes enhances the quality efficiency and effectiveness of the manufacturing process, as well as the efficiency in utilizing UV power.
- The foregoing and other objects and advantages of the present invention will be apparent to those skilled in the art, in view of the following detailed description of the present invention, taken in conjunction with the appended claims and the accompanying drawings.
- So that the manner in which the features and advantages of the present invention, which will become apparent, are attained and can be understood in more detail, more particular description of the invention briefly summarized above may be had by reference to the embodiments thereof that are illustrated in the appended drawings which form a part of this specification. It is to be noted, however, that the drawings illustrate only some embodiments of the invention and therefore are not to be considered limiting of its scope as the invention may admit to other equally effective embodiments.
-
FIG. 1 is a schematic isometric view of one embodiment of a light and lens assembly constructed in accordance with the invention; -
FIG. 2 is an isometric view of one embodiment of adhesive-joined assembly that was cured by the light and lens assembly ofFIG. 1 and is constructed in accordance with the invention; -
FIG. 3 is a schematic diagram of one embodiment of a disk drive constructed in accordance with the invention; and -
FIG. 4 is a high level flow diagram of one embodiment of a method constructed in accordance with the invention. - Referring to
FIGS. 1-4 , embodiments of a system, method and apparatus for curing adhesives with light beam shaping are disclosed. As schematically depicted inFIG. 1 , one embodiment of the invention comprises a system for shaping a light beam, such as ultraviolet (UV) light. The system includes alight source 11 for emitting light 13. Alight guide 15 having aninlet end 17 receives the light 13 from thelight source 11, and anoutlet end 19 for emittinglight 21 conveyed through thelight guide 15. As shown inFIG. 1 , the emittedlight 21 may diverge fromoutlet end 19. - A
lens assembly 31 is located adjacent to theoutlet end 19 of thelight guide 15. Thelens assembly 31 is provided for collimating the emitted light and forming a desired geometric-shaped light beam 33 (e.g., a rectangle, square, etc.). Thelens assembly 31 comprises a plurality of lenses including, e.g., a spherical collimating lens 35 and at least oneother lens element 37, 39 (e.g., two shown). The spherical collimating lens 35 is located closest to theoutlet end 19. Thelight guide 15 may emit thediverging beam 21 such that it passes through the spherical collimating lens 35 prior to passing through theother lens elements - Again as shown in
FIG. 1 , thelens elements cylindrical lenses convex leading surface 41 and a planartrailing surface 43 that are normal to anaxis 45 of the emitted light. In addition, thecylindrical lenses lens assembly 31 may be varied in distance relative to each other, theoutlet end 19, and the target struck bybeam 33 to alter the pattern aspect ratio or other features of the invention. Position, focal length, and power of each lens may be varied to achieve a desired shape or size. - The invention has many useful applications, such as a method of assembling hard disk drive components as shown in
FIG. 2 . For example, a plurality of integrated lead suspensions 51 (ILS) may be assembled to anactuator comb 53 withadhesive drops 55. The adhesive drops may be sized and shaped (e.g., circular, oval, etc.) according to the application, but must be cured to complete the assembly. Typically, theadhesive drops 55 are applied in a shaped pattern 57 (e.g., a rectangle). Theadhesive drops 55 may be cured individually or simultaneously in theirrespective patterns 57. - In one embodiment of the method (
FIG. 4 ), the process begins as indicated and comprises positioning an actuator comb (e.g., arms) adjacent to an integrated lead suspension (ILS) (step 61); applying a plurality of adhesive drops in a pattern to the actuator comb and ILS such that that adhesive drops extend between the actuator comb and ILS to form an assembly (step 63); providing light from a light source and directing the light through a light guide having an outlet end for emitting light conveyed through the light guide (step 65); and passing the emitted light through a lens assembly located between the outlet end and the assembly for collimating the emitted light and forming a desired geometric-shaped light beam that is contoured to the shape of the pattern of adhesive drops to cure the adhesive drops and form a bond between the actuator comb and the ILS (step 67), before ending as indicated. - In other embodiments, the method may comprise providing the lens assembly as a plurality of lenses, as a spherical collimating lens and at least one other lens element, such as a pair of cylindrical lenses. The collimating lens may be located adjacent to the outlet end such that the light guide emits a diverging beam that passes through the collimating lens prior to passing through said at least one other lens element.
- Each of the cylindrical lenses may be provided with a convex leading surface and a planar trailing surface that are normal to an axis of the emitted light. The method may further comprise rotating and positioning the cylindrical lenses 90 degrees out of phase relative to each other. In addition, the light source may emit UV light, and the desired geometric-shaped light beam may comprise a rectangular light beam.
