A laser-based cutting process for processing fragile crystalline blanks

Wafer cutting is a very effective and material-friendly process for separating individual wafer components. Wafers are square or circular thin discs which are obtained from mono or polycrystalline blanks and serve as a base plate for electrical components such as microchips. Due to the complex manufacturing process and the fragile shape of the wafer plates, laser cutting is an effective separation process.

When cutting wafers, it is important to keep the loss of the material to be processed as low as possible and at the same time to protect the material in the best possible way. If these two requirements are met, work can be carried out economically and the cutting yield is correspondingly high. Compared to mechanical wafer cutting processes such as sawing, the laser-assisted process minimizes microcracks at the cutting edges. In addition, laser-guided wafer cutting convinces with a narrower cutting width, whereby more surface area of the price-intensive wafer can be used while protecting the material at the same time. Furthermore, there is no tool wear, as the laser-based wafer cutting is contact-free. The risk of wafer breakage during the cutting process can thus be virtually eliminated.

Advantages of laser cutting

  • Gentle and precise processing of materials
  • Clean cut edges
  • Flexible guidance over the element to be machined
  • High reproducibility

For effective and clean laser guidance, high-quality optics are necessary, such as acylinders. Aspherical cylinders are characterized by a line in the focal point, i.e. there is not only one focal point in the focus. The result for wafer cutting is a fast and time-saving cutting process that delivers superior results. Lowest roughness values of the acylindrical surface lead to a perfectly focused line and guarantee best imaging results. asphericon’s production is rounded off by high-quality finishing layers from UV to the near infrared range.

Talk to us about customized aspherical cylinders for your wafer production or inform yourself about our BeamTuning product range and the components for shaping perfectly focused laser beams and thus optimal cutting edges.

Acylinders
Custom Acylinder
Custom Acylinder
Custom Acylinder x
Custom Acylinder

Based on a specially developed CNC grinding and polishing processes, asphericon manufactures acylinders with a surface form deviation (RMSi) of ≤ 0.5 µm.

Custom Acylinder at a glance

  • Customer-specific Acylinders
  • Available in different shapes: planoconvex, planoconcave, biconvex, biconcave
  • Outer shape can be userdefined
  • Excellent surface quality with roughness values as low as 5 Å
  • High-end coatings

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StockOptics Acylinder
StockOptics Acylinder
StockOptics Acylinder x
StockOptics Acylinder

Benefit from our attractive selection of aspheric cylinders with a RMSi surface form deviation smaller than 0.5 µm. a|Acylinders are made from high-index-glass and can be especially used for laser applications.

a|Acylinders at a glance

  • Outstanding surface form deviation of RMSi ≤ 0.5 µm
  • deal line-focus without spherical aberration
  • Available with 3 standard coatings/customized coatings on request
  • Off-the-shelf delivery for short lead times
  • RoHS compliance

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BeamTuning
BeamExpansion
BeamExpansion
BeamExpansion x
BeamExpansion

The asphericon system covers a wide wavelength spectrum. Design wavelengths of 355, 532, 632 and 780 to 1064 nm. An intelligent assembly concept saves time-consuming adjustments and ensures precision and flexibility. Discover the advantages of aspherical beam expansion for your application!

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BeamShaping
BeamShaping
BeamShaping x
BeamShaping

With a|TopShape and a|AiryShape asphericon expands the BeamTuning product range with two newly developed beam shapers. Based on aspheric optics, the two modular components enable uncomplicated transformation of Gaussian laser beams into different Top-Hat profiles. Thanks to the most precise production technology, the modules convince with quality at the highest level and can be used in many ways.

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Coating
Optical Coating
Optical Coating
Optical Coating x
Optical Coating

High-end optical coatings for each application – in outstanding quality, with reasonable delivery times and the reliable asphericon service. Equipped with state-of-the-art manufacturing and measuring technologies, our experienced team of technicians can turn your coatings ideas into reality.

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kontakt
Contact Person
Sales Team

+49 (0) 3641 3100 560
sales@asphericon.com