Diffractive/refractive hybrid F-theta lens for laser drilling of multilayer printed circuit boards

2001 ◽  
Author(s):  
Keiji Fuse ◽  
Takeshi Okada ◽  
Keiji Ebata
Keyword(s):  
Printed Circuit Boards ◽  
Laser Drilling ◽  
Circuit Boards ◽  
Printed Circuit

scholarly journals The Role of Focus Position in Single Pulse Laser Drilling of Highly Reflecting Materials

2019 ◽  
Vol 2 (1) ◽  
pp. 61-68
Author(s):  
György Meszlényi ◽  
Enikő Bitay
Keyword(s):  
Pulse Laser ◽  
Laser Processing ◽  
Printed Circuit Boards ◽  
Focal Spot ◽  
Single Pulse ◽  
Laser Drilling ◽  
Focus Position ◽  
Circuit Boards ◽  
Printed Circuit

Abstract The laser processing of materials which are highly reflective at laser wavelengths is problematic. We have to take into account that only a small part of the energy is absorbed, the main part being reflected. In this article we examine the laser processing of highly reflective copper and silver at 1070 nm wavelength. In laser drilling of printed circuit boards it is necessary to drill copper layer as well. In highly reflecting materials we can drill smaller holes because of the low energy efficiency. Naturally in single pulse laser drilling the focus position plays a key role: at the focal spot of the laser beam smaller diameter holes are produced, further from the focal spot, higher diameter holes are produced.

Laser Drilling of Printed Circuit Boards

Circuit World ◽  
1984 ◽  
Vol 11 (1) ◽  
pp. 13-29 ◽  
Author(s):  
M.N. Watson
Keyword(s):  
Printed Circuit Boards ◽  
Laser Drilling ◽  
Circuit Boards ◽  
Printed Circuit

Laser drilling of microvias in epoxy-glass printed circuit boards

1990 ◽  
Vol 13 (4) ◽  
pp. 1055-1062 ◽  
Author(s):  
A. Kestenbaum ◽  
J.F. D'Amico ◽  
B.J. Blumenstock ◽  
M.A. DeAngelo
Keyword(s):  
Printed Circuit Boards ◽  
Laser Drilling ◽  
Circuit Boards ◽  
Printed Circuit

Laser drilling of epoxy-glass printed circuit boards

1997 ◽  
Author(s):  
Shozui Takeno ◽  
Masaharu Moriyasu ◽  
Masaki Kuzumoto
Keyword(s):  
Printed Circuit Boards ◽  
Laser Drilling ◽  
Circuit Boards ◽  
Printed Circuit
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