Substance joining method, substance joining device, joined body, and its manufacturing method

A joining method and joint body technology, applied in the direction of manufacturing tools, glass manufacturing equipment, welding equipment, etc., to achieve the effect of easy access and ease of difficulty

Inactive Publication Date: 2009-10-07
OSAKA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, since there is a limitation that the focus of the laser beam must be accurately formed on the contact portion of the two materials to be joined, there is a problem that the incident direction of the laser beam must be kept in a direction perpendicular to the joint surface.

Method used

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  • Substance joining method, substance joining device, joined body, and its manufacturing method
  • Substance joining method, substance joining device, joined body, and its manufacturing method
  • Substance joining method, substance joining device, joined body, and its manufacturing method

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no. 1 Embodiment approach

[0064] The method for joining the first substance of the present invention will be described below as the first embodiment; however, before describing the specific embodiments, the most important point in the joining method of this embodiment, that is, the principle of the filamentary region and its formation will be explained. illustrate.

[0065] When the ultra-short pulse laser beam with pulse width from femtosecond to picosecond level is incident on transparent materials such as glass, the laser beam basically has a Gaussian spatial intensity distribution, so in nonlinear media, the intensity of light is strong. The refractive index of the central part is higher than that of other parts, and the medium itself functions as a positive lens. Therefore, it is considered that a self-focusing action in which incident light is concentrated at one point occurs, and the beam diameter becomes extremely small after the ultrashort pulse laser beam propagates a finite distance in a tra...

no. 2 Embodiment approach

[0106] Next, a second embodiment of the joining method of the substance of the present invention will be described.

[0107] In the bonding method of the first substance of the present invention, as described above as the first embodiment, in adjusting the focusing conditions of the ultrashort pulse laser beam, the key point is to generate a filamentous region, and the second embodiment makes full use of the In the bonding method of the first substance of the present invention, there is an advantage in that a filamentary region is formed within a predetermined length along the optical axis direction of the laser beam, and the laser beam is obliquely incident on the bonding surface between the materials to be bonded, that is, the contact portion .

[0108] As mentioned above, in conventional ultrashort pulse laser beam welding, since it is necessary to accurately align the joint between the materials to be joined with the focal point of the laser beam, it is necessary to accura...

no. 3 Embodiment approach

[0115] In this embodiment, a description will be given of joining a substance made of a transparent material such as glass and a substance that reflects an ultrashort pulse laser beam, such as metal, using a nonlinear absorption phenomenon by an ultrashort pulse laser beam.

[0116] In the above-mentioned first and second embodiments of the method for joining substances of the present invention, it has been described that various substances can be joined by generating filamentous regions with an ultrashort pulse laser beam. Furthermore, it was discussed that since the filamentary region is formed over a predetermined length along the optical axis direction of the laser beam, it is a practically excellent joining method, which solves the problem of conventional ultrashort pulse laser beam welding, that is, continuous Difficulty in monitoring whether the focus of the laser beam is accurately formed at the interface of the materials to be joined.

[0117] On the other hand, accor...

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Abstract

A method for joining two substances and device for joining two substances are suited for practical use and significantly reduce the difficulty of accurately forming the focal formation position of an ultrashort pulse laser in a case of joining substances with use of a nonlinear absorption phenomenon, as well as a joined body and a manufacturing method for the for the same. Provided is a method for joining two substances by causing a nonlinear absorption phenomenon to occur with use of an ultrashort pulse laser beam. Among the two substances, a first substance that is positioned on a side on which the ultrashort pulse laser beam is incident is composed of a transparent material, and the two substances are joined by generating, at a joining face of the two substances, a filament area that is generated by a self-focusing effect of the ultrashort pulse laser beam in the first substance.

Description

technical field [0001] The present invention relates to a bonding method for bonding two substances using an ultrashort pulse laser beam, a substance bonding device used for the bonding, and a bonded body manufactured using the bonding method and a method for manufacturing the same. Background technique [0002] It is known that there is a second (1×10 -15 ) to picoseconds (1×10 -12 ) class ultrashort pulse laser (also called femtosecond laser), a method of joining two substances formed of transparent materials (Patent Document 1). [0003] The method is as follows: laminate and hold materials transparent to ultra-short pulse laser beams such as silicon glass, and irradiate them with ultra-short pulse laser beams adjusted to focus on their joints to generate laser beams. The resulting multiphoton absorption phenomenon melts at least one of the superimposed materials to be joined to perform joining. [0004] In this way, by using the multiphoton absorption phenomenon gener...

Claims

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Application Information

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IPC IPC(8): B23K26/20B23K26/04B29C65/16C03B23/203C03C27/02B23K26/00B23K26/32
CPCB29C65/7841B29C65/1616B29C66/43B29C66/90B29C66/9672C03C23/0025B29K2995/0026B29K2309/08B29K2305/10B29K2083/00B29C65/8207B29C66/7422B23K26/3226B29C66/1122B29C66/7465B23K26/3206B29C66/742C03C27/02B29C66/74281B29C65/7802B29C65/1654C03B23/203C03B23/20B23K26/0635B29K2305/02B29C65/1635B29C65/82B29C65/1674B29K2305/12B29C66/74283B23K26/3213C03C27/04B29C65/1629B29C65/1638B23K26/32B29C66/71B29C66/73112B29C66/73921B29C66/8322B29C66/836B29K2995/0027B23K26/0624B23K2103/02B23K2103/04B23K2103/05B23K2103/12B23K2103/18B23K2103/42B23K2103/50B23K2103/54Y10T428/31504B29K2033/08B29K2033/12B23K26/324B23K26/21
Inventor 伊东一良玉木隆幸
Owner OSAKA UNIV
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