ICALEO 2013 Paper #M201 (Dicing of Thin Si Wafers with a Picosecond Laser Ablation Process)

Dicing of Thin Si Wafers with a Picosecond Laser Ablation Process
Authors:
Christian Fornaroli, Fraunhofer ILT; Aachen Germany
Jens Holtkamp, Fraunhofer Ilt; Aachen
Arnold Gillner, Fraunhofer Ilt; Aachen
Presented at ICALEO 2013

These days common way to produce electrical components like LEDs or computer chips is a batch process. Therefore a lot of identical components are processed parallel on one big wafer and
eventually each chip has to be singulated. Mechanical sawing with diamond blades have been used for a long time but as the wafer material is
getting thinner and the chip size smaller, this classical process is replaced by laser based dicing processes. Esp...

ICALEO 2013 Paper #M101 (Micro Scale Laser Based Additive Manufacturing for Metals)

Micro Scale Laser Based Additive Manufacturing for Metals
Authors:
Maximilian Schniednharm, Chair for Laser Technology LLT; Aachen
Matthias Belting, Fraunhofer Institute for Laser Technology Ilt; Aachen
Rui Joao, Fraunhofer Institute for Laser Technology Ilt; Aachen
Wilheim Meiners, Fraunhofer Institute for Laser Technology Ilt; Aachen
Andreas Weisheit, Fraunhofer Institute for Laser Technology Ilt; Aachen
Presented at ICALEO 2013

TBA

ICALEO 2013 Paper #M1005 (Large Angle of Bragg Diffraction Using Interference Of Acoustic Wave Inside Acousto-Optic Deflector)

Large Angle of Bragg Diffraction Using Interference Of Acoustic Wave Inside Acousto-Optic Deflector
Authors:
Tiansi Wang, Creol, the College of Optics & Photonics, University of Central Florida, University of Central Florida; Orlando FL USA
Chong Zhang, Intel - Assembly & Test Technology Development; Chandler AZ USA
Islam Salama, Intel - Assembly & Test Technology Development; Chandler AZ USA
Aleksandar Aleksov, Intel Components Research; Chandler AZ USA
Aravinda Kar, Mechanical and Aeronautical Eng., and Mat. Sci. and Eng. Department, University of Central Florida; Orlando FL USA
Presented at ICALEO 2013

Abstract

The laser beam is ofte...

ICALEO 2013 Paper #M1004 (From Fs - Ns: Influence of the Pulse Duration Onto the Material Removal Rate and Machining Quality for Metals)

From Fs – Ns: Influence of the Pulse Duration Onto the Material Removal Rate and Machining Quality for Metals
Authors:
Benjamin Lauer, Bern University of Applied Sciences Engineering and Information Technology; Burgdorf Switzerland
Beat Jaeggi, Bern University of Applied Sciences Engineering and Information Technology; Burgdorf Switzerland
Marc Schmid, Bern University of Applied Sciences Engineering and Information Technology; Burgdorf Switzerland
Beat Neuenschwander, Bern University of Applied Sciences; Burgdorf Switzerland
Presented at ICALEO 2013

When high requirements concerning machining quality are demanded, ultra short laser pulses from a few 100f...

ICALEO 2013 Paper #M1002 (Experimental Investigation of Cfrp Ablation with Uv and N-Ir Nanosecond Lasers)

Experimental Investigation of Cfrp Ablation with Uv and N-Ir Nanosecond Lasers
Authors:
Yuji Sato, Joining and Welding Reserach Institute, Osaka University; Osaka Japan
Masahiro Tsukamoto, Joining and Welding Reserach Institute, Osaka University; Osaka Japan
Kenjiro Takahashi, Joining and Welding Reserach Institute, Osaka University; Osaka Japan
Shin-Ichiro Masuno, Joining and Welding Reserach Institute, Osaka University; Osaka Japan
Kazuki Nakai, Joining and Welding Reserach Institute, Osaka University; Osaka Japan
Tatsuya Nariyama, Kinki University; Osaka
Hitoshi Nakano, Kinki University; Osaka Japan
Presented at ICALEO 20...