- Referring now to
FIG. 3 , a schematic drawing of one embodiment of an information storage system comprising a magnetic hard disk file ordrive 111 for a computer system is shown and is constructed in accordance with the invention. Drive 111 has an outer housing orbase 113 containing at least onemagnetic disk 115.Disk 115 is rotated by a spindle motor assembly having acentral drive hub 117. Anactuator 121 comprises one or moreparallel actuator arms 125 in the form of thecomb 53 that is pivotally mounted tobase 113 about apivot assembly 123. Acontroller 119 is also mounted tobase 113 for selectively moving the comb ofarms 125 relative todisk 115. - In the embodiment shown, each
arm 125 has extending from it at least one (e.g., eight shown inFIG. 2 ) cantilevered load beam andsuspension 51, and is assembled as described above. A magnetic read/write transducer or head is mounted on aslider 129 and secured to a flexure that is flexibly mounted to eachsuspension 51. The read/write heads magnetically read data from and/or magnetically write data todisk 115. The level of integration called the head gimbal assembly is the head and theslider 129, which are mounted onsuspension 51. Theslider 129 is usually bonded to the end ofsuspension 51. The head is typically formed from ceramic or intermetallic materials and is pre-loaded against the surface ofdisk 115 bysuspension 51. - Suspensions 127 have a spring-like quality which biases or urges the air bearing surface of the
slider 129 against thedisk 115 to enable the creation of the air bearing film between theslider 129 and disk surface. Avoice coil 133 housed within a voice coilmotor magnet assembly 134 is also mounted toarms 125 opposite the head gimbal assemblies. Movement of the actuator 121 (indicated by arrow 135) bycontroller 119 moves the head gimbal assemblies radially across tracks on thedisk 115 until the heads settle on their respective target tracks. - While the invention has been shown or described in only some of its forms, it should be apparent to those skilled in the art that it is not so limited, but is susceptible to various changes without departing from the scope of the invention.
Claims (8)
1. A system for shaping a light beam, comprising:
a light source for emitting light;
a light guide having an inlet end for receiving light from the light source, and an outlet end for emitting light conveyed through the light guide; and
a lens assembly located adjacent to the outlet end for collimating the emitted light and forming a desired geometric-shaped light beam.
2. A system according to claim 1 , wherein the lens assembly comprises a plurality of lenses.
3. A system according to claim 1 , wherein the lens assembly comprises a collimating lens and at least one other lens element.
4. A system according to claim 3 , wherein the collimating lens is located adjacent to the outlet end and light guide emits a diverging beam that passes through the collimating lens prior to passing through said at least one other lens element.
5. A system according to claim 1 , wherein the lens assembly comprises a collimating lens and a pair of cylindrical lenses.
6. A system according to claim 5 , wherein each of the cylindrical lenses has a convex leading surface and a planar trailing surface that are normal to an axis of the emitted light.
7. A system according to claim 5 , wherein the cylindrical lenses are rotated and positioned 90 degrees out of phase relative to each other.
8. A system according to claim 1 , wherein the light source emits UV light, and the desired geometric-shaped light beam is a rectangular light beam.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/220,495 US20110310471A1 (en) | 2007-11-29 | 2011-08-29 | System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/946,956 US8029637B2 (en) | 2007-11-29 | 2007-11-29 | System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing |
US13/220,495 US20110310471A1 (en) | 2007-11-29 | 2011-08-29 | System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/946,956 Division US8029637B2 (en) | 2007-11-29 | 2007-11-29 | System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing |
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US20110310471A1 true US20110310471A1 (en) | 2011-12-22 |
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US11/946,956 Expired - Fee Related US8029637B2 (en) | 2007-11-29 | 2007-11-29 | System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing |
US13/220,495 Abandoned US20110310471A1 (en) | 2007-11-29 | 2011-08-29 | System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing |
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US11/946,956 Expired - Fee Related US8029637B2 (en) | 2007-11-29 | 2007-11-29 | System, method and apparatus for ultraviolet curing of adhesives with light beam shaping in disk drive manufacturing |
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Cited By (4)
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CN106556933A (en) * | 2017-01-03 | 2017-04-05 | 哈尔滨工业大学 | It is a kind of can multidimensional adjustment laser beam sheet apparatus for shaping and method |
CN106842587A (en) * | 2015-12-04 | 2017-06-13 | 北京润和微光科技有限公司 | Diffraction optics method realizes that Gauss light is shaped as the superfine line style uniform light spots of superelevation length-width ratio |
KR20180051336A (en) * | 2016-11-08 | 2018-05-16 | 한국전자통신연구원 | Multi-wavelength transmission device using the cylindrical lens |
US10209443B2 (en) | 2016-11-08 | 2019-02-19 | Electronics And Telecommunications Research Institute | Multi-wavelength transmission apparatus using cylindrical lenses |
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US11536879B2 (en) * | 2018-07-30 | 2022-12-27 | IonQ, Inc. | Elliptical beam design using cylindrical optics |
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CN106842587A (en) * | 2015-12-04 | 2017-06-13 | 北京润和微光科技有限公司 | Diffraction optics method realizes that Gauss light is shaped as the superfine line style uniform light spots of superelevation length-width ratio |
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CN106556933B (en) * | 2017-01-03 | 2018-09-07 | 哈尔滨工业大学 | It is a kind of can multidimensional adjustment laser beam sheet apparatus for shaping and method |
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US8029637B2 (en) | 2011-10-04 |
US20090139652A1 (en) | 2009-06-04 |
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