{"id":19319,"date":"2023-11-24T10:44:50","date_gmt":"2023-11-24T01:44:50","guid":{"rendered":"https:\/\/futaku.co.jp\/?page_id=19319"},"modified":"2025-09-10T12:12:43","modified_gmt":"2025-09-10T03:12:43","slug":"femtolaser-en","status":"publish","type":"page","link":"https:\/\/futaku.co.jp\/en\/technology-en\/laser-en\/femtolaser-en\/","title":{"rendered":"Femtosecond-laser Process"},"content":{"rendered":"\n
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The femtosecond laser processing in FUTA-Q<\/h2>\n
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We have advanced our femtosecond laser processing technique since the introducing two and half years ago, through the processes of metals, resins, glass, silicon, and ceramics.
\n– The processing results can be observed on the spot.
\n– Material surface observation, element analysis, and dimension confirmation in nano order can be done on the spot.<\/p>\n\n<\/div>\n

\n\"\u30d5\u30a7\u30e0\u30c8\u79d2\u30ec\u30fc\u30b6\u30fc\u52a0\u5de5\u53d7\u8a17\"\/<\/div>\n<\/div>\n\n\n\n
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– Features –<\/h2>\n\n

– Ultra-short pulse laser process:
\u3000\u30001 femtosecond is one petaseconds.
\u3000\u3000(The light can travel only 0.3 \u03bcm in one femtosecond.)
– Minimum thermal effect to materials
– High precision work:
\u3000\u3000Working accuracy is submicrons to microns.<\/p>\n

\n
\"in<\/a>\n

in process<\/p>\n<\/div>\n<\/div>\n

\u00bb Comparison Table of Lasers(PDF)<\/a><\/p>\n\n<\/div>\n\n\n\n

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About femtosecond laser processing<\/h2>\n

\"\u30ec\u30fc\u30b6\u30fc\u52a0\u5de5\u6a5f\u306e\u6bd4\u8f03\"\/<\/p>\n<\/div>\n\n\n\n

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Comparison of Laser Processing Machines<\/h2>\n\n
Laser type<\/th>Continuous-wave laser<\/th>Ultra-short pulse laser<\/th><\/tr>\n
Laser wave-length<\/td>Near infrared<\/td>Near infrared – near ultraviolet<\/td><\/tr>\n
Laser pulse width<\/td>Continuous wave<\/td>Femtosecond – picosecond<\/td><\/tr>\n
Minimum process diameter<\/td>\u03a60.05mm<\/td>\u03c60.01mm<\/td><\/tr>\n
Maximum process depth<\/td>Several millimeters<\/td>0.1mm<\/td><\/tr>\n
Effect of condensing angle<\/td>About 5\u00b0 on one side<\/td>About 5\u00b0 on one side<\/td><\/tr>\n
Thermal effect to substrate<\/td>Giving a bad influence<\/td>Minimum influence<\/td><\/tr>\n<\/tbody><\/table>\n\n<\/div>\n\n\n\n
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Femto-second Laser processing for multilayer composite board\n<\/h2>\n\n\n\n
\n \n

multilayer composite board is processed by utilizing a characteristics of a femto-second laser processing.<\/p>\n

\n
\n
Micro
\u201cmahjong tiles\u201d<\/h5>\n\n <\/div>\n
\"mahjong<\/div>\n <\/div>\n
\n
\n \"mahjong\n <\/div>\n
\n \n \n \n \n \n \n \n \n
\u3010Specifications of femto-second laser\u3011<\/th>\n <\/tr>\n
Wave length<\/th>\n IR\/G\/UV<\/td>\n <\/tr>\n
Pulse width<\/th>\n 360 fs<\/td>\n <\/tr>\n
Frequency<\/th>\n 10 – 100 KHz<\/td>\n <\/tr>\n
Spot diameter<\/th>\n 10 \u03bcm<\/td>\n<\/tr>\n
Laser power<\/th>\n 20W on average<\/td>\n<\/tr>\n\n <\/tbody>\n <\/table>\n <\/div>\n <\/div>\n

\u25cf Cutting depth of 5 \u00b5m<\/p>\n

\n
\n \"5\u03bcm\u30ab\u30c3\u30c8\"\n <\/div>\n
\"5\u03bcm\u30ab\u30c3\u30c8\"\n

First, the polyimide layer on the top is processed to make cutting 5 \u00b5m in depth.\nCutting depth can be controlled in microns so that engravement-like appearance is achieved.\n <\/p>\n <\/div>\n

\"5\u03bcm\u30ab\u30c3\u30c8\"<\/div>\n <\/div>\n

\u25cf Cutting depth of 15 \u00b5m<\/p>\n

\n
\n \"15\u03bcm\u30ab\u30c3\u30c8\"\n <\/div>\n
\"15\u03bcm\u30ab\u30c3\u30c8\"\n

Deeper cutting reveals the converged angle of the laser-beam along the side of the grooves.\nThe groove formed with taper has a slight difference in the groove widths between in the incident side and in the bottom side.\n\n <\/p>\n <\/div>\n

\"15\u03bcm\u30ab\u30c3\u30c8\"<\/div>\n <\/div>\n

\u25cf Cutting depth of 25 \u00b5m<\/p>\n

\n
\n \"Cutting\n <\/div>\n
\"Cutting\n

Deeper grooves are formed until reaching the very limit to the cupper foil layer.
\nIt proves that partial cutting\/peeling process is possible in femto-second laser processing.\n\n <\/p>\n <\/div>\n

\"Cutting<\/div>\n <\/div>\n

\u25cf Through hole cutting<\/p>\n

\n
\n \"Through\n <\/div>\n
\"Through\n

Lastly, through holes are formed into the substrate.\nDespite double-sided hole making, the holes are made in high accuracy for every material. This can minimize the adverse effect of convergence angle of laser-beam in the process.\n\n <\/p>\n <\/div>\n <\/div>\n <\/div>\n\n\n\n\n\n\n<\/div>\n\n\n\n

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Micro-hole making on a film<\/h4>\n

High precision processing which gives less thermal effect on a material and generates no-burr is possible.
\nThe sample on the photos below shows that high density micro holes with 10 \u03bcm in diameter made on a polyimide film. This process can be conducted on a small-diameter pipe as well as on a film.<\/p>\n<\/div>\n

\"Micro-hole<\/div>\n<\/div>\n\n
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Nanoperiodic structure on a stainless-steel sheet<\/h4>\n

Micro slits are made on the stainless-steel surface using the excitation period of a laser pulse. Changing the slit angles makes beautiful iridescent patterns on the disk.<\/p>\n<\/div>\n

\"Nanoperiodic<\/div>\n<\/div>\n\n
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  • – We use an electron microscope (with elemental analysis function) to check the state of microfabrication and optimize processing conditions.<\/li><\/ul>\n\n

    Femtosecond Laser Processing and Electron Microscopy MOVIE<\/h4>\n
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