ICALEO 2013 Paper #M1001 (Comparison Between Laser Technologies and Alternative Processes on Paint and Polymer Layer Removal on Composite Substrate)

Comparison Between Laser Technologies and Alternative Processes on Paint and Polymer Layer Removal on Composite Substrate
Authors:
Charly Loumena, Alphanov; Talence France
Anthony Kirsch, Alphanov; Talence France
Rainer Kling, Alphanov; Talence Cedex France
Presented at ICALEO 2013

The application of composites and in particular CFRP (Carbon Fiber Reinforced Polymer) is a booming market. This material tends to gradually replace metals and alloys in many fields such as automotive, renewable energies, and aerospace. Indeed, composite materials combine high mechanical performances, low weight and good corrosion resistance. However this highly technical material requires ...

ICALEO 2013 Paper #C103 (Additive Manufacturing In Micro Scale)

Additive Manufacturing In Micro Scale
Authors:
Christian Noelke, Laser Zentrum Hannover e.V.; Hannover Germany
Matthias Gieseke, Laser Zentrum Hannover e.V.; Hannover Germany
Stefan Kaierle, Laser Zentrum Hannover e.V.; Hannover Germany
Presented at ICALEO 2013

Additive manufacturing is getting increasingly attractive for industrial production of unique or small series parts. Since a lot industrial metals like titanium and aluminum are established in AM processes, increasing the resolution within these processes is the next challenge. The aim is not only the production of micro-sized parts or important details, there is also a request to achieve ready to use surface qu...

ICALEO 2013 Paper #906 (Study of Filler Metal Mixing and Its Implication on Weld Homogeneity of Laser-Hybrid and Laser Cold-Wire Welded Thick Austenitic Stainless Steel Joints)

Study of Filler Metal Mixing and Its Implication on Weld Homogeneity of Laser-Hybrid and Laser Cold-Wire Welded Thick Austenitic Stainless Steel Joints
Authors:
Miikka Karhu, VTT Technical Research Centre of Finland; Lappeenranta Finland
Veli Kujanpaaa, Vtt Technical Research Centre of Finland; Lappeenranta Finland
Andrey Gumenyuk, Bam - Federal Institute for Materials Research and Testing, Berlin, Germany; Berlin Germany
Marco Lammers, Bam - Federal Institute for Materials Research and Testing, Berlin, Germany; Berlin Germany
Presented at ICALEO 2013

Austenitic stainless steel AISI 316L grade base material with butt joint thicknesses of 10-15 mm and diffe...

ICALEO 2013 Paper #905 (Hybrid Laser Welding of Single Sided Fully Penetrated Fillet Welds)

Hybrid Laser Welding of Single Sided Fully Penetrated Fillet Welds
Authors:
Wojciech Suder, Cranfield University; Cranfield Great Britain
Josef Camilleri, Cranfield University; Cranfield Great Britain
Stewart Williams, Cranfield University; Cranfield Great Britain
Presented at ICALEO 2013

Fillet welds are inherent part of large structures in shipbuilding industry, where distortion is a major issue. Hybrid laser welding enables fully penetrated fillet welds to be achieved with a lower energy than arc-based welding processes. This has significant effect on increase of productivity, decrease of distortion and reduction of weight. To achieve defects-free welds with good fa...

ICALEO 2013 Paper #904 (Hybrid Laser Welding of Cladded Tubes.)

Hybrid Laser Welding of Cladded Tubes.
Authors:
Frederic Coste, PIMM-UMR 8006; Paris France
Presented at ICALEO 2013

The use of cladded pipe-lines with an inner layer of stainless steel or Nickel base alloys tends to increase for deep offshore pipe line applications. End users and certification code generally ask for conventional welding. This ensures an optimum quality on the inner side of the root pass and preserves the anti-corrosion property of the inner clad. However, this is obtained with a small thickness of the first pass and a low welding speed. Laser hybrid welding seems to be an attractive technique for increasing both the thickness of the root pass and the welding speed. Combinati...