Nd:YAG laser machining with multilevel resist kinoforms.

Area of Science:

• Optics and Photonics
• Materials Science
• Manufacturing Technology

Background:

• Laser micromachining is a critical process in various industries.
• Diffractive optical elements are essential for beam shaping and manipulation.
• Resist materials are commonly used in lithographic processes.

Purpose of the Study:

• To investigate the application of resist kinoforms for laser micromachining.
• To evaluate the performance of resist kinoforms in terms of diffraction efficiency and beam quality.
• To demonstrate the capability of resist kinoforms for precise material processing.

Main Methods:

• Fabrication of a 10-level resist kinoform using electron-beam lithography.
• Characterization of the kinoform's diffraction efficiency.
• Experimental demonstration of simultaneous drilling of multiple diffraction-limited holes in stainless steel using the kinoform.
• Demonstration of marking a silicon wafer with the kinoform.

Main Results:

• The fabricated 10-level resist kinoform achieved a diffraction efficiency of 68%.
• Nine diffraction-limited holes were successfully and simultaneously drilled in 0.10-mm-thick stainless steel.
• Effective marking of a silicon wafer was demonstrated using the resist kinoform.

Conclusions:

• Resist kinoforms are a viable and efficient tool for advanced laser micromachining applications.
• The demonstrated capability enables parallel processing, enhancing throughput in microfabrication.
• This technology holds potential for precision manufacturing in microelectronics and other fields.