Laser beam shaping for pitchfork profile
US7630147B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2007 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Jun 18, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/095
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus, systems, methods and devices of an optical system for producing a laser beam having pitchfork profile. The system includes a laser source providing an input Gaussian beam, refractive optical lenses for converting the input Gaussian beam into a super Gaussian beam. A focusing lens focuses the super Gaussian beam, where by diffraction effect after the focusing lens, the beam profile near a focal spot is a pitchfork shaped beam. In an embodiment, the refractive optical lenses are plano-aspheric lenses. The pitchfork shaped beam is produced by passing the input Gaussian beam through plano-aspheric lenses to produce the super Gaussian output beam, and passing the super Gaussian output beam through a focusing lens to produce the output beam having a pitchfork profile. In an embodiment, the pitchfork shaped beam is applied to laser microvias drilling in electronic packaging to produce residue free holes at reduced production cost with simplified procedures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.