Laser drilling by high peak pulsed CO2 laser (LDHPCL)

Takeno, Shozui; Moriyasu, Masaharu; Hiramoto, Seigo

doi:10.2351/1.5058519

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…Laser drilling has been widely used in industry because of its high production rate, ability to rapidly vary hole size, ability to drill holes at shallow angle, and ability to drill traditionally hard to work materials such as ceramics and composite materials. Most laser drilling systems are based on CW or long pulse C02 and YAG laser systems [6,7,8]. Material removal with these lasers are mostly through melt expulsion.…”

Section: Introductionmentioning

confidence: 99%

“…Precision micromachining on metals, however, still has not been realized because of the problems of large dimensional error and large hole taper [5,6,7], in addition to the formation of recast layer and heat affected zone. Although trepanning technique has been applied to improve the accuracy of laser micro drilling, its hole aspect ratio was mostly limited to less than 1 : 1.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Precision micro drilling with copper vapor lasers

Chang¹,

Martinez²,

Warner³

et al. 1994

International Congress on Applications of Lasers &Amp; Electro-Optics

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Thisisa preprint of apaper intended forpublication in a jonrnalor proceedings Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author. , This document was prepared as an account of work'&onsored by an agency of ' the United States Government. Neither the United States Government nor the university of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not n d y constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Precision micro drilling with copper vapor lasers

Chang¹,

Martinez²,

Warner³

et al. 1994

International Congress on Applications of Lasers &Amp; Electro-Optics

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5kV/50A/2MHz High Voltage Inverter for Gas Discharge Laser without Step-up Transformer

寛康

明彦

2007

IEEJ Trans. IA

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Highly Reliable CO2 Laser VIA Hole Drilling Technology by In-site Process Monitoring

Tanaka¹,

Kubo²,

Uchida³

et al. 2012

Journal of Japan Institute of Electronics Packaging

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For VIA hole drilling into printed-wiring boards using a CO 2 laser, one of the critical issues is some insu cient electrical conduction by the thin layer of residual resin, so-called smear, on the inner circuits a er the drilling. In general, smear over 2 μm thick cannot be removed by a chemical etching process. In this study, a novel in-situ process monitoring technology for laser drilling was developed to overcome this issue. During the laser drilling process, the amount of smear can be estimated by detecting the light emission generated from the reductive reaction of copper oxide on the inner circuits. Depending on the thickness of the smear, the number of laser pulses is controlled to keep it below 2 μm. is technology enables a VIA hole drilling system with high reliability.

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Laser drilling by high peak pulsed CO2 laser (LDHPCL)

Cited by 3 publications

References 3 publications

Precision micro drilling with copper vapor lasers

Precision micro drilling with copper vapor lasers

5kV/50A/2MHz High Voltage Inverter for Gas Discharge Laser without Step-up Transformer

Highly Reliable CO2 Laser VIA Hole Drilling Technology by In-site Process Monitoring

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