Cutting quality study for QFN packages by Nd:YAG laser

Author

Li, Chen-Hao ; Tsai, Ming-Jong ; Yao, Sin-Min

Author_Institution

Graduate Sch. of Eng. Technol., Nat. Taiwan Sci. & Technol. Univ., Taipei, Taiwan

fYear

2005

fDate

10-12 July 2005

Firstpage

19

Lastpage

24

Abstract

This paper reports a laser cutting technology for QFN (quad flat no-lead) packages by Nd:YAG diode pumping solid-state laser system (DPSSL). To obtain the optimal combinatorial parameters for laser cutting process, the influence of each control factor on the cutting quality is investigated. From the experimental results, the cutting parameters for the optimal cutting quality are the frequency of 2 kHz, the cutting speed of 2 mm/sec and the driving current of 29 A. The systematic parameter-searching rules obtained by the proposed experimental method may provide a practical guide during the parameter selection for cutting QFN packages. It is expected to be useful in other application fields of laser system.

Keywords

integrated circuit packaging; laser beam cutting; semiconductor lasers; 2 kHz; 2 mm/s; 29 A; Nd:YAG laser; cutting quality; diode pumping solid-state laser system; laser cutting technology; quad flat no-lead packages; systematic parameter-searching rules; Diodes; Frequency; Laser applications; Laser beam cutting; Laser excitation; Optical control; Optimal control; Packaging; Pump lasers; Solid lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronics, 2005. ICM '05. IEEE International Conference on

Conference_Location

Taipei

Print_ISBN

0-7803-8998-0

Type

conf

DOI

10.1109/ICMECH.2005.1529220

Filename

1529220